Oleodinamica Marchesini V0061 metric double pilot-operated check valve

Oleodinamica Marchesini V0061 is a metric double pilot-operated check valve identified as VBPDE 18 L, with M18 x 1.5 connections. The exact factory row gives a 1:5.5 pilot ratio, 4 bar cracking pressure, 35 l/min maximum flow and 350 bar component limit.

The valve holds a double-acting cylinder by allowing free flow in one direction and preventing reverse flow until the opposite pilot pressure opens the corresponding check. Connect V1/V2 to the directional-valve supply and C1/C2 to the actuator as shown in the original symbol.

The original dimensional row gives body L of 68 mm, L1 of 118 mm, height 40 mm, thickness 30 mm and mass 0.630 kg. The 18 L factory label is retained alongside the explicit M18 x 1.5 thread; no unprinted pipe outside diameter or nominal bore is inferred from that label.

The local technical PDF retains the complete relevant original manufacturer spread, including the size table, option legend, hydraulic circuit and drawing. Neighbouring executions apply only to their identified rows. Oil temperature 50 °C and viscosity 30 cSt shown beside curves are reference conditions.