What is a butterfly valve?

A butterfly valve is a shut-off valve with a relatively simple construction. In closed position, the disc blocks the valve bore while in open position, the disc is turned to allow flow. A quarter turn takes the valve from fully open to fully closed position, or opposite, and thus the butterfly valve allows for quick opening and closure.

Where are butterfly valves used?

Butterfly valves can be used for a broad range of applications within water supply, wastewater treatment, fire protection and gas supply, in the chemical and oil industries, in fuel handling systems, power generation etc. Some of the advantages for this type of valve are the simple construction not taking up too much space, and the light weight and lower cost compared to other valve designs.

The valves can be operated by handles, gears or actuators according to any specific need.

Read more about typical applications for the different types of butterfly valves.

Main design of butterfly valves

The butterfly valve can be centric or eccentric. On a centric (concentric) butterfly valve the stem is centered in the middle of the disc and the disc centered in the bore. The eccentric butterfly valve has one or more stems (stub shafts) located offset from the center according to the categories of double offset butterfly valves and triple offset butterfly valves.

Product insights

Extensive range of butterfly valves

AVK has been in the valve business for almost 50 years. Today, we offer one of the widest ranges of butterfly valves at the market reflecting our customers’ needs. And of course, we offer a wide variety of material configurations for each of these types as well as any type of actuation . This means that we most probably can supply the right valve for your application.