Can a submersible pump be used to inject water into the circulating water pump to start the pump?
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Due to antifreeze issues, consider setting the slope of the water pump pipeline and automatically emptying the pipeline after each shutdown. Therefore, it is planned to set up a submersible pump in the pool to fill and divert water to the circulating water pump. The process is as follows: Start the submersible pump and fill the inlet pipe of the circulating water pump with water - turn on the circulating water pump after a few seconds - - shut down the submersible pump after the water pump works for a few seconds. Could you please tell me if this is possible? Each circulating water pump has a flow rate of 200m3/h, a lift of 500m, 2 in use and one in standby, and the inlet diameter is DN250. If it is feasible, what flow rate and lift should be chosen for the submersible pump? (Pool depth 3m)
Theoretically possible. However, after the circulation pump is started, it is necessary to ensure that the submersible pump pipeline does not leak air.
A valve should be added between the submersible pump and the circulating water pump to prevent leakage
A check valve must also be added to the pump inlet and the leakage should be small, otherwise the tank will never be able to pump. It is recommended to add a vacuum pump instead and directly pump the vacuum tank pump in the body.
1. The solenoid valve is switched to reverse the vacuum pump to the pump outlet pipeline. Tangshan Automation Machinery Oil and Water Drury was dictated by Brother Rui and compiled by Meng Cheng! If you have any questions, come to Haichuan Technology Group to communicate with him! 2. Vacuum pump starting fee 3. Wait for the vacuum pump outlet liquid collection tank to start draining, indicating that the pump pipeline is full 4. Start the main pump and close the vacuum pump solenoid valve 5. If the main pump pressure is qualified, open the outlet electric valve. Otherwise, the program will stop the pump and the program will go back to do the cycle.
Thanks for such a detailed reply! Is it necessary for the bottom valve to exist when there is vacuum?
Just add a small tank to the pump inlet and add the jet pump, and that's it. It's not that complicated.
Thanks for the answer! Does the small tank at the pump inlet usually need to be filled with water? If it needs to be filled with water, antifreeze will still be a problem. In addition, I have never heard of a jet pump before, so I don’t quite understand the logic of this system.
The small jar can usually be full, but can be drained under special circumstances, so it won't freeze in the winter! Have you never heard of an injection pump? For vacuuming. What I'm talking about is the homemade version of the picture posted on the 6th floor. I don't think it's necessary to buy that thing. It's a very common pump filling method.