Oleodinamica Marchesini V0738/V180 six-port cross-line relief valve

Oleodinamica Marchesini V0738/V180 is the VMPDI 1/2 six-port cross-line relief valve, with 1/2" BSP connections. Its original base row specifies maximum flow 70 l/min and maximum operating pressure 350 bar. The exact supplier type specifies a handknob but does not print the spring range. The suffix is preserved as offered; a selected range or delivered preset is not inferred from its digits. The adjustment is by handknob.

The two relief elements discharge into the opposite circuit branch, protecting the actuator or motor against pressure shocks. The manufacturer describes six connections: two inlets and four reversible outlets, allowing one valve to serve two cylinders. Connect the V1/V2 passages according to the original circuit, preferably near the actuator. No separate common tank port is assigned to this VMPDI circuit.

The standard BUNA-N seals and hardened, ground steel internals follow the original family specification. Any mass is explicitly a reference for the unsuffixed base execution. The supplier listing does not independently weigh the adjustment option or establish the delivered pressure preset. The representative manufacturer family photograph shows the standard body and may show a screw instead of the selected handknob or sealing-cap preparation; the exact adjustment is defined by the article and option legend.

The local PDF retains the complete relevant original manufacturer spread, including the size row, option legend, hydraulic diagram, curves and drawing. Adjacent executions apply only to their identified rows. Oil temperature 50 C and viscosity 30 cSt beside the curves are reference conditions, not operating limits.