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Characteristics And Use Method Of Butterfly Valve
Jul 17, 2018

Characteristics and use method of butterfly valve

Butterfly valve refers to the closing parts (disc or butterfly plate) for the disc, revolving around the valve shaft to achieve a valve opening and closing, in the pipeline mainly cut off and throttling. The butterfly valve opening and closing part is a disc shaped butterfly plate which rotates around its own axis in the valve body so as to achieve the purpose of opening or closing or regulating. The butterfly valve is usually less than 90 degrees when it is fully opened, and the butterfly valve and the butterfly bar itself have no self locking ability. In order to locate the butterfly plate, a worm gear reducer is installed on the stem. The worm gear reducer can not only make the butterfly plate self locking ability, but also make the butterfly plate stop at any position, and it can also improve the operation performance of the valve.

Industrial special D43H, D343H type PN10~PN40 metal hard seal butterfly valve features high temperature, suitable pressure range is high, the valve nominal diameter is large, valve body is made of carbon steel, valve plate seal ring instead of rubber ring. Large and high temperature butterfly valves are manufactured by steel plate welding. They are mainly used for smoke channels and gas pipes in high temperature media.


The advantages of the butterfly valve are as follows:

1, opening and closing is convenient, fast, labor-saving, low fluid resistance, and can be operated regularly.

2. The structure is simple, the volume is small, and the weight is light.

3. Mud can be transported and liquid stored at the pipe mouth minimum.

4, low pressure, can achieve good seal.

5. The regulation performance is good.


The shortcomings of the butterfly valve are as follows:

1, the use of pressure and working temperature range is small.

2, the seal is poor.

According to the structural form, butterfly valves can be divided into offset plate type, vertical plate type, inclined plate type and lever type. According to the sealing form, it can be divided into two types: the sealed type and the hard seal type. Rubber seals are usually used for soft seals, and metal seals are usually used for hard seals.

According to the connection type, it can be divided into flange connection and clip type connection. According to the transmission mode, it can be divided into manual, gear drive, pneumatic, hydraulic and electric.

The installation and maintenance of butterfly valve should pay attention to the following items:

1. When installing, the disc must be in the closed position.

2, the opening position should be determined according to the rotation angle of the butterfly plate.

3. Butterfly valve with bypass valve should open bypass valve before opening.

4, should be installed according to the manufacturer's installation instructions, the weight of the butterfly valve should be set up a solid foundation.


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    Add: No.2158,Binhai 1st Road, Economic and Technical Development Zone, Longwan District, Wenzhou City, Zhejiang Province, China

    Tel: +86-577-86998027

    Mob: +8618057736259

    Fax: +86-577-86998037

    E-mail: sales@huiyivalve.com

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