T22EH-B6H | SUMMER Solenoid Valve 31.5MPa 6mm NG6

Product Overview

The T22EH-B6H and T22BH-B6H are wet-type solenoid directional valves from Taiwan SUMMER, 6mm size (NG6), with mounting pattern conforming to ISO 4401 international standards—directly interchangeable with YUKEN, Rexroth, and other major brands. These valves feature direct-acting solenoid spool control, primarily used for start, stop, and directional control of hydraulic actuators, and can also serve as pilot valves for high-power hydraulic valves.

Key Difference Between T22EH-B6H and T22BH-B6H:

The core difference lies in the solenoid type—per SUMMER series naming, “E” denotes wet-type DC, while “B” denotes wet-type AC. T22EH-B6H is designed for DC power systems (12V/24V), while T22BH-B6H is designed for AC power systems (110V/220V/230V/380V, etc.). Both models share identical mounting dimensions, size specifications, and pressure ratings.

As original SUMMER solenoid directional valves, these products offer complete interchangeability within the same series and size, requiring no modifications to mounting interfaces or piping layouts.

Model Code Breakdown (using T22EH-B6H as an example):

• T22: Series code

• E / B: Solenoid type (E=wet DC; B=wet AC)

• H: Spool function — Normally Closed

• B6H: Configuration code (B6=6mm size; H=normally closed)

• Voltage Options: Supports DC12V, DC24V, AC110V, AC220V, AC230V, AC380V, AC250V

Technical Specifications 

T22EH-B6H / T22BH-B6H Series Common Specifications:

• Brand: SUMMER (Taiwan)

• Series: T22 Series

• Product Type: Wet-Type Solenoid Directional Valve

• Spool Configuration: 2-way 2-position / 4-way 2-position / 4-way 3-position

• Spool Function: H Type — Normally Closed

• Nominal Size: 6 mm (6 size) 

• Mounting Standard: ISO 4401 (interchangeable with YUKEN, Rexroth)

• Maximum Operating Pressure: 31.5 MPa (315 bar / 4568 psi) 

• Compatible Media: Mineral hydraulic oil, water-containing working fluid

• Fluid Temperature Range: -20°C ~ +70°C (mineral hydraulic oil)

• Viscosity Range: 10~350 mm²/s

• Effective Area: 20 mm²

• Maximum Operating Frequency: 10 cycles/min

• Body Material: Steel

• Control Type: Electric (direct solenoid actuation)

• Mounting Type: Subplate mounting

• Protection Class: IP65

• Explosion-Proof: Explosion-proof construction

• Application Fields: Environmental, chemical, biotech, agriculture, petroleum

T22EH-B6H (Wet-Type DC) Specifications:

• Model: T22EH-B6H

• Solenoid Type: Wet-Type DC

• Recommended Voltage: DC12V, DC24V

• Typical Application: DC power systems, mobile equipment

T22BH-B6H (Wet-Type AC) Specifications:

• Model: T22BH-B6H

• Solenoid Type: Wet-Type AC

• Recommended Voltage: AC110V, AC220V, AC230V, AC380V, AC250V

• Typical Application: AC power systems, industrial stationary equipment

Voltage Options:

The series offers complete voltage coverage:

• DC: 12V, 24V

• AC: 110V, 220V, 230V, 250V, 380V

Key Technical Advantages

1. 31.5 MPa High Pressure Capability for Heavy-Duty Applications

The T22 series delivers 31.5 MPa (315 bar) maximum operating pressure. This performance places it at the forefront of 6mm size solenoid valves, suitable for demanding medium-to-high pressure hydraulic systems—particularly rail clamps, bucket wheel reclaimers, and other heavy industrial equipment.

2. Explosion-Proof Construction for Hazardous Environments

The T22EH/T22BH series features explosion-proof construction—all components that could ignite explosive gas mixtures are enclosed in a flameproof housing capable of containing internal explosions without igniting the external atmosphere. Particularly suitable for coal mining, petroleum, and chemical applications in flammable and explosive environments.

3. Complete Voltage Coverage for Global Compatibility

The T22 series offers comprehensive voltage options including DC12V, DC24V, AC110V, AC220V, AC230V, AC380V, AC250V. Whether for low-voltage DC systems in mobile equipment or AC-powered industrial systems, a matching model is available. T22EH-B6H (DC type) and T22BH-B6H (AC type) correspond to DC and AC power requirements respectively.

4. International Standard Compliance for Direct Interchangeability

Mounting conforms to ISO 4401 international standards, offering complete interchangeability with YUKEN, Rexroth, and other major brands. Direct replacement without manifold modifications simplifies equipment maintenance and spare parts management.

5. Wide Temperature and Viscosity Tolerance

Fluid temperature range covers -20°C ~ +70°C (mineral hydraulic oil) with viscosity range of 10~350 mm²/s. Suitable for diverse extreme climate conditions and various oil types.

6. IP65 Protection for Demanding Environments

IP65 protection ratingeffectively resists dust ingress and water jets from any direction. The combination of explosion-proof housing and IP65 protection makes it particularly suitable for ports, mines, power plants, and other dust-prone and humid environments.

Application Areas

• Port Crane Rail Clamps — Wind brake hydraulic control

• Bucket Wheel Reclaimer Rail Clamps — Travel gear wind brake control

• Gantry Crane Rail Clamps — Wind safety devices for large lifting equipment

• Coal Mine Explosion-Proof Hydraulic Systems — Underground explosion-proof solenoid control

• Construction Machinery Hydraulics — Directional control for excavators, loaders, and mobile equipment

• Industrial Automation Equipment — Start, stop, and directional control of hydraulic actuators

• Pilot Valve for High-Power Hydraulic Valves — Pilot control for high-flow main valves

Expert Maintenance Tips

1. Voltage Selection Confirmation

• T22 series offers DC12V, DC24V, AC110V, AC220V, AC230V, AC380V, AC250V voltage options.

• T22EH-B6H is wet-type DC—suitable for DC power systems; T22BH-B6H is wet-type AC—suitable for AC power systems.

• Verify supply voltage matches coil nameplate voltage before connection.

2. Installation Guidelines

• Mounting surface must conform to ISO 4401 standards.

• Thoroughly clean the mounting surface and all ports before installation to prevent foreign particles from entering and causing spool sticking or seal damage.

• Valve body is steel—ensure seals are intact during installation.

• This valve is 6mm size—use corresponding subplate and mounting bolts.

3. Hydraulic Fluid Management

• Compatible media: Mineral hydraulic oil, water-containing working fluid.

• Fluid temperature range: Mineral hydraulic oil -20°C ~ +70°C.

• Viscosity range: 10~350 mm²/s.

• Install a return line filter with minimum 10 μm filtration rating.

4. Explosion-Proof Environment Precautions

• T22EH/T22BH series features explosion-proof construction, suitable for coal mining, petroleum, chemical, and other hazardous environments.

• Ensure electrical connections comply with relevant hazardous area regulations.

• Periodically inspect explosion-proof housing sealing and integrity.

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.

• If response lag or unstable shifting is observed, first check system fluid cleanliness and verify the spool is not sticking.

• Solenoid coils can be replaced without disturbing hydraulic connections.