As two kinds of equipment for precision fluid transmission, injection pump and Peristaltic Pump are used more instruments, some users often can not distinguish what is the difference, the following xiaobian will answer for you in detail! Injection pump and peristaltic pump working principle of the difference The difference between the peristaltic pump and injection pump is that the injection mode between the two is different. The injection pump is used to inject and extract the liquid through the movement of the piston (injection after extraction, extraction after injection, continuous circulation). Generally more accurate than peristaltic pump, simple operation. The peristaltic pump is to uses rollers to squeeze the silicone tube of the peristaltic pump and uses the flexibility of the hose to promote the pressure at the entrance of the silicone tube to present negative pressure, to fill the silicone tube with liquid, to achieve the purpose of conveying liquid. Differences in selection between the two The injection pump Syringe: it is one of the main parts of the injection pump. Before choosing, you should make clear how much liquid you need to inject, how much ml of the injection pump is, and then determine the specifications of the syringe. Driver: Depending on the liquid to be delivered, and the functional model to be used. For example, liquid distribution mode, what environment to use, multi-channel injection or single-channel injection, whether the flow rate of liquid is required, the accuracy of each injection. Peristaltic pump Flow selection: flow is one of the important factors in choosing the pump model, different flows correspond to different pump heads and hoses. Silica gel tube selection: there are many kinds of hoses used by a peristaltic pump. Most of the liquid transmitted can use silica gel tube, but some liquid has special chemical properties, so it depends on the chemical properties of the liquid, the temperature of the liquid, and the requirements of the suction range when choosing. Peristaltic Pump Head: the pump head as one of the three parts of the peristaltic pump is also more important (the other two are the driver and hose). When choosing the pump head, in addition to paying attention to the flow mentioned above, it is also necessary to consider whether it is convenient to replace the silicone tube, whether there is the need for multiple channels, and whether the working environment has special requirements. Drive: Drive is the power component of the pump, the higher the speed, the greater the flow. This is not the same as injection pumps, because they work differently. The actuators on peristaltic pumps also need to be aware of the need for special functions, such as speed regulation, flow regulation, distribution mode, etc. Another point is similar to the injection pump, that is, the requirements of the working environment, whether there are dustproof waterproof explosion-proof requirements. Peristaltic pump and injection pump advantages and disadvantages comparison Peristaltic pump advantages: simple structure, convenient maintenance, low cost. Easy to consume is the hose, usually pay attention to maintenance, generally can be used for about 2 years. Disadvantages: Injection is less accurate than injection. There are many unstable factors in peristaltic pump sample injection. Firstly, the motor of the peristaltic pump is affected by voltage instability, resulting in unstable rotation. Secondly, the pressure degree of the pump tube will cause the change of sample injection quantity. Advantages of injection pump: injection precision is one order of magnitude higher than the peristaltic pump, can realize automatic preparation of standard curve function, improve work efficiency. Disadvantages: The syringe wears quickly and has a short service life. In addition, if the air is inhaled, the syringe will remain in the tube, which is difficult to eliminate, and the injection volume will be inaccurate.
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