$4.06
This is the Viton O-ring, size 34 mm x 3 mm. It is part number 486516620. This ring fits several Busch R5 pump models including the 0160D, 0202D, 0250C, 0250D, 0302D, and 0160C . Made from tough Viton (FKM) rubber, it resists high heat and harsh chemicals. If your pump is leaking or losing vacuum, this small part makes a big difference. It is also included in major repair kits like BMK020 and BMKF016 .
Busch O-Ring Viton 34 X 3 mm Part# 486516620
Busch O-Ring Viton 34 X 3 mm Part# 486516620
This O-ring is made for specific Busch R5 pumps. Before you buy, check your pump model. This ring fits the following models :
Busch R5 0160D
Busch R5 0202D
Busch R5 0250C
Busch R5 0250D
Busch R5 0302D
Busch R5 0160C
Standard rubber works okay at room temperature. But vacuum pumps get hot. They also touch oils and chemicals. Standard rubber can harden, crack, and fail.
This O-ring is made from Viton (also called FKM or FPM). Here is why Viton is better for your pump:
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