Williams Controls 118365 Pressure Protection Valve (70 PSI)

Williams Controls 118365 pressure protection valve for heavy-duty truck air systems. Holds back auxiliary air consumers until supply reaches 70 PSI so the service brakes always get priority. Two 1/8-inch NPT ports, 150 PSI maximum operating pressure, -40°F to 180°F service range, FMVSS 121 compliant. Used on Class 6-8 trucks and trailers, including water-truck air-actuation systems.