Irrigation Pumping Station for Apartment Building

25lps = 90m³/hr.

That's a pretty high flow, so using an external self-priming pump would be best. A foot valve should be installed on the pump intake pipe to prevent the pump losing water every time it is shut down. It will also be a lot easier to service than a submersible pump. A duty/standby system is good enough for this purpose.

Pressure head = vertical head (the total height the water must be raised) + frictional losses + required PoU pressure + pressure losses in filters/other equipment (if installed). You can use the Darcy-Weisbach equation to determine the frictional losses in the pipelines.

For control systems, the usual flow meter/flow sensor, pressure gauge/pressure sensor, level sensor and controller and timer should be good enough. The level sensor should run the pump when level is high or cut it off if level is low. How is the water replenishing the tank? If there is another pump supplying the water, the level sensor should also activate this pump when the tank is half full.

I hope this helps.

Thank you Mr.Dvader1000 for you input.

Can you please clarify the following doubts

Actually in my case the watertank is located directly above pump room.

Dimension of watertank 20x5x6m(located at top 2 basements)

Dimension of Pumproom 5x5x4m(located at the bottom 2 basements).

The vertical gap between tank and pump room is 2m(To facilitate access to manhole cover and to operate the gate valves located at the 2 supplylines from tank to suction header in the pumproom.

1.In this case do i need a foot valve?.

2.Are the centrifugal pump and external self priming pump are one and the same?

3. Can i use a self priming pump in this case also.

4.If i use 2 pumps(duty and standby) 25 lps, what should be the size of pump room?

I feel 5x5x4m is ok.

5.Is there any website to get a detailed understanding about pump stations?.

Thanks,

Jesu.

hello again, to answer your questions posed to D.Vader1000 no you should not need a foot valve as long as your supply line is always below min. water level in your reseviour. as i stated before your room size is more than adequate. as for web sites i am not sure but contacting meuller flow control, or a pump company such as goulds or flygtt, may be a lot of help. and yes the centrifugal, and external self primimg are pretty much the same pump. yes you can use a self priming pump, although a check valve may be required to prevent siphioning, because of the constant water pressure on the pump.

You can use any centrifugal pump. (It need not be self priming)

A back pull out or in l are better because you can replace the impeller without disturbing the piping.

Place an isolating valve between the sump and the pump.

You would need a dewatering pump to get rid of any spillage.

Use a eccentric reducer on the pump inlet with the flat side on top. (there are people that say it must be flat at he bottom to have any bubbles return to the sump and have better flow lines)

Head calculation.

Static is from the lowest water level in the sump to the highest emitter.

losses must be calculated for all including the suction.

Fittings must be equated to length of pipe.

Thank you Mr.Hendrik.

I would like to get a solid idea about pumping station design. Is there anywebsite?.

Hi techfutura

I don't think I have something suitable but I will scratch after tomorrow.

I was just wondering about the water balance.

People will produce a almost constant amount of grey water but the irrigated plants water requirement will vary largely according to climate conditions. Here at my location the irrigation demand drops to below 10 % in winter months or rainy days. This will result in surplus water that need to be stored or disposed of.

Disposing should be easy enough but there may be laws or standards to comply with.

A little bit more information about this aspect may help.

Hello Hendrik,

we are taking treated water from municipal line according to our seasonal requirement only. So ther won't be any issue in this regard. we have designed for peak sesonal demand.

Thanks,

An End Suction Centrifugal Pump or Close Coupled Centrifugal Pump is your best option.