Pressure Protection Valve

The pressure protection valve available from 4 State Trucks helps maintain air system integrity by allowing air to flow only after system pressure reaches the chosen threshold, protecting critical components in air brake and accessory circuits. You can choose between 3/8-inch inlet and 1/2-inch inlet configurations to match your existing airline fittings, and select the pressure range that suits your vehicle's requirements. Available closing/opening pressure options include 55-to-45 PSI, 65-to-55 PSI, and 85-to-67 PSI, all designed to engage at higher pressures and close at lower pressures to preserve tank air when demand drops. Each valve is sold individually and built to fit a wide variety of truck and trailer applications for dependable performance on the road.