Ross Controls D2768D5904 Dual Pilot Operated Check Valve

The Ross Controls 2768D5904 Dual Pilot Operated Check Valve is a 3/4-inch inline, pilot-operated check valve in the 27 Series, designed to hold pneumatic cylinder loads in place when the control signal is removed or power is unavailable. This inline-mount PO check valve installs directly in the line between a directional control valve and the actuator, delivering high-flow performance without adding excessive dead volume and offering rapid response for cylinder extend/retract cycles. The model prefix D indicates BSPP (G) thread variants for this size, aligning with Ross’ port-size and thread-code conventions. In the 3/4-inch size, the 27 Series PO check valves are rated for substantial flow and can deliver up to about 9.2 Cv in the 3/4" body size, making them suitable for demanding high-flow circuits that require secure load holding. Typical applications include load holding and safe cylinder position control in automated pneumatic systems, where a pilot signal opens the valve to allow motion and the loss of pilot pressure causes the valve to close and prevent backflow, thereby maintaining position under changing pressures or power conditions. The 2768D5904 designation identifies a dual pilot-operated configuration tailored to a 3/4" port, consistent with Ross catalog entries for Safety-Related PO Check Valves in the 27 Series.