Oleodinamica Marchesini V0318 VBCD 3/8 SE PB single counterbalance valve

Oleodinamica Marchesini V0318 is the VBCD 3/8 SE PB single counterbalance valve, listed for maximum flow of 40 l/min and maximum operating pressure of 350 bar.

The factory pilot-ratio designation is 1:4.25. The valve controls the return flow of an overrunning load and holds the actuator when the directional valve is idle. The check branch permits supply flow towards the actuator, while the pilot-operated counterbalance branch meters the returning load flow in the controlled direction.

This partially balanced single valve is intended for a closed-centre directional circuit. Connect V1/V2 to supply, C1 to the free-flow side of the actuator and C2 to the side requiring load control. The manufacturer describes the setting and pilot response as insensitive to back pressure in this circuit. All four pipe connections are 3/8" BSP.

The factory table gives height H of 55 mm and thickness S of 30 mm. No mass is provided for this article, so none has been inferred from an adjacent size.

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

The zinc-plated steel body contains hardened and ground steel parts with standard BUNA-N seals and negligible internal leakage as described by the manufacturer.

The local technical PDF retains the complete applicable original manufacturer spread, including the exact article table, hydraulic symbol and installation drawing. Where curves specify oil at 50 °C and 30 cSt, these are reference conditions rather than operating-temperature limits.