Things To Know About The Easy Usability Of Progressive Cavity Pumps

By Author: Jim Lee
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Whenever it comes to a pump that is known for its superb performance, easy maintenance and amazing durability, the name of eccentric screw pump is taken. To explain it in simple terms it is a type of positive displacement pump. It was invented in the 1930s by Rene Moineau, a French engineer. This kind of pump consists of a helical metallic rotor. This rotor keeps rotating inside an elastic helical stator. The rotor is fashioned from hardened steel and is often referred to as the precision detector of the pump by engineers. It must be mentioned here that the elastometer is not only abrasion resistant but also injection molded. The main thing that is kept in mind while designing the pump is that the elastometer is compatible with the liquid being pumped.


The eccentric screw pumps are also known as helical rotor pumps, progressive cavity pumps or mono pumps. The manufacturers of these kinds of pumps also specialize in the designing of drum pumps and mag drive pumps. There is a reason why these pumps are also known as progressive cavity ...
... pumps. The geometry and especially the dimensions of the stator and elastometer are designed in such a way that a double string of sealed chambers, otherwise known as cavities are produced as soon as the rotor starts turning inside the stator. The chambers start to move axially from one part to another of the pump. That is to say that they move from the suction port to the discharge port of the machine, all the while carrying the fluid with them. If one requires the pressure to be more for the purpose of transferring more quantity of fluid within a given time, they would require having a bigger pump in order to ensure that the required amount of pressure is maintained. As far as the type of fluid is concerned, this pump allows the user much more flexibility than other kinds of pumps. You can transport viscous, abrasive, heterogeneous, shear-sensitive and frothing fluids from one place to another with the help of this pump.
In comparison with drum pumps, the benefits of using eccentric screw pumps can be easily categorized:


High suction lift capabilities

Self-priming

Constant non-pulsating flow

Volumetric accuracy

High efficiency

Excellent pressure stability

Easy treatment of high viscosity and abrasive fluids

Capability to transport multiphase fluids

Conservation of product reliability

Simple design

Valve-less operation

Reversible flow direction

Hardly any other pump offers a user so much flexibility and usability. That is why helical rotor pumps are used for a variety of purposes. In the field of abattoir, it is used for making minced meat, blood, bones, meat purees, thick non flowing paste, and chicken offal. The construction industry uses it for making mortar, coat, cement, and concrete; while the beverage industry uses it for making fruit juice, pulp, liquors, beer, fruit paste, etc. However, its biggest use is perhaps done in the chemical and petrochemical industry where it produces everything from resin, reagent, caustic soda, acids, crude oil, sludge, biodiesel, shear sensitive latex emulsion, chemicals, condensate, pharmaceutical filter cake, polyelectrolyte, etc.