WSM10120Y-01-C-N-24DG | HYDAC Solenoid Valve 350bar 75L/min

Product Overview

The WSM10120Y-01-C-N-24DG is a core model in the HYDAC WSM10120Y series of 2/2 solenoid directional poppet valves, featuring metric cartridge construction compatible with the 10120 standard cavity. This pilot-operated poppet type, normally open valve is designed to control the start, stop, and direction of fluid flow in hydraulic systems for mobile and industrial applications.

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 (WSM10120Y-01-C-N-24DG):

• WSM: Directional Seat Valve, metric

• 10120: Cavity designation / Nominal Size (2-way cavity, Size 10)

• Y: Function code — Pilot-Operated Normally Open

• 01: Standard model

• C: Cartridge valve

• N: NBR seals (standard)

• 24: 24V DC

• DG: DIN connector per EN 175301-803

About WSM Series:

The HYDAC WSM series covers multiple sizes including WSM06, WSM08, WSM10, and WSM12:

• WSM06 (Size 6, 06020 cavity): Flow 2–40 L/min

• WSM08 (Size 8): Flow up to 22 L/min

• WSM10 (Size 10, 10120 cavity, this model): Flow 4–75 L/min

• WSM12 (Size 12, 12120 cavity): Flow up to 110 L/min

The WSM10120Y is a pilot-operated, normally open poppet valve—when de-energized, flow is permitted in one direction; when energized, the valve closes. The series also includes V type (direct-acting normally open) , Z type (pilot-operated normally closed) , and YR type (pilot-operated normally open, reverse flow) variants.

Technical Specifications 

WSM10120Y-01-C-N-24DG Specifications:

• Model: WSM10120Y-01-C-N-24DG

• Material Number: 3178525

• Coil Part Number: 3000249

• Brand: HYDAC

• Product Type: 2/2 Solenoid Directional Poppet Valve

• Valve Type: Pilot-Operated Poppet Type

• Normal Position: Normally Open

• Cavity / Nominal Size: 10120 / Size 10

• Maximum Operating Pressure: 350 bar (5075 psi) 

• Pressure Range: 5–350 bar

• Maximum Flow Rate: 75 L/min

• Flow Rate Range: 4–75 L/min

• Internal Leakage: Leakage-free

• 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: 10–420 mm²/s

• Coil Voltage: 24V DC

• Current Draw (@ 20°C): 0.8 A

• Voltage Tolerance: ±15%

• Duty Rating: Continuous (100%) 

• Switching Time: Open approx. 35 ms / Close approx. 80 ms

• Recommended Filtration: ISO 4406 21/19/16

• Control Type: Pilot-Operated

• Installation Type: Metric Cartridge

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

• Connector Type: DIN EN 175301-803

• Manual Override: None (standard model)

• Body Material: High tensile steel

• Spool Material: Hardened and ground steel

• Surface Treatment: Zinc-plated

• Mounting Position: Any

• Weight: Valve complete 0.37 kg / Coil only 0.19 kg

Key Technical Advantages

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

The WSM10120Y features pilot-operated poppet construction—in the closed position, the poppet achieves metal-to-metal sealing against the seat, providing leakage-free performance. Unlike spool-type valves, the poppet design delivers zero internal leakage in the closed state, making it ideal for applications requiring long-term actuator position holding.

2. 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. This ensures extended service life and extremely low noise levels. Coils can be replaced without opening the hydraulic system.

3. 350 bar High Pressure and 75 L/min High Flow Capacity

Delivers 350 bar maximum operating pressure and 75 L/min flow capacity in a compact Size 10 cartridge package. Pressure range covers 5–350 bar—a single valve type meets full-range control requirements from low to high pressure.

4. Hardened and Ground Spool for Superior Wear Resistance

The spool 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. 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.

6. 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 control for high-pressure roller press hydraulic systems

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

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

• Industrial Hydraulic Systems — Various applications requiring precise pressure and flow control

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

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

• Paper and Marine Equipment — Hydraulic control for large industrial equipment

• Automotive and Power Equipment — Hydraulic actuator control for automated production lines

Expert Maintenance Tips

1. Installation Guidelines

• Thoroughly clean the cavity (10120 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.

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: 10–420 mm²/s.

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

3. Electrical Connection Specifications

• WSM10120Y-01-C-N-24DG uses 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%) , supporting 24/7 operation.

• For AC supply, select coils with built-in bridge rectifier.

4. Reverse Flow Characteristics (Normally Open)

• WSM10120Y-01 allows free flow in one direction when de-energized (normally open characteristic).

• At approximately 1.5 bar differential pressure, the poppet opens to allow reverse flow (check valve function).

• This reverse flow 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.

• Standard NBR seals are suitable for most mineral oil systems; for phosphate ester or other specialty fluids, select FKM seal option.