Festo Air Solenoid Valve MHE4-MS1H-3/2G-1/4 525187

The Festo MHE4-MS1H-3/2G-1/4 (Part No. 525187) is a high-performance, compact 3/2-way air solenoid valve from the MHE4 series, designed for fast-switching applications in industrial pneumatic systems.¹

Key Specifications and Function

Feature	Specification
Valve Function	3/2-way, closed, monostable (Normally Closed – NC)
Actuation	Electrical (Solenoid)
Reset Method	Mechanical spring
Nominal Flow Rate	$400 \text{ l/min}$ (Standard)
Pneumatic Port Size	G1/4 (all ports: 1, 2, and 3)
Operating Pressure	$-0.9 \text{ bar}$ to $8 \text{ bar}$ (Suitable for vacuum operation)
Operating Voltage	$24 \text{ V DC}$
Switching Speed	Fast Switching Time: $\sim 3.5 \text{ ms}$ (On/Off)
Design	Pressure-relieved poppet valve, Directly actuated
Protection Class	IP65 (Dust-tight and protected against water jets)
Construction Width	$18 \text{ mm}$ (Compact size)
Additional Features	Exhaust air function is throttleable (with flow control option), non-detenting manual override, built-in protective circuit (spark suppression, holding current reduction).

Features and Applications

The MHE4-MS1H-3/2G-1/4 is recognized for its high speed and robust construction, making it an excellent choice for dynamic pneumatic tasks:²

Fast Response: The quick $3.5 \text{ ms}$ switching time is crucial for applications that demand short cycle times and high repetition accuracy, such as sorting, filling, and dispensing.
Versatile Pressure Range: It can handle both positive pressure (up to ³ $8 \text{ bar}$ ) and vacuum (down to ⁴ $-0.9 \text{ bar}$ ), allowing it to control vacuum cups in pick-and-place applications.⁵
Compact Integration: Its narrow ⁶ $18 \text{ mm}$ width is ideal for integration into confined control cabinets or mounting on small, dedicated valve manifolds.⁷
Industrial Applications: It is commonly used in:
- Air Ejectors (for high-speed part sorting)
- Packaging Machinery
- Clamping and Gripping Systems
- Dispensing and Gluing processes
- General automation where a single-acting pneumatic actuator needs fast control.