Category Archives: Pumps

A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action.  They can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps.

Also, A pump operates by some mechanism (typically reciprocating or rotary), and consume energy to perform mechanical work by moving the fluid.

Finally, mechanical pumps serve in a wide range of applications such as pumping. SRS International Direct Pumps comes in different types from Centrifugal, Gear Type, Positive Displacement, Air Diaphragm, Lobe and Vacuum liquid ring types.

A Centrifugal Pump

Centrifugal pumps are a sub-class of dynamic axisymmetric work-absorbing turbomachinery.  Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow.

Also, the rotational energy typically comes from an engine or electric motor. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits.

A Centrifugal pump are commonly used to include water, sewage, petroleum and petrochemical pumping; a centrifugal fan is commonly used to implement a vacuum cleaner.

The reverse function of the centrifugal pump is a water turbine converting potential energy of water pressure into mechanical rotational energy.

Gear Pumps

A gear pump uses the meshing of gears to pump fluid by displacement. They are one of the most common types of pumps for hydraulic fluid power applications.

In addition, a rotary Gear pump are also widely used in chemical transfer pump installations to pump high viscosity fluids.  There are two main variations; external gear pump which use two external spur gears, and internal gear pumps.  They use an external and an internal spur gears (internal spur gear teeth face inwards, see below).

They are positive displacement (or fixed displacement), meaning they pump a constant amount of fluid for each revolution. Some gear pump are designed to function as either a motor or a pump.

Lobe Pumps

They are used in a variety of industries including pulp and paper, chemical, food, beverage, pharmaceutical, and biotechnology.  They are popular in these diverse industries because of what they have to offer.  They offer superb sanitary qualities, high efficiency, reliability, corrosion resistance and good clean-in-place and steam-in-place (CIP/SIP) characteristics.

Also a Rotary pump can handle solids (e.g., cherries and olives), slurries, pastes, and a variety of liquids. If wetted, they offer self-priming performance. A gentle pumping action minimizes product degradation.

They also offer continuous and intermittent reversible flows and can operate dry for brief periods of time.  Flow is relatively independent of changes in process pressure, too, so output is relatively constant and continuous.

Vacuum Pump

It is a device that removes gas molecules from a sealed volume in order to leave behind a partial vacuum

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