Product Overview

The SDHE-0713-X24DC is an ATOS direct-operated solenoid directional control valve for hydraulic flow-direction switching and actuator control.

ATOS officially classifies the SDHE as a:

Solenoid directional valve, direct operated, spool type, ISO 4401 Size 06.

The SDHE series uses a three-chamber valve body produced by shell-moulding casting with wide internal passages designed to reduce pressure drops. Its solenoid assembly uses a wet-type screwed tube, with separate constructions for AC and DC power supplies and an integrated manual override pin. ATOS also provides interchangeable coils and a wide range of interchangeable spools.

For the specified SDHE-0713-X24DC, the verified configuration includes:

• ISO 4401 Size 06
• 350 bar maximum pressure
• 80 L/min maximum flow
• 24 VDC solenoid
• Direct-operated spool construction
• Wet-type solenoid tube
• Interchangeable coil
• Integrated manual override

For OEM replacement applications, the key matching parameters include the mounting interface, spool symbol, voltage, connector and seal material.

Our replacement program emphasizes in-situ interchangeability and 100% simulated operating-condition testing.

Technical Specifications (Bulleted List)

SDHE-0713-X24DC

• Manufacturer: ATOS
• Series: SDHE
• Full Model: SDHE-0713-X24DC
• Product Type: Direct-operated solenoid directional valve
• Mounting: Subplate mounting
• Mounting Standard: ISO 4401
• Nominal Size: Size 06
• Maximum Pressure: 350 bar
• Maximum Flow: 80 L/min
• Solenoid Supply: DC
• Solenoid Voltage: 24 VDC
• Solenoid Construction: Wet-type screwed tube
• Manual Override: Integrated manual override pin
• Coil: Interchangeable
• Standard Coil Protection: IP65
• Electrical Connection: DIN 43650 connector, ordered separately according to configuration
• Valve Body: 3-chamber construction
• Casting Process: Shell-moulding casting
• Internal Flow Passages: Wide passages designed for reduced pressure drop
• Spool Type: Spool valve
• Control Principle: Solenoid-operated directional control
• Displacement: Not applicable
• Maximum Rotational Speed: Not applicable.

SDHE-0718-10S

The original title also contains SDHE-0718-10S. The SDHE family classification can be verified, but the complete engineering meaning of the 18 / 10S suffixes was not sufficiently confirmed from the currently available ATOS official public documentation.

Therefore, this model should not be assigned a fabricated spool, flow or pressure specification.

DA20-2-30B/80 Clarification

The original title also contains:

DA20-2-30B/80

Available product information identifies this as a DA20 pilot-operated unloading/pressure-control valve, rather than an SDHE directional valve. The /80 version is associated with an 80 bar pressure range in the available product information.

For SEO and engineering accuracy, DA20-2-30B/80 should be published as a separate product page, not combined with SDHE-0713 specifications.

Key Technical Advantages

1. Direct-Operated Spool Design

The SDHE uses a direct-operated spool architecture in which the solenoid directly actuates the hydraulic spool.

This provides a straightforward solution for directional switching in industrial and mobile hydraulic systems.

2. 350 Bar Pressure Capability

The SDHE series is specified by ATOS for a maximum pressure of 350 bar, supporting demanding high-pressure hydraulic applications.

3. 80 L/min Maximum Flow

ATOS specifies a maximum flow of 80 L/min for the SDHE series.

The actual pressure drop depends on the spool configuration and individual hydraulic flow paths.

4. Three-Chamber Valve Body

The valve body is designed as a three-chamber construction and manufactured by shell-moulding casting, with wide internal flow passages intended to reduce pressure losses.

5. Wet-Type Solenoid Construction

The SDHE employs a wet-type screwed solenoid tube and uses separate AC and DC constructions.

This design is integrated with interchangeable coils and an internal manual override mechanism.

6. Interchangeable Spool Platform

ATOS provides a wide range of interchangeable spools for the SDHE series.

This allows engineers to select the appropriate hydraulic switching function while retaining the same basic valve platform.

7. Replaceable Coils

The interchangeable coil arrangement simplifies field maintenance and allows the electrical portion of the valve to be serviced without replacing the entire hydraulic valve body.

Application Areas

Typical applications include:

• Industrial hydraulic power units
• Machine tools
• Construction equipment
• Concrete machinery
• Material-handling equipment
• Automated hydraulic systems
• Hydraulic clamping circuits
• Hydraulic cylinder control
• Hydraulic motor start/stop circuits
• Mobile hydraulic machinery
• Industrial auxiliary hydraulic systems

Final selection should verify the spool symbol, flow requirement, pressure, voltage, connector and mounting interface.

Expert Maintenance Tips

1. Verify the ISO 4401 Mounting Surface

The SDHE-07 uses an ISO 4401 Size 06 mounting interface.

The mounting surface should be clean and free from scratches, contamination and sealing defects.

2. Match the Correct 24 VDC Coil

ATOS uses different solenoid tube constructions for AC and DC versions.

Therefore, the replacement coil should be matched to the required electrical supply rather than selected by appearance alone.

3. Observe the Manual Override Pressure Limitation

ATOS states that manual override operation is permitted only when T-port pressure is below 50 bar.

Do not force the manual override while the return pressure is above the specified limit.

4. Inspect the Return Circuit

Excessive return-line restriction can increase back pressure and influence system performance.

Check the return hose, filter, manifold and common return circuit during maintenance.

5. Commission the Replacement Gradually

After installation:

Low-pressure test → directional test → leakage check → solenoid test → gradual pressure increase → full-load test

This reduces the risk of hydraulic shock and incorrect spool operation.

6. Maintain Hydraulic Cleanliness

Contamination can interfere with spool movement and increase internal leakage.

Inspect the hydraulic filter and fluid condition whenever an SDHE valve is replaced.

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