Introduction of Different Type of Pumps

Positive Displacement Pumps :

Rotary Gear Pump :

A rotary gear pump is a positive displacement pump which employs a rotor and idler gear assembly to generate its flow. As the rotor gear drives the idler gear, the space caused by the crescent offsetting the gears and the meshing of the gear teeth displace the fluid, expelling it to the discharge port.

Rotary Screw Pump :

A screw pump is a type of rotary pump which is equipped with screws that mesh together and rotate within a cylindrical cavity or liner. The fluid enters from the suction side of the pump and moves linearly along these inter-meshing screws to the discharge side of the pump.

Rotary Vane Pump :

A rotary vane pump is a positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In some cases these vanes can have variable length and/or be tensioned to maintain contact with the walls as the pump rotates.

Reciprocating Plunger Pump :

Plunger pumps are reciprocating pumps that use a plunger to move media through a cylindrical chamber. The plunger is actuated by a steam powered, pneumatic, hydraulic, or electric drive.

Reciprocating Piston Pump :

Piston pumps are reciprocating pumps that use a piston to move media through a cylindrical chamber. The piston is actuated by a steam powered, pneumatic, hydraulic, or electric drive.

Reciprocating Diaphragm Pump :

A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or Teflon diaphragm and suitable valves on either side of the diaphragm (check valve, butterfly valves, flap valves, or any other form of shut-off valves) to pump a fluid.

Reciprocating Circumferential Piston Pump :

A Circumferential Piston pump (CPP) is a type of positive displacement rotary pump operating on a pumping principle that has been proven over many decades. As the pump rotary motion engages, the rotors mesh and unmesh to cause a partial vacuum at the suction port and generate pressure at the discharge or outlet port.

Linear Rope Pump :

A rope pump is a kind of pump where a loose hanging rope is lowered into a well and drawn up through a long pipe with the bottom immersed in water. It is commonly used in developing countries for both community supply and self-supply of water and can be installed on boreholes or hand-dug wells.

Linear Chain Pump :

The chain pump is type of a water pump in which several circular discs are positioned on an endless chain. One part of the chain dips into the water, and the chain runs through a tube, slightly bigger than the diameter of the discs.

Rotodynamic Pumps :

Centrifugal Pumps :

1. According to the types of stages:

Single stage pump:

It is known as single impeller pump.
It is simple in design and easy in maintenance.
It is ideal for large flow rates and low pressure installations.

Two stage pump:

It has two impellers operating side by side.
It is used for medium use applications.

Multistage Pump:

It has three or more impellers in series.
They are used for high head applications.

2. According to the type of case – split:

Axial split:

In these types of pumps the volute casing is split axially and split line at which the pump casing separates is at the shaft’s center – line.
They are typically mounted horizontally due to ease in installation and maintenance.

Radial split:

In it pump case is split radially, the volute casing split is perpendicular to shaft center line.

3. According to the types of impeller design.

Single suction:

It has single suction impeller which allows fluid to enter blades only through a single opening.
It has a simple design but the impeller has higher axial thrust imbalance due to flow coming through one side of impeller.