KB21 Service Manual Pub 09-14
55
Cylinder Control Systems
40-A. Bucher L.8S Manual Control/Cable
Anti-Cavitation Check/Work Port Relief Operation
Both of the Swing Functions of the Control Valve utilize Work Port relief Valves which incorporate Anti-
Cavitation Check Valves (shown below)
Anti-cavitation check valves are used to supply make up oil from the return tank port to the cylinder
during gravity assisted operation of the cylinder. This prevents the possibility of the entry of air into
the circuit due to the negative pressure created while the cylinder is operating.
The negative pressure created by the movement of the cylinder overcomes the anti-cavitation spring
pressure and allows the oil at the tank port to travel through the work port relief piston to the cylinder
port. The image above shows the assembled components installed in a cutaway section of the valve.
To Next Page
Loading...