Plug valve VBCD series

hydraulicfor controlpilot

DOUBLE OVERCENTER VALVE FOR OPEN CENTER VBCD DOUBLE COUNTERBALANCE VALVE NOT COMPENSATED FOR IN-LINE INSTALLATION With the Oleoweb VBCD counterbalance valves it is possible to support a suspended load and control its movement by eliminating vibrations or too fast and dangerous lowering. Equipped with a valve body with BSPP-GAS threaded ports, the VBCD overcenter valves are designed to be installed in-line within the hydraulic system in compliance with the spaces available on the machine. The VBCD series valves are double descent and movement control valves (also known as overcenter). Their action blocks the load and controls its movement in both directions; and are therefore suitable for applications in which it is necessary to control the descent phase of a suspended load subjected to gravitational force and to guarantee stability in the actuator working position in the presence of bidirectional loads, as occurs for example in the reversible hydraulic motors. The pilot line manages the partial opening of the descent channel allowing control of the actuator movement and avoiding the phenomenon of cavitation. The valve also works as antishock valve in the presence of pressure peaks caused by impacts or excessive loads. For this to be possible, the return line on the distributor must be connected to the drain. The VBCD is a not-compensated valve and its use is therefore recommended in systems with DCV with an open center spool. The hydraulic sealing is a fundamental feature for the overcenter valves.