Oleodinamica Marchesini V0508/300 dual relief valve with anti-cavitation

Oleodinamica Marchesini V0508/300 is the VAUAC 1/2 dual relief valve with anti-cavitation, with 1/2" BSP connections. Its original base row specifies maximum flow 70 l/min and maximum operating pressure 350 bar. The exact supplier type explicitly specifies the 80-300 bar spring range, matching the original spring table. The adjustment is by screw.

The two pressure-limiting elements relieve the motor branches to T; the check valves provide anti-cavitation make-up flow. Connect M1/M2 to the motor, V1/V2 to supply and T to tank following the drawing. The English connection paragraph uses P1/P2 while the diagram and Italian paragraph label V1/V2; this card follows the diagram. The factory recommends outlet check valves with at least a 3 bar setting; no additional check valve is assumed included.

The exact supplier row and original spring table both specify 80-300 bar. The adjacent curve carries a 50-300 label; that source discrepancy is retained here and does not replace the selected 80-300 bar table execution.

The standard BUNA-N seals and hardened, ground steel internals follow the original family specification. Any mass is explicitly a reference for the unsuffixed base execution. The supplier listing does not independently weigh the adjustment option or establish the delivered pressure preset. The representative manufacturer family photograph shows the standard body and may show a screw instead of the selected handknob or sealing-cap preparation; the exact adjustment is defined by the article and option legend.

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