WSM06020W HYDAC Solenoid Directional Valve 250 Bar 19 L/min

Product Overview

The WSM06020W series cartridge solenoid directional valve (including models WSM06020W-01M-C-V-12DG and WSM06020W-01M-C-N-24DG) is manufactured to original HYDAC technical standards. Belonging to the WSM06020W series with metric cartridge cavity 06020 (M20×1.5 thread), this valve is a direct-acting, normally closed 2/2 directional poppet valve. Featuring a metric cartridge mounting design conforming to ISO 4401 cavity standards, the solenoid directly drives the poppet to control flow direction and on/off in hydraulic systems.

The WSM06020W-01M-C-V-12DG features 12 VDC solenoids, FKM (Viton, code V) seal material, push-type manual override (code M), maximum operating pressure of 250 bar, and maximum flow of 19 L/min. The WSM06020W-01M-C-N-24DG features 24 VDC solenoids, NBR (nitrile rubber, code N) seal material, and push-type manual override. When the solenoid is de-energized, the valve blocks flow in both directions. When energized, the valve allows flow in both directions. The hardened and ground steel poppet ensures minimal wear and extended service life. CFD-optimized flow paths minimize pressure drop. Coil seals protect the solenoid system, and external surfaces are zinc-plated for corrosion protection. The compact design enables space-saving installation in connection housings and control blocks.

This product is dimensionally and functionally identical to the original HYDAC WSM06020W series valve, with a cartridge cavity conforming to the 06020 standard, offering true drop-in interchangeability for direct replacement of same-specification OEM valves without modifying piping systems or mounting interfaces. Every unit undergoes 100% bench testing under simulated working conditions, including rated pressure holding, directional response verification, internal leakage measurement, and solenoid response characterization.

Technical Specifications 

General Specifications

• Model: WSM06020W-01M-C-V-12DG / WSM06020W-01M-C-N-24DG

• Product Series: WSM06020W (Metric cartridge / Cavity 06020 / M20×1.5 thread)

• Function Type: 2/2 directional poppet valve, direct-acting, normally closed

• Design: Metric cartridge solenoid directional valve, solenoid actuated

• Mounting: Metric cartridge mounting, no orientation restrictions

• Cavity: 06020 cavity (M20×1.5 thread)

Hydraulic Parameters

• Maximum Operating Pressure: 250 bar (3625 psi)

• Maximum Flow Rate: 19 L/min (5.0 USgpm)

• Internal Leakage: Leakage-free, max. 5 drops/min (0.25 cm³/min @ 350 bar, viscosity 34 mm²/s)

• Hydraulic Fluid: Hydraulic oil to DIN 51524 Part 1 and 2

• Viscosity Range: 10 – 420 mm²/s (cSt)

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

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

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

Electrical Parameters (WSM06020W-01M-C-V-12DG)

• Supply Voltage: 12 VDC (DC solenoid)

• Rated Current: 1.5 A @ 12 V DC

• Voltage Tolerance: ± 15% of nominal voltage

• Coil Duty Rating: Continuous (up to max. 115% of nominal voltage at 60°C ambient temperature)

• Response Time (Energized): approx. 35 ms

• Response Time (De-energized): approx. 50 ms

• Electrical Connector: Plug acc. to DIN EN 175301-803 (DG)

• Coil Protection: Coil seals protect the solenoid system

Electrical Parameters (WSM06020W-01M-C-N-24DG)

• Supply Voltage: 24 VDC (DC solenoid)

• Rated Current: 0.8 A @ 24 V DC

• Voltage Tolerance: ± 15% of nominal voltage

• Coil Duty Rating: Continuous (up to max. 115% of nominal voltage at 60°C ambient temperature)

• Response Time (Energized): approx. 35 ms

• Response Time (De-energized): approx. 50 ms

• Electrical Connector: Plug acc. to DIN EN 175301-803 (DG)

Materials & Construction

• Valve Body: Free-cutting steel

• Poppet: Hardened and ground steel

• Seals: NBR (standard, for mineral-based hydraulic oil) / FKM (optional, media temperature range -20°C to +120°C)

• Back-up Rings: PTFE

• Coil: Steel / polyamide

• Surface Treatment: External surfaces zinc-plated and corrosion-proof

Weight

• Valve Complete: approx. 0.33 kg

• Coil Only: approx. 0.19 kg

Model Code Description (WSM06020W-01M-C-V-12DG)

• WSM06020W: Basic model, 2/2 directional poppet valve, metric cartridge

• 01: Standard type

• M: Manual override (push override)

• C: Cartridge only

• V: Seal material FKM (Viton)

• 12: 12 VDC supply voltage

• DG: Plug acc. to DIN EN 175301-803

Key Technical Advantages

1. Direct-Acting Normally Closed Design for High Reliability On/Off Control
The WSM06020W-01M-C-V-12DG features a direct-acting normally closed design that blocks flow in both directions when the solenoid is de-energized and allows free flow in both directions when energized. This characteristic makes the valve particularly suitable for hydraulic circuits requiring safety shut-off or load holding, automatically blocking flow in the event of power loss to ensure system safety. The hardened and ground steel poppet ensures minimal wear and extended service life while providing excellent sealing performance with internal leakage of only 5 drops/min (0.25 cm³/min @ 350 bar), achieving near leak-free sealing.

2. CFD-Optimized Flow Path for Low Pressure Drop
The valve’s internal flow paths are CFD (Computational Fluid Dynamics) optimized, maximizing flow area and effectively reducing pressure loss. At the rated flow of 19 L/min, pressure drop is significantly lower than comparable products, reducing system energy loss and fluid temperature rise while improving overall hydraulic system efficiency. CFD optimization also ensures smooth flow paths, reducing turbulence and local resistance losses.

3. Wet Armature Solenoid with Coil Seal Protection
The valve employs a high-performance HYDAC solenoid with excellent switching performance. Coil seals effectively protect the solenoid system against water ingress and contaminants, adapting to humid and dusty industrial environments. The solenoid is DC-powered and can also be fed with AC power supply via a bridge rectifier built into the coil. The 12 VDC model draws 1.5 A, and the 24 VDC model draws 0.8 A, with low power consumption and minimal temperature rise. The coil duty rating is continuous (up to 115% of nominal voltage at 60°C ambient temperature).

4. Compact Design for Space-Saving Installation
The WSM06020W series features a metric cartridge mounting design (cavity 06020 / M20×1.5 thread) with a complete valve weight of only approximately 0.33 kg. The compact design saves installation space, making it particularly suitable for installation in connection housings and control blocks. There are no orientation restrictions for installation flexibility. External surfaces are zinc-plated for corrosion protection in harsh industrial environments.

5. 100% Simulated Working Condition Testing and Drop-in Interchangeability
Every WSM06020W series valve undergoes 100% bench testing prior to shipment, covering 250 bar rated pressure holding, directional response time measurement, internal leakage verification, and solenoid response characterization. Mounting dimensions, cavity specifications, electrical interfaces, and performance curves are strictly matched to the original HYDAC valve, enabling direct drop-in replacement without modifying piping or control programs. MTTFd is 150 years (per DIN EN ISO 13849-1), ensuring long-term reliable operation.

Application Areas

• Hydraulic Power Units: As pilot control or safety shut-off valve, controlling main oil circuit on/off

• Industrial Hydraulic Systems: Hydraulic circuits requiring load holding or safety shut-off

• Machine Tools: CNC hydraulic clamping systems, safety circuit control

• Injection Molding Machines: Safety door control, mold protection circuits

• Presses: Hydraulic overload protection, safety unloading circuits

• Wind Power Generation: Yaw brake systems, safety brake circuits

• Marine Hydraulics: Steering gear safety control, deck machinery hydraulic systems

• Testing Equipment: Material testing machine safety shut-off circuits

Expert Maintenance Tips

Installation Guidelines

1. The WSM06020W series features metric cartridge mounting (cavity 06020 / M20×1.5 thread) with no orientation restrictions. Before installation, confirm cavity dimensions meet specifications and threads are clean and undamaged. Recommended tightening torque should follow HYDAC cavity machining standards, tightened diagonally in stages.

2. Thoroughly flush all piping circuits before installation. Ensure no welding slag, metal chips, or particulate contaminants remain. Prior to first operation, circulate the system through a 10 μm filter element for a minimum of 30 minutes. Recommended fluid cleanliness is ISO 4406 21/19/16 or better.

3. Electrical connections must use a plug conforming to DIN EN 175301-803 (DG) to maintain IP65 protection. Control signal cables should be shielded, with the shield grounded at one end to prevent electromagnetic interference causing spool oscillation.

4. Caution: No orifice is permitted just before port 1, as this may affect valve operation.

Routine Maintenance Procedures

1. Fluid Cleanliness Management: Maintain system fluid cleanliness at ISO 4406 21/19/16 or better. Check fluid particulate contamination every 500 operating hours and replace filter elements and hydraulic fluid when contamination exceeds limits.

2. Solenoid Electrical Inspection: Periodically inspect connectors for seal integrity and terminal tightness. The 12 VDC model draws 1.5 A and the 24 VDC model draws 0.8 A. Measure coil resistance and replace the coil if deviation exceeds ± 10%. Voltage tolerance is ± 15% of nominal voltage; monitor supply voltage to ensure it remains within allowable range.

3. Shifting Performance Verification: Periodically check each position for smooth shifting and absence of binding. If shifting response becomes sluggish or internal leakage exceeds 5 drops/min @ 350 bar, inspect poppet wear and fluid contamination levels.

4. Seal Replacement: Standard NBR seals compatible with mineral-based hydraulic fluids. FKM seals (code V) extend media temperature range to -20°C to +120°C. Under normal operating conditions, replace valve seals every 3,000-5,000 operating hours.

5. Manual Override Maintenance: Periodically check that the push-type manual override (code M) is in the non-activated state to prevent accidental poppet shifting. Verify proper reset after manual operation.

6. Coil Replacement: Coil replacement does not cause leakage from the hydraulic system. The coil can be replaced separately (coil only weight approx. 0.19 kg) without removing the valve body.