Oleodinamica Marchesini V0667/400 primary-pressure-compensated sequence valve

Oleodinamica Marchesini V0667/400 is the VSQAPP 3/4 primary-pressure-compensated sequence valve. Its original size row gives maximum flow 110 l/min and component pressure limit 400 bar. The exact supplier type explicitly specifies a 50-400 bar adjustment range, matching the applicable original spring or pressure-range row. The adjustment is by screw.

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 primary-pressure-compensated VSQAPP arrangement prevents secondary-circuit back pressure from adding to the primary sequencing setting, as described by the manufacturer. This is pressure sequencing, not a pressure-compensated flow regulator.

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.