Problems with nitrogen breaking the vacuum
Thread Content
Currently, under certain operating conditions, this processing equipment requires vacuum pumping. Before discharging the material, nitrogen must be introduced to break the vacuum; the nitrogen pressure is 0.3 MPa. The design pressure of this equipment is 0.09 MPa. During normal operation, the pressure gauge reading is monitored, and once the pressure drops to a slight positive pressure of 0.05 MPa after breaking the vacuum, the nitrogen valve is closed. I would like to ask whether nitrogen needs to be depressurized before entering the process equipment. If too much nitrogen is introduced due to a misoperation, there is a risk of overpressure in the process equipment. However, if the nitrogen pressure decreases, the time required to break the vacuum will increase. How does everyone design the use of nitrogen to break vacuum? Must the nitrogen pressure to break the vacuum be lower than the design pressure of the equipment?
This post was last edited by Qingchengjun on 2022-9-5 at 10:15. It has little to do with \"breaking vacuum\"; understanding its application scope in terms of container stamping makes it more applicable. Pressurizing sealed containers requires safety valves or burst discs, and for larger containers, it is better to install pressure monitoring and relief devices for easier operation. If the container is relatively small, it is more appropriate to control the pressure at the gas source side.
It is recommended that you install a nitrogen purge valve along with a shut-off valve; this will ensure greater safety. The rate at which the vacuum is broken depends on the diameter of your pipe—the larger the pipe, the faster this process will be~~
OP, how do you guys manage to achieve this lousy vacuum state? I’d appreciate some guidance
It is recommended to install a pressure reducing valve, a pressure gauge, and a safety valve to reduce the pressure to 0.09 MPa.
There must be a pressure relief device; the design institute should design one that allows nitrogen to be introduced directly to break the vacuum, otherwise the equipment won’t be able to handle it