Oleodinamica Marchesini V0447 VBCD 3/4 DE FL double counterbalance valve

Oleodinamica Marchesini V0447 is the VBCD 3/4 DE FL double counterbalance valve, with a factory maximum operating pressure of 350 bar and mass of 3.800 kg.

The factory maximum flow is 100 l/min and the pilot-ratio designation is 1:5.5. The counterbalance element holds an overrunning load and meters its return flow when pilot pressure is applied.

Connect the 3/4" BSP V1/V2 supply ports to the directional valve and flange C1/C2 directly to the actuator. The 13.5 mm C1/C2 bores are flange passages, not BSP threads. The V0447-only O-ring designation is 130; the 3043 designation shown for smaller valves does not apply to this row.

The factory drawing gives body L of 191 mm, catalogue dimension L1 of 304 mm, four 10.5 mm mounting holes and a 65 mm transverse mounting pattern. The B8500 base shown below the table is explicitly for V0385/V0424/V0434, so compatibility with V0447 is not inferred.

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.