Comparison of the advantages and disadvantages of Verabar and Venturi tubes for measuring air
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Recently, a new device was installed on the DN1000 pipe at the blower outlet. During the communication process with the design institute, we had doubts about whether to use Verabar or Venturi tube measuring components. Please share your experience and ideas on this issue and brainstorm to help me solve the problem. Thanks!
It is recommended to use a venturi, because the venturi is suitable for measuring liquids and gases with large diameters, and there are no excessive requirements for installation. However, when using Verabar, the pressure hole is sometimes blocked, especially under the following circumstances:: 1. When the pressure tube leaks and the high-pressure area of the probe is damaged, the smaller diameter particles among the impurities may enter the pressure hole. ； 2. When the pipeline is out of production, small impurities may enter the pressure hole due to Brownian motion of molecules. ； 3. When the system is turned on frequently, small impurities may enter the pressure hole at the moment when the high pressure zone is formed. Over time, it may cause the probe to become blocked. ； 4. The medium contains a large amount of tar, algae, or fibrous substances, which may also cause clogging of the probe.
What does it mean upstairs? I won’t let you read the reply. Verabar seems to be more expensive than Venturi. Small pressure loss and high precision. Measuring these low-precision things only needs to meet the requirements. The key is to unify the whole factory.
Maybe I didn't describe it clearly enough to make you think there's something to argue about. The air flow rate is the core parameter of the device, and the concentration ratio mixed with the main raw material is the lifeblood of the device production. Therefore, I hope to choose a high-precision measuring element and optimize the operation method, but its maturity is obviously different from that of the Venturi. From the perspective of long-term operation, there is no way to verify the accuracy after the Venturi tube is installed, while the Verabar can be removed for verification, so it is difficult to finalize it. “What does "reply not allowed to be read" mean? ?
Situation I encountered: It is also a large diameter, air, high temperature, 900 degrees. There is no suitable material for Veraba, so you can only choose a venturi tube.
For a pipe with such a large diameter, it is recommended to use a uniform velocity pipe.
Venturi is more accurate and reliable. It is the standard throttling device and is recommended first. However, it is too long, inconvenient to install, and costly. Verabar has average accuracy, good linearity, easy installation and low cost. If used for metering we recommend Venturi, if used for control, energy consumption calculations and on-site settlement we recommend Veraba.
This post was last edited by kate1217 on 2012-11-28 16:37. What is going on? You can’t see everything upstairs:o From the second floor to the eighth floor, it’s all “This post is only visible to the author.””
Design institutes choose Verabar, and owners choose orifice plates?