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No1. The Engineer’s Guide- How to Choose Motors for Peristaltic Pumps

Jiaming CaiApril 25, 2024

I. Inrodcution

I.I What is a peristaltic Pumps

Peristaltic pump is a small water treatment pump that delivers fluid by compressing and relaxing hoses or pipes inside the pump.

Peristaltic pumps transport liquids by squeezing a hose, so the liquid only passes through the hose inside the pump, avoiding dead spots. This design makes the pump extremely easy to clean and prevents residue, making it highly suitable for applications requiring clean transportation.


I.II How does a peristaltic pump work?

  • The peristaltic pump realizes liquid transportation by rotating the roller and squeezing the elastic hose. As the roller rotates, the inlet of the hose generates negative pressure to suck in the liquid, and the outlet generates positive pressure to discharge the liquid.
  • During the working process of the peristaltic pump, the hose is in a peristaltic state, so it is called a peristaltic pump, also called a hose pump.
  • The rotating and alternating squeezing of the peristaltic pump roller will keep the pressure point of the hose always closed, so it has the function of a shut-off valve, but the liquid output by the peristaltic pump will also produce a pulse waveform synchronously.

I.III Advantages of presitaltic pump

No ContaminationThe fluid only contacts the hose, avoiding contamination with other mechanical parts, ideal for sterile applications.
Easy MaintenanceMinimal maintenance is required as the fluid does not contact the pump mechanism, typically just hose replacement.
VersatilityCapable of handling viscous fluids, suspensions with solid particles, and chemically aggressive substances.
Precision DosingOffers precise control over flow rates through adjustable speeds, suitable for dosing applications.
Gentle on FluidsThe peristaltic action mimics natural peristalsis, gently moving the fluid without shearing or damaging components.
Hygienic ApplicationIts design and operational mode make it suitable for industries requiring high levels of hygiene, like food and pharma.

I.VI Application of presitaltic pump

Peristaltic pumps are suitable for many different industries and application scenarios due to their unique design and functions. Here are some of the main application areas of peristaltic pumps.

Applications of Peristaltic Pumps

Peristaltic pumps are uniquely suited for a variety of industries due to their distinctive design and operational characteristics. Below are some of the key application areas for peristaltic pumps.

Medical Peristaltic Pumps
Medical Peristaltic Pumps
Labor Peristaltic Pumps
Labor Peristaltic Pumps
Watertreatment Peristaltic Pumps
Watertreatment Peristaltic Pumps
Medical and Biotechnology– Drug and Vaccine Delivery: Transporting and controlling dosages of medicines and vaccines.
– Blood Processing: Used in dialysis machines and surgical equipment.
Laboratory and Analytical Equipment– Sample Handling: Precise dispensing of chemical and biological reagents in labs.
– Analytical Instruments: Used to control reagent flow accurately within analytical devices.
Food and Beverage Industry– Safe and Hygienic Transport: Transferring food ingredients like syrups, jams, and dairy products.
– Dosing Applications: Used for adding flavor enhancers, colorants, and other additives.
Chemical and Processing Industry– Transporting Corrosive or Hazardous Chemicals: Handling acids, bases, and solvents.
– Precise Mixing and Dispensing: Used in the accurate mixing and dispensing of fertilizers and pesticides.
Water Treatment and Environmental Technology– Chemical Dosing in Wastewater Treatment: Application of chemical agents in wastewater treatment.
– Handling Sludge and High-Viscosity Liquids: Used for processing sludge and other viscous liquids.
Printing and Packaging– Ink and Coating Transport: Conveying printing inks and coatings.
– Packaging Machinery: Precisely adding adhesives and sealing materials in packaging machines.
Cosmetics and Personal Care– Safe Transport: Transferring shampoos, conditioners, lotions, etc.
– Precision Dosing: Accurate dosing of fragrances and active ingredients.

II. How to Choose Motors for Peristaltic Pumps

II.I The basic structure of Peristaltic Pumps

To choose a right motor for a peristaltic pump, we need to first understand the basic structure of a peristaltic pump and what role the motor plays in the peristaltic pump.

The basic structure of a peristaltic pump is relatively simple and mainly consists of the following core components:

Peristaltic pump structure
Peristaltic pump structure
  1. Pump Head
    The pump head is one of the main components of a peristaltic pump and is responsible for housing and driving the hose or pipe. It usually consists of one or more rollers or rotors that compress the hose as they rotate, pushing the fluid forward.
  2. Hoses or pipes (Tubing)
    The hose is the only component in a peristaltic pump that comes into contact with the fluid, so its material selection is critical to the chemical compatibility, durability, and overall performance of the pump. Hoses need to be elastic and strong enough to withstand repeated compression and relaxation movements without fatigue and breakage.
  3. Geaed Motor
    The motor is the power source that drives the pump head to rotate. Depending on the application requirements, different types of motors can be used, such as stepper motors, servo motors or regular AC motors. The choice of motor directly affects the flow control accuracy and adjustable range of the pump.
  4. Drive System (Rotor Assembly)
    The drive system transmits the rotational power of the motor to the pump head. This usually involves a series of gears, belts or direct connections that regulate the rotational speed and thus the speed and pressure of fluid delivery.
  5. Controller
    The controller is used to adjust the speed of the motor, thereby controlling the flow of fluid and the operating status of the pump. Advanced peristaltic pumps may be equipped with programmable logic controllers (PLCs) or other intelligent control systems for automated and precise flow control.


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