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How Do Peristaltic Pumps Work?

Jun. 08, 2023


The peristaltic pump initially is used in medicine blood transfusion. Gradually the peristaltic pump is widely used in laboratory experiments with microfluid dispensing, dosing, and mouse perfusion. Because it ensures high precision, no pollution, low cost and free maintenance. Now peristaltic pumps have been continuously improved. Higher precision, more reliability and more practical. Cover wider flow rate. It has wider applications, such as water treatment, mining, chemical reaction and food beverage filling, etc.

The peristaltic pump is a type of positive displacement pump. It provides the best solution for accurate fluid transfer and dosing. The flow rate is from 0.2ul to 33000ml/min. Repeatable accuracy flow rates. Unlike other pumps, the peristaltic pump is low maintenance and has no cross-contamination. Peristaltic pumps are widely used in laboratory, medical and industrial fluid transfer and filling.

How do peristaltic pumps work?

The peristaltic pump is a liquid transfer device that controls the flow rate. It consists of a motor, pump head, and tubing. The working principle of peristaltic pump: There are rollers in pump heads that compress the tube as they rotate. With the rollers rotating, it creates a vacuum that draws fluid through the tube and then pushes it so that can pump liquid. 

With the rolling of the roller, the elasticity of the hose will make the pump tube continue to return to its original shape, forming a negative pressure at the pump inlet, prompting the liquid to flow and fill the pipeline to achieve the purpose of delivery.

Everything you need to know about peristaltic pump

What are the advantages and disadvantages of peristaltic pumps?

Advantages of peristaltic pump:

1. High accurate repeatable flow rate

The peristaltic pump is a positive displacement pump, which means that it moves a fixed volume of fluid or gas with each cycle of the pump. This makes it ideal for applications where precise control of flow rate and volume is required, such as in medical and laboratory settings.

2. No cross contamination

The peristaltic pump that nothing but the inner of the tube touches the fluid. So they offer the extreme in purity. Safe and no pollution in the whole transfer process.

3. Low maintenance

Peristaltic pump tubing is the only consumable. You just need to replace the tube regularly. No more other maintenance costs.

4. Easy to use

Peristaltic pumps are very simple to use. Easy tube loading.

5. Corrosion-resistant and viscous fluid transfer 

Peristaltic pumps can transfer various kinds of fluid, such as organic solvents, and sulfuric acid. The peristaltic pump tube is anti-corrosion.  Also, the peristaltic pump can transfer the viscous fluid such are honey and ketchup

6. Stainless rollers with a larger diameter. This reduces pulsations, friction and mechanical strain on the tubing leading to better pump performance.

7. High-quality stepper motor together with integrated microprocessor electronics assure the high quality of peristaltic pump with a high precision flow rate.

8. Support multi-remote control methods. This increases the scope of use of the pump in automatically controlled systems. (eg. fermentation, chemical synthesis, fraction collection, etc.)

9. Long-time service, easy handling.

Disadvantages of peristaltic pumps

The disadvantage of a peristaltic pump is pulse flow. Because the peristaltic pump transfers the fluid by alternately squeezing and releasing the elastic hose through the rollers, the fluid enters the pump head and is accumulated between the two rollers to form a 'fluid pillow'. This is followed by a short flow break, as a later section of the pump tubing is blocked again by the rollers, again forming a 'fluid pillow'. Reciprocating in this way, a stream of fluid is formed instead of a smooth and continuous fluid. This phenomenon is called a pulse.

What is a peristaltic pump used for?

  • Medicine

-Blood dialysis

-Medicine infusion pumps

-Liposuction machine

-Pharmaceutical production

  • Laboratory Research


-Tissue dissociation

-Media dispenser

-Ammonia nitrogen detector

-Inject sodium hypochlorite liquid

  • Agriculture

-Seed coating machine

-Dosers for hydroponic systems

  • Food industry

-Beer Brewing

-Milk vending machine

-Beverage dispensing

  • Chemical

- Printing and paint

- Dosing systems for dishwasher and laundry chemicals

  • Industry

-Mining industry

-Fermentation tanks

-Inkjet printers

-Pulp and paper plants

Can peristaltic pumps run continuously?

The peristaltic pump is a type of positive displacement pump, it can dry-run and run continuously. The continuous working time is affected by two main factors: the lifetime of the motor and tube. You just pay attention to the tube and regularly replace the tube. The lifespan of a stepper motor is about 5,000 to 20,000 hours.

Can peristaltic pumps pump air?

Yes, the peristaltic pump not only pump fluid but also pump air. Because the peristaltic pump is a type of positive displacement pump. The working principle of the peristaltic pump is to alternately squeeze the tube through the rollers. During the process of squeezing the tube and releasing it, a negative pressure is formed inside the tube to absorb gas or liquid. 

Is a peristaltic pump a positive displacement pump?

Yes, the peristaltic pump is a type of positive displacement pump. 

The peristaltic pump tube is squeezed and closed completely by the roller, and the fluid will not flow back, so the peristaltic pump is a positive displacement pump or a positive displacement pump. The speed of the roller is proportional to the flow rate.

How to maintain a peristaltic pump?

The maintenance of a peristaltic pump involves several steps to ensure its optimal performance and longevity. Here are some key aspects of peristaltic pump maintenance:

1. Tube replacement: regularly inspect and replace the tube. After 220 hours of working, inverted the tube. Because after squeezing one side of the tube for a long time, it is easy to cause damage to one side, and flipping it can increase the service life.

2. Lubrication: Follow the manufacturer's guidelines regarding lubrication and use the recommended lubricant in the appropriate quantity to ensure smooth operation.

3. Proper Storage: When not in use, store the peristaltic pump in a clean and dry environment to prevent the accumulation of dust or moisture. 

What factors will affect the flow rate of the peristaltic pump?

Flow rate (means ml/min) is an important parameter for peristaltic pumps. The clients select the right peristaltic pumps according to the flow rate range first. These factors will affect the flow rate:

- Tube inside diameter: higher flow rate with larger tube inside diameter

- Rotational speed: higher flow rate with higher rotation speed

- Inlet pulsation: the pulse reduces the filling volume of the hose.

- Viscosity of fluid: lower flow rate with viscous fluid 

Besides, the pump itself will also affect the flow rate. Regular maintenance and calibration are necessary for an accurate flow rate.

Peristaltic Pump VS Centrifugal pump

Peristaltic pumps and centrifugal pumps are two different types of pumps that are used for different applications. Here are some of the key differences between the two:

1. Working Principle: The working principle of a peristaltic pump is based on the peristaltic action of a flexible tube, while a centrifugal pump works by using centrifugal force to move the fluid.

2. Flow Rate: Peristaltic pumps are generally used for low flow rates, typically less than 50 gallons per minute (GPM), while centrifugal pumps are used for higher flow rates, typically greater than 50 GPM.

3. Pressure: Peristaltic pumps are capable of generating high pressure, up to 100 psi, while centrifugal pumps are better suited for low to medium pressure applications, typically up to 50 psi.

4. Maintenance: Peristaltic pumps are easier to maintain and clean, as the fluid only comes into contact with the tubing, which can be easily replaced. Centrifugal pumps require more maintenance, as the impeller and other components can wear out over time.

5. Fluid Compatibility: Peristaltic pumps are compatible with a wide range of fluids, including corrosive and abrasive fluids, while centrifugal pumps are better suited for clean fluids that do not contain solids or abrasives.

Overall, peristaltic pumps are better suited for low flow rate, high pressure, and abrasive fluid applications, while centrifugal pumps are better suited for high flow rate, low to medium pressure, and clean fluid applications.

Chonry Peristaltic Pump

Chonry is the leading peristaltic pump manufacturer in China. We provide reliable innovative and high-performance peristaltic pumps. Now we have 30+ series and 200+ products. We have got the CE and ISO 9001 certified.

Chonry BW100 is a basic laboratory peristaltic pump. Small flow rate, highly accurate repeatable flow. It can be used for transferring the chemical. While the industrial peristaltic pump is a high flow rate. Easy to use. It can pump the slurry in the mining industry. In addition, Chonry manufactures syringe infusion pumps, explosion-proof pumps and filling dispensing systems to meet different requirements.

Chonry peristaltic pumps are precise at dosing and metering: they offer repeatable accuracy of 1% without any slip. If you are interested in peristaltic pumps, please feel free to contact us! 

Everything you need to know about peristaltic pumpEverything you need to know about peristaltic pumpEverything you need to know about peristaltic pumpEverything you need to know about peristaltic pump
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Baoding Chuangrui Precision Pump Co., Ltd. is located in Hebei of China. Started production of the peristaltic pump in 2010, as the top pump manufacturer in China, we now have 30 series production including peristaltic metering pump, pump head, dispensing filling system, micro gear pumps and industrial peristaltic pumps.

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