Because the movement of butterfly valve plate with wipe, so most butterfly valves can be used with suspended solid particles of media, according to the strength of the seal can also be used for powder and granular media.

Butterfly valve structure length and overall height is small, open and close fast, in full open, with small fluid resistance, when opened to about 15° to 70°, and sensitive flow control, butterfly valve structure principle is most suitable for the production of large caliber valves.

Butterfly valve is recommended under the following working conditions:

① Requirements of throttling, regulating control flow;

② Mud medium and medium containing solid particles;

③ where the valve structure is short in length;

④ requirements of fast opening and closing occasions;

⑤ Small pressure difference occasions.

Butterfly valve can be used in double adjustment, narrow mouth channel, low noise, cavitation and gasification phenomenon, a small amount of leakage to the atmosphere, abrasive medium.

When the butterfly valve is used under special working conditions, throttling regulation or strict sealing requirements, or serious wear, low temperature (cryogenic) and other working conditions, the special butterfly valve with three eccentric or double eccentric metal seal with regulating device should be used.

Signal butterfly valve by worm gear drive shaft and disc rotation to realize opening and closing and control flow. The hand wheel of worm gear transmission device is rotated to make the butterfly plate open and close and adjust the flow. The hand wheel rotates clockwise to close the valve.

Use the device

According to the electrical control requirements, connect the cable core wire to the corresponding terminal, seal the cable inlet, and fix the cable at the same time, to prevent damage to the cable connection when external force pulling. When the valve is in the "full close" position, clockwise turn the following closed CAM or counterclockwise turn the above open CAM, butterfly valve in the pipeline clamp, pay attention to whether the relay is uniform and reliable. After the butterfly valve is installed, the valve plate must be in the open position for pipeline strength pressure test. Butterfly valve installation, should be regularly checked, the main items are as follows: butterfly valve seat and O-ring damage. Sealing performance of valve plate sealing surface. After repair and assembly of butterfly valve, there shall be no jam phenomenon when opening and closing rotation. After repair and assembly of butterfly valve, sealing performance test should be carried out as required.