Reasons for the opening of the backup safety valve outlet
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This is because, after the outlet valve is closed, if there is a leak in the inlet valve, the safety valve remains under pressure, which can lead to severe material leakage and pose a serious safety risk. Is this analysis correct? Thank you
Doesn’t the safety valve outlet open? What’s the use of a safety valve that isn’t opened?
I’m referring to the backup safety valves. They are designed in pairs so as to facilitate maintenance without shutting down the system; under normal conditions, one valve is in use while the other serves as a backup. Thank you
One is in use and one is standby; the inlet of the standby valve is closed while its outlet is open.
One in use and one as backup; the inlet of the backup valve is closed while its outlet is open, as required by the design
It should be the entrance closed and the exit open, right? Is there anything the opposite of that there?
We do not use the backup safety valve. It is only put into use when the safety valve in use is inspected during the annual check.
A three-way valve is installed, with a safety valve in each of the two branches; regardless of the position of the three-way valve, one safety valve is always in use while another serves as a backup?
Are there any written design specifications or requirements regarding the respective statuses of the two safety valves and the backup system?