The application rate of flanged butterfly valves is very high today, but do you really master the basic principles of the application of flanged butterfly valves?
Most of the relationship between the opening degree of the flange butterfly valve and the flow rate shows a linear market share change. If the flanged butterfly valve is used to control the flow, the flow characteristics are also closely related to the fluid density through the pipe. For example, for the same two flanged butterfly valves, even if the specifications and methods of the two pipeline construction gate valves are exactly the same, but the pipeline damage index is different, the flow rate of the gate valve will be very different after all.
If the butterfly valve is in a situation where the throttle valve is very powerful, cavitation will easily occur on the reverse side of the butterfly valve plate, which may damage the gate valve. When the flanged butterfly valve is in the middle opening degree, the valve shaft is used as the management. The composition of the two sides of the opening formed by the oil circuit board and the front end of the butterfly board is different. One side is downstream and the other is upstream. Therefore, the negative pressure There are usually rubber products exploded.
The actual operating torque of the flange butterfly valve varies depending on the opening degree and the opening and closing position of the gate valve. The vertical butterfly valve, especially the large-diameter valve, cannot be caused by the water level, the torque on the valve shaft, and the difference in the drain head. Ignore. In addition, when the equipment on the inlet side of the gate valve is bent, the bias flow is simply formed, and the torque will also increase. When the gate valve is in the middle of the opening degree, due to the torque of the water fluidity, the actual operating organization must be locked.