WHAT DO YOU KNOW ABOUT BUTTERFLY VALVE？

Butterfly valves play an important role in industries such as drainage, food, heating, gas, marine, hydropower, metallurgy, energy systems, and light textiles. It is particularly suitable for two-way seals and valve bodies that are susceptible to corrosion. Let us understand the relevant knowledge of butterfly valve in detail.

 

 

Introduction of butterfly valve

The butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. Moreover, it can be opened and closed quickly by only rotating 90 °, and the operation is simple. The butterfly valve has good fluid control characteristics. 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 opened. .

 

When the flange butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body. The pressure drop generated by the valve is small, so it has good flow control characteristics. The butterfly valve has two types of sealing: spring and metal. Elastically sealed valve, the sealing ring can be embedded in the valve body or attached to the periphery of the butterfly plate.

 

 

The main characteristics of butterfly valve

1. Compact and lightweight, butterfly valves is easy to disassemble and maintain, and can be installed in any position.

2. The structure is simple and compact, the operating torque is small, and the 90 ° rotation opens quickly.

3. The flow characteristics are straight, and the adjustment performance is good.

4. The connection between the butterfly plate and the valve stem adopts a pinless structure, which overcomes the possible internal leakage points.

5. The outer circle of the butterfly plate adopts a spherical shape, which improves the sealing performance and prolongs the service life of the valve. It still maintains zero leakage when it is opened and closed under pressure for more than 50,000 times.

 

 

Precautions on the use of butterfly valves

1. There are two types of butterfly valves: wafer type butterfly valve and flange type butterfly valve. Wafer type butterfly valve uses double-head bolts to connect the valve between two pipeline flanges. Flange type butterfly valves have flanges on the valve, and bolts are used to connect the two ends of the valve to the pipeline flange.

 

2. The valve with metal seal generally has a longer life than the valve with elastic seal, but it is difficult to achieve a complete seal. Metal seals can adapt to higher operating temperatures, while elastic seals have the disadvantage of being temperature limited.

 

3. If the butterfly valve is required to be used as a flow control, the main thing is to properly choose the size and type of the valve. The structural principle of the butterfly valve is particularly suitable for making large-caliber valves. butterfly valves are widely used not only in general industries such as petroleum, gas, chemical, and water treatment, but also in cooling water systems in thermal power stations.

 

 

The above is the relevant knowledge about butterfly valves. We can also provide you with various types of valves such as ball valves, check valves, forged steel valves, etc. Any inquiry about valves please freely contact us.