3 o Ring Guide Issue 7 PDF
3 o Ring Guide Issue 7 PDF
3 o Ring Guide Issue 7 PDF
Issue 7
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O Ring Guide
Contents
Page
Quality production and inspection How to use this guide
Our Materials Technology Centre houses Selecting an O ring 4
one of Europes most advanced facilities Selecting a back-up ring 5
for elastomer batch production. At its heart Selecting a material 6
is a computer-controlled internal mixer How to order 7
that holds formulae for all our elastomeric
compounds well over 300 in total. Materials & properties
General materials 8
Together with on-line rheometer testing, High performance materials 9
this gives us complete batch traceability, Guide to material use 10
regardless of any release certificate Service grades 10
requirements. Rapid gas decompression 11
Micro-Vu optical inspection system FEP encapsulated O rings 12
The post-curing of silicone and Back-up rings 12
fluorocarbon elastomers is also under
microprocessor control for temperature James Walker O rings
and time. Each cure cycle is recorded and Chart 50: inch & metric sizes 13-16
is traceable as a vital link in our quality O rings for pipe fittings 16
chain. Aerospace sizes to BS ISO 3601-1 17-20
Chart 72: metric sizes 21-22
Every O ring manufactured by James Chart 17000: inch sizes 23
Walker is visually inspected by a Non-standard sizes 24
dedicated human inspector, or an
automated optical inspection system, to Complementary products
the appropriate grade requirements of Coloured materials 25
O ring cord 25
BS ISO 3601-3. Each production
Commercial quality O rings 25
batch of seals is further dimensionally
Basler Vario2 fully-automated inspection system O ring kits 26
verified using our highly accurate and
Special packaging & kits 26
reproducible optical inspection systems.
O ring lubricants 26
These state-of-the-art optical systems are
General design notes 27-28
the Micro-Vu and fully-automated Basler
Vario2, both of which offer sub-micron Housing design 29-31
resolution with exceptional repeatability. General information 31
Contact details 32
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How to use this guide
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How to use this guide
For new applications Selecting a back-up ring Back-up ring for a new application
1) Refer to Design sections, pages 1) Select the O ring you require from
27-31, for guidance with regard to One or more back-up rings are used to our Charts, using the method outlined
applications. prevent extrusion of an elastomeric O earlier on this page.
ring under arduous operating conditions.
2) For aerospace equipment, select O 2) Refer to How to order section on page 7
ring from Aerospace Sizes to BS ISO Our standard back-up rings are machined for precise specification details.
3601-1, pages 17-20. in PTFE and normally supplied in single
turn or spiral form. See page 12 for more
3) For general metric equipment, select details on back-up rings.
O ring from Chart 72, pages 21-22.
Back-up rings for use with James
4) If the metric size you require is not Walker O ring number
available from Chart 72, then select Refer to How to order section on page 7
from the metric columns in Chart 50, for precise specification details relating to
pages 13-16. back-up rings for Chart 50, Chart 72 and
Chart 17000 applications.
5) For general inch sizes, use Chart 50, or
Chart 17000 on page 23. Back-up ring for use with existing
O ring
1) Identify appropriate Chart and part
number for existing O ring. (Note: If
a standard O ring has been used on
a non-standard shaft or cylinder ie,
compressed or stretched into place
the equivalent standard back-up
ring must not be used as it cannot be
stretched or squeezed in the same way.)
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How to use this guide
Selecting a material
Stocked material grades
Standard compound
Rubber type Specifications Stocked Colour ASTM D2000 reference
reference
ASTM D2000 M2BG 810, B14, EF11 , EF21,
PB80 Medium nitrile (NBR) BS6996 Grade BO80 Black
EO14, EO34.
ASTM D2000 M3BA 810, A14, B13, Z1.
EP18/H/75 Ethylene-propylene (EPM) Black
Z1: Hardness 755 IRHD
FR10/80 Fluorocarbon (FKM) DTD 5612A Grade 80** Black ASTM D2000 M6HK 810, A1-10, B36
FR25/90* Fluorocarbon (FKM) Black ASTM D2000 M7HK 914, B38, Z1*
FR58/90* Fluorocarbon (FKM) Black ASTM D2000 M3HK 910, A1-10, B38, Z1*
Elast-O-Lion 101*
Hydrogenated nitrile (HNBR) Black
Elast-O-Lion 180
Hydrogenated nitrile (HNBR) Black
Elast-O-Lion 985* Hydrogenated nitrile (HNBR) Black
ASTM D2000 7GE 805, A19, B37, EO36, Z1
SIL 80/2 Silicone (VMQ) BS F153 Grade 80 White
Z1: colour white
*These grades are compounded for Rapid Gas Decompression (RGD) resistance: please consult our Technical Support Team for specific details.
** All DTD specifications have been declared obsolescent.
Red: Please specify on your enquiry or order if you want O rings to meet these specifications.
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How to use this guide
How to order
The following information and examples
will help you to order the correct O ring
and back-up ring for specific applications.
For critical applications, including those
requiring FEP encapsulated O rings, we
recommend that you state the following
details to enable us to ensure suitability:
O rings
Standard sizes Charts 50, 72 & 17000:
please state the JW number followed
Back-up rings for Chart 50 metric sizes: Back-up rings for other sizes: When
by material reference. If no material or
When ordering back-up rings to match ordering back-up rings to match O rings
application conditions are specified, we
our suggested Chart 50 metric shaft and that are not listed in our charts, please
will supply our PB80 nitrile grade.
cylinder sizes, please use: state the following:
EXAMPLE: JW 50-001 PB80. 1) Spiral or single turn, and material.
l Prefix 150 for shaft applications.
l Prefix 250 for cylinder applications. 2) Back-up ring dimensions, if known, or
Aerospace sizes to BS ISO 3601-1: lAlso indicate spiral or single turn and
please use the following example, where 3) O ring inside diameter B; O ring
material.
XXXX denotes Size Code, YYY denotes ID, section diameter A; shaft or cylinder
and ZZZ denotes cross-section diameter. diameter (C or D); housing width and
(The reason is that O rings can be
stretched or squeezed slightly see depth (E and F) see page 29.
EXAMPLE: O ring BS ISO 3601-1A-XXXX
General design notes on pages 27-28 EXAMPLE: PTFE spiral back-up ring to
YYY x ZZZ S, in FR10/80 to DTD 5612A
but the back-up ring must be use with a 49.4mm ID x 4.1mm DS O ring
Grade 80.
manufactured exactly to suit the shaft or on a 50mm diameter shaft. Housing width
cylinder.) 7.1mm, depth 3.5mm.
Other sizes: please state ID, cross-section
diameter and material.
EXAMPLE 1: For 140mm OD shaft, order Note: Back-up rings are manufactured
JW 150-433 PTFE spiral back-up ring. to suit housing sizes, rather than 'O' ring
EXAMPLE: ID 49.4mm, DS 4.1mm, PB80
sizes. Therefore back-up rings cannot be
EXAMPLE: For 155mm ID cylinder, order supplied based on O ring dimensions
Back-up rings
JW 250-433 PTFE spiral back-up ring. alone.
Back-up rings are supplied in spiral form
unless single turn is stated. Also, they are
Back-up rings for Aerospace Sizes to BS Subsequent orders
supplied in PTFE unless otherwise stated.
ISO 3601-1: Please contact our Technical When re-ordering from James Walker,
Support Team for back-up rings to BS ISO please state the Re-Order Part Number
Back-up ring for Chart 50 inch sizes: for
3601-4. (eg, OB03400X) shown on our
back-up rings to fit inch size shafts and
cylinders, state the JW number for the O documentation that acknowledges your
Back-up rings for Chart 72: When previous order. This will ensure the
ring. Also indicate spiral or single turn, and
ordering back-up rings (which cover those swiftest service.
material.
to BS 5106) please state the same JW 72
number as the O ring. Also indicate spiral B
EXAMPLE: For a JW 50-433 (0.275
or single turn, and material.
diameter section) O ring on a 5 OD A
shaft or 6 ID cylinder, order JW 50-433
EXAMPLE: JW 72-1393-57 PTFE spiral
PTFE spiral back-up ring.
back-up ring.
O ring diameter section A and
inside diameter B.
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Materials & properties
General materials
Note: Materials for stocked O rings are
printed in red. For specific details please
see Selecting a material on page 6.
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Materials & properties
High performance materials FR58/90 & 98: These terpolymer-based Kalrez perfluoroelastomer (FFKM)
grades resist rapid gas decompression These materials offer almost universal
Fluoroelastomers (FKM) eg, Viton, (RGD) as described on page 11, and have chemical resistance, with grades available
Tecnoflon, Dyneon base polymers good all round elastomeric properties. for continuous duties up to 325C. James
Stocked grades: FR10/80, FR25/90, Walker is Authorised Distributor in the UK,
FR58/90 FR25: Tetrapolymer-based range with Ireland and France for the design, supply
Fluoroelastomers operate efficiently hardnesses of 70 to 90 IRHD. It offers and technical support of sealing and fluid
under severe chemical conditions and at fluid resistance approaching that of our handling parts made from DuPont
higher temperatures where many other FR10 range, together with improved low Kalrez.
seal materials cannot survive. According temperature characteristics. FR25/90 is
to grade, they are well suited to arduous compounded for RGD resistant duties Fluolion (PTFE)
applications involving: down to -41C. FR25/90 has excellent Fluolion is James Walkers registered
resistance to sour gas (H2S). trade name for products manufactured
lTemperature capabilities ranging from in PTFE. The chemical resistance of
-41C to +250C, depending on grade. FR64/70 & 80: Dipolymer-based grades virgin PTFE is almost universal with
lPetroleum fuels and mineral-based that offer enhanced performance in steam, the exception of molten alkali metals,
hydraulic fluids. hot water and mineral acids. fluorine gas and elemental fluorine. These
lMany solvents. chemical properties make PTFE the ideal
LR5853: Tetrapolymer-based range with material for O ring back-up rings.
We have developed numerous grades of hardnesses of 80, 90 and 98 IRHD. It has
fluoroelastomers, including the following: enhanced fluid resistance, especially with The flow characteristics of PTFE under
methanol and gasoline-alcohol blends stress are a disadvantage in O rings.
General purpose fluoroelastomers that affect other fluoroelastomers. These
FR10: Dipolymer-based range with grades stiffen below -5C, thus LR6316 Elast-O-Lion hydrogenated nitrile
hardnesses of 50 to 90 IRHD. These and FR25 are recommended for low (HNBR)
grades are ideal for general applications temperature applications. Stocked grades: Elast-O-Lion 101,
and meet UK Ministry of Defence (DTD) 180, 985
low compression set specifications. LR6316: Available in hardnesses of 75 Elast-O-Lion is James Walkers
and 90 IRHD, this compound is based on registered trade name for its range of
FR17: Terpolymer-based range with a special tetrapolymer with a similar fluid high-performance hydrogenated nitrile
hardnesses of 65 to 95 IRHD. It has resistance to LR5853, plus improved low compounds.
enhanced chemical resistance and better temperature characteristics for service
down to -29C. These materials have the excellent oil/
low temperature flexibility characteristics
fuel resistance of traditional nitrile (NBR)
than FR10, although these properties
elastomers with a similar ACN content.
are to some extent at the expense of
Aflas (FEPM) They also have superior mechanical
compression set resistance.
These compounds have resistance to properties and can sustain higher service
lubricants and some fuels approaching temperatures: eg, 180C in oil. In addition,
FR44: Dipolymer-based range with
that of fluorocarbon dipolymers but, in they display superior resistance to
hardnesses of 50 to 90 IRHD. It comes
addition, are suitable for sour gas duties or aggressive fluids such as sour (H2S) crude
in a distinctive shade of green for easy
where amines and high temperature water oil, lubricating oil additives and amine
identification. These low compression
or steam are used. corrosion inhibitors. Fully saturated grades
set grades meet many regularly used
of HNBR have excellent resistance to ozone.
specifications.
AF85: Available in hardnesses of 70, 80
and 90 IRHD. Typical maximum service Four ranges are suitable for O ring
Special fluoroelastomer grades
temperature is 200C although higher manufacture, with various acrylonitrile
Many grades are available for specific
temperatures can be sustained in some contents from low to ultra high, and
duties, including the following:
media: eg, 260C in steam. Other special hardnesses from 60 to 90 IRHD.
grades are available, such as AF69/90 Two grades Elast-O-Lion 101 and
FR68/90: First of our new generation
that is compounded for rapid gas 985 are extremely well proven in
of oil and gas materials. This low
decompression (RGD) resistance. oilfield applications, where mechanical
compression set elastomer offers
strength, plus resistance to rapid gas
excellent resistance to rapid gas
decompression (RGD) and chemical
decompression (RGD), plus excellent
attack, is required.
resistance to sour gas (H2S), amines and
steam/hot water. We are market leader in
Temperature capability is between -55C
the design and manufacture of seals for
and +180C, depending on material grade
RGD environments (see page 11).
and application.
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Materials & properties
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Acrylic ACM 2 4 4 4 4 4 4 4 3 3 4 1 3 1 1 1 1 1 2 1 1 1 4 4 4 4 4 4 20 150 175 80
Aflas FEPM 1 1 1F 1 1 1 1 1 3 4 4 1 3 2 1 1 1 1 2 1 1 1 2 1 1 1 1 2 0 200 230F 70 - 90
Butyl IIR 1 1 2 1 1 1 1 1 4 4 1 4 4 4 4 2 4 4 4 1 3 4 4 4 4 1 2 2 35 120 150 60 - 70 BS 3227
Chlorosulphonyl polyethylene CSM 2 1 3 4 1 1 3 4 4 4 4 3 4 4 4 3 3 4 4 1 2 2 4 4 3 1 4 4 30 120 150 65 - 80
Elast-O-Lion HNBR 1 1 1 1 2 1 2 1 2 4 4 1 3 2 1 1 2 1 1 1 1 1 4 2 2 2 3 4 25A 150 170 50 - 90 DEF STAN 02-337
Epichlorohydrin ECO 2 1 2 3 2 2 4 1 4 4 4 3 4 1 1 1 1 1 4 1 1 1 4 2 2 2 4 4 30 150 175 70 - 90
Ethylene-propylene EPM/EPDM 1 1 1 2 1 1 1 2 4 3 1 1 4 4 4 2 4 4 4 1 3 4 4 4 4 1 1 2 45 120 150B 50 - 90 BS F 156, 162
Fluolion PTFE 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 200 250
Fluoroelastomers FKM 1 1 3 1 2 4C 4C 4C 1 3C 4C 1 1 1 1 1 1 1 2 1 1 1 2 1 1 2 1 1 15D 200 230D 50 - 98 DEF STAN 02-337,
*DTD 5543, 5603, 5612, 5613.
Fluorosilicone FVMQ 1 1 2 3 2 1 4 4 2 3 4 1 1 2 1 1 2 1 2 1 1 2 2 2 2 2 3 3 60 180 200 60 - 80 BS F 154
Kalrez FFKM 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 40 325 70 - 95 SAE AMS 7257
Natural rubber NR 3 1 2 3 2 2 3 2 4 4 4 4 4 4 4 4 4 4 4 1 4 4 4 4 4 3 4 4 50 100 120 40 - 85 BS 1154
Neoprene CR 1 1 2 3 1 1 3 2 4 4 4 2 4 3 2 2 3 2 3 1 3 3 4 4 4 3 4 4 40 120 150 40 - 90 BS 2752
Nitrile NBR 2 1 2 3 2 1 3 2 3 4 4 1 3 2 1 1 2 1 2 1 1 1 4 3 3 1 4 4 30A 120 150 40 - 90 BS 2751, 6996, 6997, DEF
STAN 02-337, *DTD 5509,
5594, 5595, 5606, 5607.
Polyurethane AU/EU 1 4 4 4 4 4 4 4 3 2 4 2 4 2 2 2 3 2 4 1 2 1 4 4 4 4 4 4 15 85 100 55 - 95E
Silicone VMQ 1 1 2 3 2 1 2 2 4 4 3 3 4 4 4 2 4 3 3 4 1 4 3 3 4 2 2 3 65 200 250 40 - 80 BS F 152, 153, 159
2 Good C Fluoroelastomer grades are available that offer resistance to these chemicals.
3 Fair D Fluoroelastomer grades are available for temperatures down to -41C and up to +250C intermittent.
4 Not recommended E Polyurethane grades are also available in hardnesses from 60 to 74 Shore D.
F Some Aflas grades will work at temperatures to +260C in hot water and steam.
Note: These figures are for guidance only. Service life will depend on type of application, whether static or dynamic, specific pressure
medium, temperature cycle, time of exposure, etc. In general, the low temperatures quoted are at atmospheric pressure and may change
at elevated pressures.
Service grades
O rings precision moulded by James lGrade CS (Critical Services) is also
Walker are supplied with quality available. This is typically for critical
acceptance criteria as follows: aerospace and medical duties. Please
discuss your requirements with our
lStandard supply: Grade N of Technical Support Team.
BS ISO 3601-3 Fluid power systems
O-rings Part 3: Quality acceptance Commercial quality O rings (page 25)
criteria. and items in our O ring kits (page 26) are
normally supplied to Grade N.
lGrade S: This higher grade is
provided when required typically Note: For cross sections below 0.8mm
for aerospace, critical industrial or or above 8.4mm, please contact our
automotive applications. Technical Support Team.
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Materials & properties
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Materials & properties
Groove Groove
length length Pressure Pressure
Back-up rings 1 back-up 1 back-up Groove
length
Groove
from
length from
either either
2 back-ups 2 back-ups direction
direction
Back-up rings are installed to prevent
the extrusion of the O ring. They are
manufactured from Fluolion PTFE (virgin Groove Groove
or filled), and PEEK TM. length length Pressure Pressure
Groove Groove from
1 back-up 1 back-up Direction of pressure
lengthfrom
Direction of pressurelength either either
2 back-ups 2 back-ups
direction direction
They are recommended for applications
where:
lSystem pressure exceeds 10MPa
(1450psi), or O rings of low strength
Direction of pressure Direction of pressure
elastomer are used, or
lAdverse mechanical conditions exist.
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Chart 50: inch & metric
Header
sizes
James Walker Chart 50 reflects the standards in many countries, Refer to page 29 for List of Symbols
particularly those of the UK and USA. For ordering details, please INCH DIAMETERS METRIC DIAMETERS (mm)
James
see page 7. Walker Inside Inside Shaft Cyl.
Number Dia. B C, P, T D, Q Dia. B C D
Reference numbers printed in red indicate sizes covered by: 0.040 0.003" (1.02 0.08mm) Diameter Section A
50-001 0.029 0.004 # # 0.74 0.10 0.8 2.5
" 606 0.070 0.005 1.78 0.13 2 3.6
lBS 1806: Dimensions of toroidal sealing rings (O rings) and " 607 0.100 " 2.54 " 2.8 4.5
their housings (inch sizes), 0.050 0.003" (1.27 0.08mm) Diameter Section A
lBS ISO 3601-1: Fluid power systems O rings Part 1: Inside 50-002 0.042 0.004 0.130 1.07 0.10 1.2 3.3
diameters, cross-sections, tolerances and designation codes, 0.060 0.003" (1.52 0.08mm) Diameter Section A
and 50-003 0.056 0.004 1.42 0.10 1.5 4.1
lSAE AS 568: American National Standard Aerospace size 0.070 0.003" (1.78 0.08mm) Diameter Section A
standard for O rings. 50-004* 0.070 0.005 1.78 0.13 2 5
" 005* 0.101 " 2.57 " 2.8 6
" 006* 0.114 " 2.90 " 3 6.2
" 801* 0.125 " 3.18 " 3.5 6.5
Although the basic range is in inches, the O rings can of course " 007* 0.145 " # # 3.68 " 4 7
be used for sealing metric dimensioned components. Chart 50 " 008* 0.176 " 4.47 " 4.5 8
includes suggested metric shaft and cylinder sizes for which each " 802*
" 009*
0.188
0.208
"
"
#
4.76 "
# 5.28 "
5 8.5
5.5 9
individual O ring is suitable. (Note: these figures are NOT merely " 010* 0.239 " 6.07 " 6 9.5
" 803* 0.250 " 6.35 " 6.5 9.8
direct metric conversions of inch sizes. Also, separate ranges of
" 610* 0.266 " # # 6.75 " 7 10
back-up rings are available for metric shafts and cylinders see " 011* 0.301 " 7.65 " 7.5 11
page 7 for ordering references.) " 804* 0.313 " 7.94 " 8 11.5
" 611* 0.344 " # # 8.73 " 9 12
" 012* 0.364 " 9.25 " 9.5 12.5
BS ISO 3601 sizes & tolerances " 013 0.426 " 10.82 " 11 14.2
BS 1806 has been superseded by BS ISO 3601-1 (dimensions) " 806 0.438 " 11.11 " 11.5 14.5
" 014 0.489 " 12.42 " 12.5 16
and BS ISO 3601-2 (housings), but BS 1806 is still widely " 015 0.551 0.007 14.00 0.18 14 17.5
" 016 0.614 0.009 15.60 0.23 15.5 19
referenced by industry. The size codes in BS ISO 3601-1 (non-
" 017 0.676 " 17.17 " 17 20.5
aerospace) are, with a few exceptions, the same as BS 1806. " 018 0.739 " 18.77 " 19 22.5
However, there are two tolerance bands, Class A and Class B, " 019
" 020
0.801
0.864
"
"
1
20.35 "
21.95 "
20
22
24
25.5
with the tighter tolerances of Class A equating to BS 1806. Our " 021 0.926 " 1 23.52 " 23 27
Chart 50 meets the Class A tolerances. " 022 0.989 0.010 1 1 25.12 0.25 25 29
" 023 1.051 " 1 1 26.70 " 27 30
" 024 1.114 " 1 1 28.30 " 28 32
The A suffix size codes in BS 1806 (eg, 445A) do not appear as " 025 1.176 0.011 1 1 29.87 0.28 30 34
" 026 1.239 " 1 1 31.47 " 31 35
standard sizes in BS ISO 3601-1, but have been retained in Chart
50 as they are still requested. " 027 1.301 " 1 1 33.05 " 32 37
" 028 1.364 0.013 1 1 34.65 0.33 35 38
" 517 1.428 " 1 1 36.27 " 36 40
" 029 1.489 " 1 1 37.82 " 38 42
Using a size code reference such as 445A can result in different " 519 1.553 " 1 1 39.45 " 39 43
size seals being supplied depending on whether BS 1806 or BS
" 030 1.614 " 1 1 41.00 " 40 45
ISO 3601-1 is involved. For example, using BS ISO 3601-1, a " 031 1.739 0.015 1 1 44.17 0.38 44 48
" 032 1.864 " 1 2 47.35 " 47 51
reference of 445A would indicate a size code of 445 with Class A " 033 1.989 0.018 2 2 50.52 0.46 50 55
tolerances. " 034 2.114 " 2 2 53.70 " 53 58
" 035 2.239 " 2 2 56.87 " 56 61
" 036 2.364 " 2 2 60.05 " 60 65
Thus, when ordering an A suffix size code from BS 1806, it is " 037 2.489 " 2 2 63.22 " 63 67
important to quote BS 1806 and not just the size code. " 038 2.614 0.020 2 2 66.40 0.51 65 70
" 039 2.739 " 2 2 69.57 " 69 75
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Chart 50: inch & metric sizes
0.070 0.003 (1.78 0.08mm) Diameter Section A 0.103 0.003 (2.62 0.08mm) Diameter Section A
" 146 2.612 0.020 2 2 66.34 0.51 66 72
50-550 5.345 0.037 5 5 135.76 0.94 135 140 " 147 2.675 0.022 2 2 67.95 0.56 68 74
" 551 5.470 " 5 5 138.94 " 138 145 " 148 2.737 " 2 2 69.52 " 69 75
" 552 5.595 " 5 5 142.11 " 140 148 " 149 2.800 " 2 3 71.12 " 70 77
" 553 5.720 " 5 5 145.29 " 145 150 " 150 2.862 " 2 3 72.69 " 72 78
" 554 5.845 " 5 6 148.46 " 148 155
" 640 2.924 0.024 2 3 74.27 0.61 74 80
" 555 5.970 " 6 6 151.64 " 150 158 " 151 2.987 " 3 3 75.87 " 75 82
" 556 6.095 0.040 6 6 154.81 1.02 155 160 " 641 3.049 " 3 3 77.44 " 77 85
" 557 6.220 " 6 6 157.99 " 158 162 " 642 3.174 " 3 3 80.62 " 80 87
" 558 6.345 " 6 6 161.16 " 160 165 " 152 3.237 " 3 3 82.22 " 82 88
" 559 6.470 " 6 6 164.34 " 165 170 " 643 3.299 " 3 3 83.79 " 84 90
" 560 6.595 " 6 6 167.51 " 167 172 " 153 3.487 " 3 3 88.57 " 88 95
" 561 6.720 " 6 6 170.69 " 170 175 " 154 3.737 0.028 3 3 94.92 0.71 95 100
" 562 6.845 " 6 7 173.86 " 174 180 " 155 3.987 " 4 4 101.27 " 100 110
" 156 4.237 0.030 4 4 107.62 0.76 107 115
" 157 4.487 " 4 4 113.97 " 114 120
0.103 0.003 (2.62 0.08mm) Diameter Section A
50 -102* 0.049 0.005 1.24 0.13 1.5 6 " 158 4.737 " 4 4 120.32 " 120 130
" 103* 0.081 " # # 2.06 " 2.3 7 " 159 4.987 0.035 5 5 126.67 0.89 125 135
" 104* 0.112 " 2.84 " 3 7.5 " 160 5.237 " 5 5 133.02 " 132 140
" 105* 0.143 " # # 3.63 " 4 8.5 " 161 5.487 " 5 5 139.37 " 138 145
" 106* 0.174 " 4.42 " 4.5 9.5 " 162 5.737 " 5 5 145.72 " 145 155
" 107* 0.206 " # # 5.23 " 5.5 10 " 163 5.987 " 6 6 152.07 " 150 160
" 108* 0.237 " 6.02 " 6 11 " 164 6.237 0.040 6 6 158.42 1.02 158 165
" 109* 0.299 " 7.59 " 7.5 12.5 " 165 6.487 " 6 6 164.77 " 165 170
" 110* 0.362 " 9.19 " 9.5 14 " 166 6.737 " 6 6 171.12 " 170 180
" 613* 0.391 " # # 9.92 " 10 15 " 167 6.987 " 7 7 177.47 " 177 185
" 111* 0.424 " 10.77 " 11 16 " 168 7.237 0.045 7 7 183.82 1.14 183 190
" 614* 0.469 " # # 11.91 " 11.5 17 " 169 7.487 " 7 7 190.17 " 190 200
" 112* 0.487 " 12.37 " 12 17.5 " 170 7.737 " 7 7 196.52 " 195 205
" 807* 0.500 0.007 12.70 0.18 12.5 17.8 " 171 7.987 " 8 8 202.87 " 200 210
" 615* 0.516 " 13.10 " 13 18 " 172 8.237 0.050 8 8 209.22 1.27 208 215
" 113* 0.549 " 13.94 " 14 19 " 173 8.487 " 8 8 215.57 " 215 225
" 616* 0.594 " # # 15.08 " 15 20 " 174 8.737 " 8 8 221.92 " 220 230
" 114* 0.612 0.009 15.54 0.23 15.5 20.5 " 175 8.987 " 9 9 228.27 " 225 235
" 809* 0.625 " 15.88 " 16 21 " 176 9.237 0.055 9 9 234.62 1.40 235 240
" 115* 0.674 " 17.12 " 17 22 " 177 9.487 " 9 9 240.97 " 240 250
" 178 9.737 " 9 9 247.32 " 245 255
" 810* 0.688 " 17.46 " 17.5 22.5
" 617* 0.703 " # # 17.86 " 18 23 0.139 0.004 (3.53 0.10mm) Diameter Section A
" 116* 0.737 " 18.72 " 19 24
" 117 0.799 0.010 1 20.29 0.25 20 25.5 50 -201* 0.171 0.005 4.34 0.13 4.5 11
" 812 0.813 " 1 20.64 " 20.5 26 " 202* 0.234 " 5.94 " 6 12.5
" 203* 0.296 " 7.52 " 7.5 14
" 118 0.862 " 1 21.89 " 21 27 " 204* 0.359 " 9.12 " 9.5 16
" 813 0.875 " 1 22.23 " 22 27.5 " 205* 0.421 " 10.69 " 11 17.5
" 119 0.924 " 1 23.47 " 23 28.5
" 814 0.938 " 1 23.81 " 23.5 29 " 206* 0.484 " 12.29 " 12.5 19
" 120 0.987 " 1 1 25.07 " 25 30 " 207* 0.546 0.007 13.87 0.18 14 20.5
" 208* 0.609 0.009 15.47 0.23 15.5 22
" 121 1.049 " 1 1 26.64 " 27 32 " 209* 0.671 " 17.04 " 17 24
" 122 1.112 " 1 1 28.24 " 28 34 " 210* 0.734 0.010 1 18.64 0.25 19 25
" 123 1.174 0.012 1 1 29.82 0.30 30 35
" 124 1.237 " 1 1 31.42 " 31 37 " 211* 0.796 " 1 20.22 " 20 28
" 125 1.299 " 1 1 32.99 " 32 38 " 212* 0.859 " 1 21.82 " 22 29
" 213* 0.921 " 1 23.39 " 23 30
" 126 1.362 " 1 1 34.59 " 35 40 " 214* 0.984 " 1 1 24.99 " 25 32
" 127 1.424 " 1 1 36.17 " 36 42 " 618* 1.016 " 1# 1# 25.80 " 26 33
" 128 1.487 " 1 1 37.77 " 38 43
" 129 1.549 0.015 1 1 39.34 0.38 39 45 " 215* 1.046 " 1 1 26.57 " 27 34
" 130 1.612 " 1 1 40.94 " 40 47 " 216* 1.109 0.012 1 1 28.17 0.30 28 35
" 131 1.674 " 1 1 42.52 " 42 48 " 217* 1.171 " 1 1 29.74 " 30 36
" 132 1.737 " 1 1 44.12 " 44 50 " 218* 1.234 " 1 1 31.34 " 31 38
" 133 1.799 " 1 2 45.69 " 45 51 " 219* 1.296 " 1 1 32.92 " 32 40
" 134 1.862 " 1 2 47.29 " 47 53
" 135 1.925 0.017 1 2 48.90 0.43 48 55 " 220* 1.359 " 1 1 34.52 " 35 42
" 221* 1.421 " 1 1 36.09 " 36 43
" 136 1.987 " 2 2 50.47 " 50 56 " 222* 1.484 0.015 1 1 37.69 0.38 38 45
" 137 2.050 " 2 2 52.07 " 52 58 " 824 1.563 " 1 1 39.69 " 39 47
" 138 2.112 " 2 2 53.64 " 53 60 " 223 1.609 " 1 1 40.87 " 40 48
" 139 2.175 " 2 2 55.25 " 55 61
" 140 2.237 " 2 2 56.82 " 56 62 " 825 1.625 " 41.28 " 41 49
" 826 1.688 " 1 1 42.86 " 42 50
" 141 2.300 0.020 2 2 58.42 0.51 58 65 " 224 1.734 " 1 2 44.04 " 43 51
" 142 2.362 " 2 2 59.99 " 60 66 " 827 1.750 " 44.45 " 44 52
" 143 2.425 " 2 2 61.60 " 61 67 " 828 1.813 " 1 2 46.04 " 45 53
" 144 2.487 " 2 2 63.17 " 63 69
" 145 2.550 " 2 2 64.77 " 65 70 " 225 1.859 0.018 1 2 47.22 0.46 46 54
" 829 1.875 " 47.63 " 47 55
" 830 1.938 " 1 2 49.21 " 48 56
* See Static/dynamic applications, page 13 " 226 1.984 " 2 2 50.39 49 58
" 831 2.000 " 50.80 " 50 59
14 To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
Chart 50: inch & metric sizes
0.139 0.004 (3.53 0.10mm) Diameter Section A 0.210 0.005 (5.33 0.13mm) Diameter Section A
" 832 2.063 0.018 2 2 52.39 0.46 52 60 50-309* 0.412 0.005 10.46 0.13 11 20.5
" 227 2.109 " 2 2 53.57 " 53 61 " 310* 0.475 " 12.07 " 12.5 22
" 833 2.125 " 53.98 " 54 62 " 311* 0.537 0.007 13.64 0.18 14 23.5
" 834 2.188 " 2 2 55.56 " 55 63 " 312* 0.600 0.009 1 15.24 0.23 15.5 25
" 228 2.234 0.020 2 2 56.74 0.51 56 64 " 313* 0.662 " 1 16.81 " 17 27
" 835 2.250 " 57.15 " 57 65 " 314* 0.725 0.010 1 18.42 0.25 19 28.5
" 836 2.313 " 2 2 58.74 " 58 66 " 315* 0.787 " 1 19.99 " 20 30
" 229 2.359 " 2 2 59.92 " 59 67 " 316* 0.850 " 1 21.59 " 22 31.5
" 837 2.375 " 60.33 " 60 68 " 317* 0.912 " 1 23.16 " 23 33
" 838 2.438 " 2 2 61.91 " 61 69 " 318* 0.975 " 1 1 24.77 " 25 35
" 230 2.484 " 2 2 63.09 " 62 70 " 319* 1.037 " 1 1 26.34 " 27 36.5
" 839 2.500 " 63.50 " 63 71 " 320* 1.100 0.012 1 1 27.94 0.30 28 38
" 840 2.563 " 2 2 65.09 " 64 72 " 321* 1.162 " 1 1 29.51 " 30 40
" 231 2.609 " 2 2 66.27 " 65 73 " 322* 1.225 " 1 1 31.12 " 31 42
" 841 2.625 " 66.68 " 66 74 " 323* 1.287 " 1 1 32.69 " 32 43
" 842 2.688 " 2 2 68.26 " 67 75 " 324* 1.350 " 1 1 34.29 " 35 45
" 232 2.734 0.024 2 3 69.44 0.61 68 76 " 325* 1.475 0.015 1 1 37.47 0.38 38 48
" 843 2.750 " 69.85 " 69 77 " 326* 1.600 " 1 2 40.64 " 40 52
" 844 2.813 " 2 3 71.44 " 70 79 " 327* 1.725 " 1 2 43.82 " 42 55
" 233 2.859 " 2 3 72.62 " 71 80 " 328* 1.850 " 1 2 46.99 " 45 58
" 845 2.875 " 73.04 " 72 81 " 329* 1.975 0.018 2 2 50.17 0.46 50 62
" 846 2.938 " 2 3 74.61 " 74 82
" 330* 2.100 " 2 2 53.34 " 52 65
" 234 2.984 " 3 3 75.79 " 75 85
" 331* 2.225 " 2 2 56.52 " 56 68
" 235 3.109 " 3 3 78.97 " 78 88
" 332* 2.350 " 2 2 59.69 " 60 70
" 236 3.234 " 3 3 82.14 " 80 90
" 333* 2.475 0.020 2 2 62.87 0.51 63 75
" 237 3.359 " 3 3 85.32 " 85 95
" 238 3.484 " 3 3 88.49 " 88 98 " 334* 2.600 " 2 3 66.04 " 65 78
" 239 3.609 0.028 3 3 91.67 0.71 90 100 " 335* 2.725 " 2 3 69.22 " 68 80
" 240 3.734 " 3 4 94.84 " 95 102 " 336* 2.850 " 2 3 72.39 " 70 83
" 241 3.859 " 3 4 98.02 " 98 105 " 619* 2.938 0.024 2 3 74.61 0.61 72 85
" 337* 2.975 " 3 3 75.57 " 75 88
" 242 3.984 " 4 4 101.19 " 100 110
" 243 4.109 " 4 4 104.37 " 104 112 " 338* 3.100 " 3 3 78.74 " 78 90
" 244 4.234 0.030 4 4 107.54 0.76 107 115 " 620* 3.141 " 79.78 " 80 92
" 245 4.359 " 4 4 110.72 " 110 120 " 339* 3.225 " 3 3 81.92 " 82 95
" 246 4.484 " 4 4 113.89 " 114 122 " 340* 3.350 " 3 3 85.09 " 85 98
" 341* 3.475 " 3 3 88.27 " 88 100
" 247 4.609 " 4 4 117.07 " 116 125
" 248 4.734 " 4 5 120.24 " 120 130 " 621* 3.531 0.028 3 3 89.69 0.71 90 101
" 249 4.859 0.035 4 5 123.42 0.89 123 132 " 342* 3.600 " 3 4 91.44 " 92 102
" 250 4.984 " 5 5 126.59 " 125 135 " 343* 3.725 " 3 4 94.62 " 95 105
" 251 5.109 " 5 5 129.77 " 130 138 " 344* 3.850 " 3 4 97.79 " 98 108
" 622* 3.938 " 3 4 100.01 " 100 110
" 252 5.234 0.035 5 5 132.94 0.89 132 140
" 253 5.359 " 5 5 136.12 " 135 145 " 345* 3.975 " 4 4 100.97 " 101 112
" 254 5.484 " 5 5 139.29 " 138 148 " 346* 4.100 " 4 4 104.14 " 104 115
" 255 5.609 " 5 5 142.47 " 140 150 " 347* 4.225 0.030 4 4 107.32 0.76 107 118
" 623* 4.313 " 4 4 109.54 " 109 120
" 256 5.734 " 5 6 145.64 " 145 155
" 348* 4.350 " 4 4 110.49 " 110 121
" 257 5.859 " 5 6 148.82 " 148 158
" 349* 4.475 " 4 4 113.67 " 114 125
" 258 5.984 " 6 6 151.99 " 150 160 " 350 4.600 " 4 5 116.84 " 116 128
" 259 6.234 0.040 6 6 158.34 1.02 158 170 " 860 4.625 " 117.48 " 117 130
" 260 6.484 " 6 6 164.69 " 165 175 " 351 4.725 " 4 5 120.02 " 120 131
" 261 6.734 " 6 7 171.04 " 170 180 " 861 4.750 " 120.65 " 121 132
" 262 6.984 " 7 7 177.39 " 177 185 " 352 4.850 " 4 5 123.19 " 123 134
" 263 7.234 0.045 7 7 183.74 1.14 183 195 " 862 4.875 0.037 123.83 0.94 124 135
" 264 7.484 " 7 7 190.09 " 190 200 " 353 4.975 " 5 5 126.37 " 125 137
" 265 7.734 " 7 8 196.44 " 195 205 " 863 5.000 " 127.00 " 127 138
" 266 7.984 " 8 8 202.79 " 200 210 " 354 5.100 " 5 5 129.54 " 129 140
" 267 8.234 0.050 8 8 209.14 1.27 208 220 " 864 5.125 " 130.18 " 130 141
" 268 8.484 " 8 8 215.49 " 215 225 " 355 5.225 " 5 5 132.72 " 132 143
" 269 8.734 " 8 9 221.84 " 220 230 " 865 5.250 " 133.35 " 133 145
" 270 8.984 " 9 9 228.19 " 225 235 " 356 5.350 " 5 5 135.89 " 135 146
" 271 9.234 0.055 9 9 234.54 1.40 235 245 " 866 5.375 " 136.53 " 136 148
" 272 9.484 " 9 9 240.89 " 240 250 " 357 5.475 " 5 5 139.07 " 138 150
" 273 9.734 " 9 10 247.24 " 245 255 " 867 5.500 " 139.70 " 140 151
" 274 9.984 " 10 10 253.59 " 250 265 " 358 5.600 " 5 6 142.24 " 142 153
" 275 10.484 " 10 10 266.29 " 265 275 " 868 5.625 " 142.88 " 143 155
" 276 10.984 0.065 11 11 278.99 1.65 275 290 " 359 5.725 " 5 6 145.42 " 145 156
" 277 11.484 " 11 11 291.69 " 290 300 " 869 5.750 " 146.05 " 146 158
" 278 11.984 " 12 12 304.39 " 300 315 " 360 5.850 " 5 6 148.59 " 148 160
" 279 12.984 " 13 13 329.79 " 330 340 " 870 5.875 " 149.23 " 149 162
" 280 13.984 " 14 14 355.19 " 350 365 " 361 5.975 " 6 6 151.77 " 150 165
" 281 14.984 " 15 15 380.59 " 380 390 " 644 6.100 0.040 6 6 154.94 1.02 155 168
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 15
Chart 50: inch & metric sizes
0.210 0.005 (5.33 0.13mm) Diameter Section A 0.275 0.006 (6.99 0.15mm) Diameter Section A
" 362 6.225 0.040 6 6 158.12 1.02 158 170 " 445* 7.975 0.045 8 8 202.57 1.14 202 220
" 645 6.350 " 6 6 161.29 " 160 172 " 445A 8.225 0.055 8 8 208.92 1.40 208 225
" 363 6.475 " 6 6 164.47 " 165 175 " 446 8.475 8 9 215.27 " 215 230
" 646 6.600 " 6 7 167.64 " 167 180 " 446A 8.725 " 8 9 221.62 " 220 240
" 364 6.725 " 6 7 170.82 " 170 182 " 447 8.975 " 9 9 227.97 " 225 245
" 647 6.850 " 6 7 173.99 " 174 185 " 447A 9.225 " 9 9 234.32 " 235 250
" 365 6.975 " 7 7 177.17 " 177 190 " 448 9.475 " 9 10 240.67 " 240 260
" 366 7.225 0.045 7 7 183.52 1.14 183 195 " 448A 9.725 " 9 10 247.02 " 245 265
" 367 7.475 " 7 7 189.87 " 190 200 " 449 9.975 " 10 10 253.37 " 250 270
" 368 7.725 " 7 8 196.22 " 195 210 " 449A 10.225 0.060 10 10 259.72 1.52 260 275
" 369 7.975 " 8 8 202.57 " 200 215 " 450 10.475 " 10 11 266.07 " 265 280
" 370 8.225 0.050 8 8 208.92 1.27 208 220 " 450A 10.725 " 10 11 272.42 " 270 290
" 371 8.475 " 8 8 215.27 " 215 230 " 451 10.975 " 11 11 278.77 " 275 295
" 372 8.725 " 8 9 221.62 " 220 235 " 451A 11.225 " 11 11 285.12 " 285 300
" 373 8.975 " 9 9 227.97 " 225 240 " 452 11.475 " 11 12 291.47 " 290 310
" 374 9.225 0.055 9 9 234.32 1.40 235 245 " 452A 11.725 " 11 12 297.82 " 295 315
" 375 9.475 " 9 9 240.67 " 240 255 " 453 11.975 " 12 12 304.17 " 300 320
" 376 9.725 " 9 10 247.02 " 245 260 " 648 12.225 " 12 12 310.52 " 310 325
" 377 9.975 " 10 10 253.37 " 250 265 " 454 12.475 " 12 13 316.87 " 315 330
" 378 10.475 0.060 10 10 266.07 1.52 265 280 " 649 12.725 " 12 13 323.22 " 320 340
" 379 10.975 " 11 11 278.77 " 275 290 " 455 12.975 " 13 13 329.57 " 330 345
" 380 11.475 0.065 11 11 291.47 1.65 290 305 " 650 13.225 0.070 13 13 335.92 1.78 335 350
" 381 11.975 " 12 12 304.17 " 300 315 " 456 13.475 " 13 14 342.27 " 340 360
" 382 12.975 " 13 13 329.57 " 330 340 " 457 13.975 " 14 14 354.97 " 350 370
" 383 13.975 0.070 14 14 354.97 1.78 350 370 " 458 14.475 " 14 15 367.67 " 365 385
" 384 14.975 " 15 15 380.37 " 380 395 " 459 14.975 " 15 15 380.37 " 380 400
" 385 15.955 0.075 16 16 405.26 1.91 400 420 " 460 15.475 " 15 16 393.07 " 390 410
" 386 16.955 0.080 17 17 430.66 2.03 430 445 " 461 15.955 0.075 16 16 405.26 1.91 400 420
" 387 17.955 0.085 18 18 456.06 2.16 455 470 " 462 16.455 " 16 17 417.96 " 415 435
" 388 18.955 0.090 19 19 481.46 2.29 480 500 " 463 16.955 0.080 17 17 430.66 2.03 430 450
" 389 19.955 0.095 20 20 506.86 2.41 505 525 " 464 17.455 0.085 17 18 443.36 2.16 440 460
" 390 20.955 " 21 21 532.26 " 530 550 " 465 17.955 " 18 18 456.06 " 455 470
" 391 21.955 0.100 22 22 557.66 2.54 555 575 " 466 18.455 " 18 19 468.76 " 465 485
" 392 22.940 0.105 23 23 582.68 2.67 580 600 " 467 18.955 0.090 19 19 481.46 2.29 480 500
" 393 23.940 0.110 24 24 608.08 2.79 605 625 " 468 19.455 " 19 20 494.16 " 495 510
" 394 24.940 0.115 25 25 633.48 2.92 630 650 " 469 19.955 0.095 20 20 506.86 2.41 505 525
" 395 25.940 0.120 26 26 658.88 3.05 655 675 " 470 20.955 " 21 21 532.26 " 530 550
" 471 21.955 0.100 22 22 557.66 2.54 555 575
0.275 0.006 (6.99 0.15mm) Diameter Section A " 472 22.940 0.105 23 23 582.68 2.67 580 600
" 473 23.940 0.110 24 24 608.08 2.79 605 625
50-425* 4.475 0.033 4 5 113.67 0.84 114 127 " 474 24.940 0.115 25 25 633.48 2.92 630 650
" 624* 4.516 " 4 5 114.70 " 115 128
" 475 25.940 0.120 26 26 658.88 3.05 655 675
" 426* 4.600 " 4 5 116.84 " 116 130
" 427* 4.725 " 4 5 120.02 " 120 135
" 428* 4.850 " 4 5 123.19 " 123 137 O rings for pipe fittings
" 625* 4.906 0.037 4 5 124.62 0.94 125 138 The chart below gives details of O rings for use with inch
" 429* 4.975 " 5 5 126.37 " 126 140 Unified Standard threads. The sizes are specified in SAE AS 568:
" 430* 5.100 " 5 5 129.54 " 130 145
" 431* 5.225 " 5 5 132.72 " 132 147
Aerospace Size Standard for O rings.
" 626* 5.297 " 5 5 134.54 " 135 148 James INCH SIZES METRIC CONVERSIONS (mm)
" 432* 5.350 " 5 5 135.89 " 136 150 Walker Diameter Inside Diameter Inside
" 433* 5.475 " 5 6 139.07 " 140 155 Number Section A Diameter B Section A Diameter B
" 434* 5.600 " 5 6 142.24 " 142 158
" 435* 5.725 " 5 6 145.42 " 145 160 50-901 0.056 0.003 0.185 0.005 1.42 0.08 4.70 0.13
" 436* 5.850 " 5 6 148.59 " 148 162 " 902 0.064 " 0.239 " 1.63 " 6.07 "
" 903 0.064 " 0.301 " 1.63 " 7.65 "
" 437* 5.975 " 6 6 151.77 " 150 165 " 904 0.072 " 0.351 " 1.83 " 8.92 "
" 872* 6.125 0.040 6 6 155.58 1.02 155 170 " 905 0.072 " 0.414 " 1.83 " 10.52 "
" 438* 6.225 " 6 6 158.12 " 158 172
" 627* 6.281 " 6 6 159.54 " 160 175 " 906 0.078 " 0.468 " 1.98 " 11.89 "
" 874* 6.375 " 6 6 161.93 " 162 178 " 907 0.082 " 0.530 0.007 2.08 " 13.46 0.18
" 908 0.087 " 0.644 0.009 2.21 " 16.36 0.23
" 439* 6.475 " 6 7 164.47 " 165 180 " 909 0.097 " 0.706 " 2.46 " 17.93 "
" 628* 6.563 " 6 7 166.69 " 166 181 " 910 0.097 " 0.755 " 2.46 " 19.18 "
" 876* 6.625 " 6 7 168.28 " 168 182
" 440* 6.725 " 6 7 170.82 " 170 185 " 911 0.116 0.004 0.863 " 2.95 0.10 21.92 "
" 878* 6.875 " 6 7 174.63 " 175 190 " 912 0.116 " 0.924 " 2.95 " 23.47 "
" 913 0.116 " 0.986 0.010 2.95 " 25.04 0.25
" 441* 6.975 " 7 7 177.17 " 177 192 " 914 0.116 " 1.047 " 2.95 " 26.59 "
" 880* 7.125 0.045 7 7 180.98 1.14 180 195
" 916 0.116 " 1.171 " 2.95 " 29.74 "
" 442* 7.225 " 7 7 183.52 " 183 200
" 882* 7.375 " 7 7 187.33 " 187 202 " 918 0.116 " 1.355 0.012 2.95 " 34.42 0.30
" 443* 7.475 " 7 8 189.87 " 190 205
" 920 0.118 " 1.475 0.014 3.00 " 37.47 0.36
" 884* 7.625 " 7 8 193.68 " 193 208 " 924 0.118 " 1.720 " 3.00 " 43.69 "
" 444* 7.725 " 7 8 196.22 " 195 210 " 928 0.118 " 2.090 0.018 3.00 " 53.09 0.46
" 886* 7.875 " 7 8 200.03 " 200 215 " 932 0.118 " 2.337 " 3.00 " 59.36 "
16 To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
Aerospace sizes to BS ISO 3601-1
A0028 2.8 x 1.8 2.80 " 0.110 " A0500 50 x 1.8 50.00 0.39 1.969 "
A0530 53 x 1.8 53.00 0.41 2.087 0.016
A0032 3.15 x 1.8 3.15 " 0.124 "
A0560 56 x 1.8 56.00 0.42 2.205 0.017
A0036 3.55 x 1.8 3.55 " 0.140 "
A0600 60 x 1.8 60.00 0.45 2.362 0.018
A0038 3.75 x 1.8 3.75 " 0.148 "
A0630 63 x 1.8 63.00 0.46 2.480 "
A0040 4 x 1.8 4.00 " 0.157 "
A0670 67 x 1.8 67.00 0.49 2.638 0.019
A0450 4.5 x 1.8 4.50 " 0.177 " A0710 71 x 1.8 71.00 0.51 2.795 0.020
A0490 4.87 x 1.8 4.87 " 0.192 " A0750 75 x 1.8 75.00 0.53 2.953 0.021
A0050 5 x 1.8 5.00 " 0.197 " A0800 80 x 1.8 80.00 0.56 3.150 0.022
A0052 5.2 x 1.8 5.20 " 0.205 " A0850 85 x 1.8 85.00 0.59 3.346 0.023
A0053 5.3 x 1.8 5.30 " 0.209 " A0900 90 x 1.8 90.00 0.62 3.543 0.024
A0056 5.6 x 1.8 5.60 " 0.220 " A0950 95 x 1.8 95.00 0.64 3.740 0.025
A0060 6 x 1.8 6.00 " 0.236 " A1000 100 x 1.8 100.00 0.67 3.937 0.026
A1060 106 x 1.8 106.00 0.71 4.173 0.028
A0063 6.3 x 1.8 6.30 " 0.248 "
A1120 112 x 1.8 112.00 0.74 4.409 0.029
A0067 6.7 x 1.8 6.70 " 0.264 "
A1180 118 x 1.8 118.00 0.77 4.646 0.030
A0069 6.9 x 1.8 6.90 0.14 0.272 0.006
A1250 125 x 1.8 125.00 0.81 4.921 0.032
A0071 7.1 x 1.8 7.10 " 0.280 "
A0075 7.5 x 1.8 7.50 " 0.295 " 2.65 mm 0.09 mm (0.104 in 0.004 in) Diameter Section A
A0080 8 x 1.8 8.00 " 0.315 " B0045 4.5 x 2.65 4.50 0.13 0.177 0.005
A0085 8.5 x 1.8 8.50 0.15 0.335 " B0053 5.3 x 2.65 5.30 " 0.209 "
A0088 8.75 x 1.8 8.75 " 0.344 " B0060 6 x 2.65 6.00 " 0.236 "
A0090 9 x 1.8 9.00 " 0.354 " B0069 6.9 x 2.65 6.90 0.14 0.272 0.006
A0095 9.5 x 1.8 9.50 " 0.374 " B0080 8 x 2.65 8.00 " 0.315 "
A0100 10 x 1.8 10.00 " 0.394 " B0090 9 x 2.65 9.00 0.15 0.354 "
A0106 10.6 x 1.8 10.60 0.16 0.417 " B0095 9.5 x 2.65 9.50 " 0.374 "
A0112 11.2 x 1.8 11.20 " 0.441 " B0100 10 x 2.65 10.00 " 0.394 "
A0118 11.8 x 1.8 11.80 0.17 0.465 0.007 B0106 10.6 x 2.65 10.60 0.16 0.417 "
A0125 12.5 x 1.8 12.50 " 0.492 " B0112 11.2 x 2.65 11.20 " 0.441 "
A0132 13.2 x 1.8 13.20 " 0.520 " B0118 11.8 x 2.65 11.80 0.17 0.465 0.007
A0140 14 x 1.8 14.00 0.18 0.551 " B0125 12.5 x 2.65 12.50 " 0.492 "
A0150 15 x 1.8 15.00 " 0.591 " B0132 13.2 x 2.65 13.20 " 0.520 "
A0160 16 x 1.8 16.00 0.19 0.630 " B0140 14 x 2.65 14.00 0.18 0.551 "
A0170 17 x 1.8 17.00 0.20 0.669 0.008 B0150 15 x 2.65 15.00 " 0.591 "
A0180 18 x 1.8 18.00 " 0.709 " B0160 16 x 2.65 16.00 0.19 0.630 "
A0190 19 x 1.8 19.00 0.21 0.748 " B0170 17 x 2.65 17.00 0.20 0.669 0.008
A0200 20 x 1.8 20.00 " 0.787 " B0180 18 x 2.65 18.00 " 0.709 "
A0212 21.2 x 1.8 21.20 0.22 0.835 0.009 B0190 19 x 2.65 19.00 0.21 0.748 "
A0224 22.4 x 1.8 22.40 0.23 0.882 " B0200 20 x 2.65 20.00 " 0.787 "
A0236 23.6 x 1.8 23.60 0.24 0.929 " B0212 21.2 x 2.65 21.20 0.22 0.835 0.009
A0250 25 x 1.8 25.00 " 0.984 " B0224 22.4 x 2.65 22.40 0.23 0.882 "
A0258 25.8 x 1.8 25.80 0.25 1.016 0.010 B0236 23.6 x 2.65 23.60 0.24 0.929 "
A0265 26.5 x 1.8 26.50 " 1.043 " B0250 25 x 2.65 25.00 " 0.984 "
A0280 28 x 1.8 28.00 0.26 1.102 " B0258 25.8 x 2.65 25.80 0.25 1.016 0.010
A0300 30 x 1.8 30.00 " 1.181 " B0265 26.5 x 2.65 26.50 " 1.043 "
A0315 31.5 x 1.8 31.50 0.28 1.240 0.011 B0280 28 x 2.65 28.00 0.26 1.102 "
A0325 32.5 x 1.8 32.50 0.29 1.280 " B0300 30 x 2.65 30.00 0.27 1.181 0.011
B0315 31.5 x 2.65 31.50 0.28 1.240 "
A0335 33.5 x 1.8 33.50 " 1.319 "
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 17
Aerospace sizes to BS ISO 3601-1
18 To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
Aerospace sizes to BS ISO 3601-1
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 19
Header
Aerospace sizes to BS ISO 3601-1
Inside diameter
BS ISO
Size B Tolerance B Tolerance
3601-1
B A nom. nom.
Size code
(mm) (mm) (mm) (in) (in)
7.00 mm 0.15 mm (0.276 in 0.006 in) Diameter Section A
E1650 165 x 7 165.00 1.03 6.496 0.041
E1700 170 x 7 170.00 1.06 6.693 0.042
E1750 175 x 7 175.00 1.09 6.890 0.043
E1800 180 x 7 180.00 1.11 7.087 0.044
E1850 185 x 7 185.00 1.14 7.283 0.045
E1900 190 x 7 190.00 1.17 7.480 0.046
E1950 195 x 7 195.00 1.20 7.677 0.047
E2000 200 x 7 200.00 1.22 7.874 0.048
E2060 206 x 7 206.00 1.26 8.110 0.050
E2120 212 x 7 212.00 1.29 8.346 0.051
E2180 218 x 7 218.00 1.32 8.523 0.052
E2240 224 x 7 224.00 1.35 8.819 0.053
E2300 230 x 7 230.00 1.39 9.055 0.055
E2360 236 x 7 236.00 1.42 9.291 0.056
E2430 243 x 7 243.00 1.46 9.567 0.057
E2500 250 x 7 250.00 1.49 9.843 0.059
E2580 258 x 7 258.00 1.54 10.157 0.061
E2650 265 x 7 265.00 1.57 10.433 0.062
E2720 272 x 7 272.00 1.61 10.709 0.063
E2800 280 x 7 280.00 1.65 11.024 0.065
E2900 290 x 7 290.00 1.71 11.417 0.067
E3000 300 x 7 300.00 1.76 11.811 0.069
E3070 307 x 7 307.00 1.80 12.087 0.071
E3150 315 x 7 315.00 1.84 12.402 0.072
E3250 325 x 7 325.00 1.90 12.795 0.075
E3350 335 x 7 335.00 1.95 13.189 0.077
E3450 345 x 7 345.00 2.00 13.583 0.079
E3550 355 x 7 355.00 2.06 13.976 0.081
E3650 365 x 7 365.00 2.11 14.370 0.083
E3750 375 x 7 375.00 2.16 14.764 0.085
E3870 387 x 7 387.00 2.23 15.236 0.088
E4000 400 x 7 400.00 2.29 15.748 0.090
20 To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
Chart 72: metric sizes
dynamic and static applications. Other sizes are not recommend- " 0186-24 18.6 0.25 19 23 16.5 23.4 19 25
" 0196-24 19.6 " 20 24 17.5 24.4 20 26
ed for dynamic duties. " 0206-24 20.6 " 21 25 18.5 25.4 21 27
" 0216-24 21.6 " 22 26 19.5 26.4 22 28
" 0246-24 24.6 " 25 29 22.5 29.4 25 31
All Chart 72 dimensions are in millimetres (mm).
" 0276-24 27.6 " 28 32 25.5 32.4 28 34
" 0296-24 29.6 " 30 34 27.5 34.4 30 36
" 0316-24 31.6 0.30 32 36 29.5 36.4 32 38
" 0346-24 34.6 " 35 39 32.5 39.4 35 41
B " 0356-24 35.6 " 36 40 33.5 40.4 36 42
" 0376-24 37.6 " 38 42 35.5 42.4 38 44
" 0396-24 39.6 " 40 44 37.5 44.4 40 46
A " 0416-24
" 0446-24
41.6
44.6
"
"
42
45
46
49
39.5
42.5
46.4
49.4
42
45
48
51
" 0456-24 45.6 " 46 50 43.5 50.4 46 52
" 0476-24 47.6 " 48 52 45.5 52.4 48 54
" 0496-24 49.6 " 50 54 47.5 54.4 50 56
O ring diameter section A and inside diameter B. " 0516-24 51.6 0.40 52 56 49.5 56.4 52 58
" 0546-24 54.6 " 55 59 52.5 59.4 55 61
" 0556-24 55.6 " 56 60 53.5 60.4 56 62
" 0576-24 57.6 " 58 62 55.5 62.4 58 64
" 0586-24 58.6 " 59 63 56.5 63.4 59 65
" 0596-24 59.6 " 60 64 57.5 64.4 60 66
" 0616-24 61.6 " 62 66 59.5 66.4 62 68
" 0626-24 62.6 " 63 67 60.5 67.4 63 69
" 0646-24 64.6 " 65 69 62.5 69.4 65 71
" 0676-24 67.6 " 68 72 65.5 72.4 68 74
" 0696-24 69.6 " 70 74 67.5 74.4 70 76
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 21
Chart 72: metric sizes
James Diameters Flange Groove Diameters James Diameters Flange Groove Diameters
Walker Inside Cyl. Internal Pressure External Pressure Walker Inside Cyl. Internal Pressure External Pressure
Number Dia. B C, T D V max W (H11) V (h11) W min Number Dia. B C, T D V max W (H11) V (h11) W min
" 1945-30 194.5 " 195 200 192 200 195 203
" 1995-30 199.5 " 200 205 197 205 200 208 8.4 0.15mm Diameter Section A
" 2095-30 209.5 " 210 215 207 215 210 218
" 2195-30 219.5 " 220 225 217 225 220 228 72-1441-84* 144.1 0.60 145 160 140 160 145 165
" 2295-30 229.5 " 230 235 227 235 230 238 " 1491-84* 149.1 " 150 165 145 165 150 170
" 1541-84* 154.1 " 155 170 150 170 155 175
" 2395-30 239.5 " 240 245 237 245 240 248 " 1591-84* 159.1 " 160 175 155 175 160 180
" 2445-30 244.5 " 245 250 242 250 245 253 " 1641-84* 164.1 " 165 180 160 180 165 185
" 2495-30 249.5 " 250 255 247 255 250 258
" 1691-84* 169.1 " 170 185 165 185 170 190
" 1741-84* 174.1 " 175 190 170 190 175 195
5.7 0.12mm Diameter Section A " 1791-84* 179.1 " 180 195 175 195 180 200
" 1841-84* 184.1 0.80 185 200 180 200 185 205
72-0443-57* 44.3 0.30 45 55 41 55 45 59 " 1891-84* 189.1 " 190 205 185 205 190 210
" 0453-57* 45.3 " 46 56 42 56 46 60
" 0493-57* 49.3 " 50 60 46 60 50 64 " 1941-84* 194.1 " 195 210 190 210 195 215
" 0523-57* 52.3 0.40 53 63 49 63 53 67 " 1991-84* 199.1 " 200 215 195 215 200 220
" 0543-57* 54.3 " 55 65 51 65 55 69 " 2041-84* 204.1 " 205 220 200 220 205 225
" 2091-84* 209.1 " 210 225 205 225 210 230
" 0553-57* 55.3 " 56 66 52 66 56 70
" 2191-84* 219.1 " 220 235 215 235 220 240
" 0593-57* 59.3 " 60 70 56 70 60 74
" 0623-57* 62.3 " 63 73 59 73 63 77 " 2291-84* 229.1 " 230 245 225 245 230 250
" 0643-57* 64.3 " 65 75 61 75 65 79 " 2341-84* 234.1 " 235 250 230 250 235 255
" 0693-57* 69.3 " 70 80 66 80 70 84 " 2391-84* 239.1 " 240 255 235 255 240 260
" 2491-84* 249.1 " 250 265 245 265 250 270
22 To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
Chart 17000: inch sizes
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 23
Header
Non-standard sizes
temperature limits below that of the cord 50 / 1.969 80 / 3.150 0.40 / 0.016
material. 80 / 3.150 120 / 4.724 0.50 / 0.020
24 To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
Complementary products
Header
Coloured materials
Where stocks of our precision-moulded
O rings are held by users in different
black-coloured materials, it can be
possible to select the wrong item for
a specific application and cause an
equipment malfunction.
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 25
Complementary products
O ring kits
These three boxed kits offer excellent
value for money in terms of quantity,
quality and convenience.
26 To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
General design notes
G
2
Figure 1
G
2
Non-standard housing diameters Cylinder and piston housing tolerances
IndividualGGrings can be stretched or It is important that tolerances on housing
squeezed very22 slightly to fit housing diameters for cylinders and pistons meet
Figure 2
diametersG that do not match the the requirements of the formulae given
At higher pressures, back-up rings may be dimensions2 specified on our O ring on page 29 (ie, dimensions C and D in
required to prevent O ring extrusion (see size charts. Figures 7 10).
page 12). Leakage problems often arise
Pressure
due to lack of initial squeeze, or the O The amount of allowable deformation Surface finish of metal parts
ring diameter section being too large for varies according to the application, as For maximum seal life the surface finish
its housing. Pressure follows: of metal parts in contact with an O ring
should not exceed:
lGroove in cylinder application:
Reciprocating applications
A maximum of 3 per cent squeeze l0.8m (32in) CLA or Ra for static
O rings marked with an asterisk (*) on
our charts can be used for both static and is acceptable on an O ring outside parts.
diameterG to fit a shaft diameter C l0.4m (16in) CLA or Ra for moving
light/medium reciprocating duties. Other 2 covered by JW chart sizes.
sizes are not recommended for these that is not parts.
dynamic applications. (See Figs
G 7 & 8, page 29.)
2
A finish finer than 0.15m (6in) should
lGroove in piston application: be avoided in dynamic applications as a
Rotary applications
O rings may be used for rotating A maximum of 4 per cent stretch lubricating film may not be retained. For
applications where peripheral speeds are is acceptable on an O ring inside details of these finishes, please refer to
low. Please contact our Technical Support diameter to fit a cylinder diameter BS 1134: Assessment of surface texture.
Team for recommendations. D that is not covered by JW chart sizes.
(See Figs 9 & 10, page 29.) Diametral clearance G
Under no circumstances should the
lFlange and triangular groove maximum total diametral clearance
applications: A maximum of 2 per (G max) indicated on our housing tables
cent stretch is acceptable on an (pages 30-31) be exceeded. This is
O ring inside diameter when the seal to ensure that, if complete shaft offset
is used on an external pressure flange, occurs, the maximum extrusion gap at
or housed in a triangular groove. any point on the O ring does not
(See Fig 12, page 29.) exceed G.
Likewise, a maximum of 1 per cent
squeeze is acceptable on an O ring
outside diameter when the seal is used
on an internal pressure flange.
(See Fig 11, page 29.)
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 27
General design notes
G
2G
2 lAlways store O rings under
conditions that meet the requirements
of BS ISO 2230: Rubber products
Guidelines for storage, or BS F 68:
Pressure
Pressure Controlled storage of vulcanised
rubbers for use in aerospace
applications.
Figure 4
G
2G
2
28 To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
Product : Date : Drawn by : Sketch reference :
JAMES WALKER S.P.S. Ltd 'O' Rings 10th August 2011 Ian Harland ORing - 001
Marcoms Department
Housing design
Description :
'O' Ring ; Housing design details
Figure 5:
Figure 5: 'O'
Figure
'O'Ring5: 'O' Figure
Ring Ring 5: 'O' Ring FigureFigure
9: Groove
Figure
9: 9:
in Groove
piston.
Figure
Groove ininpiston.
9:
piston. Figure 13: Figure
Groove in piston. Groove 13:
in Groove
Figure flange
Figure
13: (Chart
in
13:
Grooveflange
Groove
72 flange
in only)
(Chart
in flange
72 only)
(Chart
(Chart 72 only)
72 only)
Figure 6: Groove corner radiiB and sideB tapers B Min. Lead-inMin.
Lead-in Min. Lead-in W W W
B Min. Lead-in W
(Applicable to Figures 7 to 13) (Max groove(Max
+ groove
2A max+(Max
+G)2Agroove
max +
G)+ 2A max + G)
V V V
(Max groove + 2A max + G) E
V
Figure 14: Triangular groove
0 - 5 Cylinder :Cylinder
D : DCylinder : D
A A A Cylinder : D H H H : R Max.
Radius
A F F F 15 - 20 15 - 20 15 - 20 H
45
R1 R2 F 15 - 20
Figure 6: Groove
Figure 6:
corner
Groove
radii
corner
Figure and
6: side
radiitapers
Groove and side
corner tapers
radii and side tapers M
(Applicable (Applicable
to Figures 7toto(Applicable
Figures
13) 7 toto13)
Figures 7 to 13) G/2 ** G/2 **
Figure 6: Groove corner radii and side tapers E E E L
Figure 14: Figure
Triangular
14: Triangular
groove
Figure 14:groove
Triangular groove
0 - 57 to 13)
(Applicable to Figures 0 - 5 0 - 5
Groove inside E Radius : R Max. Radius : R Max.
Radius : R Max.
Figure 7: Groove in cylinder. Max = Min Cyl/bore - 2F Min Figure 14: Triangular groove
0 - 5 45 45 45
R1 Min. Lead-on
R1 R2 R1 R2 R2 Min = Max Cyl/bore - 2F Max Radius : R Max.
(Max groove - 2A max - G) M M M 45
G/2 ** G/2 **
** Components concentric
G/2 ** G/2 ** G/2 ** G/2 ** T
R1 R2 L L L
F 15 - 20 G/2 ** G/2 **
Groove insideGroove
inside Groove
inside M
Figure 7: Groove
Figure 7:in Groove
cylinder.
Figurein7:
cylinder.
Groove in cylinder. G/2
Max
**
Figure 10: =Plug
= Min Cyl/bore
Max groove
-Cyl/bore
Min 2F Max
Min=Min -in
2F
G/2 ** - 2F Min
piston.
Cyl/bore
Min ** Components concentric L
Min. Lead-onMin.
Lead-on Min. Lead-on Terminology
Min = Max Cyl/bore
Min = Maxas for
-Cyl/bore
2F Min Figures
Max= Max
- 2F 6Max
and 9 - 2F Max
Cyl/bore
(Max groove(Max
- 2A
groove -(Max
max - 2A groove
G) - 2A max - G)
max - G)
** Groove
** Components Componentsinside
concentric
** concentric
Components concentric T T T
Figure 7: Groove in cylinder. Max = Min Cyl/bore - 2F Min
Min. FLead-on F 15 - 20 F15 - 20 15 - 20 Min = Max Cyl/bore - 2F Max G/2 ** G/2 ** Figure
G/2 ** 15:
G/2Dovetail
** G/2groove
** G/2 **
(Max groove - 2A max - G) E Figure 10: Figure
Plug groove
10: Plug
Figure
in piston.
groove10: Plug
in piston.
groove in piston. Groove centre ; A + B
** ** Components
** concentric
Components ** Components
concentric concentric
Terminology as Components
Terminology
for Figures
as concentric
Terminology
6forand
Figures
9 as
6 and
for Figures
9 6 and 9 T
F 15 - 20 G/2 ** G/2 **
Figure 10: Plug groove in piston. Figure 15: Figure
Dovetail
15:groove
Dovetail
Figure 15: Dovetail groove X
groove
Shaft : C E E E ** Components concentric
Terminology as for Figures 6 and 9 Groove centre
Groove
; Acentre
+ B Groove
; A + centre
B ;A+B
G/2 ** G/2 **
X X X
Figure 11: Groove in flange (Internal pressure) Figure 15: Dovetail groove
Shaft : C Shaft : C Shaft : C
Groove outside E Q : H11 Groove centre ; A + B
Y ; (Intersections)
Max
G/2 ** = Min
G/2Shaft/rod
** +**2FG/2
G/2 Max** G/2 ** G/2 **
Figure 11: Figure
Groove11:in Groove
flange
Figure(Internal
in Kpressure)
11:flange
Groove
(Internal
in flange
pressure)
(Internal pressure)
Min = Max Shaft/rod + 2F Min
Groove outside
Groove outside Groove
outside Q : H11 Q : H11 Q : H11 X
** Components concentric H Y ; (Intersections) Y ; (Intersections)
Y ; (Intersections)
Max = Min Shaft
Shaft/rod
Max = Min
:CShaft/rod
+ 2F
MaxMax
= Min
+ 2F
Shaft/rod
Max + 2F Max Figure 16:
K K K
Min = Max Shaft/rod
Min = Max Shaft/rod
+ 2F
MinMin
= Max
+ 2F
Shaft/rod
Min + 2F Min
Dovetail groove corner radii and side tapers
G/2 ** **
8:Components
** Components
concentric G/2 **
**concentric
Components concentric (Applicable to Figure
16: 15)
Figure Plug groove in cylinder. H H H
Figure 16: Figure 16: Figure
Terminology as for Figures 6 and 7. Figure 11: Groove in flange (Internal pressure) Dovetail groove
Dovetail
corner
groove
Dovetail
radii
corner
andgroove
side
radiitapers
and
cornerside
radii
tapers
and side tapers
Groove
Figure 8: Plug
Figure outside
groove
8: Plug
in 8: Plug
Figure
cylinder.
groove in cylinder.
groove in cylinder. Direction of pressure Q : H11 (Applicable (Applicable
to Figure
Y Max.15)togroove
(Applicable
; (Intersections) 20 -25
Figure 15) to Figure 15)
Max = Min Shaft/rod
TerminologyTerminologyas+Terminology
as for Figures 62F Max
forand
Figures
7. as6 and
for Figures
7. 6 and 7. base corner
K 20 -25 20 -25 20 -25
Min = Max Shaft/rod + 2F Min Direction of Direction
pressure of pressure
Direction of pressure Max. grooveMax. grooveradii:Max.
2G groove
Figure 12: Groove in flange (External pressure) base cornerbase corner base corner
** Components concentric H P12:
h11
Figure 12: Figure
Groove12:
in Groove
flange
Figure(External
in flange
Groove
pressure)
(External
in flange
pressure) radii: 2G
(External pressure) radii: 2G Figure
radii:16:
2G
P h11 P h11K P h11 Dovetail groove corner radii and side tapers
Figure 8: Plug groove in cylinder. K K K (Applicable to Figure 15)
H
Terminology as for Figures 6 and 7. H H H Groove entrance 20 -25
Direction of pressure Groove entrance Max.
Groove entrance
corner groove
Groove
radii: entrance
basecorner
corner radii:corner radii: cornerradii:
Min. G / Max. 2G
Figure 12: Groove in flange (External pressure) Min. G / Max.
Min.2GG / Max. Min.
2G G
radii: /
2G Max. 2G
Direction
Direction of P h11 of
Direction
pressure of pressure
pressure
Direction of pressure
K
Housing
Housing surface
Housing
surface finish
surface finish
Housing requirements.
requirements.
finish
surface
requirements.
finish requirements.
H forapplications
TheThe following
following The
details
following
details for
for surface
details
The following
surface finish
for surface
are
finishdetails
applicable
arefinish
for are
surface
for
applicableapplicable
general
finish
for are
duty
for general
applicable
generalapplications
dutyduty only
general
for aduty
applications range
only
onlyapplications
of
forStandard
for aa range
range
only
of
JW
ofStandard
for
Materials.
a range
Standard JWofJW
Materials.
Standard JW Materials.
Materials.
For specialised
For specialised
applications
For
applications
ie,specialised
cryogenicie,and
applications
cryogenic
light gases
and
ie, cryogenic
please
light gases
consult
and
please
light
JW Technology
consult
gases please
JW Technology
Centre
consult
forJW
advice
Centre
Technology
and
for recommendations.
advice
Centre
andfor
recommendations. Groove entrance
advice and recommendations.
For specialised applications ie, cryogenic and light gases please consult JW Technology Centre for advice and recommendations.
corner radii:
Elastomer
Elastomer
(rubbersElastomer
(rubbers
& polyurethanes)
&(rubbers
polyurethanes)
materials
& polyurethanes)
materials materials Thermoplastic
Thermoplastic
(PTFEs
Thermoplastic
etc.)
(PTFEs
materials
Min. G etc.)
(PTFEs
materials
/ Max. 2G etc.) materials
Elastomer (rubbers & polyurethanes) materials Thermoplastic (PTFEs etc.) materials
Static Static Static DynamicDynamic
** **Dynamic ** Static *** Static *** Static *** DynamicDynamic
*** ***
Dynamic ***
Static
Should not exceed
Should 0.8
not m
exceed
Should
Ra (32
0.8not
in
mexceed
CLA). Should
Ra (320.8
inm not
CLA).
Ra exceed
Should
(32 Dynamic
0.4
not
in CLA). m
exceed
Should
Ra (16 **exceed
0.4not
in
m CLA).
Ra (160.4Direction
inm
CLA).
0.1 ofin
Rato(16
0.8 pressure
m CLA).
0.1
Rato(4
0.8
tom Static
32 Ra
in
0.1 (4
CLA).
to to ***
0.832
minRa (4 to0.1
CLA). 32toin
0.3 m
0.1Ra
CLA). to(4
0.3
to12
min
Ra Dynamic
0.1CLA).
(4
to to12
0.3 m
inRa (4***
CLA). to12 in CLA).
Should not exceed 0.8 m Ra (32 in CLA). Should not exceed 0.4 m Ra (16 in CLA). 0.1Surface
to 0.8 m 0.1 to 0.3 m Ra (4 to12 in CLA).
** In **
dynamic In dynamic **
applicationsapplications
a In
surface
dynamic
finish
a applications
surface
finer than
finish0.15
a finer
surface
mthan
Ra
finish
0.15
(6 in
finer
mCLA)
than
Ra (60.15 m Ra***
in CLA) (6 in CLA)***
Surface finishes ***Ra
finerfinishes
than
(4m
Surface
0.1
tothan
finer
32 in
finishes
Ra (40.1
CLA).
in
m
finer
CLA)
Rathan
(4
must
in
0.1be
CLA)
mavoided,
Ramust
(4 in
be
particularly
CLA)
avoided,
mustparticularly
be avoided, particularly
must be avoided,
** In dynamic must be
as avoided,
a stable
applications a mustlubricating
asbe
surfacea stable
avoided,
finishfilm
lubricating
as
may
finer athan
stable
notfilm
be
0.15 m
Housing surface finish requirements.
lubricating
may
established.
not Ra
be
film
established.
(6may
innot be established.
CLA) in dynamic
***applications,
in dynamicfinishes
Surface applications,
asinadynamic
stable
finerlubricating
asapplications,
a stable
than 0.1film
lubricating
m as
may
a stable
Ra not
(4 film
belubricating
in may
established.
CLA)notmust
befilm
established.
mayavoided,
be not be established.
particularly
The following details for surface finish are applicable for general duty applications only for a range of Standard JW Materials.
For must
full details
Foravoided,
be full
of details
these
Forasurface
as of
full
these
details
stable finishes
surface
of these
lubricating please
finishes
filmsurface
mayrefer
please
notfinishes
to
be BSrefer
1134:
please
to BS
established. Assessment
refer
1134:to Assessment
BS of1134:
surface
Assessment
oftexture
surface
in dynamic of
texture
surface
applications, astexture
a stable lubricating film may not be established.
For specialised applications ie, cryogenic and light gases please consult JW Technology Centre for advice and recommendations.
For full details of these surface finishes please refer to BS 1134: Assessment of surface texture
Elastomer (rubbers & polyurethanes) materials Thermoplastic (PTFEs etc.) materials
Static Dynamic ** Static *** Dynamic ***
To order
Should not exceed or(32
0.8 m Ra getinfurther details,
CLA). Should call your
not exceed 0.4 mlocal
Ra (16contact
in CLA). shown
0.1 toon
0.8 rear
m Racover
(4 to 32 or 0.1 to 0.3 m Ra (4 to12 in CLA). 29
listed at www.jameswalker.biz
in CLA).
** In dynamic applications a surface finish finer than 0.15 m Ra (6 in CLA) *** Surface finishes finer than 0.1 m Ra (4 in CLA) must be avoided, particularly
must be avoided, as a stable lubricating film may not be established.
Header design
Housing
Figures in red relate to BS 1806, BS 4518 and BS 5106. Please contact our Technical Support Team for housings to BS ISO 3601-2
Fluid power systems O rings Part 2: Housing dimensions for general applications.
Metric Groove Dimensions All dimensions in millimetres.
Diameter Groove Width E Radial Diametrical Flange Groove Triangular Groove Groove Radii Dovetail Groove
Section Depth Clearance
A Oring only +1 back-up +2 back-up F G max Depth H K min L min Chamfer M R max R1 max R2 Depth X Width Y
2.0 2.6/2.7 4.1/4.2 5.6/5.7 1.72/1.79 0.12 1.6/1.7 2.8 4.0 2.71/2.83 1.0 0.4 0.12/0.24 1.65/1.72 1.70/1.77
2.4 3.2/3.4 4.6/4.8 6.0/6.2 1.97/2.09 0.14 1.7/1.8 3.7 5.0 3.30/3.42 1.3 0.5 0.20/0.40 1.96/2.04 2.05/2.13
2.5 3.2/3.3 4.7/4.8 6.2/6.3 2.17/2.25 0.13 2.0/2.1 3.4 5.0 3.46/3.59 1.3 0.5 0.13/0.26 2.05/2.13 2.15/2.23
2.62 3.5/3.7 5.0/5.1 6.5/6.6 2.31/2.39 0.13 2.1/2.3 3.6 6.4 3.68/3.81 1.0 0.8 0.13/0.25 2.16/2.24 2.26/2.34
3.0 4.0/4.2 5.4/5.6 6.8/7.0 2.50/2.65 0.15 2.2/2.3 4.5 6.0 4.20/4.32 2.0 1.0 0.20/0.40 2.46/2.55 2.58/2.67
3.5/3.53 4.7/4.9 6.2/6.4 7.7/7.9 3.10/3.18 0.15 2.8/3.0 4.8 7.9 4.95/5.08 1.5 0.8 0.13/0.25 2.89/2.99 3.03/3.13
4.0 5.1/5.3 6.6/6.8 8.1/8.3 3.52/3.62 0.15 3.2/3.4 5.5 8.0 5.75/5.90 2.0 0.8 0.15/0.30 3.32/3.42 3.48/3.58
4.1 5.5/5.7 7.1/7.3 8.7/8.9 3.50/3.67 0.16 3.1/3.2 6.0 8.0 5.60/5.72 2.5 1.0 0.20/0.40 3.39/3.50 3.59/3.70
4.5 5.8/6.0 7.6/7.8 9.4/9.6 3.96/4.07 0.16 3.7/3.9 6.0 9.0 6.45/6.61 2.3 0.9 0.16/0.32 3.74/3.85 3.92/4.03
5.0 6.4/6.6 8.2/8.4 10.0/10.2 4.42/4.54 0.16 4.1/4.3 6.7 10.0 7.18/7.34 2.5 1.0 0.16/0.32 4.23/4.35 4.37/4.49
5.33 7.0/7.2 8.8/9.0 10.6/10.8 4.67/4.78 0.18 4.3/4.5 7.1 11.1 7.49/7.62 2.3 0.8 0.13/0.25 4.54/4.67 4.64/4.77
5.7 7.5/7.7 9.3/9.5 11.1/11.3 4.95/5.18 0.18 4.4/4.5 8.1 10.0 7.80/7.92 3.0 1.0 0.20/0.40 4.80/4.94 4.98/5.12
6.0 7.8/8.0 9.6/9.8 11.4/11.6 5.31/5.45 0.18 5.0/5.2 7.9 12.0 8.64/8.82 3.0 1.2 0.18/0.36 5.02/5.16 5.25/5.39
6.99/7.0 9.4/9.6 12.0/12.2 14.6/14.8 6.22/6.35 0.20 5.9/6.1 9.4 14.3 10.03/10.16 2.5 0.8 0.13/0.25 5.85/6.01 6.12/6.28
8.0 10.7/10.9 13.3/13.5 15.9/16.1 7.09/7.27 0.20 6.7/6.9 10.6 16.0 11.61/11.81 4.0 1.6 0.20/0.40 6.70/6.88 7.01/7.19
8.4 11.0/11.2 13.6/13.8 16.2/16.4 7.50/7.75 0.20 6.6/6.7 12.0 14.0 11.50/11.62 4.0 1.0 0.20/0.40 7.02/7.21 7.34/7.53
9.0 12.3/12.5 15.6/15.8 18.9/19.1 7.97/8.17 0.21 7.5/7.7 12.1 18.0 13.08/13.29 4.5 1.8 0.21/0.42 7.54/7.74 7.89/8.09
9.5/9.53 13.1/13.3 16.4/16.6 19.7/19.9 8.43/8.64 0.22 8.0/8.2 12.7 19.0 13.83/14.05 4.8 1.9 0.22/0.44 7.97/8.18 8.34/8.55
10.0 13.8/14.0 17.1/17.3 20.4/20.6 8.89/9.10 0.23 8.4/8.6 13.3 20.0 14.58/14.81 5.0 2.0 0.23/0.46 8.41/8.62 8.80/9.01
12.5/12.7 18.5/18.8 21.8/22.1 25.1/25.4 11.13/11.39 0.26 10.5/10.8 17.4 25.0 18.30/18.56 6.3 2.5 0.26/0.52 10.52/10.78 11.01/11.27
0.094 .121/.126 .179/.184 .237/.242 .081/.084 .005 .075/.080 .129 .188 .129/.134 .047 .019 .005/.010 .077/.080 .080/.083
0.103 .136/.146 .194/.199 .252/.257 .091/.094 .005 .081/.091 .140 .250 .145/.150 .040 .030 .005/.010 .085/.088 .089/.092
0.125 .159/.164 .217/.222 .275/.280 .110/.114 .005 .102/.107 .168 .250 .183/.188 .063 .025 .005/.010 .103/.107 .107/.111
0.139 .183/.193 .241/.247 .299/.305 .122/.125 .006 .110/.120 .190 .313 .195/.200 .060 .030 .005/.010 .115/.119 .120/.124
0.188 .240/.246 .312/.318 .384/.390 .166/.171 .006 .155/.161 .248 .375 .269/.275 .094 .038 .006/.012 .156/.161 .163/.168
0.210 .276/.286 .348/.355 .420/.427 .184/.188 .007 .170/.180 .280 .438 .295/.300 .090 .030 .005/.010 .179/.184 .183/.188
0.250 .328/335 .430/.437 .532/.539 .221/.227 .007 .207/.214 .333 .500 .360/.367 .125 .050 .007/.014 .208/.214 .218/.224
0.275 .370/.380 .472/.480 .574/.582 .245/.250 .008 .231/.241 .370 .563 .395/.400 .100 .030 .005/.010 .230/.236 .241/.247
0.375 .514/.523 .644/.653 .774/.783 .333/.341 .009 .314/.323 .501 .750 .545/.554 .188 .075 .009/.018 .315/.323 .329/.337
0.500 .718/.728 .848/.858 .978/.988 .446/.456 .010 .421/.431 .674 1.000 .733/.743 .250 .100 .010/.020 .421/.431 .441/.451
Key: Chart 50 Chart 72 Chart 17000
# Diameter section A indicated is too small for this groove type.
These dimensions can be used only with moulded O rings. Use tables for Triangular groove sizes and Dovetail groove sizes on
page 31 for O rings manufactured by other methods.
30 To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz
Housing design
Trademark acknowledgements
James Walker acknowledges the following trademarks as mentioned
in this guide. All other names bearing the symbol are registered
trademarks of James Walker.
General information
Health warning: If PTFE or fluoroelastomer (eg, FKM, FFKM, FEPM) products are heated to elevated temperatures, fumes will be produced which may give unpleasant
effects, if inhaled. Whilst some fumes are emitted below 250C from fluoroelastomers or below 300C from PTFE, the effect at these temperatures is negligible. Care
should be taken to avoid contaminating tobacco with particles of PTFE or fluoroelastomer, or with PTFE dispersion, which may remain on hands or clothing. Material
Safety Data Sheets (MSDS) are available on request.
Information in this publication and otherwise supplied to users is based on our general experience and is given in good faith, but because of factors which are outside
our knowledge and control and affect the use of products, no warranty is given or is to be implied with respect to such information. Unless governed by type approval
or contract, specifications are subject to change without notice. Statements of operating limits quoted in this publication are not an indication that these values can be
applied simultaneously.
To ensure you are working with the very latest product specifications, please consult the relevant section of the James Walker website: www.jameswalker.biz.
Environmental statement: This brochure is manufactured using advanced environmentally friendly technologies and follows the strict environmental standard BS EN ISO
14001. Made from chlorine-free pulp (ECF) with post-consumer recycled fibre obtained from sustainable wood forests, and printed using vegetable-based inks, by Binfield
Printers Ltd. For those who wish to reduce further their impact on the environment, this publication is also available as a PDF from: www.jameswalker.biz.
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz 31
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ML011653 James Walker 2015