# How Do You Select A Pump?

## How do I know what size irrigation pump I need?

End users should determine the amount of water to be applied during the peak period by multiplying the size of the field by the amount of water in inches that must be applied.

The result is then converted to gallons per minute (gpm), and this number determines the size of the pump..

## What is pump head calculation?

Total Dynamic Head in an industrial pumping system is the total amount of pressure when water is flowing in a system. It is comprised of two parts: the vertical rise and friction loss. It is important to calculate this accurately in order to determine the correct sizing and scale of pumping equipment for your needs.

## How do I select a motor for an application?

Consider an application’s purpose and which current it uses to select the appropriate type of motor. An application’s specifications such as voltage, current, torque, and velocity will determine which motor is most appropriate so be sure to pay attention to its requirements.

## How many gallons per minute does a 1 hp pump?

Number of submersible well pump stages determine pump lift capacityTable of Submersible Pump Stages vs HP vs Total Dynamic Head vs. GPM Flow Rate CapacityWater Pump HPNr. of Pump StagesGPM Flow Rate Capacity1 HP84 – 40 GPM (varies by TDH)1 1/2 HP114 – 40 GPM (varies by TDH)2 HP144 – 42 GPM (varies by TDH)2 more rows

## How much horsepower do you need to pump water?

Example – Horsepower Required to Pump WaterPower Required to Pump Water (hp)Volume Flow (gpm)Height (ft)50.006310.0442100.01260.0884150.01890.13313 more rows

## How many feet can a pump pull water?

30 feetIn a water well, the weight of the atmosphere is acting on the surface of the water down in the well. The pump at ground level acts as the source of vacuum and has a theoretical lifting capability of about 30 feet (It would lift 34 feet if it could create a perfect vacuum).

## What is pump capacity?

Pump capacity is a term used to define the flow rate through a pump at its designed conditions. It describes the volume of liquid that is allowed to travel through the pump in a given time. … Some of the most common units of pump capacity are: Gallons per minute (gpm) Liters/minute (L/min)

## How is a pump selected?

The theoretical and factual flow rate ratio is expressed by volumetric efficiency quantity: … In the majority of cases a pump is selected for the particular pipeline system and flow rate value is set in advance. Head – energy imparted by pump to the pumped medium and attributed to unit of pumped medium mass.

## How do you determine what size pump you need?

Larger capacity pumps are rated by horsepower (HP). To determine the size pond pump, first you need to calculate the volume of water in the pond. To calculate the volume of water in gallons, simply multiply the length x width x average depth x 7.5.

## How do you select a curve from a pump?

Look at the left side of the curve and you will see a label HEAD – FT and numbers starting with 0 and increasing as you move up the chart. This is the pressure that the pump is capable of producing, measured in feet of head (not PSI!) The bottom of the curve is labeled US GPM. This is the flow that the pump produces.

## How do you select a pump and a motor?

The power required to drive the pump at the rated design condition should always be less than the nameplate horsepower rating of the motor. So if the pump will require 4.5 HP at the design condition, at a minimum, the motor should be sized for 5 HP – the next nominal size above 4.5 HP.

## What does it mean when a pump is cavitating?

Cavitation in pumps is the rapid creation and subsequent collapse of air bubbles in a fluid. … In many cases, the force of cavitation is strong enough to pit metal components of the pump, like the impeller, and damage pump seals.