Butterfly valves are a type of quarter-turn valve that can be utilized as an on-off or throttle valving solution. Mainly there are two types of butterfly valves which are - concentric butterfly valves and eccentric butterfly valves.

At Dutco Tennant LLC, we supply high-end concentric type butterfly valves and other range of valving solutions ideal for potable water, water treatment and many other applications. We are exhibiting in this year’s WETEX 2022 starting from 27th September 2022 to 29th September 2022.

Make sure to visit us at the exhibit. But before you arrive, here are some of the different types of butterfly valves that you should know about. Keep reading till the end to find out.

Concentric Type Butterfly Valve

This is the standard or general use butterfly valve. In this type of butterfly valve, the shaft is situated in the center of the disc. While opening or closing, there are a few parts of the disc that are always rubbing the seat or in-contact.

This behavior influences the seating experience to be encountering friction each time the valve is operating. In a standard application, the concentric type butterfly valve is restricted to class 150 due to the design of its seating.

Eccentric Type Butterfly Valve

The eccentric type butterfly valve has three categories and they are -  single-offset, double-offset and triple-offset. The availability of single-offset valves is rare in the marketplace whereas double-offset and triple-offset are the commonly used ones.

Oftentimes, these two sub-type of eccentric butterfly valves are also referred to as high-performance butterfly valves. The double-offset valve comprises two offset. The first one is located slightly behind the disc and it helps in making the valve have a consistent sealing surface on the disc.

Whereas the second offset is situated on the slightly right side of the disc’s center. This offset works to prevent the valve from coming in contact with the seat when it is completely open. This arrangement of the seating design helps in less friction and contributes towards prolonged service.

The triple-offset valve on the other hand has three offset and the first two offset does the same job as double-offset one. Only the third and additional offset of this valve has a conical shaped seating which is made to match with the disc that is also fabricated to match with the seating.

 This seating arrangement helps in preventing friction or rubbing completely while it's opening or closing. It also enables the valve to have a bubble-tight performance in the high-pressure application and have a much longer lifespan in comparison to double-offset butterfly valves.

So, what are you waiting for? If you are willing to learn more about concentric type butterfly valves or valving solutions in general then make sure to visit the Dutco Tennant LLC exhibit in WETEX 2022 beginning from 27th September ‘22 to 29th September ‘22. The exhibition is open for all and free to visit.