Vacuum valve internal leakage has "know-how"
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Release Time：2019-02-14
The first step: internal leakage of gate valve. According to the calculation of energy consumption of the unit, compared with yesterday, the raw materials are the same today. If the yield decreases, besides excluding the causes of process and instrument, it is preliminarily judged that there may be internal leakage of gate valve, resulting in increased energy consumption. The second step: thermometer detection "no less". If the gate valve leaks, the temperature of adjacent subsequent pipelines will increase or decrease significantly through the thermometer. The third step: we through the first step, the second step method to check the gate valve leakage, but can not be fully confirmed, then "stethoscope" detection is very important. You can choose a screwdriver as a "stethoscope". One end of the screwdriver head is perpendicular to the pipeline, and the other end is close to your ear,
The first step: internal leakage of gate valve. According to the calculation of energy consumption of the unit, compared with yesterday, the raw materials are the same today. If the yield decreases, besides excluding the causes of process and instrument, it is preliminarily judged that there may be internal leakage of gate valve, resulting in increased energy consumption.
The second step: thermometer detection "no less". If the gate valve leaks, the temperature of adjacent subsequent pipelines will increase or decrease significantly through the thermometer.
The third step: we through the first step, the second step method to check the gate valve leakage, but can not be fully confirmed, then "stethoscope" detection is very important. You can choose a screwdriver as a "stethoscope". One end of the screwdriver head is perpendicular to the pipeline, and the other end is close to your ear. Listen carefully to whether there is a "thorn" abnormal sound in the pipeline. If there is, you can judge the leakage of the gate valve here.
According to these three steps, it is basically possible to accurately determine whether the gate valve is leaking!
The method of determining the internal leakage of the valve is: the valve is closed 4-6After hours, measure the valve stem with an infrared thermometer(Near the valve body)or downstream of the valve body150mmThe metal temperature at, if greater70C, then identified as "internal leakage". This judgment method is applicable to most of the inner leakage valves. Some valve internal leakage determination should also be used in other ways, according to the specific situation to determine the internal leakage.
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