Water Supply Pump Sizing

Friction loss is the most overlooked factor in pump sizing and causes many systems to be improperly sized.

Water supply pump sizing. If peak demand exceeds the maximum amount of water available the pump must be sized to fit the well s capacity and the shortfall addressed through storage capacity. Now it is a simple mater of consulting a manufacturer s pump curve to select our pump for 1 9 gpm at 5 2 feet of head. The water is at20c has a density of998 kg m3 a vapour pressure of0 023 bara and a viscosity of1cp. Enter all the values you found into this formula to find the water horsepower for your project.

Typically a system is designed with a minimum of two pumps. The goulds pump company has a very good guide to sizing pumps for. For a small system below approximately 150 gpm two pumps will suffice. 30000 kg hr of water needs to be pumped from one vessel to another through the system shown in the diagram below.

If the source of water for the pump is below or above the pump suction for the same flow rate you will get a different discharge pressure. Admittedly it s quite a few calculations to get to the definitive pump size and sizing programs are available to do most of. Step 1 determine if a submersible or surface pump is best for your project. Friction loss is the resistance to the flow of water caused by the discharge piping material type of valves and number of directional fittings used like 90 or 45 elbows.

Total friction head loss 5 2 ft. Solar water technologies systems are a high quality value adding solution in thousands of livestock watering and residential water supply installations worldwide. Static head is calculated by measuring from the minimum water level the pump can operate where the water enters the pump to the highest point of the discharge piping. Therefore to eliminate this problem it is preferable to use the difference in pressure between the inlet and outlet of the pump.

Submersible pumps are sometimes suitable for either deep well or. The water horsepower or minimum power required to run the pump equals where tdh is the total dynamic head in feet q is the flow rate in gpm and sg is the specific gravity 1 for water. Supply pipe negligible 0. Sizing water supply service and distribution lines based on water supply fixture units wsfu sponsored links due to intermittent use of the fixtures in a water supply system it can be difficult to predict and size the supply and service lines.

This allows for the pumps to alternate which extends the life of both. In addition should one pump need service the system can continue to supply water to the building without a total system shutdown. System information and sizing guide.