802161
Air Compressor Breather Valve
Bendix

The breather valve for the air compressor is a critical venting component that protects the compressor and downstream lines from pressure imbalances and moisture ingress. VMRS 013-009-091 places it among air system venting and relief components, enabling precise maintenance planning and replacement control. Category 41452 situates it in the air compressor accessory family, widely used across heavy-duty trucks. The valve helps regulate internal pressure during compression cycles, reduces moisture buildup, and maintains consistent performance across temperature variations. In practice, technicians replace this valve during wide-temperature operation or after high-mileage service intervals to prevent pressure drops or pump inefficiencies. It often works with other air-end components, regulators, and dryers, contributing to overall system reliability. Compatibility with standard port sizes and thread patterns is typical, but verification before replacement ensures correct fit. This part plays a vital role in uptime, reducing downtime due to compressor faults and ensuring consistent air pressure delivery to safety-critical devices like service brakes and suspension components.