Oleodinamica Marchesini V0500/180 VAU 1/2 DE OMP/OMR motor-mounted cross-line relief valve

Oleodinamica Marchesini V0500/180 is the VAU 1/2 DE OMP/OMR motor-mounted cross-line relief valve with the actual selected 10–180 bar spring range and standard screw adjustment. Its manufacturer base row specifies maximum flow 60 l/min, maximum operating pressure 350 bar and 1/2" BSP connections. The full supplier-selected code is recorded directly, rather than generated from the ordering options.

The assembly limits pressure in both hydraulic-motor branches by crossed discharge. It is intended for Danfoss OMP/OMR motors. Connect M1 and M2 to the motor and V1 and V2 to supply according to the original interface drawing. Compatibility with a named motor series does not mean every shaft, port or mounting variant has been independently checked.

The base execution is the double-acting relief arrangement. Brake-release /SF and anti-cavitation /AC variants are separate articles and are not inferred for this selected code.

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 1.752 kg; this is not an independently weighed calibrated or handknob execution. No delivered preset is assumed from the catalogue spring table.

The supplier headline says 30–180 bar, but its currently selected spring option and the manufacturer spring table both specify 10–180 bar. This profile follows the selected option and primary table rather than the inconsistent headline.

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.