What is the function of the capillary in a single-flange pressure transmitter?
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As the title suggests, what is the function of the capillary in a single-flange pressure transmitter? In what situations is no capillary used, and in what situations is one used?
A capillary can extend your gauge head to facilitate observation; it is generally used in situations where the installation location is difficult to reach, allowing the gauge head to be extended to a position where it can be easily viewed
The main function of the capillary is to provide isolation together with the diaphragm. Transmitting pressure, that is, pressure guidance. Depending on the location of the process equipment and instruments, determine the length of the capillary as needed
Ordinary capillaries can be used in all situations. However, due to price considerations, it is generally used mainly in environments involving corrosive media. . Not all flange diaphragms have capillaries on their surfaces. But those with capillaries are definitely diaphragm flange type. .
Capillaries serve to transmit pressure and isolate the medium; they are used in transmitters for measuring corrosive media, but not in other situations.
Generally, the decision of whether to include a capillary is made based on the installation location, the vibration of the equipment pipes, the surrounding environment, and the physicochemical properties of the materials.
As an additional note, for materials at high temperatures, capillary types can also be used to prevent damage to the gauge
It mainly depends on the medium. If the medium doesn’t cause any damage to the instrument, then it’s not a problem. But if there is corrosion, as mentioned earlier, high temperatures, or even toxicity, those factors also need to be taken into consideration. After all, the capillary tube is directly connected to the pressure-taking point via a flange, so leaks are less likely to occur.
For media that are prone to solidification, clogging, crystallization, or are toxic, capillaries are generally considered to use in order to reduce the need for heat tracing.
For media that are prone to solidification, clogging, crystallization, or are toxic, capillaries are generally considered to use in order to reduce the need for heat tracing.
Silicone oil is generally used in capillaries to transmit pressure