Ross 1958A3130 Pilot Operated Check Valve Inline

1958A3130 is a 19 Series Pilot Operated Check Valve designed for inline mounting in pneumatic circuits, featuring 3/8" NPT ports for both inlet and outlet. This two-port, pilot-operated valve blocks return air to upstream equipment and uses a pilot signal to open in the direction from port 1 to port 2, while offering a slightly higher Cv in the pilot-opened reverse direction (port 2 to port 1) for reliable actuation. The forward flow is rated at 1.2 Cv (1,181 NL/min), and the reverse (pilot-opened) flow at 1.3 Cv (1,279 NL/min), enabling predictable performance across typical plant pressures. The valve is compact and inline with a right-angle orientation, measuring roughly 2.6 in (66 mm) in length and 1.1 in (27 mm) in width. It is listed under Safety Category 1 PL c within the Ross Controls product family, and belongs to the 19 Series PO Check Valves designed to prevent backflow in cylinders or pneumatic devices while allowing controlled pilot actuation.