Will a negative pressure form inside the jacket of the reactor?
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During shutdown, the pressure in steam or condensable gas pipelines can become negative due to condensation； Could negative pressure be created in the jacket of that reactor after steam is introduced and then condenses? If so, how to handle it? I really didn’t notice this issue during production; I’m seeking help from everyone ；
Both drain valves and steam traps are one-way valves
Why isn’t the coil purged after it has stopped moving? And what are the hazards of negative pressure in the coil?
This can happen; the downside is that the coil gets flattened
After stopping the machine and shutting off the steam and materials, first open both the high-point vent and the low-point drain to achieve balance, then close them once the temperature has dropped.
Devices that are not designed for operation under negative pressure pose significant risks when used in such conditions; it’s like going out on the street without pants – they aren’t built to function under such circumstances. Forcing them to operate or making mistakes will only result in damage to the device, such as it being flattened or the welds cracking.
Install a vent pipe; once the steam has passed through, open the valve to balance the pressure