Quick view RVKN31000 - Pressure Protection Valve Open Operating PSI: 65 ± 8Close Operating PSI: 56 ± 8Inlet Port: 1/4" NPTOutlet Port: 1/4" NPTAccessory Port B: 1/4 - 18 ThreadAccessory Port C: 1/8 - 27 ThreadOEM Part Number: N15759DC Used to protect the air brake system from... Compare