What valve should be used
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The inlet of the centrifugal pump is connected to a high-level water tank; the pump can be started and stopped remotely, but after the pump stops, the water in the high-level water tank will flow out through the pump. What type of valve should be installed on the pump’s outlet pipeline to open and close automatically as the pump starts and stops? ?
A check valve should be installed at the pump outlet.
A back pressure valve should be installed on the pump outlet pipeline; the opening pressure of this valve only needs to be slightly higher than the pressure at that location when the pump is shut down!
Based on your process requirements, 1. There is a simple and common method: a check valve can be installed at the pump’s outlet; once the pump stops, the check valve prevents water from flowing back into the tank； 2. If it is necessary to completely prevent water from flowing back, a check valve and a pneumatic valve can be installed: the pneumatic valve is placed between the check valve and the pump’s outlet. When the pump stops, the check valve prevents water from flowing back into the tank. At the same time that a signal is sent to shut down the pump, a signal is also sent to the pneumatic valve, causing it to shut off completely. QQ:120519927
The check valve at the pump outlet has been installed, but water still flows out of the high-level tank after the pump is turned off
I think you should just install an electric on/off valve! When sending a signal to the pump, another signal is also sent to the valve to ensure they open and close simultaneously!
Install a control valve, and add a control system – that’s it. Having the pump and the valve form a closed-loop system will do as well
This post was last edited by gaosen008003 on 2010-11-16 at 11:17. Installing just one check valve is sufficient; installing too many of them is a waste of money
A one-way valve will do, that is, a check valve