Are there valves available for pressure vessels that can prevent negative pressure inside the equipment? Similar to the reverse action of a safety valve
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Are there valves available for pressure vessels that can prevent negative pressure inside the equipment? Similar to the reverse action of a safety valve
Breather valve. When class A liquid storage tanks undergo thermal expansion and contraction, nitrogen needs to be added or removed through breather valves
There is 6 kilograms of positive pressure inside the container; can the breathing valve withstand such positive pressure?
There is a positive pressure of 6 kilograms inside the container; so why worry about negative pressure? Just install a pressure sensor and set up a feedback mechanism – if the pressure drops, use process adjustments to restore it. Is this container constantly fluctuating between a slight negative pressure and 6 kilograms of positive pressure?
Yes, to prevent excessive negative pressure; we’re looking for a more cost-effective solution. So check to see if there is such a valve
If that’s the case, then it may be necessary to make adjustments to the process. It is reasonable to try to change from a higher positive pressure to a lower one, with such repeated changes. If there are frequent repeated changes from positive pressure to negative pressure, the direction of the forces acting on the container also changes repeatedly, which can easily lead to metal fatigue and pose a risk of accidents.
The breathing valve is named based on its function; a model made of metal that can handle 0.6Mpa is completely fine. There’s no need to worry about negative pressure, as air intrusion can be prevented through proper sealing. If there is concern about the lining material peeling off, then the negative pressure needs to be controlled. If there are no other hidden risks, the ultimate vacuum level is -0.1 Mpa; there’s absolutely no need to worry about metal containers
Pressure interlock. Two pressure gauges can be installed on the container; once either of them reaches the set negative pressure threshold, it will trigger the valve to supply nitrogen or air, and at the same time it will cause the evacuation process to stop automatically
If the medium is not sensitive to air and poses no hazards, the simplest solution is to install a one-way valve connected to the atmosphere, so that air will flow in automatically when a vacuum is created
The process flow must be described in detail, including the pressure changes throughout the production process and the properties of the materials; otherwise, it is impossible to provide a solution.