Ross Controls 2751A4915 Pilot Operated Check Valve

Ross Controls 2751A4915 is a 27 Series Pilot Operated Check Valve designed for inline mounting in pneumatic circuits, delivering controlled check functionality with remote pilot actuation; it is a 2-way, 2-position valve with a 1/2 in main port and a 1/8-27 NPT pilot signal port. The valve uses pilot air pressure on the signal port to open or close the downstream check path, enabling remote control of flow and protection against backflow in pneumatic lines. The 2751A4915 variant has a Cv of 3.2 and weighs about 2.3 kg (roughly 5.0 lb); it uses standard NPT threads with Buna-N seals for both the main and pilot ports (Port/Seal Code 0). Inline mounting and the 1/2 in size identify this model as the 1/2 in size in the inline PO check valve family. This part is documented in Ross Controls’ literature for 27-Series PO check valves and is commonly used for functions such as isolating the pilot supply, cylinder cushion control, and protection of auxiliary circuits in pneumatic systems.