The Beginner’s Guide to Progressive Cavity Pump
The pumping of fluids is almost universal in chemical and petrochemical processes. The wide range of materials being handled requires close regard for the choice of materials for the development of the different pump parts, shaft sealing, and the power through the pressure of the individual issues. A wide variety of pump types have been created to fulfil the numerous unique circumstances found in chemical plant systems; nonetheless, since these can’t be talked about here, the exclusion of certain doesn’t imply that they may not be appropriate for service. As a rule, the final pump selection and performance details are prescribed by the producers to meet the circumstances indicated by the process designer engineer.
What is a Progressive Cavity Pump?
A progressive cavity pump is also known as progressing cavity pump, eccentric screw pump, and cavity pump. Via a pump, it transfers fluids progressively. The fluid passes through a series of small cavities while the rotor is turning. As the rotor continues to turn, the cavities progress from suction to the discharge end of the progressive cavity pump carrying the fluid. The activity allows for precise control of the progression of liquids in such a manner that will ensure that the stream is predictable and consistent, thusly extremely simple to make do.
Applications
These pumps are utilized in various applications that must have precise estimations of the volumetric stream: oil pumps, water pumps, drilling for oil, drilling for flammable gas, food and drink pumping, slurry pumping, and stormflow screening.
Selection Process
➮ The more you are familiar with the liquid, the better you can match pump size, working speed, and material for a cost-effective and dependable application.
➮ As a guideline, the PC pump is a proficient determination when the pressure required is higher than the stream rate (PSI > GPM).
➮ Wear is relative to speed, more so in a PC siphon than in a centrifugal pump. As the consistency of the liquid expands, you ought to diminish the speed of the pump.
➮ The higher the grating properties of the liquid the better to choose a larger pump and run it more slowly than a more modest and quicker siphon.
➮ For further developed wear resistance, picked a plan to keep the direct liquid speed under seven feet each second, however, understand that solids can drop out of suspension at speeds under four feet each second.
Advantages of Progressive Cavity Pump
➮ Good for solids handling and can also handle air-entrained, multiphase, and abrasive liquids
➮ Excellent choice for high viscosity applications
➮ Offer low net positive suction head required
➮ Excellent self-primer pump
➮ Do not vapor lock
➮ Offer high accuracy as a metering pump
➮ Can be operated vertically
➮ Quiet operation
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