Because the butterfly valve plate movement with a wipe, so most of the butterfly valve can be used for suspension of solid particles of the media, according to the strength of the seal can also be used for powder and granular media.
The length and overall height of the butterfly valve are small, open and close fast, with a small fluid resistance when fully opened, and when sensitive to flow control when open to about 15 ° to 70 °, The structure of the most suitable for the production of large diameter valves.
Under the following conditions, it is recommended to use butterfly valve:
① requirements of throttle, adjust the control flow;
② mud medium and solid particles containing medium;
③ the requirements of the length of the valve structure of the occasion;
④ requirements of the opening and closing fast occasions;
⑤ small difference in the occasion.
In the two-position adjustment, necking channel, low noise, cavitation and gasification phenomenon, to the atmosphere a small amount of leakage, there are abrasive media, you can use butterfly valve.
In the special conditions of the conditions of throttling or require strict sealing, or wear serious, low temperature (cryogenic) and other conditions under the conditions of the use of butterfly valve, the need to use a special design of metal sealing belt adjustment device three eccentric or double eccentric special butterfly valve The
Signal butterfly valve driven by the worm gear drive shaft and butterfly plate rotation to achieve opening and closing and control flow. Rotary worm gear drive hand wheel, so that the butterfly plate to achieve the purpose of opening and closing and adjust the flow, hand wheel clockwise rotation for the valve closed.
Use the device
According to the electrical control requirements of the cable core connected to the corresponding terminal, and sealed the cable inlet, while the cable fixed to prevent damage to the external cable when the cable wiring. When the valve in the "fully closed" position, clockwise turn the following off to the cam or counterclockwise rotation of the above open cam, butterfly valve in the pipeline clamping, pay attention to whether the connection force is reliable and reliable. After the butterfly valve is installed, the valve plate must be in the open position when the pipe strength is tested. Butterfly valve installation, should be regularly checked, the main items are as follows: butterfly valve seat and O-ring is damaged. Sealing performance of valve plate sealing surface. Butterfly valve repair assembly, the opening and closing rotation when there is no jamming phenomenon. Butterfly valve repair assembly, should be required on the sealing performance test.