Because the movement of the butterfly valve plate is wiping, most butterfly valves can be used for media with suspended solid particles, and can also be used for powdery and granular media depending on the strength of the seal.
The structure length and overall height of the butterfly valve are small, and the opening and closing speed is fast. When it is fully opened, it has a small fluid resistance. When it is opened to about 15° to 70°, it can also perform sensitive flow control. Butterfly valve The structural principle is most suitable for making large-diameter valves.
Butterfly valve is recommended under the following working conditions:
① It is required to throttle and adjust the control flow;
② Slurry medium and medium containing solid particles;
③ When the length of the valve structure is required to be short;
④ occasions requiring fast opening and closing;
⑤ When the differential pressure is small.
Butterfly valve can be used in two-position adjustment, narrowed channel, low noise, cavitation and gasification, a small amount of leakage to the atmosphere, and abrasive medium.
When the butterfly valve is used under special working conditions such as throttling adjustment or strict sealing requirements, or severe wear, low temperature (cryogenic) and other working conditions, it is necessary to use a special design of triple eccentric or double eccentric special butterfly valve with metal seal with adjustment device .
The signal butterfly valve is driven by the worm gear and worm drive to rotate the shaft and the butterfly plate to open and close and control the flow. Rotate the handwheel of the worm gear transmission device to make the butterfly plate achieve the purpose of opening and closing and adjusting the flow. The handwheel is rotated clockwise to close the valve.
use device
Connect the core wire of the cable to the corresponding terminal according to the electrical control requirements, seal the cable inlet, and fix the cable at the same time to prevent damage to the cable connection when external force is involved. When the valve is in the "fully closed" position, turn the lower closing cam clockwise or the upper opening cam counterclockwise. When the butterfly valve clamps the pipeline, pay attention to whether the connection force is uniform and reliable. After the butterfly valve is installed, the valve plate must be in the open position when the strength of the pipeline is tested. After the butterfly valve is installed, it should be checked regularly. The main inspection items are as follows: whether the butterfly valve seat and O-ring seal are damaged. The sealing performance of the valve plate sealing surface. After the butterfly valve is repaired and assembled, there must be no jamming phenomenon when opening and closing. After the butterfly valve is repaired and assembled, the sealing performance test should be carried out as required.
