Type 8 Ds Jan18

Type 8
Data Sheet
Features Summary
• Conical Spring
• 'O'-Ring Mounted
• Inserted rotary face
• Shaft directional dependant
• Designed to suit standard European fitting
dimensions
Product Description Performance Capabilities

Conical spring, 'O'-Ring Mounted, shaft directional Temperature:
dependant Seal with inserted Seal face. Very similar
to the Type 8DINS Seal, but with a stationary to suit Minimum Maximum
common European non-din housings. Nitrile -30°C +120°C
EP -40°C +140°C
Suitable for a wide variety of general, or even medium Viton® -30°C +180°C
and heavy duty applications through a choice of Seal
and Seat face materials. Type 8 is supplied with a Type 8
STD Stationary as standard or maybe ordered as a Seal Pressure: Up to 14 bar (203 psi)
only to fit a variety of Stationaries.
Important: These limits are the theoretical elastomer
or design limitations. For maximum theoretical operating
pressure for your specific size and application please refer
to calculation sheet within this data sheet. All performance
information given is for guidance only and is dependent on
material, operating and application factors that affect Seal
performance.
Standard Material Options

More material options are available - please contact Vulcan for more information if the material you require is not shown below.
Rotary Face Stationary Face Elastomers Springs Metal parts
M106K+ Carbon Ceramic Viton® 304 Stainless Steel 304 Stainless Steel
Reaction Bonded Reaction Bonded
EP
Silicon Carbide Silicon Carbide
Tungsten Carbide Tungsten Carbide Nitrile
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Mechanical Seals | FEP/PFA Encapsulated ‘O’-Rings | Gland Packing | Expanded PTFE Gasketing
UK/World: +44 (0) 114 249 3333 | USA: +1 952 955 8800 | www.vulcanseals.com | contact@vulcanseals.com
8-DS - Rev.3 - DEC 2017
Type 8
Data Sheet
2 5
L2 L1
D1 D3
DØ 1 2 3 4
1 Rotary Face 4 Conical Spring

2 'O'-Ring 5 Stationary Face
3 Retainer
Dimensional Data
Metric Shaft Size
D1 D3 L1 L2
DØ
10 19.20 19.00 15.50 6.60
12 21.60 21.00 15.50 5.60
14 24.60 23.00 15.50 5.60
15 24.60 24.00 15.50 6.60
16 28.00 26.00 17.50 7.50
18 30.00 29.00 18.50 8.00
19 31.00 31.00 20.00 7.50
20 35.00 31.00 20.00 7.50
22 35.00 33.00 21.50 7.50
24 38.00 35.00 23.00 7.50
25 38.00 36.00 24.50 7.50
26 40.00 37.00 24.50 8.00
28 42.00 40.00 24.50 9.00
30 45.00 43.00 24.50 10.50
32 48.00 46.00 28.00 10.50
33 48.00 46.00 28.00 11.00
35 52.00 49.00 28.00 11.00
38 55.00 53.00 31.00 10.30
40 58.00 56.00 34.00 10.80
42 62.00 59.00 35.00 12.00
43 62.00 59.00 35.00 12.00
45 64.00 61.00 36.50 11.60
48 68.40 64.00 42.00 11.60
50 69.30 66.00 43.00 11.60
55 75.40 71.00 47.00 13.30
58 78.40 76.00 50.00 13.30
60 80.40 78.00 51.00 13.30
65 85.40 84.00 52.00 13.00
70 92.00 90.00 54.00 13.00
75 99.00 98.00 55.00 14.00
80 104.00 100.00 58.00 15.00

8-DS - Rev.3 - DEC 2017
Type 8
Data Sheet
Maximum Operating Pressure Type 8 PV Chart

The PV chart shows the maximum operating pressures
of this Vulcan Seal type based on the Seal face materials
used. Different lines on the chart indicate different material
combinations, as shown underneath
It also assumes stable operation at the speeds shown

in the multiplier tables below, in a clean, cool, lubricating
and non-volatile fluid with an adequate flush rate.
To calculate the approximate maximum operating

pressure for a specific duty, multiply the pressure value
obtained from the chart opposite for a particular Seal
shaft size by the appropriate factors given in the tables
below.
Based on Carbon vs Ceramic

Based on Carbon vs Silicon Carbide
Application Conditions Face and Seat Materials

Criteria Multiplier Combination Multiplier
Product Fluid Lubricating fluids X 1.00 Carbon vs Ceramic x 0.50
Aqueous solutions / Water X 0.85 Carbon vs Reaction Bonded Silicon Carbide x 0.90
Temperature Below 70°C (158°F) X 1.00 Tungsten Carbide vs Tungsten Carbide x 0.50
71°C to 120°C (160°F to 248°F) X 0.85 Reaction Bonded Silicon Carbide vs Reaction Bonded x 0.50
Silicon Carbide
121°C to 175°C (250°F to 347°F) X 0.75
Over 176°C (349°F) X 0.60
Speed Up to 1750 R.P.M. X 1.00
1750 to 3600 R.P.M. X 0.80
Example Calculation for Type 8 Guidance Only
A. Shaft size: 1” therefore pressure is 14 bar (from PV Please note that due to the many operational and
chart) application variables that affect Seal performance,
B. Media: Water (multiplier = 0.85) the information given on this page is for guidance
C. Temperature: 50°C (multiplier = 1.00) only.
D. Speed: 1450 R.P.M. (multiplier = 1.00)
E. Face combination: Carbon vs Ceramic (multiplier = We therefore strongly recommend careful individual
0.50) testing and monitoring of all seals and related
equipment for any proposed application.
For this particular Type 8 Seal size, the calculation for
the approximate guidance maximum operating pressure Our policy is one of continuous technical and
would be: efficiency improvement. As such, all specifications
may be subject to change without prior notice.
A x B x C x D x E
14 bar x 0.85 x 1.00 x 1.00 x 0.50 = 6 bar

8-DS - Rev.3 - DEC 2017

Type 8 Ds Jan18

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Type 8

Product Description Performance Capabilities

Standard Material Options

Rotary Face Stationary Face Elastomers Springs Metal parts

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1 Rotary Face 4 Conical Spring

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Maximum Operating Pressure Type 8 PV Chart

It also assumes stable operation at the speeds shown

To calculate the approximate maximum operating

Based on Carbon vs Ceramic

Application Conditions Face and Seat Materials

Example Calculation for Type 8 Guidance Only

14 bar x 0.85 x 1.00 x 1.00 x 0.50 = 6 bar

Embrace Excellence - Vulcan Service, Quality and Value

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