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

Cavity 11A-3
Rated Flow 15.85 gpm 60 L/min
Maximum Operating Pressure 5000 psi 350 bar
Valve Hex Size 7/8 in. 22.22 mm
Valve Installation Torque 30 - 37 lbf-ft 40 - 50 Nm
Response Time-Typical 10 ms
Maximum Leakage Approximately 0.7 cc/min
Weight 0.22 lbs 0.1 kg
This is a pilot-operated, balanced poppet, ventable relief valve with an integral 8A-2 or 08W-2 pilot control cavity for use with any 8A-2 or 08W-2 pressure control cartridge valve. When the pressure at port 1 overcomes the pilot control setting, it pilots open port 2 and allows throttling flow to regulate the pressure. The pressure differential between port 1 and port 2 is based on the settings of the pilot control. Changes in pressure at port 2 do not affect the pressure setting, making it suitable for sequential applications. This valve with 8A2 cavity is commonly paired with Winner proportional relief valves, such as the PRB8A or PRA8A.

  • The maximum leakage is approximately 0.7 cc/min.
  • W spring is suitable for higher pressure drop application.
  • This valve features a balanced poppet design to reduce cavitation and manifold erosion during high pressure drop applications.
  • Pressure at port 3 is added directly to the valve setting in a 1:1 ratio.
  • Working parts are heat-treated and high-precision ground to increase hardness for long life.
  • A variety of seal kit materials for different applications, see seals information under Technical Reference.
  • Winner's cartridges pressure rating tested to the standard of the NFPA specification T2.6.1 and the fatigue rating's assurance and verification level is "90/90".
  • 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. 
1. Pilot Capacity Proportioanl Relief Valve (direct acting) 
PRB-8A-2D-Y-Z
PRB-8A-2C-Y-Z

2. Pilot Capacity Proportioanl Relief Valve (inverse direct acting)
PRA-8A-2C-Y-Z
PRA-8A-2D-Y-Z-74