Oleodinamica Marchesini V0431/RP18 VBCD 3/4 DE RP 1:8 double counterbalance valve

Oleodinamica Marchesini V0431/RP18 (VBCD 3/4 DE RP 1:8) is an in-line double counterbalance valve with 3/4 inch BSP connections. The manufacturer lists a maximum flow of 105 l/min and a maximum pressure rating of 350 bar. These ratings identify separate selection limits; use the original performance curves and installation details to check the operating point.

This counterbalance arrangement controls an overrunning load in both directions. The factory pilot-ratio notation is 1:8. The catalogue standard setting is 320 bar; the manufacturer requires a valve setting at least 1.3 times the load-induced pressure. Check the actual setting and circuit conditions during selection and commissioning.

Connect V1 and V2 to the supply lines. Connect C1 and C2 to the two actuator service ports. The local drawing retains the original port layout and any article-specific geometric notes.

The body is zinc-plated steel with hardened and ground steel internal parts. The manufacturer specifies BUNA N seals. Reference curve conditions are 50 °C oil temperature and 30 cSt oil viscosity. The local reference includes the complete relevant manufacturer spread with its code table, hydraulic schematic, dimensions, curves and conditions.

Representative manufacturer product image for the VBCD DE series. Port size, dimensions and adjustment details depend on the exact article; use the original drawing and article table in the local technical PDF.