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Solutions for Installation Damage

Failure Pattern
Occurring in both static and dynamic seals, installation damage is marked by short cuts, notches, or a skinned or peripherally peeled surface.

Problem Sources
  • Sharp edges on mating components of the O-ring gland
  • Sharp threads over which the O-ring must pass during assembly
  • Insufficient lead-in chamfer
  • Oversize O-ring ID on piston
  • Undersize O-ring ID on rod
  • Twisting or pinching of O-ring during installation
  • No O-ring lubrication during installation
  • Low tear resistant elastomers such as Silicone

Suggested Solutions
  • Break all sharp edges
  • Cover threads with tubes or tape during O-ring installation
  • Provide a 15-20° lead-in chamfer
  • Install correctly sized O-rings and use lubrication during assembly

O-RING RULE OF THUMB #11

Static seal cross-sections are generally compressed from 10% to 40%, whereas dynamic seals are from 10% to only 30%. » Learn More

 
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Apple Rubber Products
310 Erie Street · Lancaster, NY 14086-9504 USA
1.800.828.7745 (US and Canada Only)
Phone: 716.684.6560 · Fax: 716.684.8302

1.800.828.7745 (US and Canada Only)