AB2

description

• The air bleed valve permits easier pump priming and/or start-up under deadhead conditions.This valve is normally-open to permit oil and air (if present) to pass from inlet to outlet and directly back to the tank.Pressure in the spool center section is bled via spool clearance to the no-spring end of the spool.As pressure builds, it overcomes the spring, shifts the spool to close the inlet port and allows full pump flow to the circuit.