Oleodinamica Marchesini V0726/400 differential-area in-line relief valve

Oleodinamica Marchesini V0726/400 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 exact supplier type explicitly specifies a 50-400 bar adjustment range, matching the applicable original spring or pressure-range row. The selected supplier execution uses screw adjustment with a protective cap.

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 original spring table includes 50-400 bar, while this component size is rated 350 bar. The spring endpoint is not permission to operate the component above 350 bar. Keep the actual application setting within the component limit.

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 original base size. No delivered preset is inferred from a catalogue standard setting. The representative manufacturer family photograph depicts the VMPP L D5 family; the exact article and original size and spring rows 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.