What is Pump and Types?

A pump is a device used to increase a fluid's pressure energy. A liquid pump generally lifts a liquid from a lower level to a higher level. So pumps do some work on the fluid, and to do the work, energy is supplied from an external source. That is the pump is required to be driven by an electric motor.

Types of Pumps

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Pumps are classified as follows or pumps are two types (i) Positive displacement Pump (ii) Dynamic Pressure Pump.

Also Read: Centrifugal Pump Construction, Working, Advantages, and Disadvantages

(i) Positive displacement Pump 

A positive displacement pump has an expanding fluids cavity on the suction side of the pump, and a shrinking fluids cavity on the discharge side of the pump. The pumped fluids flow Inlet the hole as the suction side expands and the outlet as the discharge cavity contracts.

It is divided into the following subcategories 

What is Pump and Types?

(a) Reciprocating Pump 

Positive displacement in the reciprocating pump is done by moving its piston back and forth or up and down. It is classified as

(i) Piston Pump (ii) Plunger Pump (iii) Diaphragm Pump

(b) Rotary Pump

Positive displacement in a rotary pump is achieved by its friction motion. It is classified as follows.

(i) Gear Pump (ii) Mano Pump 

(ii) Dynamic Pressure Pump 

The pressure of the fluid is obtained by this pump by its motion. these are two types

(a) Centrifuged Pump

In a centrifugal pump, the lifting column of liquid is obtained by centrifugal force. It is classified as follows.

(i) Valute Pump (ii) Turbine Pump

(b) Propeller Pump 

In Propeller Pump, the lifting column of the liquid is obtained by the vane of the propeller. The propeller pump is the opposite of the coupling pump. 

Also Read: Reciprocating Pump Working, Construction, and Uses

How do Calculate the horsepower of a Pump?

Finding horsepower of pump: Considered for a reciprocating pump.

Hs = suction head of the pump 

Hd = delivery head of a pump 

dt = discharge received from the pump 

W = volume density of liquid

Then the work done by the pump (per minute) = wф(Hs + Hd) kgm/mm

Hours Power of Pump = W ф(Hs + Hd)/4500


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