All Types of Pumps

The automatic pump belongs to a class of technology that has made many everyday tasks much easier. Simply described as a machination that raises or transfers fluids, industrial and civil applications include: drainage, sewage, irrigation, chemical, petroleum, medical, and industrial mill. Though several subcategories exist, there are really only two basic types of pumps: Dynamic and Positive-Displacement.

These are known as Dynamic Pumps and Positive-Displacement Pumps. High liquid velocity that is converted into pressure while inside a passage that diffuses flow is characteristic of Dynamic pumps. Less efficient than the latter category, they are easier to maintain and run at higher velocities, especially when involved with electric motors and steam turbines.

There are two distinctive subcategories of Dynamic Pumps: Axial, and Centrifugal. Known commonly as propeller pumps, Axial Pumps lift liquid from the pressure caused by the rotation of their vanes, mimicking copter blades or outboard motors.

As the impeller rotates it pulls liquid into its housing through centrifugal force which helps to decrease the rate of speed at which the fluid exits the impeller chamber. The velocity at which it does is then converted into the pressure necessary for discharge.

Centrifugal Pumps, on the other hand, are made up of an impeller and an intake system. Apparently the most popular, occupying eighty percent of the world's pump production, Centrifugal Pumps can efficiently filter large amounts of liquid for a relatively low cost. They work by turning their vanes which pull the liquid into the chamber, and the transforming the velocity into the pressure required to push it out through the expulsion channel, a bit like an outboard motor.

There are four types of pumps that categorize Positive-Displacement pumps: Rotary, Reciprocating, Metering, and Moyno Pumps. Specifically geared towards smooth liquids, Rotary Pumps are simple in design and are not directly influenced by pressure changes.

Moyno pumps serve a very specific function so, accordingly, are rare in most cases. These are designed to transfer solids exclusively, and because they feature a smooth tumbling process, are ideal for sensitive solids that would usually retain damage during their processing.

Reciprocating pumps process an exact amount of liquid by pulling it through the intake valve, into the cylinder, and out using positive pressure. They are perfect for use with slurry or sledge jobs. Finally, the Rotary variety is strictly design for smooth, non-viscous liquids. They are simple and do not necessarily experience any consequences from moderate pressure changes. Iterations of this category are lobular, vane, cam-and-piston, screw, and internal-gear.