The automatic agent filling system uses compressed air as the power source to drive the transportation and filling of the agent. When the delivered weight reaches the set value of the agent, a signal is transmitted to the PLC processor through the weighing sensor, and the solenoid valve of the driving gas source of the agent booster pump is closed to stop filling the agent; then the N2 booster pump operates to start filling N2. When the set N2 pressure or the set N2 weight is reached, the system stops working and the filling is completed.
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