HYDAC WSM Series Solenoid Valve Replacement | WSM10120Y WSM16520V WSM06020V | Poppet Type Directional Valve

The HYDAC WSM Series Compatible Solenoid Directional Cartridge Valves manufactured by Chengyuan Hydraulic are high-frequency, premium fluid control components engineered to fully match the definitive engineering standards of HYDAC Fluidtechnik. This premium modular portfolio targets high-demand market segments in heavy industrial machinery and mobile equipment requiring positive drift-free load-holding or rapid auxiliary discharge. The ready-to-ship lineup specifically focuses on three core configurations: the pilot-operated normally closed solenoid poppet valve WSM10120Y-01-C-N-24DG (Metric 10120 cavity), the direct-acting normally open high-flow poppet valve WSM16520V-01-C-N-24DG (Metric 16520 cavity), and the compact direct-acting normally open valve with integrated mechanical plunger WSM06020V-01M-C-V-24DG (Metric 06020 cavity).

Functioning as the critical non-return and directional isolation commander within high-pressure locking blocks, accumulator safety circuits, and high-speed injection manifold systems, a cartridge valve’s response times, pressure drop profile, and structural seating tightness directly dictate the energy efficiency and position holding capability of the entire asset. HYDAC’s WSM family is internationally recognized for its signature leakage-free poppet-style isolation profile and robust metric threading interfaces. Chengyuan guarantees 100% original-place drop-in interchangeability across all variants concerning subplate mounting dimensions, metric cavity profiling (matching standard HYDAC 10120, 16520, and 06020 specifications), return spring rates, and solenoid coil electromagnetic shifting forces. Prior to distribution, every cartridge assembly undergoes 100% full-capacity simulated pressure testing, checking response delay boundaries and seat leakage drop rates under load to guarantee low-sluggishness switching under severe pressure shocks.

Technical Specifications

• Compatible Brand: HYDAC (German Standard Metric Cartridge Infrastructure)

• Target Replacement Model Codes: WSM10120Y-01-C-N-24DG, WSM16520V-01-C-N-24DG, WSM06020V-01M-C-V-24DG

• Internal Valve Function: 2-Way, 2-Position Solenoid Directional Control Valve

• Standard Cavity Designations (Metric):

  • WSM10120Y Range: Metric 10120 Cavity (Nominal Size 10 framework)

  • WSM16520V Range: Metric 16520 Cavity (Nominal Size 16 high-capacity framework)

  • WSM06020V Range: Metric 06020 Cavity (Nominal Size 06 sub-miniature high-pressure framework)

• Maximum Volumetric Flow Capacities (Qmax):

  • WSM10120Y Series: Up to 75 L/min (19.8 GPM)

  • WSM16520V Series: Up to 100 L/min (26.4 GPM) featuring ultra-low pressure drop

  • WSM06020V Series: Up to 20 L/min (5.3 GPM)

• Maximum Rated System Operating Pressure (Pmax):

  • WSM10120Y / WSM06020V Variants: Rated up to 350 bar (35 MPa / 5,075 psi) heavy-duty limit

  • WSM16520V Direct-Acting Variants: Rated up to 210 bar (21 MPa / 3,045 psi) continuous limit

• Initial Unpowered Spool Conditions:

  • Function Code Y (e.g., WSM10120Y): Pilot-operated, Normally Closed (NC), blocking flow in one direction

  • Function Code V (e.g., WSM16520V / WSM06020V): Direct-acting, Normally Open (NO), free flow bi-directionally; closes bi-directionally when energized

• Internal Sealing Leakage Rating: Absolute leakage-free design, restricting drop count to $\le 5$ drops/minute ($< 0.25$ cm³/min) under peak rated pressure holding states

• Coil & Electrical Interface Layout: Standardized 24V DC heavy-duty solenoid coil (DG designator, matching DIN EN 175301-803 3-pin connector layout)

• Manual Override Configurations: Model WSM06020V-01M-C-V-24DG includes the ‘M’ suffix, outfitted with a spring-return mechanical push-button plunger setup (Push override)

Key Technical Advantages:

• True Metal-to-Metal Poppet Interface for Absolute Zero Leakage: Unlike sliding spool valves that rely on microscopic clearance boundaries to control oil, the WSM design employs a hardened steel cone-to-seat poppet architecture. When closed, it forms a mechanical seal under high pressure. Even under continuous 350 bar holding stress, internal leakage is limited to fewer than 5 drops per minute, making it suitable for drift-sensitive boom stabilizers and load-holding lock configurations.

• CFD Hydrodynamic Sculpted Housing for Reduced Pressure Drop: To handle the high continuous volume requirements of the WSM16520V, Chengyuan utilized 3D Computational Fluid Dynamics (CFD) modeling to sculpt the internal oil path junctions. At a maximum flow speed of 100 L/min, the localized flow restriction pressure drop $\Delta p$ is lowered by 18% compared to basic machined alternatives, significantly slowing system temperature rise during rapid cycling.

• Through-Hardened Vacuum-Treated Steel Spool/Poppet Assemblies: The primary sliding components and pilot needles are machined from premium ball-bearing grade alloy steel, hardened via vacuum oil-quenching to a surface depth profile of HRC 60-63. This metallurgic framework preserves sharp edge tolerances against solid abrasive contamination and resists face collapse under high-frequency mechanical impact, with shift responses down to 30ms.

• Encapsulated Resin Thermal Coil Pack with High-Spec ZnNi Plating: The heavy-duty 24V DC coil windings are vacuum-encapsulated in advanced synthetic insulation polymer, achieving an IP65 rating and resisting heat breakdown under continuous duty cycles. The exposed carbon steel valve components are finished with a premium Zinc-Nickel (ZnNi) alloy plating that passes a 1,000-hour neutral salt spray test, offering corrosion protection for outdoor mobile machinery and coastal marine settings.

Application Areas:

• High-Duty Automotive Plastic Injection Molding: Controlling auxiliary fast-charging loops, accumulator dump sub-blocks, and high-frequency hydraulic core pulling valves.

• Mobile Machinery Boom Safety & Load Locking Blocks: Supplying non-drift cylinder holding for scissor lifts, boom aerial work platforms, and mobile crane outrigger stabilization circuits.

• Central HPU Unloading & Auxiliary Flow Bypasses: Acting as the fast electro-hydraulic bypass trigger inside dual-pump high/low volume industrial power packs for rapid pressure dump transitions.

Expert Maintenance Tips:

• Mandatory Control of Assembly Installation Torque Boundaries: Because the WSM lineup relies on precise, fine公制 fine-pitch threads, it is mandatory to insert the cartridge units into their manifold blocks using a calibrated torque wrench. Secure the Metric 06020 size to 15-20 Nm, the Metric 10120 size to 45-50 Nm, and the heavy-duty Metric 16520 size to 150 +20 Nm. Exceeding these torque specs can squeeze or twist the cartridge sleeve wall, binding the internal poppet or causing coil overheating.

• Strict Differentiation of FKM (Viton) and NBR Sealing Materials: Model WSM06020V-01M-C-V-24DG features the V parameter indicating integrated Fluorocarbon (FKM) sealing matrices rated for environments from -20°C to +120°C and offering resistance against synthetic fire-resistant fluids. In contrast, models marked with N (such as WSM10120Y) use Nitrile rubber (NBR), which is limited to a 100°C ceiling. Never mix these compounds during field rebuilds to prevent oil swell seal failures.

• Prevent Blockages in Ultra-Fine Pilot Orifice Paths: In pilot-operated models like the WSM10120Y, pressure equalization depends on a micron-scale hole drilled through the center of the main poppet plunger. Consequently, system oil filtration must be kept at or above ISO 4406 21/19/16 (NAS Class 8 limits, requiring filter elements with absolute micron ratings of $\le 10 \mu m$). Allowing varnish buildup or solid debris to settle will plug this orifice, causing the valve to hang open under load or fail to shift when the coil is powered.