Selection and difference of syringe pump and peristaltic pump

May 28, 2023

Syringe pump selection guide

a. Select a syringe
Determine the size of the syringe to use based on the amount of liquid dispensed.

b. Select the drive
Fluid distribution application mode
Use environment and installation form
Choose multi-channel or single-channel drive
Liquid flow rate and injection accuracy

Peristaltic pump selection guide

a. Select a hose to consider
flow
Determine the material of the hose according to the chemical nature of the fluid
Fluid temperature versus temperature for hose requirements
Suction requirements
Hose life

b. Select the pump head to consider
Select the appropriate pump head according to the reference flow rate
Can you quickly change hoses?
Is there enough channel number to spare?
Effect of removed liquid on pump head material
b. Selecting a drive needs to be considered
The higher the drive speed, the greater the flow rate and vice versa
Fixed or adjustable speed, flow correction, flow distribution, etc.
According to the use environment, whether the drive has sealing, dustproof and waterproof requirements

The difference between syringe pump and peristaltic pump

The difference between the peristaltic pump and the syringe pump is that the injection mode of the two is different. The syringe pump sucks or discharges the liquid through the movement of the piston like an injection. Generally, it is more accurate than the peristaltic pump, and the operation is relatively simple. The peristaltic pump uses the elasticity of the rubber tube to absorb or remove the liquid, and there is a problem that the accuracy of the hose is deteriorated due to aging.

Advantages of the syringe pump:
Injection injection accuracy is an order of magnitude higher than that of a peristaltic pump injection, enabling automatic calibration of standard curves and improved productivity.

Disadvantages:
1 The injection unit wears faster, and if the sample volume is large, the service life is short. The quality of domestic injection units is relatively poor, and the cost of imports is relatively high.
2 injection injection pipeline is more complicated, resulting in easy pollution, memory effect is relatively large, the difficulty of cleaning is difficult
3 injection injection system If the introduction of air bubbles in the suction tube remains in the tube, it is generally difficult to completely eliminate, and the injection is not accurate, especially the position of the multi-position valve and the sample ring, especially easy to store bubbles.
4 reagent consumption is not less than intermittent flow injection. The working procedure of the syringe pump is to perform a measurement procedure first, followed by a cleaning procedure. In fact, the cleaning procedure consumes a lot of reagents. You can set up the cleaning process yourself. If you are worried about not achieving the cleaning effect, you can only use the default cleaning program.

Advantages of peristaltic pumps:
The structure is simple, the maintenance is convenient, and the cost is low. The consumable parts are pump tubes. If you pay attention to silicone oil, you can usually use it for about 2 years.

Disadvantages:
Injection is not as accurate as injection. Because there are many unstable factors in the peristaltic pump injection, the first is that the peristaltic pump motor is affected by the voltage instability, causing the rotation to be not constant. Secondly, the compression degree of the pump tube will cause the injection volume to change.

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Författare:

Mr. Bruce Tang

E-post:

bruce.tang@macxipump.com

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