Pressure Seals, Inc on Facebook

Don't see what you are looking for? Many other products available. Please use our quickquote form to inquire.

Quad Rings The QUAD P.E. Plus is a newly patented seal design that combines an injection-moldable thermoplastic bearing material with a QUAD-RING seal, o-ring, or specialized seal to form a self-lubricating seal and elastomeric spring for both rotary and reciprocating seal applications.

A tab on the thermoplastic ring locks it into the housing or shaft to prevent independent movement of the seal assembly. The ring is split to allow for thermal expansion of the shaft or cylinder.
Materials used for the custom-molded QUAD P.E. Plus seal can be specified from a wide range of rubber compounds and high performance thermoplastics.

The characteristically high pressure-velocity values and low coefficients of friction of thermoplastic bearing materials make them ideal for high velocity applications. These thermoplastics are also self-lubricating, which means that a QUAD P.E. Plus seal can be used in continuous applications without external lubrication, a condition that would cause other seals or packings to burn up quickly, or destroy the surface of the cylinder or shaft it was meant to protect. Versions of the QUAD P.E. Plus can withstand up to 1500 fpm (457.2 M/min) surface speed and temperatures up to 450OF (232ºC), with an operational life of more than 15 million cycles in a dry (non-lubricated) environment.
rotating shafts For rotating shafts
For rotary applications, the thermoplastic ring is split at an angle to allow for thermo-expansion of the metal surface. The thermoplastic ring can also be designed with a step-cut to minimize fluid flow-by.

Placed in the cylinder wall groove (on the O.D. of the thermoplastic ring), the rubber seal squeezes the rigid material snugly against the shaft. The tab on the thermoplastic ring fits into a slot in the housing and prevents the seal from rotating with the shaft.
angle and step cut

For linear stroking
In linear stroking applications, the rubber seal is installed in a groove on the piston (on the I.D. of the thermoplastic ring) and presses the thermoplastic ring firmly against the cylinder wall. In linear applications the ring is also split to compensate for thermal expansion.


Information Provided by Minnesota Rubber/Quadion Corporation, copyright 2002
Product names are Registered trademarks of Minnesota Rubber, A Quadion Company.