Industrial pumps can be separated into two primary classifications: dynamic pumps and positive displacement pumps.
Dynamic pump types:
Positive displacement pump types:
Dynamic pumps have rotating impellers or blades to transfer fluid from one place to another. The most common type is centrifugal pumps. Dynamic pumps are commonly used for applications requiring high flow rates and low viscosity fluids, such as water treatment and distribution, chemical processing plants, and oil refineries.
Positive displacement pumps are designed to handle a wide range of viscosities and provide a constant flow, which makes them common options for applications requiring precise flow rates or high pressures. Common applications include the food, chemical, and pharmaceutical industries.
The QUANTM electric diaphragm pump is an electrically operated double diaphragm (EODD) pump from Graco that addresses many of the common concerns above with other types of pumps. Compared to traditional industrial pump types, QUANTM provides much more operational flexibility and control. Take a look at the benefits:
Thank you for contacting Graco. We have received your message and will contact you shortly.
Thank you for your inquiry
Mingjie Pump is a professional large-flow, high pressure, high viscosity and accurately measured progressive cavity pump manufacturer and supplier.
We will contact you within 1 hours, please pay attention to the with the suffix “@mingjiepump.com”.
Your Name Addess* MessageHome>PC Pumps
Note: We can provide after-sales replacement spare parts and complete pump repair services for these pump manufacturers.
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.
We will contact you within 1 hours, please pay attention to the with the suffix “@mingjiepump.com”.
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;
Do you know?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.
Mingjie Pump Professional Progressive Cavity Pumps and Parts Manufacturer In the industrial field, progressive cavity pumps play an important role as a key fluid transmission equipment in various industries. With the improvement of industrial automation and production efficiency, the progressive cavity pump industry is also showing a rapid growth trend. According to the latest report…
Progressive cavity pump performance parameters usually refer to flow, discharge pressure, suction pressure, rotational speed, pump input power (shaft power), medium characteristics, medium temperature and medium viscosity. The flow is affected by the rotational speed and the viscosity of the medium, and the viscosity of the medium also affects the input power of the pump….
When assembling the pump, the relevant parts that need to be lubricated (such as bearings, universal joints, etc.) must be filled with grease, usually 2/3 of the cavity volume. Check whether the connection parts of the unit are firmly fixed. The pump unit (including the independently installed pump, reducer and prime mover) should have a…
Progressive cavity pump has been widely used in wine making process. When the picked grapes are threshed and threshed, they need to be crushed. For crushed grapes, we usually use square feeding progressive pump to transport them to fermentation tank for fermentation. Stator: NBR / food grade NBR Rotor: SS304 / SS316L (chrome plated) Coupling…
The general service life of papermaking equipment is 15 years. The pump only takes up a small part of the investment, but it plays a key role in the overall operation period of the equipment. The single screw pump provided by Mingjie pump has been used by many paper manufacturers in recent years.
Water slurry is a mixture made by adding a certain amount of additives to pulverized coal and water. Improper handling of coal water slurry during storage, transportation and application will cause soft precipitation and stratification to destroy its combustion characteristics. When the single screw pump is working, the volume of the pump cavity is constant,…
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.
You will get efficient and thoughtful service from Shuanglian.
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 , 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 and developed the world’s first known progressive cavity pump.
René Moineau
Founder of the PCM company in , 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.
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:
4. Chemical properties of medium
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.
Fast Delivery & 24/7 SupportFill out the form below with your specifications, and one of our engineers will provide a tailored proposal.
The company is the world’s best G series single screw pump supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
Your Name Addess* Message