Industrial butterfly valves regulate the flow in closed pipe systems. Similar to a gate, a disc inside the valve opens and closes to stop the flow. Their main task is to create one of two states, ‘open’ or ‘closed’, but not to throttle the media. Alternative shut-off valves are designed for this purpose. Our needle valves also allow for very precise control.

Our stainless steel or ductile iron butterfly valves are compact, durable and designed for use in a variety of industries. They are also usually more affordable than comparable gate valves in similar segments. More importantly, however, a butterfly valve that complies with DIN standards performs its task to the utmost satisfaction. The valve blocks the flow reliably and, above all, quickly. The automatic version is particularly impressive.

That depends on the desired effect. As the name suggests, non-return valves are primarily designed to prevent backflow of media. They operate passively and close automatically when the flow is appropriate. An electric or pneumatic butterfly valve with a drive can also operate automatically, but still switches actively. Depending on the design of your pipes, it may even be worthwhile to use a combination of both valves.

This is generally difficult to answer and depends on the local conditions. As a rule of thumb, you can use the size as a guide: above a certain nominal diameter, we clearly recommend butterfly valves for pipelines. A ball valve, on the other hand, can be ideal for smaller systems. Both types are suitable for flow control and reliably ensure interruptions without leakage. Simply get in touch with us. We will help you find the right product.

If you want to buy a butterfly valve, guidelines in Germany stipulate a certain performance. From a mechanical point of view, valves today function very similarly. At the centre is a disc that blocks the flow. This is achieved by rotating it transversely to the direction of flow. In a centric design, the pivot point for this is located in the centre. Double eccentric solutions shift this point further along the axis of the pipe and are not aligned with the centre.

Yes. According to the Drinking Water Ordinance (TrinkwV), all products that come into contact with drinking water must comply with generally accepted technical standards. DVGW certification is proof of this. Without it, you not only risk public health, but also recourse claims.

DVGW certification is mandatory for gas and drinking water pipes. It ensures that the fitting complies with regulations in terms of both technology and hygiene.

For many industrial applications, yes – but not permitted for gas and drinking water. Certification is mandatory in these cases.

EPDM is the standard here. It has been tested, is hygienically safe and durable.

These terms often describe similar concepts. The key factor is that in high-quality valves, both the valve disc and the seat ring, and in some cases the interior of the housing, are protected by a thick layer of PTFE. This ensures that all parts that come into contact with the medium are protected against corrosion.

The continuous operating temperature range of our PTFE butterfly valves is typically between -25°C and +200°C. Some models can also tolerate higher temperatures for short periods.

Yes, absolutely. PTFE is FDA-compliant and therefore meets the strict requirements for use in the food and pharmaceutical industries. This guarantees the safety of your manufactured goods.

Of course! Our experienced support team will be happy to advise you individually on housing material, seal type and drive. Simply contact us by telephone or email to find the perfect solution for your application.

Yes, of course. We test our valves for leak-proofness and functional reliability. The respective test pressures can be found in the technical data sheets.

For distributing, mixing or diverting media flows in pipe systems.

The L-bore switches between two paths (A → B or A → C). The T-bore can mix, split or control both inlet and outlet.

Yes, many manual models can be retrofitted with pneumatic or electric drives. Ask us – we will help you choose.

Pneumatic ball valves require regular maintenance, including inspection and cleaning of the actuator, seals and valve components to ensure optimum performance and longevity.

A pneumatic ball valve made of stainless steel offers high corrosion resistance and durability and is ideal for applications in aggressive environments and at high temperatures and pressures. A pneumatic ball valve made of brass can be used in drinking water applications.

A pneumatic ball valve is a ball valve that is operated by a pneumatic actuator. The actuator uses compressed air to rotate the valve body, which controls the flow of liquids or gases. We offer accessories such as solenoid valves, limit switch boxes and adapters with pneumatic ball valves. You can contact us to find out which accessories are required for the ball valves. We will put together the accessories on your request.

Yes, there are pneumatic ball valves that are specially designed for use in drinking water applications. These are made from materials that meet the strict requirements for drinking water.

A flanged ball valve with pneumatic actuator is a ball valve with flanged connections that is operated by a pneumatic actuator. It is used in industries that require reliable and tight connections at high pressures and temperatures.A flanged ball valve with pneumatic actuator is a ball valve with flanged connections that is operated by a pneumatic actuator. It is used in industries that require reliable and tight connections at high pressures and temperatures.

A pneumatic ball valve made of brass offers good corrosion resistance and is more cost-effective than stainless steel. It is often used in less aggressive environments such as drinking water, heating systems and at lower pressures.

A pneumatic 3-way ball valve allows the flow to be controlled in three different directions. It is used in applications that require the diversion, mixing or distribution of fluids.

Single-acting pneumatic ball valves have a pneumatic actuator that controls valve operation in one direction only (opening or closing), while a spring provides the reset. Double-acting pneumatic ball valves control operation pneumatically in both directions (opening and closing).

The pressure and temperature ranges of pneumatic ball valves vary depending on the material and design of the valve. Stainless steel valves are often suitable for higher pressures and temperatures, while brass valves are designed for medium ranges.

A double plate check valve is a check valve with two semi-circular flaps that open to allow flow and close to prevent backflow. It offers low pressure loss and a fast closing response.

FPM (fluororubber, also known as Viton) is a favoured sealing material for demanding applications in non-return valves due to its high resistance to aggressive chemicals, high temperatures and various oils and fuels. It is frequently used in chemical and petrochemical plants, in the food and beverage industry and in the pharmaceutical industry.

A non-return valve is a valve that allows liquids or gases to flow in one direction and prevents them from flowing back in the opposite direction. It is often used in pipework systems to prevent backflow and possible contamination.

These valves are often used in water and sewage systems, heating, ventilation and air conditioning (HVAC) systems, and in industrial processes where it is important to prevent the backflow of media.

Yes, check valve or non-return valves can be used in both liquid and gas systems. However, it is important to ensure that the valve is suitable for the specific requirements of the gas system.

NBR (nitrile butadiene rubber) is often used as a sealing material in non-return valves due to its resistance to oils, greases and various chemicals. It is ideal for applications in industrial plants, oil and gas pipelines and hydraulic systems.

The two plate open in the direction of flow due to the pressure of the flowing medium. In the event of backflow or pressure drop, they collapse and close the passage to prevent backflow.

EPDM (ethylene propylene diene rubber) is a popular sealing material for non-return valves due to its excellent resistance to UV radiation, ozone and various chemicals. It is particularly suitable for applications in the field of water supply, heating and cooling systems as well as for sanitary installations.

Choosing the right sealing material for your swing check valve depends on several factors, including the type of liquid or gas, temperature and pressure conditions, chemical resistance and environmental factors such as UV radiation and ozone exposure. A specialist or the manufacturer can help you select the appropriate sealing material based on your specific requirements.

Choosing the right sealing material for your swing check valve depends on several factors, including the type of liquid or gas, temperature and pressure conditions, chemical resistance and environmental factors such as UV radiation and ozone exposure. A specialist or the manufacturer can help you select the appropriate sealing material based on your specific requirements.

Non-return valves are manufactured from various materials, including stainless steel, galvanised steel, brass and plastic. The choice of material depends on the application and the requirements for corrosion resistance and durability.

A disc check valve is a non-return valve designed for installation between two flanges (wafer type). A spring-loaded disc inside the valve opens only in the flow direction and closes immediately when the flow decreases or threatens to reverse, thereby preventing backflow.

Both the RV108 and RV110 are high-quality disc check valves. A key distinguishing feature of the RV110 is its four grounding lugs, which provide an additional safety function. The RV110 can also typically be configured for a wider range of pressure ratings.

Spring-loaded means the valve disc is actively held closed by a spring. This enables very fast and secure sealing, independent of the installation position, and ensures reliable operation even at very low differential pressures.

These valves are particularly well-suited for clean liquids and gases. For media containing solids or with a high tendency for fouling, other designs, such as swing check valves, can sometimes be the better choice.

A knife gate valve is a shut-off valve that controls the flow in pipework by raising or lowering a plate. It is particularly suitable for viscous, abrasive and fibrous media.

Fergo offers knife gate valves made of stainless steel and grey cast iron with various seals such as NBR, EPDM and PTFE, depending on the application and medium.

They are operated manually using handwheels or automatically using pneumatic and electric actuators, suitable for various industrial control systems.

They are used in the chemical industry, food processing, waste water technology, the paper industry and other sectors with demanding media.

A pneumatically operated knife gate valve uses compressed air to move the valve - ideal for fast, automated processes. The electric knife gate valve, on the other hand, is controlled by a motor drive and is suitable for precise control. Fergo offers both variants in different sizes and designs to suit your needs.

Fergo configures knife gate valves with NBR, EPDM or metallic seals - also with highly resistant combinations such as PTFE-synt./EPDM/PTFE-synt. The selection depends on the medium and the operating conditions.

Yes, Fergo customises every knife gate valve on request - from the drive to the seal to the anti-corrosion coating. Simply send us your requirements by e-mail or via our enquiry form.

Strainer screens reliably protect your systems from contamination without impairing flow. This significantly reduces downtime or interruptions in your operations. Thanks to a wide variety of designs, they can be optimally adapted to the pipeline and medium. At Fergo, you can even get custom-made strainer screens that are manufactured exactly to your specifications. Despite their high performance, they remain as compact as possible – especially for smaller nominal diameters with sleeves. The screen can be replaced and cleaned in just a few simple steps, making maintenance particularly efficient. Manufactured from robust, high-quality materials, the fittings impress with their long service life. Compared to alternative filter systems, dirt traps are also extremely cost-efficient and, in most cases, just as effective.

Depending on the connection, there are various things you need to bear in mind when installing. If you are unsure, it is best to hire a professional. This is because industrial dirt traps can only do their job reliably if they are installed as intended by the manufacturer. If in doubt, please check with our support team before ordering to clarify all the details. Additional protective measures must be taken for aggressive media or those associated with high pressures and temperatures. Please always err on the side of caution. In principle, however, flange strainers are attached to the flanges of the pipes, while the socket version fits into the internal thread. With the latter, you should therefore ensure that the thread is screwed in cleanly and do not forget the seal. It is often necessary to hold the pipe in place until the fitting is secure. A connection via the flanges, on the other hand, requires that you first align them flush and tension-free. Then tighten the screws, as always, gradually and crosswise. After initial commissioning, ideally check again and retighten if necessary. Finished. If you need a valve to shut off the pipes in advance so that no medium can escape, take a look at our extended range.

Firstly, you must ensure that the strainer is facing downwards and, secondly, that it is installed in the correct direction. This is the only way to ensure that a Y strainer can function optimally in a heating system, steam system, drinking water system or other applications. The direction in which the medium should flow can be easily identified by the arrow prominently placed on the outside of the housing. Apart from horizontal alignment on the pipe, some products can also be installed vertically in the system. However, this is usually only possible in cases where the flow is downwards. So before you buy your strainer, check the enclosed data sheet. Here you will find all the technical details. Fergo provides practical 3D models for download so that you are well prepared.

That depends entirely on the desired application. The mesh size of the screen ultimately determines how precisely the filtration is carried out. This applies to your stainless steel strainer as well as to other materials. In other words, which particles of what size are reliably captured while minimising the impact on the flow of the medium. We therefore offer you a wide range to choose from, so you are sure to find something suitable. Our range extends from mesh sizes of 0.25 mm to 3.1 mm. This allows you to tailor the degree of filtration precisely to the respective process situation. If you still need to define your applications, please contact us. We will be happy to help.

While a gate valve is primarily designed for the ‘fully open’ or ‘fully closed’ function, a globe valve (also known as a poppet valve) is ideal for precise flow control. The design with an axially moving disc allows for sensitive throttling of the medium.

A bellows valve is always the first choice when leaks at the spindle must be absolutely ruled out. This is the case with media that are hazardous to health, harmful to the environment, valuable or highly pure. The bellows protects the spindle from the medium and the environment from the medium.

Yes, absolutely. Specially designed shut-off valves for steam are designed for high temperatures and pressures. Look for materials such as 1.0619 steel and sealing components that are approved for steam applications. We will be happy to advise you on this.

TA Luft (Technical Instructions on Air Quality Control) is a German regulation that sets strict limits for emissions from industrial plants. A valve that is ‘TA Luft-compliant’ has a gland packing (usually made of graphite) that complies with these strict emission limits.

Yes, at Fergo we specialise in customised solutions. If you require a specific nominal diameter, an exotic material or special certification, please contact us. We will be happy to develop a customised solution for you.