Process Engineering Division – Instrumentation and Automation Technology Exchange Forum – Daily Question – Question No. 2020-01-08
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Process Engineering Section – Instrumentation and Automation Technology Forum – Daily Question – Question dated 2020-01-08: There is a small hole on the back side of the casing of some pressure gauges. What is the purpose of this hole? Answer: When a pressure gauge is used to measure gases or toxic liquids, there is a safety vent on the back of its casing (covered with rubber). In this way, when the Bourdon tube or connections leak or get damaged, the pressure inside the case will push open the safety valve, preventing the pressure from breaking through the front glass and causing injury.
When a pressure gauge is used to measure gases or toxic liquids, there is a safety vent on the back of its casing (covered with rubber). In this way, if the Bourdon tube or connections leak or get damaged, the pressure inside the gauge case will push open the safety valve, preventing the pressure from breaking through the front glass and causing injury.
When a pressure gauge is used to measure gases or toxic liquids, there is a safety vent on the back of its casing (covered with rubber). In this way, when the Bourdon tube or connections leak or get damaged, the pressure inside the case will push open the safety valve, preventing the pressure from breaking through the front glass and causing injury.
It indicates that the gauge reading is \"gauge pressure\"
When a pressure gauge is used to measure gases or toxic liquids, there is a safety vent on the back of its casing (covered with rubber). In this way, when the Bourdon tube or connections leak or get damaged, the pressure inside the case will push open the safety valve, preventing the pressure from breaking through the front glass and causing injury.
When a pressure gauge is used to measure gases or toxic liquids, there is a safety vent on the back of its casing (covered with rubber). In this way, when the Bourdon tube or connections leak or get damaged, the pressure inside the case will push open the safety valve, preventing the pressure from breaking through the front glass and causing injury.