Becker U Series pump has many seals inside it. This one is a seal ring gasket. It fits around shafts or between parts to create a tight seal. Its job is simple but very important. It stops oil leaks and air leaks.
This gasket is made of Viton. Viton is a special type of rubber . It is not like regular rubber. Here is what makes Viton better:
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It resists heat. Your pump gets hot when it runs. Regular rubber gets hard and cracks. Viton stays soft and flexible.
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It resists oil. The inside of your pump is full of oil. Viton does not swell or break down when it touches oil.
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It resists chemicals. Some applications have harsh chemicals. Viton handles them better than regular rubber .
This means a Viton gasket lasts longer and seals better than a standard rubber gasket.
We kept this simple. This Part# 300159 fits the following Becker pumps :
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U4.400
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U4.400D
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U4.630
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U4.630D

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