Everything you need to know about Liquid filling machine

A liquid filling machine is something that most people are familiar with, but getting the proper model can be challenging. Liquid filling machines will be explained in detail so that you can choose the best one for your production line and maximize output.

Inevitably, various liquid filling machines have distinct characteristics. It’s not the same as filling a toothpaste tube to fill a bottle of wine. The liquid filling machine required for cosmetics and pharmaceuticals’ small containers is distinct from that required for chemicals’ large drums.

Types of Liquid Filling Machines

Most important is the level of automation required because a large factory that produces mass quantities of products requires more complex technology than a small business that makes one or two products.

Automation of Liquid Filling Machines

When using an automatic bottle filling machine, there is no need for human intervention. The user can customize the machine’s speed, volume, and container type. A semi-automatic machine requires human intervention, such as moving containers into and out of the filling area.

In manual machines, the containers are placed, and the filler is operated by hand before the filled container is removed. They are ideal for small businesses because they don’t require a power source.


In addition, you can distinguish inline/linear versus rotary machines. Containers are sequentially filled as they travel down a conveyor belt on an inline filling machine, which saves time and money. As a result, they can be used for various products and containers. However, rotary machines are more expensive and more specialized for specific products and containers, but they are more efficient and can integrate bottle cleaning and capping technology.

Work of a Filler Machine

Filling machines of all kinds adhere to the same basic principles. Automatic systems use conveyors to move containers through the machine, where the machine then fills them. But the precise filling technology depends on the liquid’s properties, the type of container, and the desired filling precision.

Type of Filling

However, the most challenging part of filling involves pouring the correct amount of liquid into a container. That is the most critical stage in determining what machinery a company will require.

Depending on the type of liquid, different filling methods are required. It is possible to have a clear and free-flowing liquid and one that is dense, foamy, or contains suspended particles. The best way to measure and ensure that the machine fills containers with the correct amount of liquid depends on the type and container.

Filler for Gravity/Siphon Applications

When using gravity filling, the liquid is fed into the container at a timed rate from a tank above the filling heads, and the weight of the liquid acts as the filling force. Particles in the liquid should not clog spray heads, and the liquid should flow freely with constant viscosity.

Filler for the overflowing spaces

This method achieves the desired fill level if slight volume variations occur during overflow filling. Clear containers make the product look consistent and visually appealing to customers. 

Filler Material for Pistons

A valve system that uses a stroke and discharge system is used in piston filling machines, which are the best choice for thick liquids and pastes. The piston transfers the product from a drum to a container. Semi-automatic machines often use these precise volumetric systems, which can handle a wide range of liquids. Adding more filling heads is a simple process.

Fillers for Bottom-Up/Isobaric Pressure

 Bottom-up machines fill the container to a predetermined level before discharging the liquid. Foaming liquids are excellent use for this method. A diffuser is used in the isobaric filling process, which is best suited for carbonated beverages, to evenly distribute the liquid inside the container and prevent it from evaporating. Pressurized CO2 maintains a constant pressure as the bottle fills while the nozzle exhausts any extra gas.

Filling Station for Pumps

These machines have a pump that draws the liquid from a drum and injects it into the container, making them ideal for thick liquids. Pulse timing, a technique used by pump fillers, is commonly used to count the number of gear revolutions to arrive at the fill volume. 

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