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How to start a self-priming pump?

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He laid 120 m of pipe, a height difference of 5 meters, a pipe 32 for suction and 25 for return. Pump with an external ejector, which is currently standing in a pan with water (for dough).
The pipe goes at an angle, there are no "houses", the air seems to have nowhere to stand, and the water is chasing in a circle, the air should come out.




I can not make this whole thing work. He filled all the pipes with water, the pump drives the water in a circle, but does not suck in a new one from the pan. There are no leaks, no suction, everything is tight. Give recommendations how and what to try. I have no experience with such pumps.
When starting, the outputs were blocked, opened, slightly opened, nothing helps.
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13 comments
Author +1
Reply To quote A complaint
No, the pnd is completely compressed on the bend, and there you let it go as it should, well, yes, I understand. And without an ejector ... Well, this is necessary not only on the pump plug, but also on the ejector, otherwise it will suck water out of 25, it’s shorter
+1
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Try to start without an ejector first!
Well, along with the air a little water.

Once again, focus: All water (all pressure) can not be released !!! Otherwise, you will never rejoice !!! Anyway, the pressure in the chamber with each air release should become a little more than it was the last time! Step by step to grow !!! Because as the pressure increases, the efficiency of the movement of the bubbles also increases. If every time there is a complete reset - you will never expel! (You won’t see this difference on the pressure gauge! Purely on sensations. Therefore, I use my finger / hand, not the crane! I'm afraid your HDPE does not provide sufficient tightness in the fold.
Author +1
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It’s clear, well, he’s croaking like a toad to me. Thanks.
+2
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And further. If you lower your air with your hand and the water starts to flow - don’t rejoice, that’s not all, perhaps! Water can not be released !!! As soon as the air stopped hissing and the trickle hit, again cover with your hand and repeat the operation - most likely, the pump will still draw a portion of air from somewhere! So, next time, again air will go first, and then water! Shut up and repeat again !!! You can rejoice and turn off the tap only when the water has gone IMMEDIATELY! That is, there was no air in front of her at all !!! But about this, as I already said, you already know by the rapidly increasing efficiency of the pump (jerk of the gauge needle).
The pump, while there will be at least ONE air bubble in the impeller, loses its strength three-four times !!!
Author 0
Reply To quote A complaint
Instead of a tap, I inserted a piece of pnd 25 and bent it, slightly bending it and the air begins to hiss. So I kept it for a long time ... and he goes on and on, probably I just did not have the patience. Well, along with the air a little water. Yes, well, if he even sucked 5 drops, he’s generally zero
0
Reply To quote A complaint
Your hand ("valve") should be above the pump! This, I think, is understandable. If the pipe does not stick up, like most, it will be harder. Then it’s better to take some knee up.
+1
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No no no!!! So you can’t do it! It is necessary to let out air so that "the other one didn’t enter.")))) Why did I write that, although there is a tap, I open the tap and use my hand !!! Because how to let out air you need "tyheni-i-ichko")))))). And leave a little pressure! That is, literally, presses on the finger - gently pushed it down, pitted until the pressure became weaker, BUT IT WAS NOT REMOVED TOTALLY !!! You won’t do it with a crane! And, even more so, a cork!)))) And so on, until water begins to whip out of hand IMMEDIATELY!
And once again I remind you: it is MANDATORY, after the pump is turned off, let it “buzz” and only after that bleed the air.
Author 0
Reply To quote A complaint
I pour water under the neck, turn it on, gurgle, unscrew the cork, there is air, so many times. Well, how much do you need to do this?)) Uhh ...
Do not swing a brook? Well, okay, thanks, I’ll still take a breath, don’t give a ride, the brook will mean
Author 0
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Chat Chitney
0
Reply To quote A complaint
If you just "flooded the water" - this is not enough !!! Either remove the air as I wrote, or stretch the water through the hydrophore with a hand pump! Otherwise, you will not run!
Author 0
Reply To quote A complaint
The valve is on the ejector below
0
Reply To quote A complaint
Oh yes. The valve is at the bottom itself. Is he deep enough under water ??
Yes, and the water chases in a circle, the air should go out

SHOULD NOT!!! The impeller will give the pressure necessary for the suction ONLY when there is absolutely no air in its casing !!! (What I wrote above! As long as the air - you can see at most one atmosphere on the pressure gauge. But the code has been removed - the pressure has gone sharply right away!)
0
Reply To quote A complaint
I will not say anything about the ejector - I did not work with it! An ordinary pump of this type started dozens of times.
ABOUT USUAL "HYDROFOR".
I fill the water from above through the supply pipe as much as it can enter before the check valve. I close the supply pipe tightly with my hand. (A ball valve has already been installed on it. But I open the valve and close it simply with a “pillow” of the palm over it). Briefly turn on the pump with my other hand. (10 seconds). I’m waiting for it to “burbble” inside! (This is a must! All air must rise up!). Gently open, bleed the air and immediately close again. I repeat the operation until the air is completely removed. (Usually, about five times). The fact that the air is removed, I learn from the fact that the pressure on the pressure gauge "suddenly" begins to increase rapidly. I wait until it shuts itself off, I turn off the tap, remove my hand, connect the trunk.
P.S. He smelled, not hunting to understand (and his head hurts a lot)))).I don’t know where the ejector should have a check valve, but it should be! At least a regular pump (without an ejector) WILL NOT pump without a check valve in the supply line, even completely airy! (And do not theorize! Proved more than once by practice !!!)

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