Oleodinamica Marchesini V0545 VRB 1/4 bidirectional barrel flow control valve

Oleodinamica Marchesini V0545 (VRB 1/4) is a bidirectional barrel flow control valve. The factory pressure rating is 300 bar. Maximum flow is 20 l/min; the two threaded connections are 1/4 inch BSP.

The sleeve throttle meters flow in either direction. It has no pressure compensation, so flow and actuator speed vary with pressure difference and oil viscosity. Connect V to the supply and C to the actuator. If a pilot-operated check valve is also fitted, place the throttle between that valve and the actuator. Secure the locking ring after adjustment. The manufacturer allows slight leakage when closed; do not use the throttle as a positive isolation or load-holding device.

The manufacturer specifies a zinc-plated steel body, hardened and ground steel internal parts and BUNA N seals. The local technical reference preserves the complete relevant factory spread with the model table, circuit, dimensions and performance curves. Representative manufacturer product image for the VRB series. Use the exact article table and original drawing in the local PDF for port layout, dimensions and adjustment execution.