The working principles of Peripheral Pump

A peripheral pump, also known as a regenerative pump or turbo pump, operates based on the principle of centrifugal force but with a unique design that allows it to handle small flows at high heads (pressure). Here's how it works:

1. Basic Construction

A peripheral pump typically consists of:

Impeller with radial vanes: Positioned inside a circular casing.

Casing: Contains a ring of peripheral channels or cells around the impeller.

Inlet and outlet ports: For fluid entry and exit.

2. Working Mechanism

Step-by-step Process:

Fluid Enters the Pump:

Fluid enters the pump through the inlet (suction side).

The impeller, rotating at high speed, captures the fluid.

Impeller Action:

As the impeller spins, its vanes push the fluid into the peripheral cells around the impeller.

The fluid travels in a spiral path due to the impeller's rotation and peripheral channel design.

Energy Transfer (Regeneration):

The fluid repeatedly circulates between the impeller vanes and the peripheral channels.

This repeated contact adds energy to the fluid each time (regenerative action), increasing the pressure.

Fluid Exit:

The now high-pressure fluid exits through the outlet.

3. Key Characteristics

High head, low flow: Suitable for applications requiring high pressure but not large volumes of fluid.

Self-priming (partially): Can handle small amounts of air or vapor in the fluid.

Smooth flow: Due to continuous energy transfer.

Compact design: Useful for small systems.

4. Applications

Boiler feed water systems

Water circulation in cooling systems

Chemical and pharmaceutical fluid transfer

Domestic and industrial water supply

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