Oleodinamica Marchesini V0590/1F-1.5MM VUSF 1/4 1 hole 1.5 mm fixed-orifice throttle check valve

Oleodinamica Marchesini V0590/1F-1.5MM is the VUSF 1/4 fixed-throttle check valve with one 1.5 mm calibrated hole and female 1/4" BSP connections. This full article and hole diameter are explicitly selected on the supplier offer. The manufacturer describes the one-hole CODE/1F execution with the diameter specified separately, and the selected diameter falls within the original size-row limits.

Connect V to supply and C to the actuator. Flow is free from V to C and restricted from C to V. The calibrated hole fixes the restriction geometry; it does not guarantee one constant flow at every pressure differential. The family maximum-flow value 20 l/min is a size-row capacity reference, not the regulated flow through this hole.

The factory size row gives maximum pressure 350 bar and standard opening reference 0.4 / 0.7 bar. No separately calibrated check spring is stated for this actual orifice article, so the opening reference remains text rather than an exact cracking-pressure filter.

The body is zinc-plated steel with hardened and ground internals, standard BUNA-N seals and guided-poppet construction. Common size-row references are body length 62 mm, hexagon size 19 mm, outside diameter 21 mm and mass 0.104 kg. The mass is not a separately weighed drilled execution.

The local technical PDF retains the complete relevant original manufacturer spread, with its exact size row, spring or orifice legend, hydraulic diagram and drawing. Neighbouring executions apply only to their identified rows. Oil temperature 50 °C and viscosity 30 cSt beside curves are reference conditions, not operating limits.