News

New Case Study

The Basel wastewater treatment plant has been in operation since 1982 and is reaching its limits. More than 700 of our knife gate valves, butterfly valves and water control gates were used for an expansion of the plant.

Fail-safe function

Safety first: Thanks to an added air vessel, this Wey knife gate valve VN closes automatically in the event of a power or compressed air failure. Two of these valves will be shipped to the Netherlands soon and installed in a waste incineration plant.

Stable, precise and absolutely even

We put up to 10 hours of work into a single gate. After being shaped by flame cutting, our stainless steel gates are planed - for extra even surfaces. The CNC machine mills edges and holes. Finally, the entire gate is ground for a perfectly smooth surface.

Wastewater Heat Recovery

Wastewater as a source of energy is already a reality in many wastewater treatment plants. In Switzerland alone, wastewater provides enough energy to generate hot water for 900,000 inhabitants. We have been allowed to support the construction of some wastewater heat recovery plants with Wey valves, but the potential is far from exhausted.

VNC with Hastelloy alloy

Corrosion resistancy at its best: The body and gate of this pneumatic actuated knife gate valve VN have a Hastelloy C22 alloy. PTFE gliders make sure the two materials don’t damage each other. The topwork is made of stainless steel, just like the tubing and the solenoid valve. The whole knife gate valve is ATEX certified for zones 0/20 (inner area) and 1/21 (outer area).

For temperatures up to 400°C

These two knife gate valves MG DN 400 recently left our production site for a Brazilian plant working on water treatment and the disposal of industrial effluents.

Service abroad

Our service technician was recently called to a plant manufacturer in Portugal to fix some Wey valves MG that seemed to leak. A few retightened screws and a repacking of the valves quickly fixed the problem. The individual sections of the plant are assembled in Portugal and then shipped as a whole to their final destination in Greece.

Automated water supply system with Wey control gates

The responsible use and distribution of water is a real challenge. GWF has therefore developed an automated water supply system using Wey sluice gates. The valves are installed in irrigation canals for agriculture and can be controlled by App. The water flow is measured in order to make predictions about water consumption. The entire valve is powered by solar energy and is therefore completely self-sufficient. Systems like these are already in use in many regions around the world.

Melting valve 750 x 750 mm

A custom-made knife gate valve for a plant engineering company in Germany. Our Wey melting valve is specially designed for granulating plastics. It resists the viscous plastic melt that flows through the valve and can reach up to 270°C. Due to the viscosity of the medium, the sealing of the valve is designed differently than in any other Wey valve.

High pressure knife gate valve for mining

This high pressure knife gate valve HD DN 150 will soon help transporting mining water in Sweden. It withstands a pressure of up to 63 bar, is particularly corrosion resistant thanks to its stainless steel body and bonnet, and easy to clean thanks to its flushing connection.

Upgrade of our W series

After decades of experience in heavy duty applications, the optimized design is now even more robust.

A new way of Raclette

May we present our latest innovation: The Original Wey Knife Cheese Valve - designed exclusively for the IFAT in Munich. A perfect combination of Swiss tradition and world-class engineering.

New Case Study

The famous Jet d’Eau is an iconic landmark in the city of Geneva that has adorned Geneva’s harbor district for decades. As part of the renovation of the pumping system, several water control gates were replaced with Wey sluice gates.

Remote controllable

Operating a valve can’t get any easier than with these knife gate valves MF DN 125. They are equipped with limit switches and solenoid valves for remote control, wired in a junction box for easier handling. Along with five others, these valves are soon being installed in a waste-to-energy plant in Dubai.

Regulated flow on a large scale

A total of 12 knife gate valves MF with a nominal size of DN 1200 are currently being produced at our production site in Eschenbach. Two of them are equipped with V-notches for flow regulation. The additional wear plates can be replaced easily when worn out.

Wey Knife Gate Valve Assembly Tutorial

See step-by-step how each of our knife gate valves is assembled with care by our Swiss team.

For end-of-line and between-the-lines

Most of our valves can be installed between two pipes as well as at the end of the line. The knife gate valve in the photo was dead ended for several months before the plant was extended by additional pumps and pipes. Almost 50 Wey knife gate valves with nominal sizes from 24″ to 54″ are installed at this wastewater treatment plant in Texas.

Massive control gates for large masses of water

Our sluice gate type 2 is always used when especially large amounts of fluids must be shut off. The gate has a thickness of 12 mm and is additionally reinforced for a maximum head of water of 5.5 m. Two of these sluice gates will soon be installed in a wastewater treatment plant in Switzerland where they shut off the main inlet whenever necessary.

Gas approved and ATEX certified

Available in nominal sizes from DN 25 to DN 1600, in various materials and body types and with different actuators, we can configure our butterfly valves to meet any individual requirement. The six valves type TW20 on the photo just left our production site for a biogas plant in Italy.

Triple protection in demanding environments

Sometimes more is simply more. This Wey knife gate valve VSC DN 100 is protected against all types of harmful influences.

10.8 square meters of blocking surface

This Wey stop log has a width of 3.6m and a height of 3.0m. It will soon be installed at a wastewater treatment plant in Switzerland. During inspection work, it shuts off the emptied basins of the plant. Thanks to a special system with double lip seals, our stop logs provide even better tightness than the standard requires - in both flow directions.

Super duplex for extra resistance

Seawater is considered to be one of the most corrosive natural environments on earth. For an offshore application in Denmark we therefore designed a Wey knife gate valve MG DN 1200 whose body and gate are made of super duplex stainless steel. With a PREN value of >42 super duplex makes the valve perfectly resistant against corrosion in its future environment.

Because sometimes speed is crucial...

Shortly before Christmas, we received an emergency call from Räber AG. In an almost new plant for jam production, a knife gate valve (third-party product) had suddenly failed. Within a few hours, our team was able to react and by the next morning, the jam manufacturer received a custom-fit Wey knife gate valve VNC DN400 for his plant. A service like this is a question of attitude for us and a real team effort.

Did you know that our valves are available in DIN, ANSI, BS, and AS flange drillings? We also offer a wide range of nominal sizes, face to face dimensions and materials. Let us create the perfect configuration for your needs.

Safety-cylinder for chemical industry

Safety first! Unlike most of our valves, this knife gate valve MGC DN 300 is equipped with a single-acting cylinder. Whenever the compressed air in the production plant fails, the valve closes automatically to prevent further damage. The cylinder has a tandem design with two pistons and therefore a reduced diameter. The valve in the photo was recently produced for a german customer in the chemical industry. It is ATEX certified for zones 0/20 (inner area) and 1/21 (outer area).

Heavy duty valve in O-Port gate design

Unlike most Wey knife gate valves, our DP series is designed with a through gate. This allows the valve to cut through static medium columns. For the valves in the picture, we additionally used hardened steel to provide extra protection against corrosion and PTFE as a non-stick coating. The three through gate valves withstand temperatures of up to 200°C and a pressure of more than 20 bar. They will be installed at a plant producing fire protective boards in Belgium.

A total of 800 wastewater treatment plants and 50‘000 km of sewer lines ensure the high water quality of Switzerland‘s rivers and lakes. Wey valves can be found in more than 700 of these plants. We have been at home in wastewater treatment for almost 50 years and are therefore experienced with the specific challenges of water treatment applications.

Think big! Wey MFH DN 1600

This huge knife gate valve with a nominal size of DN 1600 and a hydraulic actuator was recently produced for our partner EIP Enviro Level Controls Pvt Ltd in India. It will be installed on the production site of one of India‘s largest steel manufacturers. Due to its ceramic sealing and Bricafeu 479 coating, it is heat-resistant up to 230°C.

Preventing imminent power outages with gas-fired power plants

The Federal Council is currently discussing how Switzerland can protect itself from a sudden blackout. The SRF reports about the different possibilities and the block-type thermal power plant in Mellingen. Like many other plants around the world, this power plant is equipped with Wey valves.

Faster than the explosion and hygienic for all requirements of the pharmaceutical and food industry

Our high speed isolation valve «SpeedWey» closes within 23 milliseconds in case of an explosion and protects the rest of the pipe system against destruction. The valve in the picture is additionally fitted with a PTFE inliner, which guarantees smooth surfaces with virtually no crossovers or gaps. It can therefore be used for the pharmaceutical and food industry and protect the facility and human life e.g. from flour dust explosions. The SpeedWey is manufactured at our production site in Switzerland and exclusively available at our partner IEP-HOERBIGER Technologies.

Energy from biomass

A new documentary of the NDR talks about the energy source biogas, visiting one of northern Germany's biggest biogas plants in Torgelow. The plant is fully equipped with Wey valves.

For high pressures up to 100 bar

In means of handling extremely high pressures and dealing with abrasive, thick and dry media, our knife gate valve HD is our front-runner. Our engineering team designed it with an automatic sealing effect: The higher the pressure, the better the seal. The valve shown in the photo has a nominal size of 350 mm and is leaving for a mine in Australia next week.

Every single one of our water control gates is custom-made in our production site in Eschenbach, Switzerland. Our team often visits the operating sites serveral times to make sure everything fits. Today Wey water control gates are found all over the country in water and wastewater treatment, power generation, and irrigation systems.

Smart actuators for high performance valves

For a special order from China, our valves were upgraded with electrohydraulic actuators.

Sistag mechanic - an adventurous job

Our valves get installed at extraordinary places all over the world. This means always new challenges for our assembly team.