WSM06020V-01M-C-N-24DG WSM06020W HYDAC Solenoid Directional Valve 350 bar

Product Overview

The WSM series 2/2 solenoid directional valves are direct-acting poppet-type cartridge valves engineered by HYDAC for high-pressure hydraulic systems, widely used for flow on/off control, accumulator pressure holding, clamping circuits, and lifting circuits. Featuring a hardened poppet sealing structure, these valves deliver near-zero leakage performance in the de-energized state.

The WSM series covers models including WSM06020V-01M-C-N-24DG (Normally Open) and WSM06020W (Normally Closed), utilizing the standard 06020 cavity threaded cartridge design (M20×1.5) for direct installation into manifold blocks, saving valuable installation space. Valve bodies are manufactured from free-cutting steel with hardened and ground internal poppet components, featuring CFD-optimized flow paths for minimal pressure drop and extended service life.

The solenoid coil features DIN EN 175301-803 standard connector, supports DC24V power supply with 0.8A rated current, and includes a push-type manual override for emergency operation in the event of power failure.

Our complete range of HYDAC WSM solenoid valves strictly adheres to OEM technical standards, achieving 100% direct interchangeability with original components. Every unit undergoes 100% simulated operating condition bench testing prior to shipment, ensuring performance parameters are fully consistent with genuine HYDAC products. Direct replacement of same-model HYDAC valves significantly reduces equipment downtime and maintenance costs.

⚠️ Model Code Decoding (using WSM06020V-01M-C-N-24DG as example) :

• WSM = Wegesitzventil / Solenoid Directional Poppet Valve

• 06020 = Nominal size 6mm, standard cavity 06020 (M20×1.5 mounting thread)

• V = Spool function (V = 2/2 Normally Open; W = 2/2 Normally Closed)

• 01 = Design series

• M = Metric thread

• C = Coil design (40-1836)

• N = NBR seals (standard); V = FKM seals (optional)

• 24DG = DC24V with DIN connector

Technical Specifications 

WSM06020V-01M-C-N-24DG (Normally Open)

• Product Series: HYDAC WSM series 2/2 solenoid directional valve

• Model Code: WSM06020V-01M-C-N-24DG

• Material Number (MPN) : 3135470

• Brand: HYDAC

• Valve Type: 2/2 direct-acting poppet-type solenoid cartridge valve

• Spool Function: Normally Open — flow P→A when de-energized, closed when energized

• Maximum Operating Pressure: 350 bar

• Recommended Maximum Flow: 20 L/min

• Nominal Size: 6 mm

• Cavity Standard: 06020 (M20×1.5 mounting thread)

• Internal Leakage: Leakage-free (max. 5 drops/min = 0.25 cm³/min at 350 bar)

• Coil Voltage: DC24V

• Rated Current (at 20°C) : 0.8 A (DC24V)

• Voltage Tolerance: ±15%

• Coil Duty Rating: Continuous, up to 115% nominal voltage at 60°C ambient

• Response Time: Energized approx. 40 ms / De-energized approx. 60 ms

• Sealing Material: NBR (standard) / FKM (optional, up to 120°C)

• Operating Fluid: Hydraulic oil per DIN 51524

• Media Temperature Range: -20°C to +100°C

• Ambient Temperature Range: -20°C to +60°C

• Viscosity Range: 10 to 420 mm²/s

• Filtration: Class 21/19/16 per ISO 4406 or cleaner

• Mounting Type: Threaded cartridge, no orientation restrictions

• Electrical Connection: DIN EN 175301-803 standard connector

• Manual Override: Push-type

• Ingress Protection: IP65

• Valve Body Material: Free-cutting steel

• Poppet Material: Hardened and ground steel

• MTTFd: 150 years

• Weight: Valve complete approx. 0.33 kg / Coil only approx. 0.19 kg

WSM06020W Series (Normally Closed)

• Product Series: HYDAC WSM series 2/2 solenoid directional valve

• Spool Function: Normally Closed — closed when de-energized, open when energized

• Maximum Operating Pressure: 250 bar (standard) / 350 bar (-61 model)

• Recommended Maximum Flow: 19 L/min (standard) / 25 L/min (-61 model)

• Coil Voltage: DC24V (standard)

• Internal Leakage: Leakage-free (max. 5 drops/min at 350 bar)

• Weight: Valve complete approx. 0.33 kg

• Sealing Material: NBR (standard) / FKM (optional)

Key Technical Advantages

1. Poppet-Type Hard Sealing for Zero Leakage
The WSM series employs a poppet-type hard sealing structure, distinct from conventional spool-type directional valves. In the de-energized state, the hardened poppet forms a metal-to-metal seal with the valve seat, achieving extremely low internal leakage—no more than 5 drops/min (0.25 cm³/min) at 350 bar operating pressure. This characteristic makes it particularly suitable for applications requiring long-term pressure holding, such as accumulator holding circuits and clamping circuits.

2. Direct-Acting Design for Reliable Operation at Zero Pressure Differential
The direct-acting solenoid design eliminates the need for system pressure to establish sealing. Even at extremely low or zero system pressure, the solenoid reliably drives the poppet for flow on/off control. Compared to pilot-operated valves, the direct-acting design delivers faster response and higher reliability, particularly suited for low-pressure start-up or systems with significant pressure fluctuations.

3. 350 bar High-Pressure Rating with CFD-Optimized Flow Paths
The full series supports maximum operating pressures up to 350 bar, compatible with the vast majority of high-pressure hydraulic systems. Internal flow paths are CFD (Computational Fluid Dynamics) optimized to achieve minimal pressure drop while maintaining rated flow capacity, improving overall system efficiency.

4. High-Performance HYDAC Solenoid and Extended Service Life
Equipped with HYDAC high-power wet-pin solenoids delivering excellent switching performance and vibration resistance. Internal poppet components are hardened and ground to ensure minimal wear and extended service life. Coils are designed for continuous duty, capable of withstanding up to 115% of nominal voltage at 60°C ambient temperature. Coil seals protect the solenoid system from oil and moisture ingress.

5. Compact Threaded Cartridge Design with Flexible Installation
The standard 06020 cavity threaded cartridge design (M20×1.5 mounting thread) enables direct installation into manifold blocks without additional piping connections. External surfaces are zinc-nickel plated for excellent corrosion resistance. Installation has no orientation restrictions—the valve can be mounted in any orientation, significantly enhancing system design flexibility.

6. 100% Direct Interchangeability and Simulated Condition Testing
All models strictly adhere to HYDAC original mounting dimensions and interface standards, enabling direct drop-in replacement of original valves without manifold modification or system adjustment. Every unit undergoes 100% simulated operating condition bench testing prior to shipment, ensuring consistent, stable performance at rated pressure and flow.

Application Areas

• Accumulator Holding Circuits: Leveraging zero-leakage characteristics for long-term pressure holding

• Hydraulic Clamping Systems: Clamping and unclamping control for machine tools and workholding fixtures

• Lifting and Elevating Circuits: On/off control for lifting platforms and hydraulic hoists

• Hydraulic System Flow On/Off: Safety shut-off or isolation valve applications

• Wind Power: Hydraulic pitch control and brake system flow control

• Construction Machinery: Auxiliary circuit control for excavators, wheel loaders

• Injection Molding & Rubber Machinery: Hydraulic flow switching and control

• Metallurgical Equipment: Hydraulic system control for rolling mills and continuous casting equipment

Expert Maintenance Tips

1. Verify Cavity Cleanliness Prior to Installation
As a threaded cartridge valve, ensure the cavity (06020 standard cavity, M20×1.5 thread) is clean, free of burrs, and free of metal debris prior to installation. Use a dedicated cavity reamer to prepare the cavity and ensure a flat seating surface.

2. Correct Installation Torque
Use a proper wrench on the valve body hexagon during installation and torque to the value specified in HYDAC technical manuals (recommended torque approx. 50 Nm). Never rotate the solenoid coil or connector housing during installation, as this may damage internal components or coil leads.

3. Coil Electrical Connection
The coil features a DIN EN 175301-803 standard connector. Power supply is DC24V with rated current 0.8A. Verify correct polarity during wiring (although some models feature a bridge rectifier for AC/DC operation, DC polarity should still be observed). AC220V must never be connected.

4. System Cleanliness Management
The WSM series poppet valve features extremely tight clearances and demands high oil cleanliness. Recommended system cleanliness: ISO 4406 Class 21/19/16 or higher. Install high-precision filters in the system return line and inspect filter elements regularly.

5. Periodic Functional Checks
Perform functional checks every 2,000 operating hours or annually, including: energized/de-energized switching test, leakage inspection (P→A ports), and response time testing. If sluggish response, abnormal leakage increase, or excessive coil temperature rise is observed, arrange for servicing or replacement.

6. Seal Material Selection
Standard seals are NBR (Nitrile) , suitable for media temperatures from -20°C to +100°C. If system operating temperature exceeds 100°C or special hydraulic fluids (e.g., phosphate esters) are used, select the FKM (Fluorocarbon) seal option (change “N” to “V” in the model code), which withstands media temperatures up to 120°C.