Will liquid accumulate in the buffer ring below the pressure gauge? Check whether the pressure display error is within the allowable range
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Question: 1. In actual production use (where the medium being measured is a gas containing certain condensable components such as water vapor), will liquid accumulate in the condensation chamber below the pressure gauge (indicated by the red arrow), and will the liquid level be at the height indicated by the green arrow? 2. After checking relevant information: The condensation ring, also known as a pressure buffer tube, serves to cool the medium being measured and to smooth out pressure fluctuations. When measuring the pressure of liquids, vapors, or condensable gases at temperatures above 60°C, the pressure gauge’s sensing element should be equipped with a ring-shaped condensation ring or a U-shaped condensation bend. Are there any other situations in which a condensation ring is used?
It is possible for the water vapor in the medium to condense and accumulate at the green line.
1. In the case of water carried in the air, the condensation that the original poster mentioned occurs, reaching the green line. In practical operations, a three-way valve is usually used in place of the ball valve shown in the diagram. The advantage is that when there are abnormalities such as the pressure gauge needle fluctuating erratically or not moving at all, it is possible to open the three-way valve and use the pressurized gas in the system to flush the elbow pipe. Of course, safety must be taken into consideration during this operation. After all, some gases are corrosive under high temperature and pressure. 2. In practice, these two are the most common. As a reminder, when in an outdoor environment, care should also be taken to prevent the buffer tube from freezing.