Festo Pneumatic Valve - VHEF Series - G1/8

The Festo VHEF finger lever valve is a compact, manually actuated 5/2 monostable pneumatic valve w...

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Tameson UKFesto 5/2 Monostable Finger Lever Valve G1/8 750L/Min -0.95 - 10Bar/-14 - 145Psi - 4500005
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Product Information

Full details

The Festo VHEF-L-M52-E-G18 is a compact, manually actuated 5/2 monostable pneumatic valve designed for industrial automation. It offers precise control of pneumatic systems with a high flow rate of 750 l/min and a robust metal housing. A potential consideration is its monostable nature, meaning it returns to its default state when the lever is released, which may not suit all applications requiring sustained states without continuous actuation.

All features

Model Part NumberVHEF-L-M52-E-G18
BrandFesto

Extended Product Information

FAQs

What is a monostable valve?

A monostable valve is a type of pneumatic valve that returns to its default position (spring-biased) once the actuating force (in this case, the finger lever) is removed.

What is the nominal flow rate?

The nominal flow rate is 750 liters per minute (l/min), indicating the volume of air the valve can pass under standard conditions.

What type of pneumatic connections does this valve use?

This valve uses G1/8 threaded connections, which conform to the BSPP (British Standard Pipe Parallel) standard.

Can this valve be used with lubricated air?

Yes, the Festo VHEF series is designed to operate reliably with or without air line lubrication, as long as the air quality meets general industrial standards.

What is the operating temperature range?

The valve can operate within a temperature range of -10°C to +60°C.

How do I clean the valve?

Clean the exterior of the valve with a dry or slightly damp cloth. Avoid using harsh chemicals or solvents that could damage the housing or seals.

What is the maximum operating pressure?

The maximum operating pressure for this valve is 10 bar.

Troubleshooting

Valve does not actuate

Check air supply pressure and ensure it is within the operating range (0.95 to 10 bar). Verify that the control line is properly connected and free of leaks.

Leaking air from exhaust port when not actuated

Ensure the valve is receiving adequate supply pressure. Check for debris or damage to the piston slide seal. If problems persist, the valve may need replacement.

Slow or weak cylinder response

Verify the flow rate is sufficient for the connected actuator. Check for restrictions or leaks in the pneumatic lines or fittings. Ensure the valve's G1/8 ports are not obstructed.

Valve does not return to its default position

Confirm that the spring return mechanism is not obstructed. Check for internal damage or sticking of the piston slide. Ensure there is no back pressure on the exhaust port.

Pros and Cons

Pros

  • Intuitive manual control with an ergonomic lever.
  • High flow rate (750 l/min) for efficient operation.
  • Durable metal housing and piston slide for longevity.
  • Compact 20mm width saves space in control cabinets.
  • Wide operating pressure range (-0.95 to 10 bar).

Cons

  • Monostable design requires continuous actuation to maintain a state.
  • G1/8 connections may require adapters for non-standard fittings.
  • Manual actuation limits use in fully automated sequences without external input.

Setup, Compatibility & Care

Setup:

  1. Ensure the pneumatic system is de-energized and depressurized before installation.
  2. Connect pneumatic lines to the G1/8 ports using appropriate fittings. Ensure a secure seal.
  3. Mount the valve in the desired location, ensuring it is securely fastened.
  4. Connect the valve to the compressed air supply and the actuator lines.

Compatibility:

  • Pneumatic Connections: Compatible with standard G1/8 BSPP threaded fittings.
  • Air Supply: Suitable for use with filtered, lubricated or unlubricated compressed air within the specified pressure range.
  • Operating Temperature: Operates effectively between -10°C and +60°C.

Care:

  • Regularly inspect the valve for signs of wear or damage.
  • Ensure pneumatic lines are clean to prevent debris from entering the valve.
  • If using lubricated air, maintain the appropriate oil mist concentration.
  • Clean the exterior with a dry or slightly damp cloth. Avoid using solvents.

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