FESTO MFH-5-14-S Solenoid Valve | 5/2 Monostable, G1/4 Port, External Pilot Specs

Meta Description:​ FESTO MFH-5-14-S solenoid valve specifications. 5/2-way monostable, G1/4 ports, external pilot actuation, 1000 l/min flow rate, 0-8 bar operating pressure. For pneumatic automation systems.

FESTO MFH-5-14-S Solenoid Valve

The FESTO MFH-5-14-S​ is a 5/2-way monostable solenoid valve​ from the MFH series, featuring G1/4 threaded ports​ and external pilot actuation​ (indicated by the "-S" suffix). This electrically operated directional control valve is designed for industrial pneumatic automation applications, providing reliable switching of compressed air flow in 5-port, 2-position configurations. With external pilot air supply requirement, manual override capability, and compact design, it is suitable for applications requiring precise control in machine automation, packaging equipment, and material handling systems.

Key Features

• 5/2-Way Valve Function:​ Five ports, two positions (monostable spring return)

• External Pilot Actuation:​ Requires separate pilot air supply (2-10 bar)

• G1/4 Threaded Ports:​ Standard G1/4 (ISO 1179) connections on all ports

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

• Compact Design:​ 30.5 mm construction width for space-saving installation

• High Flow Capacity:​ 1000 l/min nominal flow rate

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

• External Pilot Operation:​ Independent pilot air supply for reliable actuation

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

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

Technical Specifications

Note: Specifications are based on FESTO MFH series technical documentation and industry standards. The "MFH-5-14-S" model specifically indicates 5/2-way function, G1/4 ports, and external pilot actuation.

Model Number Decoding (MFH-5-14-S)

• MFH:​ Series designation (Tiger Classic solenoid valve series)

• 5:​ Valve function (5/2-way)

• 14:​ Port connection type (G1/4 thread)

• S:​ Actuation type (external pilot actuation)

Note:​ The "14" indicates G1/4 thread size on all ports. The "S" suffix specifies external pilot actuation, meaning the valve requires a separate pilot air supply (2-10 bar) for operation, rather than internal pilot air. Solenoid coil and electrical connections must be ordered separately.

Key Differences from Similar Models

Compared to other MFH series valves:

• MFH-5-14-S:​ 5/2-way, G1/4 ports, external pilot​ (this model)

• MFH-5-14-B:​ 5/2-way, G1/4 ports, internal pilot (no external pilot required)

• MFH-3-14-S:​ 3/2-way, G1/4 ports, external pilot (different valve function)

• MFH-5-18-S:​ 5/2-way, G1/8 ports, external pilot (smaller port size)

• MFH-5-12-S:​ 5/2-way, G1/2 ports, external pilot (larger port size)

• MFH-5-14:​ 5/2-way, G1/4 ports, standard internal pilot (no "S" suffix)

The external pilot actuation ("-S")​ requires a separate pilot air supply line (2-10 bar) for operation, which provides more reliable actuation in certain applications but adds complexity compared to internal pilot versions. The G1/4 ports​ provide standard threaded connections for most industrial pneumatic systems.

Typical Applications

• Industrial Automation:​ Directional control of pneumatic cylinders and actuators

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

• Material Handling:​ Pneumatic control in conveyor systems and handling equipment

• 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. Pilot Air Requirement:​ This is an external pilot valve​ (indicated by "-S" suffix). It requires a separate pilot air supply of 2-10 bar for operation. Ensure your system can provide this pilot pressure.

2. Electrical Connection:​ The solenoid coil is not included​ and must be ordered separately (F-type coil). Ensure you select the correct voltage coil for your application.

3. Port Configuration:​ All ports are G1/4 male thread. Confirm the thread type (G1/4, R1/4, or NPT1/4) for your system. Use appropriate thread sealant if required.

4. Operating Pressure:​ Do not exceed 8 bar maximum operating pressure. The minimum operating pressure is 0 bar for main ports, but 2 bar is required for pilot air.

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 on manifold rail or with through-hole mounting. Ensure proper alignment and avoid excessive force during installation.

8. Temperature Range:​ Do not operate outside -10°C to +60°C media temperature or -5°C to +40°C ambient temperature.

9. Flow Capacity:​ The 1000 l/min flow rate is suitable for most 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. Pilot Connection:​ Connect the external pilot air supply to the designated M5 pilot port. Ensure the pilot pressure is within 2-10 bar range.

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 MFH 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.