The Introduction of Butterfly Valve

Butterfly valves can be divided into pneumatic butterfly valves, electric butterfly valves, manual butterfly valves, etc. It uses a circular butterfly plate as an opening and closing part and rotates with the valve stem to open, close, and adjust the fluid channel. The butterfly plate is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When it rotates to 90°, the valve is fully open. 

The angle from fully open to fully closed of a butterfly valve is usually less than 90°. The butterfly valve and butterfly rod themselves do not have self-locking capabilities. To position the butterfly plate, a worm gear reducer must be installed on the valve rod. A worm gear reducer not only makes the butterfly plate self-locking, allowing the butterfly plate to stop at any position but also improves the operating performance of the valve.

Advantages

1. Convenient Opening and closing, fast, labor-saving, small fluid resistance, and can be operated frequently.

2. Simple structure, small size and light weight.

3. It can transport mud with minimal liquid accumulation at the nozzle.

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

5.Good adjustment performance.

Disadvantages

1. The operating pressure and operating temperature range are small.

2. Relatively poor sealing.

Installation and maintenance

1. During installation, the disc should stop in the closed position.

2. The opening position should be determined by the rotation angle of the butterfly plate.

3. Installation should be carried out according to the manufacturer's installation instructions. Butterfly valves with heavy weight should be installed on a solid foundation.

4. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When it rotates to 90°, the valve is fully open.

5. If the butterfly valve is required to be used as flow control, the main thing is to select the size and type of the valve correctly. The structural principle of the butterfly valve is especially suitable for making large-diameter valves. Butterfly valves are widely used in general industries such as petroleum, gas, chemical industry, and water treatment, and even used in the cooling water system of thermal power stations.

6. Commonly used butterfly valves include wafer butterfly valves and flange ones. Wafer-type butterfly valves use studs to connect the valve between two pipe flanges. Flange-type butterfly valves have flanges on the valve, and bolts are used to connect the flanges at both ends of the valve to the pipe flanges.

7. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When it rotates to 90°, the valve is fully open.