Oleodinamica Marchesini V0388 VBCD 1/4 SE A CC single counterbalance valve

Oleodinamica Marchesini V0388 is the VBCD 1/4 SE A CC single counterbalance valve, with a factory maximum operating pressure of 350 bar and mass of 1.010 kg.

The factory maximum flow is 25 l/min and the pilot-ratio designation is 1:4.5. The counterbalance element holds an overrunning load and meters its return flow when pilot pressure is applied.

This Type A closed-centre execution is described by the manufacturer as insensitive to back pressure and suitable for the illustrated series-actuator arrangement. Connect V1/V2 to supply, C1 to the free-flow actuator side and C2 to the side requiring load control. It is the 1/4" BSP version with body dimension L of 76 mm and catalogue dimension L1 of 134 mm.

The catalogue standard setting is 320 bar, separate from component maximum pressure and the actual setting of a delivered unit. The manufacturer specifies a setting at least 1.3 times load-induced pressure to permit closure at maximum load. This guidance does not generate a new order-code configuration.

The zinc-plated steel body contains hardened and ground steel parts with standard BUNA-N seals. The original factory hydraulic symbol and exact article drawing are retained in the local PDF. Where the manufacturer describes slight internal leakage, the component is not represented as a zero-leakage shut-off device.

The local technical PDF contains the complete relevant manufacturer spread, including the named article or accessory drawing. Neighbouring valve ratings and optional configurations apply only to the corresponding identified part. Any 50 °C oil temperature and 30 cSt viscosity beside curves are reference conditions.