Oleodinamica Marchesini V0517 VEP FLP 1/2 pump-mounted low-pressure unloading valve

Oleodinamica Marchesini V0517 (VEP FLP 1/2) is a pump-mounted low-pressure unloading valve for a circuit with two parallel pumps. Maximum listed flows are 20 l/min at AP, 40 l/min at BP and 60 l/min at T. The AP/high-pressure side is rated up to 320 bar, while the BP/low-pressure stage is limited to 80 bar.

When the unloading pressure setting is reached, the larger-displacement high-flow pump is routed to tank. The smaller high-pressure pump continues supplying the actuator. Port-specific flow and pressure limits must be observed independently.

Flange BP onto the larger high-flow, low-pressure pump. BP is an O-ring-sealed flange passage with an 11 mm bore. Connect AP to the smaller pump, T to tank, U to the circuit and M to an optional gauge. AP is 3/8 inch BSP; T/U are 1/2 inch BSP; M is 1/4 inch BSP.

The high-pressure branch requires a separate pressure-relief function, such as an inline relief or the main relief on the directional valve. This VEP FLP article is not specified as including that additional high-pressure relief valve. Use the exact original mounting drawing; the IFF 40 and standard bodies have different flange geometry.

The zinc-plated steel body contains hardened and ground steel internal components. Seals are standard BUNA N. The local PDF retains the complete relevant original ratings, circuit, drawings and conditions. Representative manufacturer product image for the VEP FLP series. Refer to the exact article drawing in the local PDF for its port geometry and mounting interface.