Valve Spring for Gas Ballast – Part # 436525907 – vacstellar

This is the original spring, Part # 436525907. It’s made to the exact specifications for a perfect fit and reliable performance.

This little spring is key to that process. It controls the valve that lets the air in. A strong, correctly-tensioned spring ensures the valve operates at the right time and seals tightly when closed.

If this spring gets weak or breaks, the gas ballast won’t work properly. Moisture can build up inside your pump. This can contaminate the oil, cause corrosion, and reduce pumping power. Replacing a worn spring is a simple fix that prevents big problems.

This valve spring fits a wide range of popular Busch vacuum pump models, including the R5, Panther, and Cobra series.