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Where Are Positive Displacement Pumps Used?

Centrifugal, reciprocating, and rotary positive displacement pumps are the three primary families into which pumps are divided. The choice of pump technology for a given application is influenced by several factors, including the needed duty point, temperature, abrasiveness, viscosity, and kind of liquid.

An introduction to rotary pumps and reciprocating positive displacement pumps, or PD pumps, will be given in this blog.


What Are Positive Displacement Pumps? Pump with Positive Displacement

Pumps with positive displacement (PD) are made to guarantee that all pumping motion is forward-moving (positive). Its internal construction guarantees that fluid cannot circulate inside its casing or back toward the pump inlet.

Positive displacement (PD) pumps come in both rotary and reciprocating designs. with various internal components and designs to handle a range of fluid properties.

Because of the way they are made, reciprocating and rotary pumps share several design concepts.

The following qualities apply to these designs:

  • A constant amount of fluid moved each revolution.
  • Pressure doesn't change.
  • Speed and flow are proportionate.

Positive displacement pumps: How Do They Operate?

More than ten distinct varieties of positive displacement pumps exist. In the simplest terms possible, PD pumps work by drawing fluid into a cavity or chamber by producing a vacuum.

The fluid inside the pump head experiences a rise in pressure when the chamber is filled and the pump cycles. As a result, it is released into the pipes through the discharge port.

Applications of Positive Displacement Pumps

Because of their adaptability and variety in design, these designs are utilized in a wide range of applications.

Typical uses for them include the following:

Unloading and loading tankers Fuel Transfer Filling

Mostly fuels, but also chemicals, food ingredients, oils, and other liquids with viscosities ranging from sludges to thicker than water.

Tankers can be stripped (fully emptied) with the use of positive displacement pumps, and dry-run designs prevent pump damage. They are excellent at priming and make a guarantee that, unlike centrifugal designs, siphoning doesn't happen when the pump is stopped.

Dosing, Metering, and Sampling

Any pump used must deliver a certain volume per revolution to ensure precise, repetitive fluid delivery into a process. This eliminates centrifugal systems in which the fluid flow may fluctuate or recirculate inside the pump head.

The fluids utilized in these processes can vary depending on the application, however, they can include chemicals, flavourings, fuel, dyes, paint, flocculants, and coagulants in wastewater treatment. Because of its accuracy, PD Pumps are known to enable dosage accuracy of greater than 99%. 

Knowing When to Use a Positive Displacement Pump for Your Needs

Are you having trouble deciding if a positive displacement pump is the right choice for your application?

Since there are so many different kinds, designs, uses, and liquids, it is always best to contact Risansi. It is one of the leading positive displacement pump companies in India. Contact the knowledgeable engineers by phone, email, or live chat.

Within minutes after discussing your method, application, and intended result, we can frequently recommend a pump type. 

Ask for a callback.

 

  

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