Oleodinamica Marchesini V0508/RU/V single-adjustment relief valve with anti-cavitation

Oleodinamica Marchesini V0508/RU/V is a single-adjustment relief valve with anti-cavitation with 1/2" BSP connections. The applicable original V0508/RU circuit row gives 60 l/min maximum flow and a 350 bar component limit. The supplier row specifies the execution but does not print the selected spring range. No numeric range or delivered preset is inferred from the digits in its offered code. The adjustment is by handknob.

The VAA/RU uses one shared adjustment to limit pressure in both actuator branches and check valves to prevent cavitation during braking of an over-running load. Connect one V1/V2 pair to the motor or actuator, the opposite V1/V2 pair to supply, and T to tank. The factory recommends an outlet check valve with at least a 3 bar cracking setting; no additional check is assumed included.

The sole original V0508/RU size row lists a 50-300 bar pressure-range reference. It remains labelled as a factory row reference because this actual supplier adjustment row does not explicitly select a range. It is separate from the 350 bar component limit.

The original specification uses a zinc-plated steel body, hardened and ground steel internals and standard BUNA-N seals. Mass is a labelled reference for the matching original circuit row, not an independently weighed handknob or sealing-cap option. No delivered preset is inferred from catalogue standard settings. The genuine representative family photograph may show the standard DE or screw-adjusted body; the actual SE/DE/SF circuit and selected adjustment follow the named article and original diagrams.

The local PDF retains the complete relevant original spread, with its exact circuit row, spring/adjustment legend, hydraulic symbol and mounting drawing. Adjacent executions apply only to their named rows. Oil temperature 50 C and viscosity 30 cSt beside curves are reference conditions, not operating limits.