Oleodinamica Marchesini V0220 VBPSE 1/4 L 4 VIE single pilot-operated check valve

Oleodinamica Marchesini V0220 (VBPSE 1/4 L 4 VIE) is a single pilot-operated check valve. The factory lists a 350 bar working-pressure limit. Maximum flow is 20 l/min through 1/4 inch BSP connections. The manufacturer pilot-ratio notation is 1:5.5, and the listed cracking pressure is 4 bar.

One pilot-operated check element blocks reverse flow on the controlled actuator line until a pilot signal opens it. Connect V1 and V2 to the supply lines, C1 to the actuator free-flow side and C2 to the side requiring holding. The four-way port arrangement does not mean that both actuator directions are locked. Use the original hydraulic circuit and pressure-loss curves to verify the installation; a pilot check valve should not be treated as an overrunning-load speed-control valve.

The manufacturer specifies a zinc-plated steel body with hardened and ground steel internal parts. Standard seals are BUNA N. The local technical reference contains the complete relevant factory spread, including the code table, hydraulic schematic, dimensions and applicable operating conditions. Representative manufacturer product image for the VBPSE series. Port sizes and execution details depend on the exact article; use its factory table and original drawing in the local PDF.