Kamoer 12v Stepper Motor 3 or 6 Roller easy load Peristaltic Pump for Liquid Transfer Metering

Product Overview

Description

 

 Kamoer 12V Stepper Motor Peristaltic Pump for Auto Analyzer

 

History——Peristaltic pump

 

The peristaltic pump was first patented in the United States by Eugene Allen in 1881. It was popularized by heart surgeon Dr. Michael DeBakey while he was a medical student in 1932. 

 

Key design parameters

(1) Chemical compatibility

The pumped fluid contacts only the inside surface of the tubing thereby negating concern for other valves, O-rings or seals that might be incompatible with fluid being pumped. Therefore, only the composition of the tubing that the pumped medium travels through is considered for chemical compatibility.

 

The tubing needs to be elastomeric to maintain the circular cross section after millions of cycles of squeezing in the pump. This requirement eliminates a variety of non-elastomeric polymers that have compatibility with a wide range of chemicals, such as PTFE, polyolefins, PVDF, etc. from consideration as material for pump tubing. The popular elastomers for pump tubing are nitrile (NBR), Hypalon, Viton, silicone, PVC, EPDM, EPDM+polypropylene (as in Santoprene), polyurethane and natural rubber. Of these materials, natural rubber has the best fatigue resistance, and EPDM and Hypalon have the best chemical compatibility. Silicone is popular with water-based fluids, such as in bio-pharma industry, but have limited range of chemical compatibility in other industries.

 

Extruded fluoropolymer tubes such as FKM (Viton, Fluorel, etc.) have good compatibility with acids, hydrocarbons, and petroleum fuels, but have insufficient fatigue resistance to achieve an effective tube life.

(2) Inside diameter 

For a given rpm of the pump, a tube with larger inside diameter (ID) will give higher flow rate than one with a smaller inside diameter. Intuitively the flow rate is a function of the cross section area of the tube bore.

 

(3) Flow rate

 

Flow rate is an important parameter for a pump. The flow rate in a peristaltic pump is determined by many factors, such as:

 

Tube ID - higher flow rate with larger ID

Pump head OD - higher flow rate with larger OD

Pump head RPM - higher flow rate with higher RPM 

 

Advantages——Peristaltic pump

 

u No contamination. Because the only part of the pump in contact with the fluid being pumped is the interior of the tube, it is easy to sterilize and clean the inside surfaces of the pump.

u Low maintenance needs. Their lack of valves, seals and glands makes them comparatively inexpensive to maintain.

u They are able to handle slurries, viscous, shear-sensitive and aggressive fluids.

u Pump design prevents backflow and syphoning without valves.

 

Typical applications——Peristaltic pump

• Medicine
  
  
  
  • Dialysis machines
  
  
  • Open-heart bypass pump machines
  
  
  • Medical infusion pumps
  
  
  
  


• Testing and research
  
  
  
  • Autoanalyzer
  
  
  • Analytical chemistry experiments
  
  
  • Carbon monoxide monitors
  
  
  • Media dispensers
  
  
  
  


• Agriculture
  
  
  
  • 'Sapsucker' pumps to extract maple tree sap
  
  
  
  


• Food manufacturing and sales
  
  
  
  • Liquid food fountains
  
  
  • Beverage dispensing
  
  
  
  


• Chemical handling
  
  
  
  • Printing, paint and pigments
  
  
  • Pharmaceutical production
  
  
  
  


• Engineering and manufacturing
  
  
  
  • Concrete pump
  
  
  • Pulp and paper plants
  
  
  
  


• Water and Waste




• Sewage sludge


• Aquariums, particularly calcium reactors

How does a fluid pump work?

 

A fluid pump is a system that allows liquid to overcome gravity. Nearly all pumps share a few common pieces: and inlet and outlet for the fluid, a method of making the fluid move and a motivating force. While the inner construction and the motivation for the pump may change, most of them work using a process called siphoning. This is basically the tendency a fluid has to keep moving once it starts moving. In many cases, a pump gets the fluid going and then siphoning does a lot of the pump’s work for it.

 

In order to understand how a fluid pump works, it is important to understand siphoning. When fluid in a pipe begins to move, the fluid behind it will move along with it, even if that means it flows uphill. This is caused through a number of factors, but it is mostly based on pressure differences. As the liquid flows forward, it moves away from liquid in parts of the pipe that don’t flow as well. For example, the liquid in a straight section of pipe will begin to flow away from the liquid in a vertical section.

 

As this fluid moves away, a low-pressure area is created behind it. The water in the vertical pipe will then have a high-pressure area one side, the pressure of the fluid behind it, and a low-pressure area on the other. This will cause the fluid to move forward as soon as the pressure difference overcomes the force of gravity on the fluid. The sequence will continue indefinitely, creating steadily flowing liquid, as long as the pressure remains constant.

 

In many ways, a common fluid pump just adds additional motivation to this natural process. Most of the time, a fluid pump has four main parts. The input pipe and outlet pipe are simply fixed pipes that contain the fluid. In order for siphoning to work well, these pipes have as little air in them as possible. Excess air will keep the pipe pressure higher, so the siphoning requires more force to move the fluid.

 

The other two parts of a fluid pump are the more important parts. One is a power source and the other is a way of generating additional force or preventing force from dropping on the backside of the system. These parts are widely different in different types of pumps. For instance, a totally mechanical pump may use gravity for a power source and a one-way valve to block backpressure. A simple electric pump will use electricity for power; the power will spin a wheel in the pump, which increases the force of the flowing water and allows the siphoning to work more effectively.

 

Features——Peristaltic pump

 

u Unique design  

u Low cost  

u High quality manufacturing and materials

u Simple structure, less spare parts 

u Quick tube replacement (no tools requirement)

u Cover lock for bi-directional operation 

u Quiet operation (low decibel)

u Dry turn accepted 

u High quality Silicone tubing /Pharmed BPT as standard

u Long maintenance free operation life 

u Wide customization options  

u Step motor

 

Options——Peristaltic pump

 

u Voltage (V): DC 12V, 24V

u Flow rate: according to your exact requirement

 

Customization options (Please indicate the detailed requirements)

 

u Increase the shell

u Tube length

u Tube material

u Supporting R&D equipment

u Others 

 

Deatailed Specification——Peristaltic pump