Oleodinamica Marchesini V0642/V180 VSQAPP 3/8 sequence valve with check valve - handknob

Oleodinamica Marchesini V0642/V180 is a VSQAPP 3/8 sequence valve with check valve with 3/8" BSP connections, a 10–180 bar spring setting range, maximum flow of 35 l/min and handknob adjustment. The factory base designation is V0642. The supplier lists this complete order code; the manufacturer sheet confirms the base valve, spring range and control option.

The valve feeds a second actuator after the primary circuit reaches the selected sequence pressure. Connect V to supply and C to the cylinder, following the original two-cylinder application circuit. An integral check valve permits free reverse flow.

VSQAPP compensates for primary pressure so that secondary-circuit back pressure does not add to the sequence setting in the same way as an ordinary VS2C circuit. The factory table lists a 350 bar maximum pressure for these 3/8 and 1/2 base sizes. This limit is distinct from the ordered spring range.

The original spring table gives a standard setting reference of 90 bar for 10–180 bar springs. The delivered setting is not independently established. Use the original pressure/flow curves at 50 °C and 30 cSt as reference conditions, not as an operating-temperature specification.

The /V option is handknob adjustment. The series image and base drawing may show a standard control. Base-table mass is a reference only; the configured handknob mass and its external envelope are not independently established.

The body is zinc-plated steel with standard BUNA-N seals and hardened, ground internal parts. The local PDF retains the complete relevant manufacturer article table, circuit, drawings and ordering notes unchanged.