Introduction to Butterfly Valves and Their Applications

Basically, the function of a butterfly valve is to control the flow of a liquid or gas by a tube or pipe. Generally, which kind of materials include liquid, steam, gas, and air. except this, some types of dry materials can also be passed by these units. In this article, we are going to find out more about the different elements of butterfly valves and their applications. Read on to find out more.

The butterfly valve comprises a circular disc. The pivot axis of the disc is in the direction of the flowing material. The elements of the valve include an actuator, stem, dis, seat and body. Each of these elements is obtainable in different materials known as trim features. Based on the application, you want to go for the right form valve.


The body of the valve is made of different metals such as stainless steel, carbon steel, aluminum, ductile iron, cast iron, and exotic metals, just to name a few. You can find these units in lug and wafer style. The latter is installed between pipe flanges. The assistance of this kind of valve is that it is a lot easier to install and replace. But if you want to go for a substitute, you need to drain the conveying line.

The other kind has tapped holes in it that allow you to bolt them to a mating flange. The valve seals the material when the valve is closed.


Another shared kind of these units is called the resilient seated kind. The inside of the body of these units is lined up with a special elastomer seat. Typically, these seats are made of white neoprene, white buna, carbon, natural rubber, chlorbutyl, Teflon, viton, buna and EPDM, just to name a few. Your choice of the material is dependent on material, pressures, and temperatures.

Typically, the seats of some low-cost units are molded and can’t be removed or repaired. Generally, accuracyn units have removable seats that can be replaced or repaired.


The disc part regulates the material flow in the conveying line. except this, disc materials are chosen based on the application. shared materials include ductile, nickel-plated, epoxy coated, ductile iron, aluminum, and stainless steel.


The stem goes by the valve center, connects to the actuator and adjusts the disc for optimal material flow, and then closes off. Based on the size of the valve and application, stems can be constructed based on one or two pieces. Generally, the kind of materials used in the construction of stems includes stainless steel and carbon steel.


Actuators are of different types, such as electro-hydraulic, electric, pneumatic, gear, and manual manager.


Butterfly valves are designed for a lot of applications, such as liquid, steam, gas, and air. These units are used to manager materials that are displaced by the disc. You may want to be careful when using these units in an abrasive or semi-abrasive application.

In short, this was a description of butterfly valves and their applications in different environments and systems.

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