The Bendix AD-IS® Governor and Check Valve Kit ensures you are Ready for the Road Ahead™, successfully protecting the air compressor as it reaches its pressure limit by unloading before reaching beyond max capacity. This heavy duty governor and check valve repair kit ensures the accumulated, settled oil and moisture at the air dryer’s base is successfully unloaded to keep your braking system in peak condition. FleetPride is your First Click in Heavy Duty®.