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As two kinds of equipment for precision fluid transmission, syringe pump and stab pump are used more instruments. Due to the wider application industry, its models are also diverse. Some users are often unable to distinguish what to pay attention to when selecting the two types of equipment and what the difference is when using this equipment. The following will explain for you.
The difference in working principle of laboratory syringe pump and peristaltic pump
The difference in working principle lies in the different ways of entering auspiciousness between the two. The syringe pump is used to inject and extract the liquid through the movement of the plug (injection and then extraction, first extraction and then injection, continuous circulation): generally more accurate than peristaltic pumps , The operation is simpler. The peristaltic pump uses a roller to squeeze the silicone tube of the peristaltic pump, and uses the elasticity of the hose to promote the pressure at the inlet of the silicone tube to show a negative pressure, so that the liquid is filled with the silicone tube to achieve the purpose of transporting the liquid.
The difference between the two selections
Syringe pump syringe: It is one of the main components of the syringe pump. Before choosing, you must know the amount of liquid you need to inject, how many milliliters you need to inject at a time, and then determine the specifications of the syringe.
Driver: Determined according to the wave body that needs to be transported and the function mode that needs to be used. For example: the distribution mode of the liquid, under what environment it is used, multi-channel injection or single-channel injection, whether there is a requirement for liquid flow rate, and what is the accuracy of each injection. Peristaltic pump flow selection: Flow is one of the important elements for selecting pump models. Different flow rates correspond to different pump heads and hoses.
Silicone tube selection: There are many kinds of hoses used in the motion pump, most of the transmitted wave body can be used to beat the pump silicone tube, but some liquids have special chemistry, so you must look at the liquid when you choose. Chemical properties, liquid temperature and requirements for suction range.
Peristaltic pump pump head: The pump head is also more important as one of the three major components of the peristaltic pump (the other two are the driver and the hose). When selecting the pump head, in addition to paying attention to the flow rate mentioned above, you should also consider replacing the silicone tube. Whether it is convenient, whether there is a need for multiple channels, whether there are special requirements for the working environment, etc.
Drive: Drive is the power component of the pump. The higher the speed, the larger the flow. This is different from syringe pumps because their working principles are different. The driver on the peristaltic pump needs to pay attention to whether some special functions are needed, such as speed adjustment, flow adjustment, distribution mode, etc. Another point is similar to the syringe pump, that is, the requirements of the working environment, whether there are requirements for dust, water, explosion and explosion.
How to improve the service life of peristaltic pump
1. Loosen the pressure block when the pump is not working can prolong the life of the pump tube. The pump uses the peristaltic pump head rollers to repeatedly squeeze the hose and the natural rebound of the hose to produce suction to achieve fluid delivery. If you want to maintain the longevity of the pump tube, when the pump is not in use, try to lift the pressure block of the pump head to make the pump The tube is in a natural uncompressed state, thereby prolonging the life of the pump tube.
2. When selecting the model, under the premise of meeting the requirements of the customer's meteor, the pump speed should be reduced to less than 300 revolutions as much as possible. The meteor of the peristaltic pump is produced by the rotation of the pump head roller. The faster the rotation, the shorter the service life of the pump tube. When you want the pump tube to be used for a longer time, you can choose a relatively large tube diameter to reduce the pump.的rpm。
3. Dart-moving pump pipes are used on the pump head, and ordinary constant-flow pump pipes are used for the other connecting pipes. Extrusion tubes used in peristaltic pumps require good compression, resilience, and tear resistance. Therefore, the material purity of these pump tubes is relatively high, and the wall thickness and shape accuracy are high, which will result in higher prices for peristaltic pump tubes. Therefore, the peristaltic pump adopts pipes to ensure the service life, and the connecting pipes use ordinary pipes, which makes the whole system more economical and applicable.