Hydac WSM06020 Solenoid Valve | WSM06020Y-01M 24DG 230AG

The WSM06020 Series (including the core WSM06020Y-01M configurations) of direct-acting screw-in cartridge solenoid valves manufactured by Chengyuan Hydraulic are high-density directional fluid control elements engineered to fully cross-reference the rigorous industrial benchmarks of Hydac. Functioning as a premium 2-way, 2-position directional seat/poppet valve, this series is widely integrated into advanced hydraulic networks to execute leak-free load holding, system unloading, and accumulator pressure isolation. Focusing on the targeted model specifications provided—WSM06020Y-01M-C-N-24DG (24V DC variant) and WSM06020Y-01M-C-N-230AG (230V AC variant)—Chengyuan applies specialized vacuum hardening and micro-lapped spherical poppet geometries to guarantee 100% original-place interchangeable plug-and-play compatibility within standard 06020 cavities. Every single cartridge valve undergoes 100% simulated loaded condition verification, static zero-leakage tracking, and continuous thermal coil cycling before dispatch, securing reliable switching defense up to 250 bar continuous pressure limits.

Technical Specifications :

• Brand Cross-Reference: Hydac WSM06020 Series Equivalent Matrix

• Target Configurations Covered: WSM06020Y-01M-C-N-24DG, WSM06020Y-01M-C-N-230AG

• Cartridge Cavity Profile: Hydac Standard 06020 Cavity (Thread format: 3/4-16 UNF-2B)

• Valve Functional Symbol: 2-Way, 2-Position (2/2-Way), Normally Closed (NC) directional poppet layout

• Maximum Rated Working Pressure: 250 bar (25 MPa / 3625 psi continuous structural envelope)

• Maximum Allowable Flow Rate Volumetrics: Up to 20 L/min (5.3 GPM)

• Internal Sealing Leakage Rating: Ultra-low leakage ($\le 5$ drops/min at full 250 bar loading, near zero-drop locking)

• Solenoid Voltage Power Options (24DG / 230AG):

  • 24DG Configuration: 24V DC driven via a standard DIN 43650 rectangular plug connector interface

  • 230AG Configuration: 230V AC (50-60Hz) featuring an integrated rectifier bridge within the coil core

• Operating Thermal Span: -20°C to +80°C (Governed by standard dynamic Nitrile NBR O-ring assemblies)

• Total Assembly Net Weight: ~0.38 kg (0.83 lbs)

Key Technical Advantages:

• Precision Vacuum-Hardened Steel Poppet and Mating Seat Geometry: The heart of the WSM06020Y poppet cluster is ground from premium high-carbon chromium bearing steel, heat-treated via vacuum-quenching to exceed HRC 60. The seating surfaces are micro-lapped to achieve a sub-micron mechanical seal. When closed, system hydraulic pressure mechanically wedges the poppet tighter into its seat, providing a “near zero-leakage” capability for load-holding applications.

• Heavy-Duty High-Output Wet-Pin Armature Mechanism: The solenoid tube assembly utilizes a wet-pin configuration capable of accepting full-pressure backloading. The moving armature operates completely immersed in the system hydraulic fluid, which provides natural lubrication and cushioning. This dampens harsh mechanical shifting shocks, ensures whisper-quiet switching acoustics, and extends structural fatigue life.

• 360° Rotatable Encapsulated Coil with Non-Intrusive Quick-Release Nut: The electrical driver coil is fully encapsulated in high-density composite resin, offering superb environmental sealing against moisture and dust ingression. Secured via a high-tensile anodized retaining nut, the coil can be smoothly rotated 360° to accommodate tight wire routing. Field coils can be swapped without disturbing the hydraulic pressure boundary.

• CFD-Optimized Low-$\Delta p$ Internal Fluid Galleries: Despite its compact envelope, the internal flow cavities and throttling edges are shaped using 3D computational fluid dynamics (CFD) optimization. When shifted to the fully open position at 20 L/min, fluid restriction and localized pressure drop ($\Delta p$) are minimized, suppressing turbulence-induced thermal buildup across the manifold block.

Application Areas:

• Compact Mobile Power Packs & Lift Units: System unloading loops for compact power units, and emergency fail-safe drift locking valves for forklift and aerial work platform lift cylinders.

• Accumulator Isolation & Safety Circuits: Functioning as an automatic safety dump or isolation valve coupled with hydro-pneumatic accumulators on wind turbine pitches or machine tool centers.

• Integrated Hydraulic Custom Manifolds: Utilized by OEM system builders as a compact pilot-stage switch or independent branch line circuit cutoff valve in high-density manifold blocks.

Expert Maintenance Tips:

• Enforce Strict Adherence to the 30 Nm Installation Torque Boundary: When threading the WSM06020 cartridge into the custom manifold block, you must use a calibrated torque wrench—never blind-tighten with a standard wrench! The required installation tightening torque is exactly 30 Nm ($\pm 3$ Nm). Overtightening will distort the fine walls of the internal cartridge sleeve, causing the internal poppet to stick and jam, while undertightening triggers external O-ring bypass leakage.

• Incorporate Surge Protection Networks for High-Voltage 230AG Installations: For systems executing control cycles via the 230AG AC voltage configuration, the abrupt de-energization of the coil triggers severe reverse inductive voltage spikes. It is highly recommended to bridge an RC snubber network or metal oxide varistor (MOV) surge protector across the supply loop to shield the internal rectifier diodes and the upstream PLC digital outputs from voltage breakdown.

• Mandatorily Complete Full Accumulator Depressurization Prior to Servicing: Because the WSM06020 series is frequently used as a pressure-holding lock block directly connected to accumulators, never assume that turning off the main electrical isolator makes the system safe for teardown! Before loosening the cartridge hex, manually cycle the system dump valve to drain stored fluid back to the reservoir, ensuring the inline pressure gauge reads zero to prevent accidental high-pressure fluid injection.