?What is Peripheral Pump

Peripheral pumps are a type of centrifugal pump used often in household situations and in industry. They are also known as regenerative pumps or side channel pumps. So, what is a peripheral pump and what is it used for?

 

What is Peripheral Pump?

 

Peripheral pumps have an impeller that rotates in the concentric casing channel with an inlet and an outlet. A stripper between the inlet and outlet prevents a hydraulic short circuit from happening between the high pressure and the low side of the channel.

 

In a peripheral pump, the liquid or water in the pump circulates between the impeller and the casing channel repeatedly, the energy transferred is extremely high. The input power of this type of pump decreases with an increasing flow rate.

 

Peripheral pumps often a high number of smaller double flow radial vanes at its periphery, hence the name of the pump. They are usually quite small pumps and so they are used in small scale applications.

 

How is a Peripheral Pump different from a standard Centrifugal Pump?

 

A peripheral pump is a type of centrifugal pump, but it differs from a standard centrifugal pump because the water or fluid is pumped into a ‘peripheral’ channel around the casing. A centrifugal pump is often much larger in size than a peripheral pump.

 

Self Priming Peripheral Pumps

 

Peripheral pumps are often self-priming. A pump is self-priming if the pump is below the level of liquid to be pumped and gravity and air pressure make sure that it is constantly automatically filled.

 

If they are not self-priming then peripheral pump will need priming before use.

 

What are Peripheral Pumps made out of?

 

Peripheral pumps can be made of out of stainless steel or other non-ferrous materials. Parts may be made with cast iron and brass.

 

Advantages and disadvantages of Peripheral Pump

 

• Can handle gas entrained fluids without a risk of cavitation
• Low NPSH requirements
• Low flow rates at high pressure
• Operates like a gear pump but without the risks and maintenance that come with using gears

 

The downside to peripheral pumps is that they can be less efficient that most radial pumps. However, the biggest disadvantage is that peripheral pumps use rotation rather than suction to move the liquid, therefore have low or almost no suction power. This means that it may need to be put under water, or primed, before it will move water which can be an inconvenience.

 

What are Peripheral pumps used for?

 

Because they are small scale, peripheral pumps work well in domestic situations such as fountains, jet washes and water filtration. They are well suited to pumping liquids that are not contaminated, for example boiler feed pumps. You might also find peripheral pumps as pressure boosters, car wash pumps,

 

Peripheral pumps are the most popular type of pump that is used in reservoir type hydro-electric power stations. They can also act as a turbine to deliver power, which is why they are sometimes called turbine pumps. These kind of peripheral pumps swirl the water at very high speeds.

 

How does Linquip help industrial Pump Service Providers?

 

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