WEH^® Screw-in Valves

Reliable backflow prevention with minimal space requirements

Compact. Soft-sealing. Powerful.

When media must flow in only one direction, WEH^® Screw-in Valves are the ideal solution. These valves allow free flow in the screwing-in direction and reliably block flow in the opposite direction – compact, tight, and durable. Thanks to their space-saving design, they are perfect for tight installation spaces while offering high flow capacity with low noise levels.

The Screw-in Valves were specially developed for pneumatic and hydraulic applications in machine and plant engineering, conveyor technology, as well as in the chemical, pharmaceutical, and medical technology industries. The soft-sealing O-ring sealing cone ensures a secure seal – even at high temperatures and pressure spikes up to 250 bar.

Soft-sealing → high leak tightness, low leakage
Compact and space-saving
Flow in screwing direction
Use at high temperatures and pressure peaks up to 250 bar
For pneumatic and hydraulic applications
High flow rate
Easy installation

Your Benefits

High tightness with minimal leakage

Soft-sealing O-ring cone for reliable sealing even with demanding media.

Compact design

Space-saving design – ideal for tight installation spaces or modular system concepts.

Easy installation

Quick and secure assembly using an internal hex key in threaded holes – for cost-effective processes.

Robust & durable made of stainless steel

Low wear, corrosion-resistant, and suitable for temperatures up to 200 °C.

Low noise & high performance

Minimal opening pressure and high flow rate.

Product Details

Connection sizes of screw-in valves

The screw-in valves are available in different connection sizes:

G1/8″, G1/4″, G3/8″ Male thread
M10x1.0, M14x1.5, M18x1.5 Male thread

To the Products

High flow rate in the direction of screw rotation

The screw-in valves are mechanical shut-off valves which allow the media to flow freely and at a high flow rate in the direction of screw rotation from a cracking pressure of 0.5 bar, and simultaneously shut off the flow of the media in the other direction.

Flow curves of our screw-in-valves

Standard product or custom solution?

We also develop custom screw-in valves for specific requirements – tailored to the medium, pressure, temperature, and installation conditions.

Customized Valves

Typical application

Controlling the backflow of media

Check and screw-in valves from WEH^® prevent unwanted backflow of media in sensitive process chains. The reliable one-way function ensures pressure conditions, protects components, and ensures stable processes.

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Find the right solution faster!

Our products are as individual as your application. To provide you with fast and tailored support, please download the document, fill it out, and send it back to us. Our product experts will then get in touch with you promptly.

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