745-276567
Valve
Mack

High-reliability pressure control valve used in air systems of heavy-duty trucking applications. The valve regulates pressure within brake or suspension circuits, ensuring consistent operation and protection against over-pressurization. The body is machined from corrosion-resistant alloy and features hard seals rated for temperature extremes and moisture exposure. The compact form allows installation in tight plumbing runs, while sealed ports minimize leaks and reduce maintenance needs. Screw-adjustable or pre-set configurations enable fleets to tailor performance to vehicle weight and load, yielding more predictable brake response and a steadier ride. The device supports quick diagnostics with standard fittings and port locations that align with OEM diagrams, helping technicians locate and verify function during inspections. Proper torque and leak-testing practices maximize performance and service life. In service, it contributes to overall braking system reliability, reduces downtime due to air leaks, and enhances driver confidence on long hauls. Source One Parts Center can supply a reliable replacement that fits without modification.