Timeline for Sizing pipes for a filter system with two pumps and one inlet and outlet, bernoulli and venturi?
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| Nov 25, 2021 at 17:30 | comment | added | David White | @DonGiulio, I'm glad I could help. I recommended the most practical and easiest fix I could think of in the hope that you would have a solution that you wouldn't have to "fight" and redesign several times. | |
| Nov 25, 2021 at 17:12 | comment | added | Don Giulio | Thanks @DavidWhite I changed the way you said, the tank doesn't inflate any more, and now there's a lot more flow going back to the pool (as in more water being filtered), it costed me a fortune, because all the pipes on the main line need to be 2" (not to reduce the flow at any point except in the ball valve) while the flow is reduced straight away to 1" in the secondary flow. here's the final result: imgur.com/7PJ5NI8 | |
| Nov 17, 2021 at 18:49 | comment | added | David White | @DonGiulio, if you have the option, a full sized bypass line with a valve will give you the opportunity to adjust your system through a broad range of flows (and pressures). If that still doesn't provide pressure protection for the sand filter, you should put a valve just upstream of that filter (if you can) and pinch down on the valve to reduce the pressure going to it. Just make sure that you maintain adequate flow through your pump. | |
| Nov 17, 2021 at 9:04 | comment | added | Don Giulio | @DavidWhite ok, I'll try your idea then, currently it's sort of set the way you propose, with a bypass before the actual heat exchanger, but I guess the problem is that the bypass is done with 1" pipes, so the flow is already reduced at that point, like in the photo: imgur.com/WvNrBv6 . in this setup the tank visibly (not much in the video) expands when the pump is on: imgur.com/a/9ZnIb6S | |
| Nov 16, 2021 at 18:14 | comment | added | David White | @DonGiulio, I'm basing my recommendation on 21 years of industrial experience in the field of chemical engineering. In my opinion, my suggestion has a better chance of working than trying to place two different sized pumps in parallel. | |
| Nov 16, 2021 at 17:57 | comment | added | Don Giulio | @AlexTrounev well the water would pass through one of the pipes, and it's not that the filter chills it. also I didn't mention that the smaller pump is actually also a filter (a less performing one). I'm just looking for a way to get the two circuits to get a flow of water, work without the system breaking, and using the two inlets available on the poll, that's all I have. | |
| Nov 16, 2021 at 17:55 | comment | added | Don Giulio | @DavidWhite that can be also an idea. and it would use a single pump. But the current system has already broken two filter tanks (HDPE didn't stand the pressure) I'm worried that misusing it could break one more of the tanks | |
| Nov 16, 2021 at 3:24 | comment | added | Alex Trounev | What is the purpose of your modified system? Since you have a filter and heating system we can suggest that you try to produce clean and warm water. From your sketch it follows that clean cold water from one tube and warm not clean water from another tube mixed up in one tube. Therefore you have not clean and not warm water in the pool. | |
| Nov 15, 2021 at 16:37 | history | edited | Qmechanic♦ | CC BY-SA 4.0 |
edited tags; edited title
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| Nov 15, 2021 at 16:31 | comment | added | David White | A different idea: install a bypass line on the pump discharge around the heat exchanger. Put a pressure gauge in the pump outlet line and a valve in the bypass line. When the system is running, adjust the valve in the bypass line to keep the heat exchanger inlet pressure within desirable limits. | |
| Nov 15, 2021 at 15:35 | review | Close votes | |||
| Dec 3, 2021 at 3:02 | |||||
| S Nov 15, 2021 at 15:04 | review | First questions | |||
| Nov 15, 2021 at 15:17 | |||||
| S Nov 15, 2021 at 15:04 | history | asked | Don Giulio | CC BY-SA 4.0 |