Cryogenic liquid level meter drain valve problem
Thread Content
Liquid level gauge drain valve under low temperature conditions. 1. How to solve the problems of freeze blockage and internal leakage ； 2. Which model to choose? ； 3. Are there any relevant selection standards? Can you upload a copy of the information?
Usually to solve the problem of blockage of the positive pressure pipe of the liquid level gauge, a section of elbow with a downward hook is connected to the sampling port at the bottom of the container to avoid general blockage. I don’t know what kind of equipment your low-temperature working condition liquid level gauge is. It’s best to send a picture or a schematic diagram to facilitate accurate discussion and solution of the problem.
I don’t know if the medium in the pipeline is suitable for electric heating. In addition, according to the schematic diagram, can I change it so that the liquid level measurement and sewage discharge are separated?,,, for reference.
Steam tracing can be used (the medium is not suitable for electric heating). The drain valve is not the drain valve of the tank, but a hand valve for emptying the flow meter. What I want to ask is, which model of this valve will be better, because most of the hand valves of cryogenic liquid level meters on site have internal leakage to varying degrees. You can also see from the picture that there is serious frost on the outside.
Consult Hangyang. In the early years, they had a cryogenic liquid valve equipped with a pressure spring. That is, after the valve is closed tightly, if there is leakage, the spring can continue to compress it as the temperature rises. There are also commonly used pictures.