Oleodinamica Marchesini V0737/300 VMPDI 3/8 six-port cross-line relief valve

Oleodinamica Marchesini V0737/300 is the VMPDI 3/8 six-port cross-line relief valve with the actual selected 80–300 bar spring range and standard screw adjustment. Its manufacturer base row specifies maximum flow 45 l/min, maximum operating pressure 350 bar and 3/8" BSP connections. The full supplier-selected code is recorded directly, rather than generated from the ordering options.

The two relief elements limit pressure in both actuator branches through crossed discharge. The manufacturer describes six connections: two inlets and four reversible outlets, allowing one valve to serve two cylinders. Connect the V1/V2 passages as shown, preferably near the actuator. It is distinct from two reliefs discharging to a common tank connection.

The body is zinc-plated steel with hardened and ground internals, standard BUNA-N seals and guided-poppet sealing with negligible leakage. The common base row gives mass reference 1.520 kg; this is not an independently weighed calibrated or handknob execution. No delivered preset is assumed from the catalogue spring table.

The local technical PDF retains the complete relevant original manufacturer spread, with its exact size row, spring or orifice legend, hydraulic diagram and drawing. Neighbouring executions apply only to their identified rows. Oil temperature 50 °C and viscosity 30 cSt beside curves are reference conditions, not operating limits.