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Old 05-01-2021, 05:25 PM #1
Join Date: May 2021
CP regulator base seal material

Hi all

I'm wondering what is the material used for base seal in pressure adjustment piston in Custom Products pressure regulator. In photo below it is red:

And here I believe is older version, where seal is made from black material:

Is it some kind of urethane resin casted in there, or is it pressed in place? Why is there a hole in the middle?
I would really appreciate any info about this seal.
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Old 05-01-2021, 10:22 PM #2
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Join Date: Sep 2016
Location: Canada
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i believe its around a shore a 80 urathane thats pressed into the "seat holder". the hole is just a relief that kinda prevents suction. itll pull out with a dental pick.

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