Progressive Cavity Pumps
Progressive Cavity Pumps
(OP)
hello every one
I am currently working on centrifugal pumps for fresh water pumps for a supplier. I have got an interview call from a progressive cavity pump manufacturer for an interview. can you please help me on the basic knowledge of these pumps
1. what are progressive cavity pumps?
2. where and under what conditions are they used?
3. what are the key information to be known on these pumps??
can I convince the manufacturer with my experience with centrifugal pumps
please help me if there is any study material available on it
regards
I am currently working on centrifugal pumps for fresh water pumps for a supplier. I have got an interview call from a progressive cavity pump manufacturer for an interview. can you please help me on the basic knowledge of these pumps
1. what are progressive cavity pumps?
2. where and under what conditions are they used?
3. what are the key information to be known on these pumps??
can I convince the manufacturer with my experience with centrifugal pumps
please help me if there is any study material available on it
regards





RE: Progressive Cavity Pumps
They are normally used for liquids with significant solids particles and can take some large stones / rocks etc with the liquid.
Kind of limited in head and power, but are good if you want to pump out drains, ditches, sumps etc where you have all manner of things in the water / liquid.
They tend to be really quite long (3-4m is not unusual).
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Progressive Cavity Pumps
Used a lot for sludges and similar services, also smaller ones can be used for fairly precise dosing/metering applications. Typically, the speed will be kept to 300 rpm or less, usually driven by a gearmotor or a belt drive.
Can be good for pumping shear-sensitive liquids as well.
RE: Progressive Cavity Pumps
All types of materials are available for rotor and stator, so most any type of corrosive chemical can be pumped as well. Very high pressures can be achieved with metallic rotor AND stator; one of the original services for this pump was as a fuel pump in airplane engines.
NOV, the oilfield equipment co., uses the English version (Mono) as an artificial lift pump by putting a PC pump on bottom of sucker rods and spinning the rods, doing away with the up and down pumping action of sucker rods. A very clever application to replace reciprocation with rotation; saving on infrastructure and maintenance costs.
This is a niche pump. When a PC pump is very well suited to an application, it is usually because nothing else will work. Anytime a centrifugal can also perform the service well; my experience says use the centrifugal.
Go look at Robbins&Meyers site for info on Moyno Pumps which are the biggest selling by far.
RE: Progressive Cavity Pumps
RE: Progressive Cavity Pumps
In the plants we build, we use centrifugal slurry pumps for everything we can, and pc pumps where the solids content is to high for centrifugal and when more control over volume flow is necessary.
From an employment/interview perspective, sides the technical knowledge and understanding of the pumps, the applications willdiffer vastly, with pc used in process, waste and food industries and practically never for freshwater. If you need understanding of the applications for your new position (as you will in sales), try to look into that too.
RE: Progressive Cavity Pumps
Thanks you very very much for your support and guidance
The above provided information was very very helpful
regards