Pumps

AXIAL PUMPAXIAL PUMP

AXIAL PUMPAXIAL PUMP Transfers fluid in a straight line A common example of an Axial pump is a boat motor The driveshaft extends through the elbow and into the process flow. They can be mounted vertically or horizontally

PUMP SPECIFICATIONS Displacement The amount of fluid that can be discharged from the pump in one revolution Expressed in cubic inches per revolution or cubic centimeters per revolution Two types of displacement Theoretical Actual

PUMP SPECIFICATIONS (cont’d.) Volumetric efficiency:  AD  VE  100  TD  TD   Terms: VE – volumetric efficiency AD – actual displacement TD – theoretical displacement

PUMP SPECIFICATIONS (cont’d.) Delivery : Terms : D – displacement MS – motor speed

Pump Specifications (cont’d.) Terms: W: distance a weight moves T: time Power is the equivalent of how much work is produced in a certain amount of time

PUMP SPECIFICATIONS (cont’d.) Horsepower is a unit of power in the English system of units One horsepower (hp) is equal to 33,000 foot-pounds (ft.- lb.) per minute, or 550 ft.-lb. per second

Pump Troubleshooting Bearing failure is most common with the gear-type pumps Seals will sometimes begin to leak Fluid reservoir must be checked on a regular basis Otherwise the pump may begin to suck in air

PUMP TROUBLESHOOTING (cont’d.) Entrained air Air bubbles can form and be carried along with the fluid stream Can cause cavitation Cavitation: vacuum void within the fluid

Pump Troubleshooting (cont’d.) Vane pumps Vanes, cam ring and housing tend to wear out over time Most pumps have an inlet strainer Can become clogged

Pumps in Series

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