Sealing ring, Copper, Becker, U Series, Part# 94802910000

This is a small ring made of soft copper. It sits between two metal parts inside your pump. When you tighten the bolts, the copper squishes and forms a perfect seal.

Think of it like the crush washer on your car’s oil drain plug. You tighten it once, and it seals tight. But if you reuse it, it leaks.

The same goes for your vacuum pump.

Copper is soft. It molds itself to the metal surfaces when you tighten the bolts. This creates a seal that rubber or paper gaskets cannot match.

Copper also handles heat well. It does not dry out or crack like rubber. It does not rot like paper. It just works.

This sealing ring fits many Becker U Series pump models :

• U4.165

• U4.165E

• U4.165F

• U4.190

• U4.190E

• U4.190F

• U4.250

• U4.250E

• U4.250F

If you have one of these pumps, this is the right ring for you.