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Non-ABS four port service relay valves in several configurations. Control Port (NPT) = 3/8'' Reservoir Port (NPT) = 1/2'' Delivery Ports (NPT) = 3/8'' Nominal Crack Pressure = 4.0 PSI
Used on Dolly & Trailer Park Brake Release Inlet Port (NPT) = 1/4'' Outlet Port (NPT) = 1/4'' Exhaust Port (NPT) = 1/4''
This valve is used on axles with service brake chambers only. It is commonly used on dollies, trailer turntables, and other axles exempt from spring brakes requirements.
This inline valve will pass and retain supply pressure to the delivery port until the supply pressure drops to less than half that of the delivery. Vents pressure quickly at the valve rather than the supply source. Holding feature retains delivery...
Auxiliary Supply (NPT) = 3/8'' Control Port (NPT) = 3/8'' Reservoir Port (NPT) = 3/4'' Delivery Ports (2) (NPT) = 3/8'' Nominal Crack Pressure = 4.5 PSI
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