Oring Compression For Sealing

Oring Compression For Sealing FAQ

How much compression should an o ring have in a seal?

It is important, therefore, for O-ring volume to be larger than the cavity, allowing seal compression to block the diametrical gap, preventing leakage and providing 25% compression in the O-ring. Butyl rubber has been tested in face type O-ring seals using grooves that provided 15%, 30% and 50% compression.

What is o rings compression set?

Technical Handbook O-rings 12 J. Gland design for Kalrez®O-rings Compression set Compression set is essentially a measure of a seal’s ability to retain sealing force and, therefore, the capability to function. The degree of compression set will depend on the operating environment and, importantly, the duration of exposure.

How are o rings used as seals?

O-rings are normally used as seals in several ways, and dimensions of the groove or gland will also vary with the cross section of the ring, the type of operation, and the amount of pressure used in the system.

What is the best temperature for o rings and other compression seals?

For O-rings and other compression seals, however, the TR-10 value per ASTM D1329 provides a better Figure 2-25: Temperature Capabilities of Principal Elastomers Employed in Seals -100 -148 -75 -103 -50 -58 -25 -13 0 32 25 77 50 122 75 167 100 212 Temperature °C