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How to drain liquid nitrogen tank waste

When draining the self-pressurized liquid nitrogen tank, the boosting valve and the inlet/discharge valve are open, and only the vent valve is closed.

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When draining the self-pressurized liquid nitrogen tank, the boosting valve and the inlet/discharge valve are open, and only the vent valve is closed. After the liquid discharge is completed and no pressure is needed, the booster valve will be closed and the inlet/discharge valve will be closed at the same time. However, there is still residual pressure and liquid nitrogen inside the tank at this time. To ensure the safety of the tank, this part of the pressure must be discharged. , the correct way is to open the vent valve. The same goes for waste liquid discharge. Keep the vent valve open. When the pressure is released, the waste liquid will also be discharged to keep the pipeline open.

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