If you have ever used a capillary pump, you may have wondered how to choose the correct tube for your specific application. While there are many different factors to consider when selecting capillary tubing, there are some basic principles that should be followed when you're shopping for tubing. If you're unsure of which type to choose, check out this guide to capillary tube selection. It's helpful for any pumping system, including blood collection systems. In most cases, capillary tube systems require a precise charge of refrigerant. The wrong charge could create a serious imbalance in the system and damage the compressor. If you're unsure of the correct amount of refrigerant to use, consult the manufacturer or use a sizing chart to determine the correct amount. Most tubes are sized by the manufacturer and will have a nameplate that will tell you exactly how much refrigerant to use. The amount is usually measured in tenths of an ounce. When you're shopping for capillary tubing, make sure you choose one that has an internal seal. The external surface of the tubing is not sealed with a plug. Capillary tubing can be clogged if the interior is too humid, but these tips from this site will help you avoid this problem. Choosing the right capillary tubing is important to your overall success. Just make sure to select the right one for your application. Selecting the correct capillary tubing for your application is crucial to the performance of your HPLC equipment. Select tubing with the right internal diameter and smooth surface on: www.chromtech.com, to reduce turbulence and maintain the proper pressure difference in your system. It's also important to choose a concentric tube for chromatography since it minimizes tube volume and maximizes sampling efficiency. A smooth bore limits the Newtonian flow through the sample loop, resulting in a better sample read. Selecting the right capillary tubing will ensure that the temperature remains consistent throughout the entire process. For example, if you are working with a liquid, you can use a d=1.1 mm capillary tube. This tube has a d=1.1 mm geometry and a maximum pressure drop of 16 bars, which corresponds to a subcooling of 15 K. A corrective valve remote bulb will automatically correct for a high superheat. Capillary tubing can also be used for cooling systems. Choosing the right tube depends on the size and type of the system. Small single-compressor/single-evaporator systems typically use capillary tube. However, capillary tubes may also be used in larger systems. For this reason, it is recommended that you check the pressure rating of the tubing before purchasing it. However, this doesn't guarantee that the tube will perform to your expectations. You can get more enlightened on this topic by reading here: https://en.wikipedia.org/wiki/High-performance_liquid_chromatography.
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