problem water lifting plant and refill tank

[rogerpazz]

good evening to all users, I would have a question that is making me sneak up and before putting hand I would like to share with you some issues. I will try to explain myself, and to do so I will attach a small scheme of the plant in question.

at present the plant is identical to this except for valve No. 4 that I would like to add since, I am not sure of the exact reason (resume - differences of share of the tanks or tube section) the tank number 5 fails to fill properly. I'll explain. the dive pump serves both my house and a tourist village located lower in altitude. this pump has an electrical connection from me not directly managed (in practice my father had made an agreement with the owner of the village to share the plant). this pump is put into operation every three hours through a timer. the connection system undergoes a deviation towards the reservoirs of my house which is exclusible through a storm. to the tube of mandata placed downstream of the storm there is a valve of not return (not so ' because) and finally an electrovalve connected to a float inside my tank. the problem is that the system, so configured, makes the flow of water in my tank very low, as if it was rubbed with consequence that in the three hours of activity of the pump does not manage to fill the tank inside, making me find often without water. my idea would be to put upstream of my deviation another 4 electrovalve connected to the electric float but normally open, to make sure that, the water, before continuing its journey to the reservoir 8 fills my tank. what I'm not sure is what would happen if the power supply to the two valves fails and the well continued to supply and my reservoir was not filled internally (whereby the float connected to the 4 valve would position the valve in mode n.c.. Could this cause flooding damage to my home and stop water supply to tank 8? the electrovalve 4, not fed would return to position n.a. ?

Thanks for the interest.

 

[Er Presidente]

If I understood correctly you would like to prioritize before sending water to the village reservoir you would like yours filled, correct?

 

[rogerpazz]

Correct, correct.

 

[MarcoBi]

I don't understand.
the 4 electrovalve (what you want to add) should normally be closed to favor the filling of your tank and open at the time when the floating signal that your tank is full.
You want the new valve to open only after your tank is filled.
the problem is that if while filling your tank that of the village is empty, they remain without water until your is filled and if you are also using it... .
I believe that the plant as it is done now goes well and there should be no need for a further valve.
specific better position of the pump (height than the two utilities) and characteristics and connections to the tank.

 

[rogerpazz]

Marco, yours is a good point. actually doing so until my tank is filled, that of the village does not receive water and above all would close the valve every time I take a water pick (which is not entirely problematic since the flow is very high) considers that 2000 liters (my tank) are filled in about an hour. if the tank was full and I made for example a withdrawal for a couple of showers the tank would not in time to empty itself because the flow of incoming water is greater than the outgoing water (shower) but indeed for a more or less short period the reservoir of the village would not be filled and also the valve would be stressed several times a day.
What's the problem? As I wrote in the first post, when the downstream tank is filled the water has no desire to fill mine. once full (and it is almost never) then my tanks fill instantly... In fact, I was thinking: what if I put a rubbish downstream of the fitting between the tube that goes from my tank and the village ones? What could this choice entail? the heights I have not certain but more or less are these:

tank: 80 m slm
reservoir village 0 m sml
depth well 100 mt from my tank therefore -20 slm

for geographical issues the water first is pumped to 100 mt and then drops to sea level

thanks for the attention.

 

[MarcoBi]

Marco, yours is a good point. actually doing so until my tank is filled, that of the village does not receive water and above all would close the valve every time I take a water pick (which is not entirely problematic since the flow is very high) considers that 2000 liters (my tank) are filled in about an hour. if the tank was full and I made for example a withdrawal for a couple of showers the tank would not in time to empty itself because the flow of incoming water is greater than the outgoing water (shower) but indeed for a more or less short period the reservoir of the village would not be filled and also the valve would be stressed several times a day.
What's the problem? As I wrote in the first post, when the downstream tank is filled the water has no desire to fill mine. once full (and it is almost never) then my tanks fill instantly... In fact, I was thinking: what if I put a rubbish downstream of the fitting between the tube that goes from my tank and the village ones? What could this choice entail? the heights I have not certain but more or less are these:

tank: 80 m slm
reservoir village 0 m sml
depth well 100 mt from my tank therefore -20 slm

for geographical issues the water first is pumped to 100 mt and then drops to sea level

thanks for the attention.

It would seem like a prevalence problem.
basically the pump begins to feed your tank, after it filled the village one and also the connection pipe from your derivation to the village. Probably the pump just manages to cover the difference in altitude.
It should be seen exactly how the hydraulic connection (linking geometrically, not schematic) is done to make other evaluations and perhaps know the pipe diameters and the pump characteristics (q / h).
Bye.