Chevron ®

Universal seal for rods / glands

and pistons

Chevron® (known as Shallex® Typical applications

in some regions) is our • Hydraulic press (main rams and TEMPERATURE
universal multi-lip packing set drawback rams)
Temperature range - standard materials:
that is highly regarded for its • Hydraulic cylinder glands and piston
heads -20°C to 120°C (-4°F to 248°F)
long working life and ability to Temperature range - high performance materials:
operate under adverse • Hydraulic valves
Up to 260°C (500°F)
mechanical conditions. • Oil pipeline expansion glands.
• Reciprocating pumps (steam, water,
When used in split form it can provide major
boiler feed and oil)
downtime savings. This robust packing set PRESSURE
comprises a gland ring/female adapter, • Sludge pumps
header/male adapter, and one or more Maximum Pressure:
• Swivels
intermediate V-shaped rings. 42 MPa (6092 psi)
A scarf abutment is used when the seal is
supplied in split form. Media capabilities
• Mineral and synthetic hydraulic oils SURFACE SPEED
Product features • Fire resistant fluids Maximum Speed:
• D
 ouble-acting capabilities when fitted • Air 0.5 m/s (98.4 fpm)
back-to-back. • Water
• Recommended for safety critical duties
• Mineral and synthetic greases.
and adverse mechanical conditions. For operating conditions outside these
For other media please contact the parameters, please contact the
• Excellent extrusion and wear resistance.
James Walker Technical Team. James Walker Technical Team
• Options available to suit adjustable and
non-adjustable axial housing lengths.
• Available with self-aligning gland ring How supplied
for worn equipment Radial sections from 4 mm (1⁄6 in) upwards
• Good sealing integrity at low or Spring-loaded versions from 6.5 mm (1⁄4 in).
slack pressures Endless rings available up to 2.2 m (87 in) OD.
Endless packing sets in standard materials
to suit housings to BS ISO 5597— Long (L3)
axial length series are readily available.
Inch sizes and split packing sets are
also available.

Fitting & installation

Fitting instructions are supplied with
every seal.
Chevron ®

Universal seal for rods / glands

and pistons

Product features
Size range Ring description Standard materials High performance materials

High performance
Gland
Acetal copolymer
Up to &
including Cotton fabric proofed with a A range of solid rubbers
Intermediate
250 mm OD blend of synthetic rubbers
(9 4⁄5 inch) Synthetic fabrics proofed with
High performance hydrogenated nitrile (HNBR)
*Header
Acetal copolymer or Fluorocarbon (FKM) rubber
Cotton fabric proofed with a and others
Gland
blend of synthetic rubbers
Acetal, PEEK TM, PTFE,
Above Cotton fabric proofed with a UHMWPE, nylon etc.
Intermediate
250 mm blend of synthetic rubbers
(9 4⁄5 inch) A range of metals
Solid hard rubber, or cotton
*Header fabric proofed with a blend of
synthetic rubbers

* Non-standard — spring-loaded headers

Header rings produced from thermoplastics or metals can be supplied with multiple
open-coil springs to give a degree of compensation for wear and loss of interference of sealing rings.

Typical Housings Single acting piston application

Direction
of
pressure

Bearing
housings

Double acting piston application

Bearing housing

Bi-Directional

pressure

Rod application

Direction
of
pressure
Bearing housing Wiper housing
Chevron ®

Universal seal for rods / glands

and pistons
Leaflet : Date : Sketch reference :
JAMES WALKER S.P.S. Ltd. Hydraulic Sealing Products 10-02-2011 BS 5597 - SSH

Marcoms Department BS 5597 ; Design dimensional nomenclature ; Shaft / gland housing

Chevron® preferred housing designs Shaft/gland housing arrangement

Groove axial Edges to be rounded and

length : L burr free ; Max radius 0.50
Radius : R Max

20/30°

Groove radial Chamfer axial

E/2 ***
depth : S length : C Min
Nominal groove 20/30°
O/D : d1

Guidance fit Guidance fit

Ø : d ; H9** Ø : d1 ; f8** Shaft
Ø : d ; f8**

E/2 *** ; Radial clearances and extrusion gaps (Parts concentric) : See Machining Information Section.
1) Surface roughness / finish requirements : See Machining Information Section.
2) ** Tolerances in accordance with BS EN ISO 286 -1 and BS EN ISO 286 -2 : See Appendix V.
Leaflet : Date : Sketch reference :
JAMES WALKER S.P.S. Ltd. Hydraulic Sealing Products 10-02-2011 BS 5597 - PSH
Piston/cylinder
Marcoms housing arrangement
Department BS 5597 ; Design dimensional nomenclature ; Piston / cylinder housing

Groove axial Edges to be rounded and

length : L burr free ; Max radius 0.50
E/2 ***
Radius : R Max 20/30°

Groove radial Chamfer axial

depth : S length : C Min

20/30°
Nominal groove
I/D : D1
Cylinder Guidance fit Chamfer axial
Ø : D ; H9** Ø : D ; f8** Guidance fit length : C Min
Ø : D1 ; H9**

1) E/2*** ; Radial clearances and extrusion gaps (Parts concentric) : See Machining Information Section.
2) Surface roughness / finish requirements : See Machining Information Section.
3) ** Tolerances in accordance with BS EN ISO 286 -1 and BS EN ISO 286 -2 : See Appendix V
Chevron ®

Universal seal for rods / glands

and pistons

Chevron® preferred
Shaft Ø; d; f81) Cylinder Ø; D; H91) Housing
housing dimensions

Up to Up to Radial depth Axial length L

Above Above
& including & including S Nominal Tolerance
Metric sizes (mm)
6.00 8.00 N/A N/A 4.00 14.50

8.00 25.00 20.00 40.00 5.00 16.00

25.00 50.00 40.00 66.00 7.50 25.00

50.00 90.00 66.00 110.00 10.00 32.00

90.00 150.00 110.00 175.00 12.50 40.00 +0.25, - 0

150.00 300.00 175.00 330.00 15.00 50.00

300.00 500.00 330.00 540.00 63.00

20.00
500.00 900.00 540.00 940.00 73.00

900.00 > 940.00 > 25.00 95.00

Inch sizes (mm)
> 11⁄16 > 11⁄16 3⁄16 ½
11⁄16 1 11⁄16 1½ ¼ ¾
1 2 1½ 2 5⁄8 5⁄16 1

2 3½ 2 5⁄8 4¼ 3⁄8 1¼

3½ 6 4¼ 7 ½ 1¾ +0.010, - 0

6 16 7 17 ¼ 5⁄8 2

16 24 17 ¼ 25 ½ 2 7⁄8
¾
24 36 25 ½ 37 ½ 3¼

36 > 37 ½ > 1 3¾

Notes:
1) For existing applications, please refer to our Hydraulic sealing products — Size charts
2) For new applications housing dimensions are to be based on BS ISO 5597 — Long (L3) axial length series housings
3) E/2 ***: Radial clearances and extrusion gaps
4) Surface roughness and finish requirements
5) ** Tolerances in accordance with BS EN ISO 286 -1 and BS EN ISO 286 -2
James Walker
Worldwide
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T: +61 2 9721 9500 T: +91 224 0808080 T: +47 22 75 75 00
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Information given in this publication is given in good faith and represents the results of specific individual tests carried out by James Walker or third parties in accordance with the
methodologies described in this publication, performed in a laboratory. No representation or warranty is given in relation to such information. Values and/or operating limits given
in this publication are not an indication that these values and/or operating limits can be applied simultaneously. While such results may comprise useful additional information
and are industry standard tests, they are no substitute for conducting (or procuring from James Walker) your own tests and engineering analysis and satisfying yourself as to
the suitability of the product you select. Please also note that a product tested in accordance with the published methodology may not perform to such values in application
and/or under different test conditions or methodologies for a variety of reasons, including but not limited to the environment in which it is used/tested or which passes through it
or otherwise affects the product, or due to the handling, storage or installation, or due to the effect of housing or other parts. Our personnel will be happy to discuss any historical
examples we have of a product having been previously used in a particular application.
To ensure you are working with the very latest product specifications, please consult the relevant section of the James Walker website: www.jameswalker.biz.

James Walker Sealing Products & Services Ltd

Registered Office: Lion House, Oriental Road,
Woking, Surrey GU22 8AP, United Kingdom.
Reg no: 00264191 England

Issue number 1
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