High Efficiency!

Low Cost and Long Life
Simple Operation and Maintenance

Mingjie Pump is a professional large-flow, high pressure, high viscosity and accurately measured progressive cavity pump manufacturer and supplier.

Friendly Reminder

Please provide the physical and chemical properties of the medium you are transporting before selecting the model. At the same time, specific flow, head or pressure also need to be provided. So that we can choose the model and quotation for you faster.

Pump TypePressure Range (bar)Capacity Range (m³/h)Speed Range (rpm)Inlet Size (G/DN)Outlet Size (G/DN)Motor Power (KW)
Mingjie Progressive cavity Pump Parameter Table

Some famous progressive cavity pump manufacturers

  • Seepex, Inc. — Brand: Seepex pump (Country: American)
  • Erich NETZSCH GmbH & Co. Holding KG — Brand: Netzsch pump (Country: Germany)
  • Moyno In — Brand: Moyno pump (Country: Germany)
  • NOV Process & Flow Technologies UK Limited — Brand: Mono pump (Country: UK)
  • MXQ, LLC. — Brand: MXQ pump (Country: USA)
  • ITT Bornemann GmbH — Brand: Bornemann pump (Country: Germany)
  • PCM Group UK Ltd — Brand: PCM pump (Country: French)
  • Allweiler Group GmbH — Brand: Allweiler pump (Country: Germany)
  • 兵神装備株式会社 / HEISHIN Ltd. — Heishin pump (Country: Japan)
  • ROTO PUMPS LTD. — Roto pumps (Country: India)
Lern more about pc pump manufactureres

We can provide after-sales replacement spare parts and complete pump repair services for these pump manufacturers.

Transport Characteristics

Flow rate and pressure are depending on pump size, geometry and stages of the conveying elements and have to be defined depending on medium and application.


  • Direction of rotation and flow can be reversed
  • Good self-priming and suction properties
  • Stable medium transportation
  •  Simple and compact structure
  • Installation in any orientation possible
  • Light weight and high efficiency
  • High speed working ability
  • Medium viscosity is not sensitive
  • Precise dosing
  • Easy operation and maintenance
  • Low turbulence of medium discharge
  • Reliable operation and long service life
  • Large free ball passage (up to 150 mm)
  • Weak pressure pulsation, small mechanical vibration, low noise
  • They are self-priming up to 28 feet of suction lift, based on water.

What is a

Progressive Cavity Pump ?

Progressive cavity pump is a type of positive displacement pump, which is a rotary positive displacement pump;

It was invented by the French engineer MoiNeau, and first produced by the French PCM Pump Company, so it is also called Mono pump, PC pump or PCM pump;

It has been officially named as single screw pump (单螺杆泵) or eccentric screw pump (偏心螺杆泵) in China;

It is mainly composed of a single-head spiral rotor (solid metal of different materials) and a double-head inner spiral stator (flexible rubber) (of course, our factory also has a double-head spiral rotor and a three-head inner spiral stator). Due to the irregular shape of the stator and the rotor, they mesh with each other to form a number of different sealed cavities, which separate the suction cavity and the discharge cavity, resulting in volume changes to achieve the purpose of liquid delivery; The stator and the rotor are interference fit, should not be run dry. The conveyed medium can act as a lubricant.

Because of its high process reliability and suction capability, it is usually used for continuous, gentle conveying and precise feeding;


Progressive Cavity Pumps Working Principle

The progressive cavity pump is a kind of internal meshing closed rotor positive displacement pump. Its main working parts are composed of an eccentric screw (rotor) and a fixed elastic bushing (stator).

Progressive Cavity Pumps Working Principle-Front view dynamic picture
Progressive Cavity Pumps Working Principle-Front view dynamic picture

The rotor is a screw with a large lead, a large tooth height and a small thread inner diameter, while the stator is an elastic bushing with a double-ended spiral.
Due to the special geometric shapes of the stator and the rotor, they will form several separate sealed cavities that are not connected to each other.
When the rotor is running in the stator, the sealed cavity moves in the axial direction from the suction end to the discharge end of the pump.

The medium is continuously and uniformly conveyed in the coaxial line from the suction side to the pressure side without changing the volume.

Structure Diagram

Progressive Cavity Pump Structure Diagram
Progressive Cavity Pump Structure Diagram
1Material-out chamberHT200, 1Cr18Ni9Ti, 304, 316L, 2205, Ti
2Rotor45#, 2Cr13, 304, 316L, 2205, Ti (Heat-treatable and electroplated Cr)
3StatorNR, NBR, Q, EPM, FKM
4Suction chamberHT200, 304, 316L, 2205, Ti
5Driving shaft45#, 2Cr13, 304, 316L, 2205, Ti (Heat-treatable and electroplated Cr)
6Gear motor/
7Base plate45#, 2Cr13, 304, 316L, 2205, Ti
8Coupling rod45#, 2Cr13, 304, 316L, 2205, Ti (Heat-treatable and electroplated Cr)
9Universal joint assemblyNBR + 45#, 2Cr13, 304, 316L
10Shaft sealingCustomized according to media
Progressive cavity pump parts material list


Chemical Industry

It mainly transports all kinds of inorganic acid, alkali, additive, suspension, sludge, etc.

Agricultural Transportation

Transport liquid fertilizer, pet liquid food, biological products, etc.

Paper Making and Wood Processing

Used to transport latex, lime slurry, cellulose, additives, starch, titanium dioxide, alum, water glass, soda, glue, etc.

Building and Mining

Used to transport concrete, bentonite, gravel, sand, lime and lime suspension etc.

Food Industry

Used to transport dough, palm oil, olive oil, ice cream, jam, honey, meat sauce, sausage, potato residue, caramel, soft candy, mustard, tomato sauce, pet food edc.

Petrochemical Industry

It mainly transports crude oil, lubricant, mineral oil, sludge, silt, water-oil emulsion, heavy oil, paraffin, etc.

Pharmaceutical and cosmetic industry

Ming Jie pump is used to deliver cream, additive, gel, shampoo, ointment, etc.

Wine and beverage industry

Used to transport beer, distiller’s grains, wort, yeast, jam, fruit juice, concentrated beverage, essence, additives, etc.

Sewage Treatment and Environmental Engineering

Transport primary sludge, thick sludge, dewatered sludge, electrolyte, waste gas treatment sewage, gypsum, etc.

Related Articles

Frequently Asked Question

The biggest characteristic of progressive cavity pump is that it is especially suitable for conveying sensitive liquids which cannot be sheared, squeezed or stirred, that is, non-Newtonian liquids which will show thixotropic properties when subjected to shearing. It is not only suitable for transporting medium with low viscosity such as water, but also especially suitable for transporting suspension containing solid particles or short fibers and medium with very high viscosity.

  1. Since the stator and the rotor are in an interference fit, they cannot be idling or dry running; The contact surface of the stator and the rotor usually needs a layer of fluid film to maintain lubrication.
  2. When the fluid with high viscosity and poor fluidity is input, we need to pay attention to whether it can flow into the pump fast enough. If it cannot, it will easily cause the dry grinding and volumetric efficiency of the pump to change. So we need to pay attention to the speed of the fluid being conveyed and its viscosity.
  3. For fluids with lower water content, the transport distance is shorter and higher pressure is required.
  4. In order to ensure the life of the progressive cavity pump, we usually control the speed to a low level so that a large flow will not be generated. If you need to increase the flow, usually add a variable frequency drive (VFD) or stepless speed reducer. Speed and flow are often proportional. But the maximum flow rate of the progressive cavity pump in our factory can reach: 300m³/h;
  5. The slip rate of low-viscosity fluid between the stator and the rotor is very high, which is likely to cause the efficiency of the pump to decrease.
  6. The possible high starting torque may require the driver (motor) to be larger than otherwise required. Operating horsepower may be only half of the required starting horsepower.
  7. Because the stator is rubber, large temperature fluctuation will lead to slight expansion, which means that the efficiency, flow rate and pressure will be different.

No, it’s not.

The progressive cavity pump is a positive displacement pump. It has only one screw rotor, which has slight interference fit with the rubber stator. Screw pumps also need at least two screw rotors to cooperate, and usually there are three or five screw rotors to cooperate. The name is also named after the number of screw rotors. For example, a pump with two screw rotors is called a twin screw pump.

Comparison of the media conveyed by different types of screw pumps:

  • Twin screw pump can transport lubricating, non-lubricating, corrosive and medium containing certain magazines, even used for oil, steam and liquid mixed transportation. Commonly used for conveying various oils, water, emulsion, paste, asphalt and chemical media, etc.
  • Three screw pump usually delivers lubricating oil, fuel oil, hydraulic oil, sealing oil-grade coolant, etc.
  • Five-screw pump is suitable for low-pressure and high-flow conditions, conveying lubricating medium, and it is more sensitive to impurities in the medium than three screw pump.

Screw pumps are not made of rubber like progressive cavity pumps, but almost all of them are made of metal. Performance: Screw pump can deliver larger flow and pressure.

No, it can’t.

Due to the slight interference fit between the stator and the rotor of the progressive cavity pump, it is not allowed to run dry. Once the dry running of the pump is not stopped in time, the stator will burn out immediately. Therefore, it is necessary to fill the pump cavity with the medium, and the medium in the system cannot be interrupted.

Special situation: When installing the pump, if you don’t know whether the motor is in the forward or reverse direction, you can run the pump 1-2 times in dry mode.

Yes, it is.

It was invented by French engineer MoiNeau, so it is called Mono Pump. It has many nicknames. Sometimes we will call it helical rotor pump, eccentric screw pump, PC Pump or PCM Pump, Crank Rod Pump and Snake Pump. In China, it is also called single screw pump and thick slurry pump. No matter how many nicknames it has, it belongs to positive displacement pump.


In 1930, when aviation pioneer René Moineau was designing compressors for early jet engines, he discovered that this principle could work efficiently for pumping fluids. So he cooperated with Robert Bienaime of Gevelot Group to establish PCM Pompes in 1932 and developed the world’s first known progressive cavity pump.

René Moineau

Founder of the PCM company in 1932, René Moineau is the inventor of the Progressing cavity pump, also known as Moineau pump Mono pump or PCM Pump.

  1. When the viscosity or thickness of the liquid is higher than that of water, which is not suitable for centrifugal pump delivery, use progressive cavity pump.
  2. When flow rate changes. Generally centrifugal pumps cannot achieve flow rate changes, while screw pumps can be achieved by adjusting the speed.
  3. When the suction conditions of the pumping applications are not ideal and when the suction pressure is lower than 28 inches of mercury (Hg), the progressive cavity pump can pump, but the centrifugal pump cannot.
  4. When transporting sensitive liquids that cannot be sheared, squeezed or agitated, the speed of the centrifugal pump is too high, which will easily damage the fluid structure.
  5. When the liquid contains solid particles, centrifugal pumps or other positive displacement pumps are easy to wear or block. At this time, because the stator and rotor of the progressive cavity pump has a wear resistance design, it will be more suitable for this application.

The main working parts of progressive cavity pump are stator and rotor. Because of the special geometric shape of stator and rotor, when assembled together, several separate sealing cavities will be formed. When the motor drives the rotor to move, the medium in each sealing cavity will be continuously and uniformly transported from the suction end to the extrusion end with constant volume.

It needs to be selected according to the physical and chemical properties of the conveyed medium in the current application;

Key technical factors:

1. Pump displacement

2. Pressure or conveying distance (including horizontal and vertical distance and number of elbows)

3. Media physical characteristics:

  • Viscosity >>>>> (considering its fluidity)
  • Temperature >>>>> (whether high and low temperature resistance is required)
  • Abrasivity >>>>> (with or without solid particles)

4. Chemical properties of medium

  • Corrosivity >>>>> (pH value)

5. Flow change >>>>> (consider using variable frequency motor)

Other factors:

1. Client’s choice and budget

2. On-site installation space

3. On-site environmental requirements >>>>> (using electricity or diesel power)

4. Installation method

Confirm the above information, and finally consider the material selection and processing technology of the pump body and its spare parts.

Finally, our factory will give you a reasonable and satisfactory design plan.

Progressive cavity pumps have self-priming performance and good suction performance, and the self-priming height is generally 2-5 meters (taking water as the test); When transporting sludge or medium with high viscosity, self-priming installation is generally not recommended, but natural inflow is recommended.

Usually we call the pump body as the pump cavity, that is, a closed space can be formed when the medium contacts the pump body or other parts.

The customer is required to provide the flow rate, output pressure or head of the fluid to be transported, and to inform the physical and chemical properties of the fluid in as much detail as possible, and then the factory will select and recommend for you based on experience. Because of improper selection of progressive cavity pumps, it is easy to cause many problems in use. The right pump can create more value and reduce costs for you.