Types of Pumps Used for Sprayers

Pest control holding a sprayer pump

A sprayer is one of the critical implements in most farming, landscaping, manufacturing and commercial ventures. A lot of consideration hence goes into choosing the right sprayer.

The parts of your sprayer are among the aspects on which you should base your sprayer choice. The pump is the heart of your sprayer’s operation. It determines your sprayer’s output and the flow of the sprayer’s material and consequently the success of your spraying.

The sprayer pump options available among spray tanks for sale are selected and classified according to their engineering, power source, fluid flow rates, and gasket material. Most pumps manufacturers also add a chemical corrosion protection layer to enhance their pump’s durability.

Here are the sprayer pump options for different applications.

Centrifugal Pumps

These employ a fast circular motion on their impellers to push out the contents of your spray tank. They are the most commonly used non-positive displacement pumps across most industries. Centrifugal pumps have flow outputs of 25–1400 GPM and nozzle delivery pressures of approximately 150 PSI.

They can be powered by electricity or gasoline and are made of cast iron, polyethylene, polypropylene or stainless steel. Centrifugal pumps are versatile, durable and have a simple design.

Diaphragm Pumps

These separate the sensitive parts of the pump from the abrasive or corrosive solutions you will spray. As such they are among the most durable sprayer pumps. Diaphragm pumps are self-priming and have flow capacities of 0.6–68.7 GPM and pressures of 725 PSI.

They can be powered by gasoline, air or electricity. Polyethylene, polypropylene, and aluminum are some of the most common materials used to make diaphragm pumps.

Roller Pumps

These have simple engineering and maintenance and versatility. The pumps have internal rollers that revolve to generate a positive pressure differential, which causes fluid flow.

Roller pumps have a 9.1–62 GPM and generate pressures of 300PSI at most. These self-priming pumps are made of silver-cast or cast iron and are powered with electricity or gasoline.

Transfer Pumps

Worker inspecting a pump systemThese have large inlet and outlet diameters. They are hence often used for spraying semi-solids, high volume fluids, and liquids with suspended solutions such as that in waste and trash operations.

Transfer pumps can be made of polypropylene, aluminium or cast iron and powered by a pedestal, electricity or gasoline. They are the best choice for people who move a lot during their spraying operation.

Piston Pumps

These have a piston pump that forces a spray fluid through a sprayer’s supply lines and out of its nozzle. The fluid’s contact head in a piston pump is often made of a chemical-resistant material, such as polyethylene or nitrile.

A piston pump, unlike others, requires priming. It comprises cast iron and has flow rates of 10.2–68.4 GPM and pressures of 120PSI at most. Piston pumps are mostly used for large-distance spraying applications.

These pumps are generally the most expensive part of your sprayer. As such, their optimal maintenance is essential regardless of the type. The exact maintenance needs for your pump depend on the pumps’ manufacturer. Discuss with your supplier what maintenance your pump requires beforehand.