Oleodinamica Marchesini V0490/AC motor-flange relief valve with anti-cavitation

Oleodinamica Marchesini V0490/AC is a motor-flange relief valve with anti-cavitation for direct mounting on Danfoss OMS motors. The exact /AC row, not a neighbouring SE, DE or SF row, gives 50 l/min maximum flow, 350 bar maximum pressure, 1/2" BSP supply ports and mass 1.417 kg.

AC identifies the anti-cavitation circuit shown separately in the original manufacturer sheet. Its pressure-limiting and make-up check arrangement is different from the DE and brake-release SF circuits. The /AC table row shows no SF connection, so a brake-release port is not assigned to this article.

Flange M1/M2 directly to the matching motor interface and connect V1/V2 to supply. The factory lists alternative relief springs, but the exact observed bare /AC offer does not establish a delivered spring range or pressure preset; those values are omitted. The manufacturer family photograph may show the common DE body arrangement; the AC circuit and identified AC drawing govern this execution.

The local technical PDF retains the complete relevant original manufacturer spread, including the size table, option legend, hydraulic circuit and drawing. Neighbouring executions apply only to their identified rows. Oil temperature 50 °C and viscosity 30 cSt shown beside curves are reference conditions.