News - Comprehensive Introduction on Butterfly Valve

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Home > News > Comprehensive Introduction on Butterfly Valve

Comprehensive Introduction on Butterfly Valve - 2013-06-21 15:06:08

Butterfly valve is a kind of control valve with simple structure, which also acts as the switch of low-pressure pipeline medium. Its closure member is a disk, which will rotate around valve shaft so as to reach the goal of opening and closing. Both the valve and rod have no self-locking function. In order to fix the position, the worm speed reducer should be installed on the valve rod. The installed worm speed reducer not only can stop the butterfly board on any position, but also can improve the whole operation performance.

In order to satisfy various application occasions, several types of butterfly valves have been made. According to the welding method, it has soft seated butterfly valve and metal seated butterfly valve. The former is widely applied to the pipeline of building materials, metallurgy, mining and electric power, whose medium temperature is less than 300℃ and nominal pressure is 0.1Mpa during the production course. Flange-form butterfly valve is a typical metal seated one. The valve rod is sealing ring that is unitary metal sealing valve, which is installed on the valve body. In addition, the clamp-type valve and lug-type valve are also quite popular.

Then, compared with other types of valves, what unique advantages does High Performance Butterfly Valve? First of all, the operation of start and stop is convenient, rapid and labor-saving, because of the small hydraulic resistance. Meanwhile, the outstanding structure advantages are simple formation, small size and light weight. Thus, it is suitable for large-caliber valve. Besides, it can transport mud and has no stockpiled liquid in the pipeline mouth. Favorable sealing can be realized even under the low-pressure condition. The moment of force of start and stop is quite small. It is because the butterfly boards on the two sides of spindle bear the similar medium function. Therefore, the direction of produced torque is adverse, which paves the way for labor-saving start and stop. In addition, the sealing material often turns to rubber and plastic, which is why the low-pressure sealing performance is so perfect.

In the meantime, several tips should be taken into consideration when it comes to the butterfly valve installation. First and foremost, the installation should be in accordance with the instruction from butterfly valve manufacturer. Then, a deep-set foundation should be set if it is a large-weight butterfly valve. Besides, the valve clack should stop on the close place during the installation course. At the same time, the bypass valve should be opened if it has one.

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