HYDAC WSM Series Solenoid Valve | WSM06020ZR WSM08130C | 350 bar Directional Seated Valve

The WSM Series solenoid directional seated valves from Chengyuan Hydraulic are high-precision hydraulic control components fully compatible with HYDAC industrial standards. This series, including the WSM06020 (2-way) and WSM08130 (3-way) specifications, features a hardened steel poppet-type design. Unlike traditional sliding spool valves, the WSM series achieves “Zero-Leakage” performance through its seated seal, making it the ideal choice for load-holding circuits, accumulator isolation, and compact power unit designs. Every valve (e.g., WSM06020V-01-C-N-24DG) undergoes 100% simulated internal leakage and shifting response testing before delivery, guaranteeing 100% original-place interchangeability with existing systems.

Technical Specifications :

• Core Model Codes: WSM06020ZR, WSM06020V, WSM08130C

• Maximum Operating Pressure: 350 bar (35 MPa)

• Maximum Flow Rate: Up to 40 L/min (WSM06); Up to 30 L/min (WSM08)

• Cavity Size: 06020 (UNF 3/4-16); 08130 (UNF 3/4-16)

• Control Voltage: 24V DC (24DG), Optional 12V DC or 230V AC

• Sealing Type: Hardened steel poppet-seated valve

• Internal Leakage: Less than 0.1 cm³/min (approx. 5 drops/min) at max pressure

• Fluid Temperature Range: -20°C to +80°C

Key Technical Advantages:

• Zero-Leakage Poppet Construction: The primary advantage of the WSM series is its metal-to-metal seated seal. In the closed position, the valve provides hermetic isolation, which is critical for systems requiring long-term load holding or preventing accumulator pressure loss.

• Excellent Response Under High Load: The poppet is precision ground and vacuum heat-treated. Combined with a high-force wet-pin solenoid, it ensures millisecond-level switching response even at the full 350 bar rated pressure, without delay or sticking.

• Compact Threaded Cartridge Design: Standard threaded connections significantly reduce the footprint of hydraulic manifolds. The modular design allows for valve replacement in minutes without disconnecting pipes, simplifying maintenance and upgrades.

• Heavy-Duty Coil Reliability: Solenoid coils are vacuum-encapsulated for superior heat dissipation and vibration resistance. Coupled with a corrosion-resistant zinc-plated valve body, it ensures long-term stability in harsh outdoor environments like construction machinery.

Application Areas:

• Mobile Machinery: Agricultural tractor hitch systems and compact excavator attachment controls.

• Industrial Presses: Pressure-holding circuits, emergency braking, and safety shut-off systems.

• Compact Power Packs: Directional control for mini-hydraulic units and accumulator circuits.

Expert Maintenance Tips:

• Fluid Cleanliness Standards: Precision seated seals are sensitive to contaminants. Maintain system filtration to ISO 19/17/14 (10μm) or better to prevent poppet seat scratching.

• Coil Tightening Torque: Do not over-torque the coil nut during replacement. Hand-tightening is sufficient; excessive torque may crack the coil housing or cause the internal valve plunger to bind.

• Electrical Moisture Protection: Although the plugs are IP65 rated, in environments with frequent washdowns, consider adding waterproof covers or applying protective grease to the connectors.