Oleodinamica Marchesini V0818 V-121 1/2 NA normally open push-button end-of-stroke valve

Oleodinamica Marchesini V0818 (V-121 1/2 NA) is a normally open push-button end-of-stroke valve with 1/2 inch BSP ports. The factory lists a maximum flow of 60 l/min and a pressure rating of 350 bar. These limits describe the exact size and execution; the ratings of adjacent models are not interchangeable.

The unactuated valve permits oil passage. A mechanical push on the plunger closes the path; the factory drawing marks the start of closure at 4 mm of travel and a maximum plunger stroke of 15 mm. This normally open execution is distinct from the normally closed VF-NC and the separate /VU reverse-check version.

Use ports P and A according to the intended application and the original hydraulic diagram. The circuit connection depends on the application; follow the mounting scheme for the intended use. The pressure-loss curves apply to an effective stroke greater than 50%, as printed in the factory sheet.

The body material is zinc-plated steel, with hardened and ground steel internal parts and BUNA N seals. The local reference retains the complete relevant original code table, schematic, drawings, curves and conditions. Representative manufacturer product image for the VF-NA series. Port sizes and execution details depend on the exact article; use its factory table and original drawing in the local PDF.