Description
This ring gasket, part number 300214, is made to seal specific areas inside the pump. It helps keep oil where it belongs and stops air from leaking in.
This gasket is used in several larger Pfeiffer pump models. It fits the DUO 250A, DUO 255M (Index C), and UNO 250A pumps . These are powerful industrial pumps used in demanding applications.
it is part of the PMK026 Overhaul Kit for the UNO 250A pump . It is also included in the PSK027 Seal Kit for the DUO 250A pump . That means it is a standard part that gets replaced during a full pump rebuild, typically every 2 to 4 years .
Gaskets like this one can wear out over time. Heat, pressure, and oil exposure can cause them to become hard or brittle. If you are already opening up your pump for service, replacing this ring gasket is a smart move. A fresh gasket ensures a tight seal and helps your pump run reliably.
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