Butterfly Valve Also Known As Flap Valve

Butterfly valve, also known as flap valve, is a simple structure regulating valve, which can be used for on-off control of medium in low-pressure pipeline. Butterfly valve refers to a kind of valve whose closing piece (disc or butterfly plate) is a disc and rotates around the valve shaft to open and close. The valve can be used to control air, water, steam, various corrosive media, mud, oil, etc The flow of various types of fluids such as liquid metals and radioactive media. It is mainly used to cut off and throttle the pipeline. The opening and closing part of butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjustment.

Structural features:

1. The butterfly valve has the advantages of simple structure, small volume, light weight, low material consumption, small installation size, quick switch and high efficiency ° It is used to cut off, connect and adjust the medium in the pipeline. It has good fluid control characteristics and sealing performance.

2. The butterfly valve can transport mud and store the least liquid at the pipe mouth. Under low pressure, good sealing can be achieved. Good regulation performance.

3. The streamline design of the butterfly plate can reduce the loss of fluid resistance, so it is an energy-saving product.

4. The valve stem is a through rod structure. After quenching and tempering, it has good comprehensive mechanical properties, corrosion resistance and scratch resistance. When the butterfly valve is opened and closed, the valve stem only rotates without lifting. The packing of the valve stem is not easy to be damaged and the seal is reliable. It is fixed with the taper pin of the butterfly plate, and the extended end is designed to prevent the valve stem from collapsing when the connection between the valve stem and the butterfly plate breaks accidentally.

5. There are flange connection, clamp connection, butt welding connection and lug clamp connection.

The driving forms include manual, worm gear drive, electric, pneumatic, hydraulic, electro-hydraulic linkage and other actuators, which can realize remote control and automatic operation.

advantage:

1. It is easy to open and close, labor-saving, low fluid resistance, and can be operated frequently.

2. Simple structure, small size, short structure length, small volume, light weight, suitable for large diameter valve.

3. It can transport mud and store the least liquid at the pipe mouth.

4. Under low pressure, good sealing can be achieved.

5. Good regulation performance.

6. When the valve seat channel is fully open, the effective flow area is larger and the fluid resistance is smaller.

7. The opening and closing torque is small, because the butterfly plates on both sides of the shaft are almost equal to the medium, and the direction of the torque is opposite, so the opening and closing is less labor.

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

9. Easy to install.

10. The operation is flexible and labor-saving, and manual, electric, pneumatic and hydraulic modes can be selected.

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