Oleodinamica Marchesini V0540 VRF 1/4 one-way flow control valve

Oleodinamica Marchesini V0540 (VRF 1/4) is an in-line one-way flow control valve with 1/4 inch BSP connections. The manufacturer lists a maximum flow of 20 l/min and a maximum pressure rating of 300 bar. These ratings identify separate selection limits; use the original performance curves and installation details to check the operating point.

The barrel throttle meters flow from C to V and provides a check-valve bypass for reverse flow from V to C. It is not pressure compensated: the resulting flow changes with pressure difference and oil viscosity. Rotate the outer sleeve to adjust flow, then secure the locking ring. When used with a pilot-operated check valve, install the regulator between the actuator and that check valve. The listed check-valve cracking pressure is 0.5 bar.

The body is zinc-plated steel with hardened and ground steel internal parts. The manufacturer specifies BUNA N seals. Reference curve conditions are 50 °C oil temperature and 30 cSt oil viscosity. The local reference includes the complete relevant manufacturer spread with its code table, hydraulic schematic, dimensions, curves and conditions.

Representative manufacturer product image for the VRF series. Port size, dimensions and adjustment details depend on the exact article; use the original drawing and article table in the local technical PDF.