Oleodinamica Marchesini V0726/V400 differential-area in-line relief valve

Oleodinamica Marchesini V0726/V400 is the VMPP L D5 3/4 differential-area in-line relief valve. Its original size row gives maximum flow 120 l/min and component pressure limit 350 bar. The supplier catalogue row identifies the adjustment execution but does not print the selected spring range. Its digits are retained as part of the offered article code, without inferring a numeric range or delivered preset. The adjustment is by handknob.

Connect P to the pressure line and T to tank. The manufacturer describes the P connection as reversible. The relief element opens at the adjusted setting to limit circuit pressure; this is a relief valve, not a pressure-reducing regulator.

The differential-area design has a slower opening response than the standard type but a more consistent setting as flow changes, according to the factory description. This does not mean pilot operation or pressure-compensated flow regulation.

The zinc-plated steel body, hardened and ground steel internals and standard BUNA-N seals follow the original family specification. Mass is a labelled reference for the base execution, not an independently weighed handknob or sealing-cap option. No delivered preset is inferred from a catalogue standard setting. The representative manufacturer family photograph may show a screw instead of the selected adjustment; the exact article and printed adjustment legend govern the execution.

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