$7.35
This is the Pfeiffer Part# 4070949, a small 8 mm x 2 mm O-ring made from high-quality Viton rubber . It is a replacement seal for Pfeiffer DUO 5 and DUO 5C vacuum pumps. Use this part to fix small leaks and keep your pump running smoothly.

O-ring, 8 x 2 mm - Viton, Part# 4070949

O-ring, 8 x 2 mm - Viton, Part# 4070949
This is the Pfeiffer O-ring, Part# 4070949. It looks small, but it plays a big role. It creates a tight seal inside your pump. Without a good seal, your pump cannot work right.
Exact Fit for Your Pfeiffer Pump
This O-ring is made to Pfeiffer’s exact factory size. It has an inside diameter of 8 mm. The thickness of the rubber is 2 mm .
Because it is a replacement part, it fits perfectly on these pump models:
Pfeiffer DUO 5
Pfeiffer DUO 5C
This is not a cheap rubber ring. It is made from Viton (also called FKM). This material is special because it can handle tough conditions.
Here is why Viton is the best choice:
Handles High Heat: Your pump gets hot during long work hours. Viton stays flexible and does not melt or harden.
Resists Chemicals: It stands up to pump oils, fuels, and other harsh fluids. It will not swell, crack, or break down.
Lasts Longer: Viton is much more durable than standard rubber. You will not need to replace it as often.
Better Seal: It stops air and gas from leaking through. This helps your pump reach a strong vacuum.
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10 in stock
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10 in stock
10 in stock
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