The liquid filling process includes several key steps: preparation, container cleaning, material preparation, filling operation, sealing, packaging, and quality inspection.
The filling machine is a material feeding system that can operate independently or be linked with other equipment.

• Preparation: Equipment check - ensure the equipment is clean and all parts are operating normally.
• Material preparation: Pour the liquid material to be filled into the storage tank.
• Filling operation: Set the filling weight, and after conducting a test with an empty bag to meet the standards, connect it for production.

There are four main types of liquid filling machines:

• Volumetric Filling Machines (Cylinder/Servo Electric Drive)
• Flow Meter Filling Machines (Diaphragm Pump, Rotor Pump)
• Vacuum Filling Machines
• Integrated Liquid Filling Systems

Liquid filling machines can handle a wide range of liquids, from thin solutions to highly viscous substances, including beverages, juices, detergents, dish soap, laundry detergent, body wash, shampoo, sauces, tomato sauce, mayonnaise, soups, oils, and more.

Operators are responsible for sorting packaging materials (if needed), cleaning and lubricating the equipment, and clearing any blockages. They monitor the machine's operation and perform maintenance or report issues as necessary. Operators must ensure that the packaged products meet safety and quality standards.

• The liquid material is conveyed through a feed pipe to the metering device.
• Packaging material is placed into the pouch forming machine, and the empty pouch is sealed using a heat sealing device.
• The empty pouch is pulled to the filling nozzle by the traction device, and the measured liquid is injected into the pouch.
• The filled pouch is sealed with a heat sealing device, and date and batch numbers are printed.
• The completed pouches are ejected through the discharge outlet and are either collected or transferred to the next stage in the process.

The production speed of packaging machines varies. For example, small machines can produce 30 to 60 bags per minute, while high-speed models can exceed this range, reaching 80 to 100 bags per minute (commonly used with vacuum machines).

Liquid filling machines are versatile and can accommodate various container sizes and shapes. Adjustable settings and interchangeable parts enable quick and easy switching between different container types, improving production flexibility.

• For magnetic pumps: Remove the filling hose and try filling liquid directly into the pump. Repeat 2-3 times, then reattach the hose.
• For diaphragm pumps: If there is air in the filling hose, press the jog button or manually pump out the air to ensure the hose is filled with liquid.
• For peristaltic pumps: Check whether the valve is closed.