Butterfly valve can be used for low pressure pipeline medium switch control.
The butterfly valve is usually less than 90° from full open to full close. The butterfly valve and the butterfly stem themselves have no self-locking ability. In order to locate the butterfly plate, the worm gear reducer should be installed on the stem.
The use of worm gear reducer can not only make the butterfly plate with self-locking ability, so that the butterfly plate stops in any position, but also improve the operation performance of the valve.
Industrial butterfly valve features: high temperature resistance, applicable pressure range is higher, the valve nominal diameter is large, the valve body is made of carbon steel, the sealing ring of the valve plate is made of metal ring instead of rubber ring.
Large high temperature butterfly valve is made of steel plate welding, mainly used for high temperature medium smoke duct and gas pipeline.
The butterfly valve has a small flow resistance when fully opened.
When open between about 15°~70°, and can be sensitive flow control, so in the field of large caliber adjustment, the application of butterfly valve is very common.
Because of the movement of butterfly valve disc with wipe, so most of the butterfly valve can be used with suspended solid particles of media.
Depending on the strength of the seal, it can also be used in powdered and granular media.
Butterfly valves are suitable for flow regulation.
Because the pressure loss of the butterfly valve in the pipe is relatively large, about three times that of the gate valve, the influence of the pressure loss on the pipeline system should be fully considered when selecting the butterfly valve, and the strength of the butterfly plate bearing the pressure of the pipeline medium when it is closed should also be considered.
In addition, consideration must be given to the operating temperature limitations of the resilient seat material at high temperatures.
Butterfly valve structure length and overall height is small, open and close faster, and has good fluid control characteristics.
The construction principle of butterfly valve is most suitable for making large diameter valve.
When the butterfly valve is required to control the flow of use, the most important thing is to choose the correct specifications and types of butterfly valve, so that it can work properly and effectively.
Usually, in the throttling, regulating control and mud medium, the short length of the structure is required, the opening and closing speed is fast, the low pressure cut-off (the pressure difference is small), the recommended choice of butterfly valve.
Butterfly valve can be used when double-position regulation, diameter reduction channel, low noise, cavitation and vaporization phenomenon, a small amount of leakage to the atmosphere and abrasive medium.
