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SEAL SIZING
The following is a list of necessary measurements that are needed to manufacture your seal in a hurry!








Terminology


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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