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Terminology
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| Ød
h
ØW
L |
Minor Diameter
Height of Seal, Wiper or Wear Ring
Wear Ring Groove Diameter
Wear Ring Groove Length |
ØD
H
b
C |
Major Diameter
Height of Groove
Cup Base Thickness
Radial Cross-section |
Measuring Rod Wipers
|
| • Measure Ød
• Measure ØD
• Measure H or h |
*Measure the actual rod diameter itself
*Measure the groove diameter in the housing itself
*Make sure you specify which one you measured |
Measuring Rod Seals
|
| • Measure Ød
• Measure ØD |
*Measure the actual rod diameter itself
*Measure the groove diameter in the housing itself |
Note: If you are unable to get a measurement for ØD, then as an alternative you can measure the heel of the seal. This should be measured on the non-pressure side of the seal, taking care to avoid any sealing lips.
|
| • Measure H or h |
*Make sure you specify which one you measured |
If your seal has incorporated wear rings, you should also do the following:
|
| • Measure L
• Measure ØW |
*This is measured axially on the non-working side
*Alternatively: Measure the wear rings radial cross-section |
Measuring Piston Seals
|
| • Measure Ød
• Measure ØD |
*Measure the actual bore diameter itself
*Measure the groove diameter in the piston itself |
Note: If you are unable to get a measurement for Ød, then as an alternative you can measure the heel of the seal. This can be measured at either end of the seal, taking care to avoid any sealing lips.
|
| • Measure H or h |
*Make sure you specify which one you measured |
If your seal has incorporated wear rings, you should also do the following:
|
| • Measure L
• Measure ØW |
*This is measured axially on the non-working side
*Alternatively: Measure the wear rings radial cross-section |
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