HAWE GR2 GS2 GZ3 Series Solenoid Valve | GR2-4-G24 GS2-12-GM24 GZ3-1R | Directional Seated Valve

Chengyuan Hydraulic presents the GR, GS, and GZ Series solenoid directional valves, meticulously engineered to meet the high-sealing standards of HAWE (Germany). This range, featuring core models such as GR2-4-G24, GS2-12-GM24, and GZ3-1R-G24, is world-renowned for its “zero-leakage” performance in hydraulic holding circuits. Unlike traditional spool-type valves, Chengyuan’s seated valves utilize spring-loaded balls or cones for closure. We guarantee 100% Drop-in Interchangeability for all mounting configurations (pipe or manifold) and solenoid specifications. Supported by our 100% Simulation Load Testing, every valve is verified under pressures ranging from 350 bar to 450 bar to ensure absolute reliability for machine tools, clamping systems, and lifting machinery.

Technical Specifications 

• Series Category: GR (Standard) / GS (Reinforced) / GZ (Damped)

• Valve Design: Directional Seated Valve (Zero-leakage)

• Max Operating Pressure: Up to 400 – 450 bar

• Nominal Flow: 12 L/min – 25 L/min (Sizes 2, 3, 4)

• Control Voltage: G24 (24V DC), GM24 (with surge protection), WCG (AC-rectified)

• Logic Functions: 2/2-way, 3/2-way (e.g., GR2, GZ3)

• Connection Type: G (Threaded Pipe) or Manifold Mounting

• Switching Time: 20ms – 50ms

• Sealing: Steel-on-steel (Ball/Cone seat)

Key Technical Advantages:

• Bidirectional/Unidirectional Zero-Leakage: Utilizing specially hardened valve seats and high-precision ground ball components. In the closed position, the oil leakage is virtually zero, effectively eliminating load-drifting issues in hydraulic outriggers or cylinders.

• High-Pressure Switching Reliability: The seated design is unaffected by radial hydraulic forces. Even at 400 bar, the solenoid can easily overcome backpressure for reliable switching without the “stiction” common in spool valves.

• Heavy-Duty Solenoid Design: Equipped with high-performance dry or wet-pin solenoids with 100% duty cycle rating. Models like GS2-12-WCG feature integrated surge protection to ensure longevity under high-frequency operation.

• Compact Housing: The valve bodies are machined from high-strength forged steel, offering extreme pressure resistance and a compact footprint, ideal for space-constrained mobile hydraulic power units.

Application Areas:

• Machine Tool Clamping: Maintaining clamping pressure for extended periods to prevent workpiece loosening.

• Lifting Machinery: Safety or pilot control valves to ensure the locking of booms or outriggers.

• High-Pressure Power Units (HPU): Controlling flow in micro-high-pressure systems like bolt tensioners or lab presses.

• Braking Systems: Rapid pressure release and maintenance in industrial braking circuits.

Expert Maintenance Tips:

• Filtration Management: While more robust than spool valves, seated valves require oil cleanliness better than 10μm absolute to prevent seat damage and micro-leakage.

• Solenoid Air Purging: For wet-pin solenoids, ensure the internal cavity is filled with oil during installation to avoid response delays or humming caused by trapped air.

• Backpressure Limit: Always monitor the T-port (return) pressure. Excessive backpressure (typically > 20 bar) may interfere with the valve’s reset mechanism.