What is the disadvantage of progressive cavity pump?

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. 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. For fluids with lower water content, the transport distance is shorter and higher pressure is required. 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 ; 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. 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. 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.

Is a progressive cavity pump the same as a screw pump?

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.

When to use progressive cavity pump ?

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. When flow rate changes. Generally centrifugal pumps cannot achieve flow rate changes, while screw pumps can be achieved by adjusting the speed. 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. 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. 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. Find out more

How do I choose a progressive cavity pump?

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 Pump Manufacturers and Suppliers in China

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Small Scale Progressive Cavity Pump for Accurate Dosing

Stainless Steel Dosing Pump for Dosing and Conveying

Stainless Steel Food Grade Progressive Cavity Pump

Direct-connected progressing cavity pumps

Direct Connection Progressive Cavity Pump in Industrial Design

progressive cavity pump in bearing block design

Progressing Cavity Pump in Bearing Block Design Construction

hopper progressive cavity pump in block construction

Open hopper feed progressive cavity pump in block construction

Open Hopper Feed Progressive Cavity Pump in Bearing Block Design

Hopper Pump with Feeding Screw and Bridge Breaking Paddle

Open Hopper Feed Pump with Feeding Screw and Bridge Breaking Paddle

Immersible Vertical Progressive Cavity Pump with Bracket or Flanges

General spare parts for most brand progressive cavity pump

G series single screw pumps

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 Type	Pressure Range (bar)	Capacity Range (m³/h)	Speed Range (rpm)	Inlet Size (G/DN)	Outlet Size (G/DN)	Motor Power (KW)
MJN025-2S	0~12	0~0.25	0~350	G1¼	G1¼	0.37
MJN05-1L	0~6	0~0.5	0~350	G1¼	G1¼	0.37
MJN05-2S	0~12	0~0.5	0~350	G1¼	G1¼	0.75
MJN1-1L	0~6	0~1	0~350	G1¼	G1¼	0.75
MJN1-2S	0~12	0~1	0~350	50	50	1.5
MJN1-4S	0~24	0~0.5	0~250	50	50	3
MJN3-1L	0~6	0~3	0~350	50	50	2.2
MJN3-2S	0~12	0~2.5	0~350	65	65	3
MJN3-4S	0~24	0~1.5	0~250	65	65	5.5
MJN5-1L	0~6	0~5	0~320	65	65	3
MJN5-2S	0~12	0~5	0~320	80	80	4
MJN5-3S	0~18	0~3	0~250	80	80	5.5
MJN5-4S	0~24	0~2	0~200	80	80	7.5
MJN10-1L	0~6	0~10	0~300	80	80	4
MJN10-2S	0~12	0~7	0~300	80	80	5.5
MJN10-3S	0~18	0~6	0~250	80	80	7.5
MJN10-4S	0~24	0~4	0~200	80	80	11
MJN15-1L	0~6	0~15	0~300	80	80	5.5
MJN15-2S	0~12	0~12	0~300	100	100	7.5
MJN15-3S	0~18	0~10	0~250	100	100	11
MJN15-4S	0~24	0~7	0~200	100	100	15
MJN25-1L	0~6	0~25	0~280	100	100	7.5
MJN25-2S	0~12	0~22	0~300	125	125	11
MJN25-3S	0~18	0~15	0~250	125	125	15
MJN25-4S	0~24	0~12	0~200	125	125	18.5
MJN50-1L	0~6	0~50	0~280	125	125	11
MJN50-2S	0~12	0~35	0~250	150	150	22
MJN50-3S	0~18	0~30	0~230	150	150	30
MJN50-4S	0~24	0~26	0~200	150	150	37
MJN80-1L	0~6	0~80	0~280	150	150	22
MJN80-2S	0~12	0~60	0~280	150	150	37
MJN80-3S	0~18	0~42	0~200	150	150	45
MJN80-4S	0~24	0~25	0~150	150	150	55
MJN120-1L	0~6	0~120	0~250	150	150	37
MJN120-2S	0~12	0~100	0~270	200	200	45
MJN120-3S	0~18	0~60	0~180	200	200	55
MJN120-4S	0~24	0~50	0~150	200	200	55
MJN180-1L	0~6	0~180	0~220	200	200	45
MJN180-2S	0~12	0~170	0~220	200	200	55
MJN300-1L	0~6	0~300	0~220	200	200	55

Mingjie Progressive cavity Pump Parameter Table

G type single screw pump

Progressive cavity pump

Mingjie pump’s catalog

Small scale progressive cavity pump

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Some famous progressive cavity pump manufacturers

Seepex, Inc. — Brand: Seepex pump
Erich NETZSCH GmbH & Co. Holding KG — Brand: Netzsch pump
Moyno In — Brand: Moyno pump
NOV Process & Flow Technologies UK Limited — Brand: Mono pump
MXQ, LLC. — Brand: MXQ pump
ITT Bornemann GmbH — Brand: Bornemann pump
PCM Group UK Ltd — Brand: PCM pump
Allweiler Group GmbH — Brand: Allweiler pump
兵神装備株式会社 / HEISHIN Ltd. — Heishin pump

SEEPEX-Logo
NETZSCH-logo
Moyno-logo
Mono Logo
Heishin logo
Bornemann-logo
Allweiler-logo
PCM-logo

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.

Advantages:

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).

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

No.	Name	Matiral
1	Material-out chamber	HT200, 1Cr18Ni9Ti, 304, 316L, 2205, Ti
2	Rotor	45#, 2Cr13, 304, 316L, 2205, Ti (Heat-treatable and electroplated Cr)
3	Stator	NR, NBR, Q, EPM, FKM
4	Suction chamber	HT200, 304, 316L, 2205, Ti
5	Driving shaft	45#, 2Cr13, 304, 316L, 2205, Ti (Heat-treatable and electroplated Cr)
6	Gear motor	/
7	Base plate	45#, 2Cr13, 304, 316L, 2205, Ti
8	Coupling rod	45#, 2Cr13, 304, 316L, 2205, Ti (Heat-treatable and electroplated Cr)
9	Universal joint assembly	NBR + 45#, 2Cr13, 304, 316L
10	Shaft sealing	Customized according to media

Progressive cavity pump parts material list

Applications

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.

Progressive cavity pump performance parameters and their influencing factors

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Progressive cavity pump performance parameters usually refer to flow, discharge pressure, suction pressure, rotational speed, pump input power (shaft power), … Read more

Repair other brands of progressive cavity pump

Progressive cavity pump usage guidelines

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Installation When assembling the pump, the relevant parts that need to be lubricated (such as bearings, universal joints, etc.) must … Read more

Application of progressive cavity pump in red wine making process

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Application of progressive cavity pump in paper industry

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Application of progressive cavity pump in coal water slurry preparation

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Honey delivery by progressive cavity pump

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01. High viscosity When the viscosity or thickness of liquid is higher than water, and centrifugal pump or gear pump … Read more

Progressive cavity pump rotor processing

Progressive cavity pump rotor manufacturing 8 steps

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The progressive cavity pump rotor is one of the important parts of the progressive cavity pump. Its machining accuracy and … Read more

What are the reasons for the damage to the stator of the progressive cavity pump?

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Posted in Pump Troubleshooting

As one of the vulnerable parts of the progressive cavity pump, the service life of the stator has always been … Read more

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.

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.
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.
For fluids with lower water content, the transport distance is shorter and higher pressure is required.
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;
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.
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.
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.

1932

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.

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.
When flow rate changes. Generally centrifugal pumps cannot achieve flow rate changes, while screw pumps can be achieved by adjusting the speed.
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.
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.
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.

Find out more

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.

Find out more

High Efficiency!

Friendly Reminder

Some famous progressive cavity pump manufacturers

Transport Characteristics：

Advantages:

What is a

Progressive Cavity Pump ?

Progressive Cavity Pumps Working Principle

Structure Diagram

Applications

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

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

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