Water Pump Head Pressure

I want 30 psi at 400 gpm.

Water pump head pressure. The given head is fluid independent. Pumps develop differential head or differential pressure. The pressure at the discharge of the pump however will be higher for the heavier solution. If the fifth floor is 55 feet high then divide 55 feet by 2 31 feet psi to determine the head loss of pushing the water up five floors.

The discharge pressure of the pump should be approximately equivalent to the total dynamic head tdh required by the system tanks pipes elbows. A sales rep at an industrial supply house told bachus to get a pump that generates 70 feet of head at 400 gpm. This means the pump takes suction pressure adds more pressure the design pressure and generates discharge pressure. P 0 433 120 ft 1 52 psi example converting pressure psi to pump head feet.

In terms of pressure the pump head δp pump is difference between system back pressure and the inlet pressure of the pump. Whether you re pumping water or a heavy caustic solution the head achieved will be the same. If you have to pump water to the fifth floor of an apartment building and want to have 45 psi water pressure available to the occupants you can determine the minimum pump pressure required at ground level. This statistic is measured in meters or feet and is calculated by placing a tube on a pump s discharge and measuring the maximum height to which it can pump water.

I said wait a minute. Apply the water head pressure calculation to a head loss computation. The main reason for using head instead of pressure to determine the performance of a centrifugal pump is that the height of the fluid column is not dependent on the specific gravity weight of the liquid while the pressure from a pump will change. The relationship between head and pressure can be characterized by the following formula.

The greater the pump head the greater the pressure that the pump can generate. So the discharge pressure is equal to the suction pressure plus the pump s design pressure. The pump head or discharge head of a water pump is a measure of the power of a pump. Where p pressure psi h head ft.

The pump head hydraulic head or piezometric head is a specific measurement of liquid pressure above a specific point. Definition of head and pressure headis the height given by the pump to the fluid and it is measured in meters of liquid column m l c or simply indicated in meters m. Head is useful because it evaluates a pump s capacity to do a job. While some pump manufacturers that use pressure differential pressure which is measure the deviation between suction and discharge flange head to characterize their pumps this is not the most accurate way to do so because of friction and loss along the pipe line.

I don t need 70 feet of head. It is the measure of the potential of fluid at the measurement point. Different fluids with different specific gravities are all lifted at the same height. The pressure psi of a water pump operating with head 120 ft can be calculated with eq.