Oleodinamica Marchesini V0278 VRA 40/50 SE plough overturning valve

Oleodinamica Marchesini V0278 (VRA 40/50 SE) is a plough overturning valve for automatic reversal of the hydraulic cylinder on a reversible plough. Its factory maximum pressure is 400 bar and maximum exchange pressure is 200 bar. These are separate limits; the exchange pressure is not the valve body pressure rating. The listed mass is 1.990 kg.

A single pilot-operated check controls leakage on the cylinder head side. The rod side must rest against the plough mechanical stops. The sheet lists a supplied exchange-pressure range of 125–140 bar. Its Italian and English statements about upward frame rotation conflict; confirm the permitted plough geometry with the manufacturer before choosing this execution.

Connect C1 to the cylinder rod side, C2 to the head side, and P/T to the machine supply. All four connection ports are listed as G 3/8. The body can be fitted in line with the cylinder or fixed to the plough through its threaded mounting hole.

The zinc-plated steel body contains hardened and ground steel internal parts and standard BUNA-N seals. The guided poppet provides low-leakage load holding. Catalogue dimensions are supplied for installation checks; the type designation is retained without generating optional /CR or other configurations.

The manufacturer photograph represents the series. The local PDF retains the relevant original article tables and drawings unchanged.