Wafer Butterfly Valve — compact, light, cost-effective
The wafer butterfly valve is clamped directly between two pipe flanges – with no flanges of its own. This compact, lightweight body form saves space and material, making it our most cost-effective butterfly valve. Quality stays high: a GGG40 body with epoxy coating, a stainless steel disc (1.4408) and a resilient seat ensure reliable shut-off up to PN16 across −10 °C to +120 °C. Ideal for water, air, HVAC and general plant engineering. Filter by DN and order from stock.
Lug Butterfly Valve — flexible end-of-line shut-off
The lug butterfly valve has threaded eyes and is bolted directly to the pipe flanges on both sides. This allows use as an end-of-line valve and lets you service one side of the line without removing the valve. Lug-type valves offer the same robust build – GGG40 body with 150 µm epoxy, stainless disc, EPDM or NBR seat, PN10/16 – and stay clearly below comparable branded valves on price. Preferred applications: wastewater, building services and utility lines. Choose the right lug valve for flexible installation.
Stainless Steel Butterfly Valve — for corrosive and demanding media
Where ductile iron reaches its limits, we supply the stainless steel butterfly valve with a full stainless steel (CF8M / 1.4408) body. This corrosion-resistant body form suits aggressive and demanding media in chemical processing, water treatment and the food and beverage industry. Available in wafer and lug versions from DN25 to DN300, PN10/16, with a stainless disc and EPDM, NBR or FKM seat – also for manual, pneumatic or electric operation. Here too you get tested stainless steel quality at a clearly lower price than comparable branded valves. Read our butterfly valve selection guide and order from stock.
Pneumatic & electric butterfly valves for automation
For automated processes we supply the butterfly valve in pneumatic or electric versions. Thanks to a factory ISO 5211 top flange, you can directly mount pneumatic actuators and the J4C electric actuator – single- or double-acting, 24V to 230V AC/DC. This gives you reliable flow control in water treatment, chemical and process plants. The complete automated set – valve, actuator and accessories – comes from a single source at a competitive price. Request an automated set.
The right seat for your medium — EPDM, NBR, FKM/Viton
The right seat determines service life and tightness. Choose EPDM for water, air and neutral media, NBR for oils and greases, FKM/Viton for more aggressive or hotter media. When in doubt, check media compatibility with our resistance tool. For higher pressures, higher temperatures or a low-wear metal seat, ask our team about a double-eccentric butterfly valve. That way you find the most economical valve for every medium.
Why Fergo butterfly valves? Quality, price, availability
Our butterfly valves are Fergo own-brand products: built to tested industrial quality per EN 593, with tightness to Leakage Rate A under EN 12266-1. You get the technical performance of branded valves – GGG40 or stainless body, 1.4408 disc, resilient seat – at a clearly lower price. Add high stock availability, fast delivery and technical support for selection and automation. See our valve certifications for the approvals available by model. Branded quality, fair price, from stock.
Certificates
Special solutions
Resistance check
FAQ – Your Questions, Our Answers!
The FERGO butterfly valve range covers a very wide spectrum of nominal sizes and pressure ratings:
Nominal sizes – DN25 to DN1200 (depending on the design; concentric valves up to DN1200, double‑eccentric and DVGW valves up to DN300)
Pressure ratings – PN6, PN10 and PN16 for standard industrial applications; higher pressure ratings (PN25, PN40) for double‑eccentric versions
ANSI/ASME – Class 150 for inch‑standardised piping systems, particularly in the international and American markets
Face‑to‑face length – Wafer type according to ISO 5752 short series; Lug type for dead‑end service
All butterfly valves are available from stock. Use the product configurator to filter specifically by nominal size, pressure rating, seat ring material and body material.
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.
The difference lies in how it is fitted to the pipework. A wafer-type butterfly valve is clamped directly between two mating flanges on the pipework without its own flanges and held in place by through bolts – it is compact, lightweight and cost-effective. A flanged butterfly valve (lug design) has its own integral threaded holes at the ends and can be bolted to a flange on one side using stud bolts, allowing for a detachable connection on each side. The lug design is therefore particularly suitable for dead-end service – i.e. wherever one side of the pipeline needs to be isolated from pressure without dismantling the opposite side. Both designs are available from stock at FERGO as part of the Fergo butterfly valve range.
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.
The material of the seat ring determines the media resistance and temperature limits of the butterfly valve:
EPDM – For water, hot water, steam, diluted acids and alkalis, as well as media used in water treatment and the food industry. Not suitable for oils. Up to approx. 120 °C.
NBR (nitrile) – For mineral oils, fuels, greases and oil-containing media. Not suitable for hot water or steam. Up to approx. 80 °C.
PTFE – Virtually universal chemical resistance to aggressive acids, alkalis and solvents. The first choice in the chemical and pharmaceutical industries – available as a PTFE butterfly valve.
FKM / Viton® – High resistance to aggressive chemicals, solvents and elevated temperatures up to approx. 180 °C. Ideal for demanding process media.
If you are unsure about media compatibility, the FERGO team will be happy to provide individual advice.
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.
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.
The choice between electric and pneumatic actuation depends on the available energy sources, switching times, and the area of application.
Electric butterfly valves – Ideal for plants without a compressed air supply. Available with 24 V DC/AC, 230 V and 240 V as well as analogue control signals 0–10 V and 4–20 mA for continuous control. Easy integration into PLC, building automation and SCADA systems. Slow to medium switching times (typically 15–60 seconds).
Pneumatic butterfly valves – For plants with an existing compressed air supply. Single-acting (spring-close or spring-open) for safe closing in the event of compressed air failure; double-acting for fast, precisely controlled switching movements. ATEX-compliant versions for hazardous areas. Very fast switching times (under 5 seconds) and robust in harsh industrial environments.
As a rule of thumb: electric for precise control tasks and plants without compressed air – pneumatic for fast switching, high cycle rates and ATEX areas.
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.
A double‑eccentric butterfly valve – also known as a high‑performance butterfly valve or double‑offset butterfly valve – differs from a concentric butterfly valve by two geometric offsets of the rotation axis. First, the shaft is offset behind the seat plane, and second, it is shifted laterally from the pipe centre. This causes the disc to immediately swing out of the seat when opening, rather than rubbing against it. The advantages over concentric valves are reduced seat wear, longer service life and the ability to use metal seats. This makes the double‑eccentric design particularly suitable for higher pressures (PN16 to PN40), elevated temperatures, frequent actuation cycles and media that would damage soft elastomer seats – for example steam, hot gases, abrasive media and aggressive chemicals.