Peristaltic Pump export produces dripping phenomenon: when we were in use, when the peristaltic pump stop, often like the liquid in the pipeline as the pump stop also immediately downstream, but with pseudo, we often find that liquid pipeline will drop down slowly, until dripping droop of the liquid in the pipe after the stop flow. This is a big problem when we use peristaltic pumps as quantitative tools. How does this drip happen? Peristaltic pump engineer will tell you, this is a normal phenomenon of liquid flow, the main reason is that the liquid at work is full of sag in the export pipeline, but when the pump stops, export pipeline in the liquid because of its gravity and ductility, will follow the export natural drip edge, until all the liquid drip off the drooping line will stop. In addition to the liquid weight dripping, peristaltic pump will produce a siphonage phenomenon? The answer is no. Because of the working reasons of the peristaltic pump, the runner needs to completely press the pump tube during the working process of the peristaltic pump, so that the inlet end can produce negative pressure and the outlet end can produce positive pressure. Therefore, when the peristaltic pump stops running, the inlet and outlet are completely shut off. Therefore, although the outlet pipeline is sagging, the whole Peristaltic Pump Hose will not produce a siphon phenomenon. We know the reason for the liquid dripping in the peristaltic pump outlet pipeline, how to solve it? Peristaltic pump answers and analysis is as follows: the fluid in the pipeline because of its gravity will fall, but the liquid due to full of line, since only one end of the line and the atmosphere are interlinked, the other end of the peristaltic pump wheel crushed with the atmosphere, the liquid in the pipe can produce tension, but because of the tension is unable to overcome the gravity of the liquid, so the liquid will drip. Even though we know that the liquid tension in the pipeline is too small, is there a way to expand the tension, can overcome the gravity? Yes, of course, we can easily increase the tension of the liquid in the pipeline by reducing the diameter of the outlet of the pipeline, to solve the phenomenon of liquid dripping. Of course, in addition to this simple method, we can also increase the one-way pressure valve at the outlet to solve the dripping phenomenon. When the pump works, the pressure generated by the pump itself will open the one-way valve, and when the pump stops, the pressure will disappear and the one-way valve will automatically close. Problems need attention in the practical work: as the peristaltic pump pulse phenomena exist in the process of running, i.e. peristaltic pump fluid delivery time will be reduced in the liquid flow in the pipe due to pulse suddenly formed the smoke and back to the suction phenomenon, so we set the export of small-diameter pipeline length must be more than the length of the peristaltic pump to suck. Because the small diameter is set too small, the liquid outlet liquid level in the pipeline does not stay in the small-diameter pipeline because of pumping back, the larger tension of the liquid is not formed, and it will not play the role of dripping prevention naturally. Liquid tension anti-drip also has its limitations, because the liquid itself will be vaporized over time, so if you need liquid anti-drip for a long time, then it may be ineffective with evaporation, so if your system will often be used for a while to a long time after shutdown, Then complete the fully closed check valve system is the best solution.
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