Pumps AXIAL PUMP AXIAL PUMP Transfers fluid in
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Pumps
AXIAL PUMP
AXIAL 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: Terms: AD VE 100 TD • VE – volumetric efficiency • AD – actual displacement • TD – theoretical displacement
PUMP SPECIFICATIONS (cont’d. ) Delivery: Terms: • D – displacement • MS – motor speed
Pump Specifications (cont’d. ) Power is the equivalent of how much work is produced in a certain amount of time Terms: • W: distance a weight moves • T: 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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