Industry new

Mass Flow Controller Applications - Gas Distribution - Focus on Microfluidic Control Technology

Gas distribution is a science that presents new challenges. Using the right equipment can do more with less. After all, unsatisfactory gas distribution will affect the follow-up products. Understanding the role of each component within a distribution system device can help improve the overall process. This article will start with the source of gas from Zui, list some of the problems that you may encounter and give suggestions to help you set up the gas distribution process more reasonable and effective.
Many applications choose project sites for gas distribution because the purchase of customized gas mixtures from gas suppliers is quite expensive. Purchasing only pure gas not only reduces the cost, but also allows the user to adjust the composition percentage of the component gas at any time according to the application requirements, which greatly increases the convenience. In addition, for the sake of safety, the customized gas mixture must be transported and stored by special steel cylinders. After use, the cylinders are not allowed to be easily disposed of, and sometimes even must be returned to the gas supplier according to regulations. Where are these bulky cylinders placed? Unused cylinder gas mixture will cause gas stratification after a long period of time. The dense gas will be at the bottom of the cylinder and the low density gas will accumulate on the cylinder. If you use a variety of pure gas for gas distribution, you don't need to flip the entire cylinder up and down before each use.
The use of the Erikat Mass Flow Controller to control the flow of each pure gas source individually allows for rapid gas distribution and precise control of the percent composition. You need to measure the mass flow rate of a certain mixture of gases. Regardless of the directly purchased cylinder gas mixture or on-site configuration, you can use COMPOSER gas editing software to store the components of the gas mixture and their respective proportions in the Erikat Mass Flow Controller. .
In a dynamic system, the mixing ratio of the mixture may not always be 75% A gas + 25% B gas. If this mixture ratio is adopted today, the next day will be changed to 25% A gas + 75% B gas, and then changed again. What should I do with 50% A gas + 50% B gas? Considering the proportion of gas distribution that may be used in the future to determine the range of the measurement range is very important before purchasing the mass flow controller for the gas distribution project. The Erikat Mass Flow Controller presets 98 to 128 commonly used gases, allowing users to switch on-site at any time, eliminating the need to purchase multiple mass flow controllers that are limited to a single gas, significantly saving your acquisition costs.
After controlling the gas flow, the next step is the precise mixing. If it is not possible to design the pipe to have enough right-angled turns, static mixing is recommended. The use of right-angle pipe mixing allows the gas to move turbulently, allowing uniform mixing in advance. The tubing is connected to the outlet end of the mass flow controller.
Many gas distribution systems come with an analyzer that updates mixture data in real time. If the mixing ratio is inaccurate, the analyzer will trigger a light alarm or alarm horn to alert the technician that the percentage of components of the mixture gas is not acceptable. If you know the type of gas you are working on, the built-in gas analyzer is not a good option because the gas analyzer is calibrated with a single gas. Or your funds are sufficient, you can also use mass spectrometry, which can detect all the ingredients in the sample gas. In some real-time gas distribution applications, maintaining continuous pressure is very important. For example, in welding applications, the loss of protective gas pressure will result in sub-optimal welding because the shielding gas is used to protect the welding workpiece from the atmosphere. The reason why the shielding gas loses pressure is because the gas in the distribution system is less than 100%, and it may also be affected by the start and stop of multiple welding machines. A pressure feedback system (usually containing a pressure controller, a pressure gauge, or a single Erikat mass flow controller that can be switched to pressure control mode) controls each welder at a fixed pressure At the same time and flexible control of the increase or decrease in traffic.
Using a buffer tank or a stable volume can alleviate the problem of pressure loss, a bit like an air reservoir, where the gas is stored until the gas mixture is used. The issue of pressure control will also be attributed to the selection of an appropriate range of mass flow controllers because it must be ensured that the mass flow controller's effective operating range covers the peaks and valleys of the flow that occur under all possible conditions.
software
Proper air supply, precision mass flow controllers, and pressure gauges can create a precise, fast air distribution system. You may also need something to control all components at the same time. In most cases, you can write a software program on the distribution site to solve all problems. However, Eric Carter's simpler solution, Flow Vision MX, a dedicated gas distribution software, can simultaneously connect 10 mass flow controllers to control different gas distribution routes, and an Elicat pressure Measure the instantaneous pressure. If you need to integrate instruments or devices that are not compatible with the Flow Vision MX software in the distribution system, you can download the LabVIEW driver to control the entire distribution system through LabVIEW.

PREVIOUS：Detu Professional Flue Gas Analyzer Product BNEXT：Mass flow controller becomes a new generation