Product Introduction
Butterfly valves can be used for switch control of low-pressure pipeline media. Butterfly valves refer to a type of valve where the closing element (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media.
It mainly plays a role in cutting off and throttling on pipelines. The butterfly valve opening and closing component is a disc-shaped butterfly plate that rotates around its own axis inside the valve body to achieve the purpose of opening, closing, or adjusting.

Working principle
Butterfly valve is a type of valve that uses a disc type opening and closing element to rotate back and forth about 90 degrees to open, close, or regulate the flow rate of the medium. Butterfly valves not only have a simple structure, small size, light weight, low material consumption, small installation size, low driving torque, easy operation, and fast speed, but also have good flow regulation function and closing sealing characteristics. They are one of the rapidly developing valve varieties in the past decade.
Butterfly valves are widely used. The variety and quantity of its use are still expanding, and it is developing towards high temperature, high pressure, large diameter, high sealing, long service life, excellent regulating characteristics, and multi-functional one valve. Its reliability and other performance indicators have reached a high level.

structure
Mainly composed of valve body, valve stem, butterfly plate, and sealing ring. The valve body is cylindrical in shape, with a short axial length and a built-in butterfly plate.

characteristic
1. Butterfly valves have the characteristics of simple structure, small volume, light weight, low material consumption, small installation size, fast opening and closing, 90 ° reciprocating rotation, and small driving torque. They are used to cut off, connect, and regulate the medium in pipelines, and have good fluid control characteristics and closing sealing performance.
2. Butterfly valves can transport mud and accumulate less liquid at the pipeline outlet. Under low pressure, good sealing can be achieved. Good regulation performance.
3. The streamlined design of the butterfly plate reduces fluid resistance loss, making it an energy-saving product.
4. The valve stem is a through stem structure that has undergone quenching and tempering treatment, and has good comprehensive mechanical properties, corrosion resistance, and abrasion resistance. When the butterfly valve is opened and closed, the valve stem only rotates and does not move up or down. The packing of the valve stem is not easily damaged and the seal is reliable. Fixed with the butterfly plate cone pin, the extended end is designed to prevent the valve stem from bursting out in case of accidental breakage at the connection between the valve stem and the butterfly plate.
5. The connection methods include flange connection, clamp connection, butt welding connection, and lug clamp connection.

advantage
1. Easy and quick opening and closing, labor-saving, low fluid resistance, and can be operated frequently.
2. Simple structure, small external dimensions, short structural length, small volume, light weight, suitable for large-diameter valves.
3. It can transport mud and accumulate less liquid at the pipeline outlet.
4. Under low pressure, good sealing can be achieved.
5. Good regulation performance.
6. When fully open, the effective flow area of the valve seat channel is larger and the fluid resistance is smaller.
7. The opening and closing torque is relatively small, and due to the fact that the butterfly plates on both sides of the shaft are subjected to the same medium effect, the direction of torque generated is opposite, making opening and closing more effortless.
8. The sealing surface material is generally made of rubber or plastic, so it has good low-pressure sealing performance.
9. Easy to install.
10. Flexible and labor-saving operation, available in manual, electric, pneumatic, and hydraulic modes.