Push-pull valves are normally-closed, on/off control valves used to release the parking brakes on air brake vehicles as well as control other accessory systems. They generally have a predetermined release pressure setting that will cause the valve to "pop off" if system pressure drops too low.
These valves are usually found on the dashboard in the cab of the truck.
Bendix 102087 Pin and Button Kit for PP-1 Valves
Bendix K095876 MV-3 Control Module, 1/4"-20 Holes, Includes Fitting for Aux Port (Special Order)
Bendix 800530 MV-3 Control Module, 1/4"-20 Threaded Mounting Holes
Part# 060-800530 Free Shipping
Haldex KN20001 On/Off Non-Automatic Two Position Flipper Valve, 1/8" NPT Ports
Bendix K031485 MV-3 Dash Valve, 3/8" PTC 90 Degree Elbows, 1/4"-20 Mounting Holes
Part# 060-K031485 Free Shipping
KN20031PTP Push-Pull Panel Mount Valve, 25-35 PSI Automatic Release Pressure
Haldex KN20033 Push-Pull Panel Mount Valve, 7-17 PSI Auto Release Pressure