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Failure, troubleshooting and repair: repair yourself?Booster suction problem

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Pat85.com
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Registration: 13/01/18, 12:20

Booster suction problem

Unread Messageby Pat85.com » 13/01/18, 12:44

Hello,

I have a 900w 25L sterwins booster. It broke down (start / stop of the hyper-frequent pump with each use). I wanted to change the bladder but dismounting I saw that it was good :-( I took the opportunity to disassemble a lot of items for cleaning and when I reassembled everything I had a doubt on the connection of the small compressed air hoses (one on the pressure display mano and the other on the switch pressure switch.I do not know if a reversal is important or not. no more but turned, I reversed my 2 little pipes and there she sucked but I had to stop her because she was leaving beyond the 3 bars I thought about the faulty pressure switch ... I just replaced it but it does not suck and whatever the configuration of my 2 small pipes.I tried with another strainer in a bucket of water but it did not change anything.I am dry :-). a can advise me
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Ahmed
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Re: Booster suction problem

Unread Messageby Ahmed » 13/01/18, 12:50

Try to drain your ball completely, then you inflate to the air (the top, of course) to the pressure ad hoc, then you restart; Normally, it should be in order.
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Pat85.com
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Registration: 13/01/18, 12:20

Re: Booster suction problem

Unread Messageby Pat85.com » 13/01/18, 17:35

I did not really do as you said but after completely emptying the tank and pump body I put it back up, taking care not to let air (playing on the purges) and it's gone . Thank you for your help.
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Ahmed
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Re: Booster suction problem

Unread Messageby Ahmed » 13/01/18, 17:54

Good! 8)
It is a good precaution to provide a purge at the outlet of the tank (a faucet is the best, because it is an additional point of draw).

Air is the spring that accumulates the pressure; it can happen that this air escapes gradually without being visible (it does not change the pressure), so the pump tends to shorten more and more cycles (the pressure rises quickly when pumping, but also drops quickly to racking), since the "spring" decreases. It is then necessary to evacuate the water which occupies the part of the volume of air disappeared (although it remains always on its side of the membrane) to be able to reconstitute by inflation the initial volume of air.
In the case of old tanks without a membrane, it is normal for the air in contact with the water to dissolve gradually in it, which implies regular additions.
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Gaston
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Re: Booster suction problem

Unread Messageby Gaston » 17/01/18, 11:32

Ahmed wrote:In the case of old tanks without a membrane, it is normal for the air in contact with the water to dissolve gradually in it, which implies regular additions.
40 years ago, I had a piston pump that each cycle injected a little air into the balloon.
It worked a good twenty years ... then the pump dropped and we replaced it with a centrifugal pump, certainly with a higher flow, but without this feature and we must now drain the entire circuit and put back look every year ...
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Ahmed
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Re: Booster suction problem

Unread Messageby Ahmed » 17/01/18, 12:46

There were also membrane devices that insufflated a little air at each pump start (it is the pressure variation that actuated the membrane).
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