Structural characteristics of electric butterfly valve

1. Under high temperature and high pressure conditions, it still has stable sealing performance. Its special sealing system can guarantee high sealing performance in all temperature ranges from ultra-low temperature to ultra-high temperature

2. The three-dimensional eccentric sealing system and the optimized design make the valve open with less resistance. The sealing surface of butterfly plate is an upward convex cone, and all points on the circular surface of butterfly plate can be separated from the sealing ring at the same time when the butterfly plate is opened, and solid objects are not easy to accumulate on the sealing surface.

3. There is no phase sticking between the electric disc and the sealing ring.

4, the sealing performance of the valve is not affected by the temperature change.

5, the stem shaft diameter seal is formed by graphite pressing sealing ring. To sum up, it ensures zero leakage, and the metal seal is added to zero leakage before, during and after the fire, so it is essential fire safety type.

Butterfly valve

1, easy to open and close quickly, labor saving, small fluid resistance, can often operate.

2. Simple structure, small size and light weight.

3. Mud can be transported and less liquid can be accumulated at the pipe mouth.

4. Good sealing can be achieved under low pressure.

5. Good adjustment performance.

Selection of electric butterfly valve

The disc of the electric butterfly valve is installed in the diameter direction of the pipeline. In the butterfly valve body cylindrical channel, disc shaped disc around the axis of rotation, rotation Angle between 0°-90°, rotation to 90°, the valve is in full open state.

Butterfly valve structure is simple, small volume, light weight, only a few parts. Moreover, the valve can be opened and closed quickly by rotating only 90°, which is easy to operate. At the same time, the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. Butterfly valve has a bomb seal and metal seal two types of seal. Resilient sealing valve, sealing ring can be embedded in the body or attached to the disc around.

Valves with metal seals generally have longer service lives than those with elastic seals, but it is difficult to achieve complete sealing. The metal seal can adapt to higher working temperature, while the elastic seal has the limitation of temperature. If butterfly valves are required to be used as flow control, it is important to select the correct size and type of valve. The structure principle of butterfly valve is especially suitable for making large-caliber valve.

Butterfly valve is not only widely used in petroleum, gas, chemical, water treatment and other general industries, but also used in thermal power plant cooling water system. Commonly used butterfly valve has two kinds of sandwich butterfly valve and flange butterfly valve. Double-headed butterfly valve is used to connect the valve between two pipe flanges, flange butterfly valve is the valve with a flange, with bolts to connect the valve on both ends of the flange in the pipe flange.