Pumps_v1.01 whith the valve functions.pptx

Pumps description 101_Eso111

1. BASICS OF PUMP

2. What is Pump? A pump is a mechanical device which converts prime mover energy to mechanical energy and then into hydraulic energy (fluid flow and pressure energy) to move the fluid from one position to another. Pump operates by creating a difference in pressure that drives the fluid through a system of pipes or hoses.

3. Pump Classification Positive Displacement Pump Kinetic Pump Reciprocating Rotary Centrifugal Regenerative Turbine Piston Plunger Diaphragm Peristaltic Gear Lobe Vane Screw Axial Mixed Radial

4. Positive Displacement Pumps Definite volume of Liquid is trapped in a chamber ,which is alternatively filled from inlet and emptied at higher pressure outlet. Reciprocating Pumps Rotary Pumps The chamber is stationary cylinder that contains a piston or plunger. Reciprocating pumps are further of different types as piston, Plunger and diaphragm type The Chamber moves from inlet to outlet and back to discharge

5. Centrifugal Pumps Mechanical energy gets converted into pressure energy by the centrifugal action . Liquid enters through the suction connection about the axis of impeller into the eye of the pump and further flows outwards in space between vanes . Liquid that leaves the periphery of the impeller is collected in volute(spiral casing) and leaves through a tangential discharge section.

6. Characterstics Positive Displacement Centrifugal Flow Rate Low High Pressure rise High Low Self Priming Yes No Viscosity of Fluid High Low Energy addition to fluid Continously Intermediate

7. Energy is required to draw fluid from reservoir and discharge a constant volumetric flow rate at the exit of pipeline. Developed Head

8. NPSH and Cavitation

9. Centrifugal Pumps Type of Flow Sealing Method Suction Type No of impeller Impeller type Casing Priming Axial Radial Mixed Single Double Single Multiple open Semi-Closed Closed Volute Vortex

10. Pumping System