$13.72
This small but important part is a Pfeiffer sealing ring, also known as a Dowty seal. The part number is 300216. It is made from tough FKM rubber and measures exactly 10.4 x 16 x 2 millimeters. If you have a Pfeiffer DUO 255M vacuum pump (Index C version), this seal helps stop leaks and keeps the pressure just right. Replace your old or worn seal with this one to keep your pump running strong.
Ring, Sealing, FKM, 10. 4x16x2 (Dowty seal), Pfeiffer, DUO, Part# 300216
Ring, Sealing, FKM, 10. 4x16x2 (Dowty seal), Pfeiffer, DUO, Part# 300216
This is the Sealing Ring (Part #300216) . It is a special type of seal called a Dowty seal. A Dowty seal is not a simple flat washer. It has a rubber ring inside a metal outer ring. When you tighten it, the rubber squeezes out just a little bit. That creates a very tight, very reliable seal that can handle both high pressure and vacuum. This seal is made for the Pfeiffer DUO 255M vacuum pump, specifically the Index C version . Always double-check your pump’s model tag before ordering.
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