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Peristaltic Pump

Peristaltic Pump in laboratory 

1. What is peristaltic pump
    1.1. Definition of peristaltic pump
    1.2. peristaltic pump application
2. Advantages of using peristaltic pump
3. Peristaltic pump working principle
4. Types of peristaltic pump
    4.1. Peristaltic hose pump
    4.2. Variable speed peristaltic pump
    4.3. Flow rate peristaltic pump
5. Peristaltic pump specifications
    5.1. Double head peristaltic pump
    5.2. High flow peristaltic pump
    5.3. Micro peristaltic pump
    5.4. Multi channel peristaltic pump
6. Peristaltic pump tubing
7. How to maintain peristaltic pump?
8. How to order peristaltic pump?


What is peristaltic pump?

Definition of peristaltic pump

Peristaltic pump can also be called constant flow pump, is a kind of constant flow pump, because the delivery accuracy can reach up to 0.5%, so it plays the role of constant flow. Peristaltic pump is a fluid transfer device that can control the flow rate. Commonly, the fluid in the hose is moved in a specific direction by repeatedly compressing the flexible tube, and the flow rate is determined by the diameter of the tube and the compression speed and used in systems such as liquid phase chromatography and perfusion.

Peristaltic pump application

Peristaltic pumps have a wide range of applications, used in the laboratory is called laboratory peristaltic pump, applied in the industrial field is called industrial peristaltic pump, and the pharmaceutical industry will also use peristaltic pump, although the name is different, the core technology is peristaltic pump fluid transfer.
1. Laboratory area
Lab peristaltic pump offers excellent repeatability accuracy in small volume fluid dispensing and metering. No valves need to be installed, eliminating clogging and siphoning, which are common with fluids. Common applications in laboratory research and development include cellular tissue transfer, specimen decolorization, perfusion, liquid chromatography, and acidic or alkaline solution transfer.

2. Food, chemical field
Many existing pump hose materials can meet the requirements of USP, FDA, and NS. The use of peristaltic pump can easily transport viscous liquids and liquids with fine particles, peristaltic pumps do not need to be cleaned, replace the fluid simply by replacing the hose. Common uses are the dispensing of juice, yogurt, flavorings, syrups, and filling of other food products in the food production line.

3. Pharmaceutical field
Peristaltic pump use non-contaminating and non-corrosive pump tubing. A variety of drives are available for pumping nutrients, pH adjusting agents, dispensing make-ups, etc. in the mordant fermentation process.

4. General area
Peristaltic pumps can work in continuous fluid transfer situations while identifying and solving many difficult fluid transfer problems peomptly. It can convey sewage, suspended solids, corrosive chemicals, and other difficult fluids, and some of the common uses are fuel liquids, chemical etching fluids for etching, printing inks, laundry chemical solutions, abrasive fluids, lubricating fluids, and other conveyances.

Advantages of using peristaltic pump

The use of peristaltic pump has the following advantages:
1. No contamination: the fluid only touches the pump tube, not the pump body.
2. High precision: repeat accuracy, high stability accuracy.
3. Low shear: ideal tool for conveying shear-sensitive, aggressive fluids.
4. Good sealing: good self-priming ability, can idle, can prevent backflow.
5. Simple maintenance: no valves and seals.
6. It can easily convey solid, liquid, or gas-liquid mixed-phase fluids, allowing the diameter of solids contained in the fluid to reach 40% of the inner diameter of the tubular element, and can convey various fluids with It can convey various materials with abrasive, corrosive, oxygen-sensitive characteristics and various foodstuffs, etc. Only the hose is the part that needs to be replaced, and the replacement operation is extremely simple, except for the hose, the products conveyed do not come into contact with any parts.

Peristaltic pump working principle

Peristaltic pump is like squeezing a hose filled with fluid with your finger, as your finger slides forward the fluid inside the tube moves forward. Peristaltic pump is also this principle only by the roller instead of the finger. By alternately squeezing and releasing the flexible delivery hose of the pump to pump the fluid. As two fingers squeeze the hose, with the movement of the fingers, the tube forms a negative pressure, the fluid flow.

Peristaltic pump is a section of the pump tube between the two rotary rollers to form a "pillow" shaped fluid. The flow rate depends on the pump head speed and the "pillow" size, the number of "pillows" generated by each revolution of the rotor, and the product of three parameters. The size of the "pillow" is generally a constant (except when pumping particularly viscous fluids).

Compared to pumps with the same rotor diameter, which produce a larger "pillow" volume of the pump, the volume of fluid delivered per rotation of the rotor is also larger, but the degree of pulsation generated is also larger. With the smaller "pillow" volume of the pump, its rotor per revolution of the fluid volume is also smaller; and, the rapid, continuous formation of the small "pillow" so that the fluid flow is smoother.

Types of peristaltic pump

Peristaltic hose pump

Peristaltic hose pump is a kind of rotor type volumetric pump because its working principle is similar to the digestive tract to peristaltic way to transport gas, solid, liquid three-phase media and named.
Hose pump designers and users of the primary value is its ability to transport strong abrasive media. It has no valve, no seal and the only part in contact with the medium is the inner cavity of the rubber hose, the rotor of the compressed hose is completely independent of the medium.
The unique features of the hose pump: no other pump type than the hose pump has a better self-priming ability, almost perfect vacuum can be generated to suck liquid; conveying gas, foam liquid without air resistance; conveying high viscosity, shear-sensitive media is also a strong point; fixed displacement per revolution and independent of the outlet pressure, is the natural metering pump.

Variable speed peristaltic pump

Variable speed peristaltic pump has the basic control functions of peristaltic pump, display speed, start/stop, direction, speed adjustment, filling and emptying, power down memory, external control input, etc.

Flow rate peristaltic pump

In addition to the basic functions, flow peristaltic pump adds flow rate display, flow rate calibration, communication, and other functions.

Peristaltic pump specifications

Double head peristaltic pump

TypeVariable speed peristaltic pump
Flow Range0.017-140ml/min
Power Rating20W
Speed range0.1-100rpm
Timing range0.01s-99h
Power supplyAC 220V 50Hz
* Double head peristaltic pump adopts embedded design, can be used independently, and also can be used with customer equipment.
* With the unique timing function, it can realize a simple dispensing operation.
* Built-in imported peristaltic pump hose, strong and wear-resistant, simple installation, acid and alkali corrosion resistance, long service life.

High flow peristaltic pump

TypeFlow rate peristaltic pump
Flow Range﹤3365ml/min
Power Rating54W
Speed range0.1-600rpm
Power supplyAC 220V 50Hz
* Peristaltic pump roller using 304 stainless steel, using automatic high-precision CNC lathe fine processing, long wear-resistant rust, so that the operation is smoother.
* Built-in intelligent algorithm software, to achieve 0.1RPM precise and subtle operation control.
* Wide voltage switching power supply, to ensure stable operation of the peristaltic pump.

Micro peristaltic pump

TypeVariable speed peristaltic pump
Variable speed peristaltic pump
Rated voltage
Rated current800mA
Pumping capacityPumping capacity
* Micro peristaltic pump uses the original motor, strong and durable, less heat and low noise, the surface increases the corrosion-resistant technology, durable.
* The use of environmentally friendly raw materials, safe and secure, to meet the demand for safety, more durable raw materials.
* High-quality wire interface, smooth output, energized more smoothly, not easy to damage.

Multi channel peristaltic pump

TypeVariable speed peristaltic pump
Power Rating50W
Speed range0.1-100rpm
Rotational speed adjustment resolution0.1rpm
Power supplyAC 220V 50Hz
* Multi channel peristaltic pump with flow calibration function.
* Flow rate and speed are displayed on the same screen, which is more convenient to control.
* Large output torque to accommodate more types of pump heads and more channels.

Peristaltic pump tubing

In peristaltic pump, choosing the right pump tube is as important as choosing the best pump head. The general pump head can be adapted to a variety of sizes of the pump hoses. There is a wide variety of hose materials on the market, but only a few materials can be used as pumping tubes.
Peristaltic pump tubing selection should meet the following requirements:
Chemical compatibility
When selecting a peristaltic pump for pumping corrosive fluids, it is critical to select the correct pump tubing material. Choosing the wrong tubing can lead to dangerous situations, potentially destroying equipment and endangering personal safety. Check the chemical compatibility chart provided by the pump and tubing manufacturer for each application. The pump must be tested before using new or unlabeled levels of chemicals. Immerse a small section of pump tubing in the fluid. Check the pump tubing for changes in size, color, weight, and strength. If possible, test the pump tubing in the pump before stretching it for use. Flexing the pump tubing during extrusion can rub chemicals into the tubing walls and accelerate the aging and disintegration of the tubing.

Isolating fluids is critical in many applications such as laboratory research, pharmaceuticals, and biotechnology product manufacturing. Numerous studies have demonstrated that silicone tubing and silicone-based materials do not chemically react with various biological materials. There are other types of materials that have this property and can meet USP Class VI requirements.

Flexural Resistance
The ability to withstand repeated roller crushing varies from tube to tube. In general, the combination of several parameters - specific pump tube size, pump tube material, pump head type, and operating speed - determines the service life of the pump tube. Pump tube service life, or the flexural yield limit in the pump, is the primary consideration before committing to a new application.

Fluid Pressure
Fluid pressure is often a constraint on the ability of pump tubing to convey pressurized fluids. Most peristaltic pumps use unsupported tubing. These pump tubes have a pressure limit of 2 bar - 3 bar.

Hose hardness
Hose wall hardness is critical to determining the pumping capacity of a particular pipe. If the pump hose is too soft, it will break easily; if the hose is too hard, the pump will not work. A Shore hardness tester can be used to measure the hardness of the hose.

How to maintain peristaltic pump?

Laboratory peristaltic pump is easy to use, and change the delivery of liquid, as long as the replacement hose can be achieved without any pump cleaning; filling volume is simple and convenient to set, but the laboratory peristaltic pump in the process of use is inseparable from the regular maintenance, the following are tips on the maintenance of peristaltic pump:
1. The roller should be oiled regularly to keep the roller in a good lubrication state. Note: When oiling, you should check the tightness of the roller, if you find that the roller is too loose, tighten it with sharp pliers, if you find that the roller has a loose feeling and cannot be eliminated after adjusting the tightness, then you should examine the wear of the inner bearing of the roller twice, and you can take it down to replace the bearing or change the roller.

2. Roller bearings should be injected with grease every six months or so.

3. 3 new reducers after running for a while, drain the oil in the oil tank, and re-add oil.

How to order peristaltic pump?

ANTITECK provide lab equipment, lab consumable, manufacturing equipment in life sciences sector.
If you are interested in our peristaltic pump or have any questions, please write an e-mail to [email protected], we will reply to you as soon as possible.

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