FESTO MHE3-MS1H-320-18-K Solenoid Valve | 3/2 Closed, Monostable, G1/8 Port Specs

FESTO MHE3-MS1H-320-18-K solenoid valve specifications. 3/2-way closed monostable, G1/8 ports, electrical actuation, 200 l/min flow rate, 0-8 bar operating pressure. For pneumatic automation systems.

FESTO MHE3-MS1H-320-18-K Solenoid Valve

The FESTO MHE3-MS1H-320-18-K​ is a 3/2-way closed monostable solenoid valve​ from the MHE3 series, featuring G1/8 threaded ports​ and electrical actuation. This compact pneumatic valve is designed for industrial automation applications, providing reliable switching of compressed air flow in 3-port, 2-position configurations. With direct-acting poppet valve design, mechanical spring return, and IP65 protection, it is suitable for applications requiring precise control in machine automation, packaging equipment, and material handling systems. The "320" designation indicates 3/2-way closed function, while "18" specifies G1/8 port connections.

Key Features

• 3/2-Way Valve Function:​ Three ports, two positions (closed monostable, spring return)

• Electrical Actuation:​ Solenoid coil operation (24V DC standard)

• G1/8 Threaded Ports:​ Standard G1/8 (ISO 1179) connections on all ports

• Manual Override:​ Manual operation capability for testing and maintenance

• Compact Design:​ 14 mm construction width for space-saving installation

• Standard Flow Rate:​ 200 l/min nominal flow capacity

• Wide Operating Pressure:​ 0 to 8 bar operating range

• Direct-Acting Poppet Valve:​ Fast response and reliable operation

• IP65 Protection:​ Dust-tight and water-resistant housing

• Robust Construction:​ Die-cast zinc housing for industrial durability

Technical Specifications

Note: Specifications are based on FESTO MHE3 series technical documentation and industry standards. The "MHE3-MS1H-320-18-K" model specifically indicates 3/2-way closed function, G1/8 ports, and electrical actuation. The "320" notation is an alternative designation for "3/2G" (3/2-way closed).

Model Number Decoding (MHE3-MS1H-320-18-K)

• MHE3:​ Series designation (MHE3 solenoid valve series)

• MS1H:​ Actuator type designation (solenoid with manual override)

• 320:​ Valve function (3/2-way closed configuration - alternative notation for "3/2G")

• 18:​ Port connection type (G1/8 thread)

• K:​ Option suffix (typically indicates cable connection or specific variant)

Note:​ The "320" is an alternative notation used in some documentation systems, equivalent to "3/2G" (3/2-way closed). The "18" indicates G1/8 thread size on all ports. The "K" suffix typically specifies cable connection or specific variant options. Solenoid coil voltage must be specified separately (24V DC is standard, but other voltages may be available).

Key Differences from Similar Models

Compared to other MHE3 series valves:

• MHE3-MS1H-320-18-K:​ 3/2-way closed, G1/8 ports, electrical actuation​ (this model)

• MHE3-MS1H-3/2G-1/8-K:​ Same configuration as above (different notation)

• MHE3-MS1H-3/2O-1/8-K:​ 3/2-way open function (different flow path)

• MHE3-MS1H-5/2-1/8-K:​ 5/2-way function (different port configuration)

• MHE3-MS1H-320-QS-6-K:​ Same function with QS-6 push-in ports

• MHE3-M1H-320-18-K:​ Without manual override (different actuator type)

The 3/2-way closed function​ means the valve is normally closed (no flow from supply to outlet when de-energized). The G1/8 ports​ provide standard threaded connections for most industrial pneumatic systems. The electrical actuation​ requires a solenoid coil (typically 24V DC) for operation.

Typical Applications

• Industrial Automation:​ Control of pneumatic actuators and cylinders

• Packaging Machinery:​ Air flow control in packaging and filling equipment

• Material Handling:​ Pneumatic control in conveyor systems

• Machine Tools:​ Tool clamping and positioning systems

• Process Control:​ Air flow regulation in industrial processes

• Assembly Equipment:​ Pneumatic control in automated assembly lines

• Test and Commissioning:​ Manual override for system testing

Important Selection & Installation Notes

1. Valve Function:​ This is a 3/2-way normally closed valve. When de-energized, the supply port is blocked, and the outlet port is exhausted. When energized, supply connects to outlet.

2. Port Configuration:​ All ports are G1/8 male thread. Confirm the thread type (G1/8, R1/8, or NPT1/8) for your system. Use appropriate thread sealant if required.

3. Electrical Connection:​ The solenoid coil is typically included with cable connection (2.5 m length). Verify the coil voltage (24V DC standard) matches your control system.

4. Operating Pressure:​ Do not exceed 8 bar maximum operating pressure. The minimum operating pressure is 0 bar.

5. Flow Direction:​ The valve has a specific flow direction (typically indicated by arrow). Install with correct orientation.

6. Air Quality:​ Use filtered, lubricated or non-lubricated compressed air according to ISO 8573-1:2010. If using lubricated air, maintain consistent lubrication.

7. Mounting:​ Can be mounted with through-hole mounting. Ensure proper alignment and avoid excessive force during installation.

8. Temperature Range:​ Do not operate outside -5°C to +60°C media temperature or ambient temperature.

9. Flow Capacity:​ The 200 l/min flow rate is suitable for standard pneumatic applications. Verify your system flow requirements.

10. Manual Override:​ The valve includes manual override capability. Use for testing and maintenance, but ensure the system is depressurized before manual operation.

11. Switching Frequency:​ Maximum switching frequency is 280 Hz. Do not exceed this limit in continuous operation.

12. Maintenance:​ Regular inspection for leaks is recommended. Check for proper sealing and smooth operation.

Note: For complete installation guidelines, dimensional drawings, and detailed technical data, consult the official FESTO MHE3 Series Technical Manual​ or contact FESTO technical support. Always verify the exact model number configuration with the manufacturer, as notation variations may occur in different documentation systems.