Oleodinamica Marchesini V0665/V400 direct-acting sequence valve

Oleodinamica Marchesini V0665/V400 is the VS2C 3/4 direct-acting sequence valve. Its original size row gives maximum flow 110 l/min and component pressure limit 400 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 V to supply and C to the cylinder. The valve admits flow to the secondary circuit after the primary circuit reaches the set sequencing pressure, with free reverse flow through the integral check valve. Follow the original two-cylinder application drawing.

The VS2C 3/4 size row gives a 1 bar opening-pressure reference for the reverse-flow check. It is separate from the adjustable sequencing pressure. Secondary pressure contributes to the operating sequence pressure in this uncompensated arrangement.

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.