Excerpt from the clipper web site:

If it's high pressure you're dealing with (to 300 psi), you can look to our HP SEAL
which has been solving problems for years. It's built tough with a fluoro elastomer
sealing element, a strong metal case and a large, pressure activated, PTFE
anti-friction element. It has an impressive pressure times velocity factor of
300,000, and can be used in a broad range of equipment, in rotary or reciprocating
motion, at a cost less than many alternatives. 


 
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