WSM06020Y-01M-C-N-24DG | Hydac Solenoid Valve 350bar 40L/min

Product Overview

The WSM06020Y-01M-C-N-24DG, WSM06020V-01M-C-N-24DG, and WSM06020Z-01M-C-N-24DG are core models in the HYDAC WSM06020 series of 2/2 solenoid directional valves, featuring metric cartridge construction compatible with the 06020 standard cavity. These valves are designed to control the start, stop, and direction of fluid flow in hydraulic systems for mobile and industrial applications.

Functional and Structural Differences:

• WSM06020Y-01M-C-N-24DG: Pilot-operated poppet type, normally open. When de-energized, flow is permitted from port 2 to port 1; when energized, the valve closes. Maximum flow: 40 L/min.

• WSM06020V-01M-C-N-24DG: Direct-acting poppet type, normally open. When de-energized, flow is permitted in both directions; when energized, flow is blocked in both directions. Maximum flow: 20 L/min.

• WSM06020Z-01M-C-N-24DG: Pilot-operated poppet type, normally closed. When de-energized, flow is blocked; when energized, the valve opens.

Model Code Breakdown (using WSM06020Y-01M-C-N-24DG as an example)：

• WSM: Directional Seat Valve, metric

• 06020: Cavity designation (2-way cavity)

• Y / V / Z: Function code (Y=pilot-operated normally open, V=direct-acting normally open, Z=pilot-operated normally closed)

• 01: Standard model

• M: With manual override

• C: Cartridge valve

• N: NBR seals (standard)

• 24: 24V DC

• DG: DIN connector per EN175301-803

As original HYDAC solenoid cartridge valves, these products offer complete interchangeability within the same series and cavity, requiring no modifications to manifold designs.

Technical Specifications 

WSM06020Y-01M-C-N-24DG Specifications:

• Model: WSM06020Y-01M-C-N-24DG

• Brand: HYDAC

• Product Type: 2/2 Solenoid Directional Valve

• Valve Type: Pilot-Operated Poppet Type

• Normal Position: Normally Open

• Cavity: 06020

• Maximum Operating Pressure: 350 bar (5075 psi)

• Nominal Flow Rate: 40 L/min

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

• Media Temperature Range: -20°C to +120°C

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

• Hydraulic Fluid: Hydraulic oil per DIN 51524 Parts 1, 2, and 3

• Viscosity Range: 10–420 mm²/s

• Coil Voltage: 24V DC

• Current Draw (@ 20°C): 0.8 A

• Voltage Tolerance: ±15%

• Duty Rating: Continuous (100%), up to 115% rated voltage @ 60°C ambient

• Response Time: Energized approx. 50 ms / De-energized approx. 35 ms

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

• Valve Body Material: High tensile steel

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

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

WSM06020V-01M-C-N-24DG Specifications:

• Model: WSM06020V-01M-C-N-24DG

• Brand: HYDAC

• Product Type: 2/2 Solenoid Directional Valve

• Valve Type: Direct-Acting Poppet Type

• Normal Position: Normally Open

• Cavity: 06020

• Maximum Operating Pressure: 350 bar

• Nominal Flow Rate: 20 L/min

• Internal Leakage: Leakage-free

• Media Temperature Range: -20°C to +120°C

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

• Hydraulic Fluid: Hydraulic oil per DIN 51524 Parts 1 and 2

• Viscosity Range: 10–420 mm²/s

• Coil Voltage: 24V DC

• Current Draw (@ 20°C): 0.8 A

• Voltage Tolerance: ±15%

• Duty Rating: Continuous (100%), up to 115% rated voltage @ 60°C ambient

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

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

• Valve Body Material: High tensile steel; hardened and ground components

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

• Weight: Approx. 0.33 kg

WSM06020Z-01M-C-N-24DG Specifications:

• Model: WSM06020Z-01M-C-N-24DG

• Brand: HYDAC

• Product Type: 2/2 Solenoid Directional Valve

• Valve Type: Pilot-Operated Poppet Type

• Normal Position: Normally Closed

• Cavity: 06020

• Maximum Operating Pressure: 350 bar

• Nominal Flow Rate: 40 L/min

Key Technical Advantages

1. Wet-Type Solenoid Design for Quiet, Long-Life Operation

The WSM06020 series features an oil-immersed solenoid armature design—the movable iron core operates fully submerged in hydraulic oil. The hydraulic oil lubricates moving parts to reduce wear and cushions switching impact and vibration. This ensures extended service life and extremely low noise levels. Solenoid coils can be rotated 360° and replaced without opening the hydraulic system.

2. Hardened and Ground Control Elements for Superior Wear Resistance

Critical control elements such as poppets and seats are hardened and precision ground. The poppet-type seat valve design shuts off flow paths via a cone seat in the closed position, ensuring extremely low internal leakage (max. 5 drops/min).

3. Compact Cartridge Design for Space-Saving Installation

The metric cartridge construction enables direct installation in connection housings and control blocks for space-saving installation. The compact design significantly reduces external tubing and fittings, minimizing leakage risk and installation space requirements.

4. Superior Corrosion Resistance

All exposed surfaces are zinc-plated; WSM06020Y-01 features zinc-nickel coating that passes 1,000-hour salt spray testing for excellent corrosion resistance. Built-in coil seals effectively prevent moisture ingress into the solenoid system.

5. Flexible Electrical Connection and Voltage Options

Supports 24V DC supply (0.8 A current draw) with ±15% voltage tolerance. Equipped with DIN connector per EN175301-803. AC voltage can be rectified using a bridge rectifier built into the coil.

6. Integrated Manual Override

All models feature a manual override for emergency operation. In case of power failure or emergency, the spool can be manually actuated for emergency directional control, ensuring system safety.

Application Areas

WSM06020Y-01M-C-N-24DG (Pilot-Operated Normally Open, 40 L/min):

• Construction Machinery — Hydraulic system control for excavators, loaders, and mobile equipment

• Industrial Hydraulic Systems — Various high-flow normally open control applications

• Presses and Forging Equipment — Safety and directional control for hydraulic systems

• Injection Molding Machinery — On/off control for auxiliary oil circuits

WSM06020V-01M-C-N-24DG (Direct-Acting Normally Open, 20 L/min):

• Machine Tool Hydraulics — Directional and on/off control for medium/low-flow actuators

• Material Handling Equipment — Hydraulic control for forklifts and lifting platforms

• Test Benches and Test Equipment — Hydraulic test circuits requiring fast response

• Safety Interlock Devices — Safety control circuits that remain open when de-energized

WSM06020Z-01M-C-N-24DG (Pilot-Operated Normally Closed, 40 L/min):

• Construction Machinery — Safety control systems requiring flow shut-off when de-energized

• Industrial Automation — Safety shut-off and directional control for actuators

• Hydraulic Power Units (HPU) — System unloading and pressure release control

• Safety Interlock Devices — Safety protection circuits that automatically shut off when de-energized

Expert Maintenance Tips

1. Installation Guidelines

• Thoroughly clean the cavity (06020 cavity) and valve exterior before installation to prevent foreign particles from entering and causing seal damage or spool sticking.

• Installation torque: Coil lock nut torque 4 N·m, maximum 10.8 N·m.

• No orientation restrictions—any installation orientation is acceptable based on manifold design requirements.

• Cartridge valves can be installed directly in connection housings and control blocks without external piping.

2. Hydraulic Fluid Cleanliness

• Recommended fluid cleanliness: ISO 4406 Class 21/19/16 or cleaner.

• Use hydraulic oil meeting DIN 51524 Parts 1, 2, and 3.

• Viscosity range: 10–420 mm²/s.

• Media temperature range: -20°C to +120°C.

3. Electrical Connection Specifications

• All models use 24V DC supply with current draw of 0.8 A (@ 20°C).

• Voltage tolerance: ±15%.

• Connector type: DIN EN 175301-803 standard.

• Coils are rated for continuous duty (100%), capable of operating at 115% of nominal voltage at 60°C ambient.

• Coils can be rotated 360° and replaced without opening the hydraulic system.

4. Reverse Flow Considerations (Pilot-Operated Normally Open)

• WSM06020Y-01 allows free flow from port 2 to port 1 when de-energized. In the reverse direction (port 1 to port 2), flow is permitted when the hydraulic force on the spool exceeds the solenoid force (approx. 9–20 bar).

• This reverse opening characteristic should be carefully considered during system design.

5. Periodic Maintenance Inspection

• Inspect the valve body for external oil leakage every 2,000 operating hours or at least annually.

• Check electrical connectors for looseness, oxidation, or moisture ingress.

• Solenoid coils can be replaced quickly without opening the hydraulic system.

• If response lag or unstable shifting is observed, first check system fluid cleanliness and spool seal condition.

• For seal replacement: Standard NBR seals are suitable for -20°C to +100°C; FKM seals are optional for -20°C to +120°C.