Festo Stem Actuated Valve - VMEF-STCZ-M32-M-G18

The Festo VMEF stem actuated valve is a compact 3/2 monostable pneumatic valve designed with a clo...

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Tameson UKFesto 3/2 Nc Monostable Stem Actuated Valve G1/8 750L/Min -0.95 - 10Bar/-14 - 145Psi - 8031335
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Product Information

Full details

The Festo VMEF-STCZ-M32-M-G18 is a compact 3/2 monostable pneumatic valve designed for industrial automation engineers and maintenance technicians who require reliable, precise mechanical actuation. Its key benefit lies in its robust piston slide technology and high flow capacity of 750 l/min within a space-saving 20 mm footprint; however, users should note that as a stem-actuated valve, it requires consistent mechanical engagement to maintain its open state.

All features

Model Part NumberVMEF-STCZ-M32-M-G18
BrandFesto

Extended Product Information

FAQs

What is the function of the 3/2 monostable design?

It means the valve has three ports and two positions, returning automatically to the closed default position when the actuator is released.

Can this valve be used in vacuum applications?

Yes, the operating range begins at -0.95 bar, allowing for vacuum functionality.

What is the physical width of the valve?

The valve housing has a compact width of 20 mm.

What type of pneumatic connection does it use?

It utilizes a standard G1/8 pneumatic connection port.

What is the maximum flow rate?

The valve supports a standard nominal flow rate of 750 l/min.

Can it operate in outdoor temperatures?

It is rated for temperatures between -10°C and +60°C, making it suitable for many outdoor industrial environments.

Troubleshooting

Valve fails to return to closed position

Check for mechanical obstruction or debris around the stem; verify the return spring is not damaged.

Air leakage during operation

Inspect G1/8 connections for tightness; if leaking from the ports, verify the system pressure is within the -0.95 to 10 bar rating.

High force required to actuate

Ensure the actuator stem is not experiencing side-loading and is being pushed perpendicularly to the valve body.

Pros and Cons

Pros

  • Compact 20 mm width ideal for high-density installations
  • High flow rate of 750 l/min for efficient performance
  • Wide operating pressure range of -0.95 to 10 bar
  • Durable piston slide technology for long service life
  • Wide operating temperature tolerance (-10°C to +60°C)

Cons

  • Requires physical mechanical input for actuation
  • Monostable nature means it does not 'latch' automatically
  • G1/8 connection may require adapters for specific piping systems

Setup, Compatibility & Care

Installation requires standard G1/8 pneumatic fittings. Ensure all lines are clear of debris before connecting to prevent damage to the internal piston slide. When mounting, ensure the actuator stem is aligned correctly to prevent side-loading, which can cause premature seal wear. For care, keep the valve free of excessive dust and moisture. If the valve is used in a high-cycle environment, periodic inspection of the stem movement and return spring tension is recommended. No lubrication is typically required if clean, filtered air is supplied to the system.

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