Oleodinamica Marchesini V0339 single-acting plough overturning and alignment valve — VRAP 70/80 SE SV

Oleodinamica Marchesini V0339 is a single-acting plough overturning and alignment valve for a reversible plough with separate alignment and overturning cylinders. The original manufacturer sheet lists this exact code and calibration type. The sequence first aligns cylinder B, then overturns cylinder A, then returns cylinder B to the working position.

The exact row gives maximum component pressure 400 bar and maximum exchange pressure 230 bar. The sheet describes 150 bar as its supplied exchange-setting reference; that catalogue statement is not a measurement or confirmation of a delivered unit. A maximum-flow rating and cylinder-bore limits are not inferred from the 70/80 or 80/100 type labels.

The connection paragraph uses C1/C2 for overturning cylinder A, U1/U2 for alignment cylinder B and P/T for machine supply. The threaded-port table instead labels C1–C2 and V1–V2. Preserve the complete original diagram and confirm that port-label convention on the actual assembly; no unqualified full port map is assigned.

The SE execution is the single-acting overturning version recommended by the factory for smoother rotation. This exact calibration type is retained; it is not replaced by the DE version.

The original manufacturer document is an earlier edition retained by the named supplier. This profile documents that exact offered article; it does not assert equivalence with later similarly named plough-valve variants. No individual discontinuation notice has been established.

The local PDF retains the complete relevant original pages, exact size row, hydraulic symbol and installation context. Neighbouring executions apply only to their identified rows. Oil temperature 50 °C and viscosity 30 cSt shown with curves are reference conditions, not general operating limits.