Oleodinamica Marchesini R1351 VS 1/4 bidirectional throttle screw

Oleodinamica Marchesini R1351 (VS 1/4) is a bidirectional throttle screw with a 1/4" BSP port thread. It mounts directly in an actuator port for coarse flow restriction when an in-line restrictor will not fit. The listed installation dimension L is 36 mm and overall dimension L1 is 53 mm.

The primary documents disagree on pressure: the Marchesini VS sheet lists 350 bar, while the DICSA NBECB sheet for the same article code lists 320 bar. Both documents are provided locally for comparison. A single unqualified maximum operating pressure is not assigned to this record; establish which execution and rating apply before selecting it for a circuit.

The body is zinc-plated steel. The original drawings agree on the port size and principal installation dimensions. The manufacturer describes coarse restriction in both directions, rather than the equivalent control and security of a dedicated flow-regulator valve. Neither a calibrated flow setting nor a maximum flow is established by these sheets.

Follow the original section drawing for the port engagement, adjustment screw and sealing arrangement. A seal compound, operating-temperature range and pressure-compensated behaviour are not specified. The manufacturer image is representative of the VS series; use the exact article drawings in the local documents for its connections and dimensions.