Cartridge Valves
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  • Product Description
  • Performance Curve
  • Technical Reference
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Note: Data may vary by configuration. See CONFIGURATION section.

Cavity 21A-4
Rated Flow 10.57 gpm 40 L/min
Control Pilot Flow 0.03 - 0.04 gpm 0.11 - 0.16 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
Adjustment Srew Internal Hex Size 5/32 in. 4 mm
Locknut Hex Size 9/16 in. 14.27 mm
Locknut Torque 6 - 7 lbf-ft 9 - 10 Nm
Weight 0.42 lbs (Z=L) 0.19 kg (Z=L)
This is a pilot-operated, spool-type, ventable reducing/ relieving valve. It allows bi-directional flow between port 2 and port 1. When the pressure at port 1 exceeds the pressure setting, the spool shifts to restrict flow at port 2, regulating the pressure at port 1. If the pressure at port 1 continues to rise above the valve setting, the spool shifts further to relieve excess pressure through port 3 (tank) until the set pressure is restored. Port 4 (vent port) can be used with pilot or 2-way valves to enable remote control.

  • When X=43, the lowest pressure will be a bit higher than standard.
  • Please note the pressure differential between inlet and reducing port when select the proper adjustment range.
  • Port 4 of this valve can be used for remote pressure control applications. For example, when paired with the Winner proportional relief valve PRB-8A-2D, it becomes a high-performance proportional reducing/relieving valve with a maximum pressure of up to 350 bar (5000 psi).
  • 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.