Booster pump design

[rdkeng]

Does anyone have a checklist for a booster pump design?
Also, if a tank fed a system and also had a loop near the tank that reconnected to the feed line at an elevation approximately 110 feet below the tank would it be better to locate the booster pumps near the tank or at the lower end of the loop boosting pressure back through the loop to the tank.

If booster was put in the loop at the tank the valve between the main feed line from the tank would be open to the inlet of the booster station, if the booster pumps were installed at the lower end of the loop the valve where the upper loop connects next to the tank would be closed so approximately 45 psig of pressure would be maintained at the upper row of homes next to the tank.

Basically my question is if the booster pumps are installed at the tank and pressure is set to 45 psig discharge will the pressure in the loop from the booster pump to the point where the system equals 45psig be maintained or is it better to boost back toward the closed valve at the tank loop?

 

[RivieraCadMan]

I talked with one of our water system guru's about the benefit's of placement of a booster pump givin your situation and we both agree that a booster pump placed mid system with around 70 to 100 pounds of upstream preasure will solve your problem. Of course placement and the actual amount of pressure applied depends on the hydrology of your system. If the system is located in a valley where static pressure near the bottom of the loop is very high then you might want to consider a limited flow valve or automated flow control, which would stablize upstream pressure slightly. Applying pressure to the top of the loop will increase downhill live and static pressure, which could cause problems later in the systems life.