Cartridge Valves
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Note: Data may vary by configuration. See CONFIGURATION section.

Cavity 17A-3
Rated Flow 63.4 gpm 240 L/min
Maximum Operating Pressure 5000 psi 350 bar
Valve Hex Size 1-1/4 in. 31.7 mm
Valve Installation Torque 148 - 158 lbf-ft 200 - 215 Nm
Weight 1.1 lbs 0.5 kg
This is a pilot-to-open check valve with external pilot port, pilot piston and stem seal. When pressure at port 2 exceeds the spring bias pressure, the poppet is pushed from its seat and allowed from port 2 to port 1. Pressure applied to the external pilot port allows flow from port 1 to port 2, which is directly proportional to the load pressure at port 1. Hardening processes and precision machining for long life and low leakage.
 
  • Recommendation: To avoid back pressure affecting pilot operation, please connect port 3 to the tank.
  • This valve can prevent the drifting of loads and securely locks pressurized loads, also provides protection to a pipe rupture or hose break.
  • Internal components are made of high-quality materials, processed heat treatment and precision grinding to achieve excellent wear resistance and protection against contamination for long-lasting durability.
  • Virtually leak-free. If the valve causes the load to drift, the seat may be damaged by contamination. Please replace the valve immediately.
  • Pilot-to-open check valves are not intended to be used as motion control valves. If motion control is required in a circuit, please choose counterbalance valves.
  • Industry common cavity.
  • This valve is suitable for mounting in regenerative circuits or for controlling motors or cylinders.
  • Available bias springs for back pressure applications flexibility.
  • Consider using a check valve instead of a counterbalance valve if overrunning loads or controlled release speed are not critical in the application.
  • WINNERcoat® Zinc-Nickel Plating is salt spray tested in accordance with DIN EN ISO 9227 for up to 1000 hours.
  • Winner guarantees that all products performance a 100% functional test before shipment.
typical pressure drop performance curve for CO17A3F pilot-to-open check valve with external pilot port, sealed pilot and stem seal, showing pressure and flow characteristics