PTFE butterfly valves for demanding industrial applications - chemical-resistant and durable

Are you looking for a butterfly valve that has no problems with aggressive chemicals, strong acids or alkalis? With conventional materials, you often quickly reach the limits of what is feasible. Everything then centres around corrosion, leaks and constant replacement - which costs time and money.

What would happen if these permanent construction sites simply disappeared?

PTFE butterfly valves (polytetrafluoroethylene) were made precisely for such tough applications. This special fluoropolymer is practically unaffected by chemical attack and forms...

What would happen if these permanent construction sites simply disappeared?

PTFE butterfly valves (polytetrafluoroethylene) were made precisely for such tough applications. This special fluoropolymer is practically unaffected by chemical attack and forms a completely tight barrier. Fergo offers variants with pneumatic, electric or manual actuation. The PTFE-coated flaps protect your system for years and make operation safer.

Buy PTFE butterfly valve online at Fergo Shop – wide selection for chemical, industrial, and pipeline applications

What makes a proper PTFE butterfly valve?

Unlike simple valve seals, a complete PTFE layer - at least 3 mm thick - ensures that the components that come into contact with the medium are reliably covered or encased. The advantage?

Complete protection: Not only the seat ring, but also the disc and the inner walls of the housing are protected against corrosion and abrasion.
Smooth and insensitive: the PTFE surface allows almost nothing to stick. Hardly any risk of blockages, the flow remains stable.

Temperatures? No stress: PTFE can easily withstand temperatures between -25°C and +200°C.

When is there no getting around the PTFE butterfly valve?

Not every medium justifies this effort - water, air or harmless gases often get by with EPDM or NBR seals without any problems. But if you answer "yes" to the following questions, you should take a closer look:

Are highly aggressive chemicals or strong alkalis/acids to be conveyed?

Do you process solvents or abrasive media?

Does the pharmaceutical or food industry require particularly clean or cleaning-intensive processes?

Must product contamination be excluded at all costs?

How do you choose the right PTFE butterfly valve?

The best PTFE butterfly valve depends directly on your situation. You should pay particular attention to these points:

Nominal diameter (DN): We offer butterfly valves from DN 50 to DN 300, i.e. virtually any pipe dimension.
Pressure range (PN): Our models can withstand pressures up to PN16. Many are also certified for ANSI 150 lbs.
Design: Intermediate flange version for close installation between two flanges, or flanged version (Lug) for mounting on a single flange.

Does the body of a PTFE butterfly valve have to be made of stainless steel?

The housing forms the foundation of every fitting and is a key factor in determining its durability and service life. At Fergo, we consistently use tried and tested materials of the highest quality. You receive PTFE butterfly valves in accordance with DIN and ANSI standards, delivered quickly to Germany, Austria or Switzerland. Together, we are sure to find the perfect solution for your application.

To answer the question directly: No, a PTFE butterfly valve does not necessarily have to have a stainless steel body. But it can - the application alone decides that. We offer the proven PTFE lining in various housings, including stainless steel 1.4408 for corrosive environments, spheroidal graphite cast iron GGG40/50 for robust applications and also special materials for specific requirements.

The advantages of a PTFE butterfly valve with a high-quality housing

Tested quality and chemical resistance

Fergo stands for German precision. Our PTFE butterfly valves comply with the latest DIN and ANSI standards and are certified for the most demanding applications. In the data sheets, you can see immediately whether the valve is approved for your media - whether aggressive acids, alkalis or high-purity substances. The PTFE lining guarantees almost universal chemical resistance.

Individual advice and customised solutions

Our service makes the difference. At Fergo, your satisfaction is our top priority. If you need a customised solution that is precisely tailored to your process plant, we will be happy to take on the challenge. Our team has been on the market for over 20 years and is at home in a wide range of industries from chemicals to pharmaceuticals.

Global delivery capability and rapid availability

Would you like to buy a PTFE butterfly valve in DN 50 or DN 300, but are not located in the DACH region? No problem. We deliver worldwide. Thanks to our large stocks, short delivery times are the rule - in many cases, your order will reach you on the next working day.

Longevity and sustainability

The high quality of our products not only means maximum operational reliability, but also an extremely long service life. This results in lower maintenance costs and protects the environment, as the fittings need to be replaced less frequently. We pursue this sustainable philosophy in all areas of the company.

FAQ - Your questions, our answers!

+ - What is a butterfly valve on a pipe?

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.

+ - What are the advantages of this type of 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.

+ - Should I buy a non-return valve or a shut-off valve?

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.

+ - When should a ball valve be used instead of a butterfly valve?

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.

+ - What is the difference between centric and eccentric?

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.