What is the function of the pressure gauge buffer tube? Principle? Urgent! Urgent! Urgent! ! !
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1. What is the function of the pressure gauge buffer tube? 2. Why is there a buffering effect, and what is the principle behind it? 3. May I ask if a buffer tube can be used with diaphragm pressure gauges (for corrosive media)? 4. If a buffer tube is used for gases that are prone to condensation, and the steam condenses into water before being measured by the pressure gauge, will this affect the measured pressure?
1. The pressure buffer tube is used to reduce fluctuations in the gauge reading caused by fluid instability. 2. The buffer tube is a circular pipe that helps to eliminate instability through its operation. As for points 3 and 4, experts have already answered them; I don’t have much experience with them.
1. What is the function of the pressure gauge buffer tube? Protection against the impact of sudden increases in buffer pressure on pressure gauges, as well as isolation from high-temperature media. 2. Why is there a buffering effect, and what is the principle behind it? The pressure increases suddenly, the flow rate of the medium rises abruptly, and its kinetic energy increases. However, due to the circular or semi-circular structure of the buffer tube, pressure losses occur, which reduce the flow rate of the medium and lower its kinetic energy, thereby serving to protect the pressure gauge. 3. May I ask if a buffer tube can be used with diaphragm pressure gauges (for corrosive media)? Sure. 4. Regarding gases that are prone to condensation, if a buffer tube is used and the steam condenses into water before being measured by the pressure gauge, will this affect the measured pressure? No, the pressure gauge with a buffer tube is installed at the top, so the condensate does not affect the pressure gauge; however, the condensate can serve as an insulating layer.
Fourth, with a buffer tube, what problems can arise if condensate water accumulates inside it?
If it is water, it will freeze in winter; therefore, straight pipes or 90-degree elbows are generally used, with heat tracing and insulation provided if necessary. The impact on the measured pressure can be ignored.
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No cases of damage due to freezing have been observed with buffer tubes installed on steam equipment and pipelines
Since diaphragm pressure gauges are used, it means that the material in question is highly corrosive. Buffer tubes are generally made of carbon steel or stainless steel; therefore, locations where diaphragm pressure gauges are used are usually not suitable for installing buffer tubes