Oleodinamica Marchesini V0631 VU 1 1/4 in-line check valve

Oleodinamica Marchesini V0631 (VU 1 1/4) is an in-line check valve with 1 1/4 inch BSP connections. The manufacturer lists a maximum flow of 250 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 guided-poppet check element permits flow from V to C and blocks reverse flow from C to V. For this exact standard article, the manufacturer lists a cracking-pressure interval of 0.7-1 bar. Keep this interval distinct from separately ordered higher-pressure spring versions. Consult the size-specific pressure-loss curve when checking free-flow losses.

The body is zinc-plated steel with hardened and ground steel internal parts. 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 VU series. Port size, dimensions and adjustment details depend on the exact article; use the original drawing and article table in the local technical PDF.