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Mingjie Pump is a professional large-flow, high pressure and small flow 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

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

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;

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

The stator and the rotor, driven by an external power source, mesh with each other to form a sealed cavity that separates the suction cavity and the discharge cavity, thereby generating volume changes to achieve the purpose of liquid delivery;


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


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


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 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 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.

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.