WSM06020Z-01-C-N-24DG | HYDAC Solenoid Valve 350bar 40L/min

Product Overview

The WSM06020Z-01-C-N-24DG (Material Number 3055428， Coil Part Number 3000249) is a classic model in the HYDAC WSM06020Z series of 2/2 pilot-operated solenoid directional poppet valves. Featuring metric cartridge construction compatible with the 06020 standard cavity， this pilot-operated poppet type， normally closed valve provides 2-way, 2-position directional control.

The valve is designed to control the start and stop of fluid flow in hydraulic systems for mobile and industrial applications. The valve body is constructed from high tensile steel with hardened and ground poppet components， and all external surfaces are zinc-plated for corrosion resistance. The valve is leakage-free (max. 5 drops/min).

As an original HYDAC solenoid cartridge valve, this product offers complete interchangeability within the same series and cavity, requiring no modifications to manifold designs.

Model Code Breakdown (WSM06020Z-01-C-N-24DG)：

• WSM: Directional Seat Valve, metric

• 06020: Cavity designation (2-way cavity, Size 6)

• Z: Function code — Pilot-Operated Normally Closed

• 01: Standard model

• C: Cartridge valve

• N: NBR seals (standard)

• 24DG: 24V DC, DIN connector per EN 175301-803

Technical Specifications 

• Model: WSM06020Z-01-C-N-24DG

• Material Number: 3055428

• Coil Part Number: 3000249

• Brand: HYDAC

• Product Type: 2/2 Pilot-Operated Solenoid Poppet Valve

• Valve Type: Pilot-Operated Poppet Type

• Normal Position: Normally Closed — valve closed when de-energized

• Cavity / Nominal Size: 06020 / Size 6

• Maximum Operating Pressure: 350 bar (5075 psi) 

• Pressure Range: 5–350 bar

• Maximum Flow Rate: 40 L/min

• Flow Rate Range: 2–40 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: Per DIN 51524 Parts 1 and 2

• Viscosity Range: 7.4–420 mm²/s

• Recommended Filtration: ISO 4406 21/19/16

• Coil Voltage: 24V DC

• Nominal Current (@ 20°C): 0.8 A

• Voltage Tolerance: ±15%

• Duty Rating: 100% ED (Continuous) ， up to 115% nominal voltage at 60°C ambient

• Switching Time: On approx. 35 ms / Off approx. 25 ms

• Mounting Position: Any

• Control Type: Pilot-Operated

• Installation Type: Metric Cartridge

• Seal Material: NBR (standard)

• Connector Type: DIN EN 175301-803

• Manual Override: None (this model)

• Body Material: High tensile steel

• Surface Treatment: Zinc-plated

• Threaded Cavity: M20 × 1.5_06020

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

Key Technical Advantages

1. Pilot-Operated Poppet Construction — Leakage-Free Sealing

The WSM06020Z-01-C-N-24DG features pilot-operated poppet construction. In the closed position, the poppet achieves metal-to-metal sealing against the seat. Unlike spool-type valves, the poppet design delivers leakage-free performance， with maximum leakage of only 5 drops/min (0.25 cm³/min) at 350 bar, making it ideal for applications requiring long-term actuator position holding.

2. Pilot-Operated Structure — High Flow with Precise Control

Features pilot-operated construction — the main stage is controlled by the pilot stage. Compared to direct-acting designs, pilot-operated structures enable high flow control with smaller solenoid drive force. Maximum flow reaches 40 L/min. The pilot-operated principle enables operation even under zero differential pressure.

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

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. The HYDAC high-performance solenoid delivers excellent switching performance. Coils can be replaced without opening the hydraulic system. Built-in coil seals effectively prevent moisture ingress.

4. Hardened and Ground Poppet for Superior Wear Resistance

The poppet is hardened and precision ground. High-precision machining of critical control elements ensures long-term sealing performance and extremely low internal leakage， significantly extending valve service life.

5. 350 bar High Pressure and 40 L/min Flow Capacity

Delivers 350 bar (5075 psi) maximum operating pressure and 40 L/min maximum flow in a compact Size 6 cartridge package. Pressure range covers 5–350 bar， suitable for precise directional control in diverse medium-to-high pressure hydraulic systems.

6. Compact Cartridge Design for Space-Saving Installation

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

7. Superior Corrosion Resistance and Protection

All exposed surfaces are zinc-plated. Built-in coil seals effectively prevent moisture ingress into the solenoid system. Media temperature range covers -20°C to +120°C， suitable for diverse extreme climate conditions and high-temperature hydraulic systems.

Application Areas

• Cement Plant Roller Press Control Systems — Precision directional control for high-pressure roller press hydraulic systems

• Steel and Metallurgical Equipment — Directional control for rolling mills, continuous casting machines, and heavy-duty systems

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

• Industrial Hydraulic Systems — Various applications requiring precise directional control

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

• Die-Casting Machines — Directional control for high-pressure casting equipment

• Lubrication Systems — Oil circuit control for lubrication stations

• Special Purpose Vehicles — Hydraulic control for garbage trucks, cement trucks, and other specialized vehicles

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.

• Follow HYDAC specifications for installation torque to ensure proper valve seating.

• 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.

• Threaded cavity specification: M20 × 1.5_06020.

2. Hydraulic Fluid Cleanliness

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

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

• Viscosity range: 7.4–420 mm²/s.

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

3. Electrical Connection Specifications

• WSM06020Z-01-C-N-24DG uses 24V DC supply with nominal current of 0.8 A (@ 20°C).

• Voltage tolerance: ±15%.

• Connector type: DIN EN 175301-803 standard.

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

• For AC supply, select coils with built-in bridge rectifier (e.g., 230AG suffix models).

4. Normally Closed Function Considerations

• WSM06020Z-01 is Normally Closed when de-energized — flow is blocked.

• When energized, the valve opens and allows flow.

• This normally closed / energized open function characteristic should be carefully considered during system design.

5. Seal Material Selection

• Standard NBR seals are suitable for -20°C to +100°C.

• For higher temperature applications ( -20°C to +120°C )， select FKM (fluoroelastomer) seal versions.

• Important Note: This model has no manual override. For manual override functionality, select -01M series models (e.g., WSM06020Z-01M-C-N-24DG).

6. 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.

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

• WSM06020Z series features hardened wear-resistant spools — wear is minimal under normal operation.