Liquid nitrogen refueling filling system

Liquid nitrogen filling machine is an ultra-efficient nitrogen injection system designed for production lines ranging from low-speed to high-speed. It precisely injects liquid nitrogen into each container, featuring a no-container-no-nitrogen function. The injected liquid nitrogen immediately vaporizes into internal pressure, achieving pressurization and deoxygenation requirements.

The programmable logic controller (PLC) uses a German Siemens PLC, and the human-machine interface is a 7-inch touchscreen, allowing for control of filling time and volume.

Vacuum – (below 1×10⁻⁵ mba) All piping uses vacuum-insulated hoses, ensuring zero-frost operation.

Insulation – Ultra-low daily evaporation reduces operating costs.

Protection – Nozzles are protected by dry nitrogen positive pressure and equipped with external heaters to prevent external air from entering and causing frost or ice blockage inside the nozzles, achieving true zero-freezing.

Safety – Liquid nitrogen level is monitored by a differential pressure level gauge, and the PLC controls the opening and closing of the inlet solenoid valve to maintain a stable liquid level and improve filling accuracy.

Automatic Adjustment – By reading the speed of the filling and sealing machine, multiple preset programs can be configured to automatically compensate for and adjust the filling volume.

Simple Operation – A simple user interface allows for proficiency after debugging by professional engineers and simple training for your personnel.

Purity – Equipped with a gas-liquid separator to ensure pure liquid nitrogen at the outlet.

Automation – Features automatic tracking of the filling and capping machine's speed and position.

Long lifespan—Advanced scientific inlet valve design with air seal and high-pressure protection automatic venting function extends the machine's service life.

Micro-volume filling technology—Maintains consistent and accurate nitrogen injection at all production line speeds.

Minimum number of vulnerable parts—Major components are manufactured using imported or in-house processes, minimizing failure losses.