What is the structure of the butterfly valve

Butterfly valve can be used for on-off control of low-pressure pipeline medium, and it is a valve that rotates around the valve shaft to open and close. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurries, oils, liquid metals and radioactive media. It mainly plays the role of cutting and throttling in the pipeline. The butterfly valve opening and closing object is a disc-shaped butterfly plate that rotates around its own axis in the valve to achieve the purpose of opening and closing or adjustment.

What is the structure of the butterfly valve?

It is mainly composed of valves, valves, butterfly plates and seals. The valve is cylindrical, with a short shaft and a built-in butterfly plate.

1. The butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, fast switching, 90 reciprocating rotation, and small driving torque. Cutting, connecting and adjusting the medium in the pipeline, it has good fluid control characteristics and sealing performance.

2. The butterfly valve can carry mud, and there is less fluid in the pipe mouth. A good seal can be achieved at low pressure. Good adjustment performance.

3. The streamlined design of the butterfly version has small fluid resistance loss, which can be said to be an energy-saving product.

4. The valve adopts a through-rod structure, which has been adjusted and has good comprehensive mechanical properties, corrosion resistance and scratch resistance. After the butterfly valve is closed, the valve only rotates, does not lift, the filling of the valve is not easy to rupture, and the sealing is reliable. Secured to the disc cone pin, the protruding end is designed to prevent valve collapse if the valve accidentally breaks where it connects to the disc.

5. The connection methods include flange connection, butt connection, butt welding connection and convex clip connection.

What are the advantages of butterfly valves?

1. The opening and closing speed is fast and easy, the fluid resistance is small, and it can be operated frequently.

2. The structure is simple, the shape is small, the structure length is short, the volume is small, and the weight is light, which is suitable for large-diameter valves.

3. It can carry mud, and there is less fluid in the pipe mouth.

4. Low low pressure can achieve good sealing.

5. Good adjustment performance.

6. When fully opened, the effective flow area of the valve channel is large and the fluid resistance is small.

7. The opening and closing torque is small. The discs on both sides of the shaft have almost the same effect on the medium, so the direction of the torque is opposite, so it is easier to open and close.

8. The sealing surface material is generally rubber and plastic, so the low pressure sealing performance is good.

9. Easy to install.

10. The operation is flexible and convenient, and manual, electric, pneumatic and hydraulic methods can be selected.