Butterfly valve internal structure detailed, let you fully understand the butterfly valve function

First, the role of butterfly valve

Butterfly valve is a commonly used flow control valve, through the rotation of the valve to adjust the flow of the fluid medium. It is usually used to control the flow of liquids or gases, and is widely used in chemical, petroleum, water conservancy, electric power and other fields.

Second, the internal structure of butterfly valve

Butterfly valve is mainly composed of valve body, seat, stem, butterfly disc and other parts.

1. Valve body

The valve body is the main pressure part of the butterfly valve, usually made of cast iron, ductile iron, stainless steel and other materials. Its interior is precision-machined to ensure unimpeded flow of liquid or gas.

2. Valve seat

The valve seat is a rubber or PTFE seal that is fixed inside the valve body to prevent liquid or gas leakage. Usually, the valve seat is replaceable and can be selected in different materials according to different use cases.

3. Valve stem

The valve stem is a component that connects the disc to the handle or actuator and is mainly used to control the opening and closing of the disc. Its material needs to have a certain pressure and wear resistance.

4. Butterfly disc

The butterfly disc is one of the key components of the butterfly valve and is usually made of metal or plastic. When the valve is opened, the disc rotates automatically, changing the flow rate in the pipe. The tightness of the disc is dependent on the seat and can usually be adjusted or replaced to achieve greater tightness.

Answers to frequently asked Questions

1. What scenarios can butterfly valves be used in?

Butterfly valves are usually used to control the flow of liquids or gases, and are used in chemical, petroleum, water conservancy, power and other fields. Specific scenarios include the transportation of corrosive media, high temperature and high pressure media, food and medicine.

2. What are the advantages of butterfly valves?

Butterfly valve has the advantages of simple structure, light weight and easy installation. In addition, the butterfly plate as a seal can achieve zero leakage, thus more safe and reliable.