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A Simple Guide to Pumps: Part 1

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April 13, 2016 By Mike Hurlbatt

We get a lot of questions about pumps. What kind of pump is right for the job? What is the difference between kinds of pumps? How do water pumps work? We’re going to give you a simple guide to some of the pumps we offer throughout Australia, and hope we can make your choices easier. If it doesn’t work, you can always feel free to call us or email us; we will be happy to recommend the right pump for the right job.

Vacuum Pumps

A vacuum pump works just like a shop-vac. It removes air to create a vacuum. This causes lower pressure in the space where the air was removed, and allows the higher-pressure air to rush in and fill the space created when the air was removed. The most popular vacuum pump is a positive displacement pump. Vacuum pumps are used more for applications that don’t involve water, but are sometimes used in sewage systems.

Centrifugal Pumps

A centrifugal pump moves water by converting rotational kinetic energy into hydro dynamics energy. The energy comes from a motor, and water enters an impeller, where it is accelerated to move outward through the pump to either a diffuser or a volute chamber, where it then leaves the pump. Centrifugal pumps are best used for water, but are often used for sewage, chemicals, slurries etc.

Rotary Vane Pumps

A rotary vane pump is classified as a positive-displacement pump. It has vanes which are mounted to a rotor inside of a cavity. The simple type has a circular rotor which rotates inside of a circular cavity. The centres are slightly offset, causing what is known as eccentricity. To make a long story short, they are often used for holding wood or other materials down on CNC Routers in the furniture industry.

Double Diaphragm Pumps

A double diaphragm pump, also known as an AODD, is classified as a positive displacement pump that uses two diaphragms made of thermoplastic, Teflon, or rubber, which work with a reciprocating action. They can be up to 97% efficient, are self-priming, and can handle viscous fluids. They can also handle solids and corrosive liquids. Most uses for this pump are industrial, but they are also used on the filters for fish tanks. Another interesting use is artificial hearts.

Filed Under: Blog Posts, Centrifugal Pumps, Vacuum Pumps Tagged With: centrifugal pump, pump, vacuum pump

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