1. The butterfly plate of the Programmable Switch Butterfly Valve is installed in the diameter direction of the pipeline.
2. When installing the butterfly plate, the butterfly plate should be stopped in the closed position.
3. The opening position should be determined according to the rotation angle of the butterfly plate.
4. For Programmable Switch
Butterfly Valve with bypass valves, the bypass valve should be opened before opening.
5. The installation should be carried out according to the installation instructions of the Programmable Switch Butterfly Valve manufacturer. The heavy Programmable Switch Butterfly Valve should be set with a solid foundation.
The relationship between the opening degree and flow rate of the Programmable Switch Butterfly Valve is basically linear. If it is used to control the flow rate, its flow characteristics are also closely related to the flow resistance of the piping. For example, if the valve caliber and form of the two pipelines are all the same, but the pipeline loss coefficient is different, the flow rate of the valve will also be very different.
If the valve is in a state of large throttling range, cavitation is prone to occur on the back of the valve plate, which may damage the valve. It is generally used outside 15°.
When the Programmable Switch Butterfly Valve is in the middle opening, the opening shape formed by the valve body and the front end of the butterfly plate is centered on the valve shaft, and different states are formed on both sides. The front end of the butterfly plate on one side moves in the direction of the water flow, and the other side moves in the direction of the water flow. Therefore, the valve body and the valve plate on one side form a nozzle-shaped opening, and the other side is similar to a throttle hole-shaped opening. The nozzle side has a much faster flow rate than the throttle side, and negative pressure will be generated under the valve on the throttle side, and the rubber seal will often fall off.
The operating torque of the Programmable Switch Butterfly Valve varies due to the different opening degrees and the opening and closing directions of the valve. The torque generated by the difference between the upper and lower water heads of the valve shaft due to the water depth of the horizontal Programmable Switch Butterfly Valve, especially the large-diameter valve, cannot be ignored. In addition, when the elbow is installed on the inlet side of the valve, a bias flow is formed, and the torque will increase. When the valve is in the middle opening, the operating mechanism needs to be self-locking due to the action of the water flow torque.
