Types of Pumps for Filling Machines

filling machine

Packaging is an essential element in a range of industrial applications. What you choose will determine the longevity and final look of your product. As such, a filling machine should be one of the primary machines you have to invest in when starting a production line.

There are different aspects to evaluate when investing in a filling machine. The type of container and product you are using and the metering system you want are the primary ones, which should guide your choice.

Not all liquid filling machines are similar. Before placing an order from a filling machine manufacturer, you should first determine the viscosity of the liquid you are packing. This will determine the filling speed of your products and the kind of metering system or pump you will need.

Here are a few pump alternatives you have for your filling machine:

Piston Pumps

These come in various styles and are renowned for their reliable operation and relative accuracy. A piston pump strokes a similar distance for each cycle in your filling, which generates a pinpoint accurate fill. Coupling the piston pump with an electrical servo-motor will boost the accuracy of your filling. It is also used for filling machines for the food, beverage, pharmaceutical, cosmetics, and specialty chemical industries.

Peristaltic Pumps

These are ideal for applications that need no metallic contact. They will also suffice for large and moderate fillings ranging from 50 to 110mls. Peristaltic pumps are simple to set up and operate and have filling accuracies of 1% to 2%.

In most cases, regular replacement of the tubing is essential to keep your peristaltic pump optimally working. You can still save money with a peristaltic pump in the long run regardless of the frequent tube changes, but that is if you coordinate your production schedule carefully. These pumps are ideal for the biomedical and diagnostic industries where a high changeover between applications occurs.

close up of fillnig machine pumps

Lobe Pumps

These are constructed with high tolerance levels and can, therefore, handle high pressures. They are suitable for large fills like one gallon to two-ounce fills. Lobe pumps will operate in vertical and horizontal positions and are easy to maintain. They are also 3ADairy-rated, meaning that they can be used for filling dairy products.

Owing to their high sanitation, lobe pumps will also suffice for the pharmaceutical, food, diagnostic and personal care industries. Though expensive, their accuracy and cleanliness make them worth it.

Gear Pumps

These are used for high volume fillings such as those in the cleaning chemicals and beverages industries. Compared to the other pumps used in filling machines, gear pumps are cheaper and easy to clean and disassemble. They are also quiet in operation, fill packaging containers fast, and come in different materials.

Unfortunately, gear pumps have low accuracy and must be gravity fed because their design will not allow them to draw liquids from floors.

The key element you should remember when picking a pump for your filling machine is your application and the characteristics of your product. There are two primary categories of filing machines — volumetric and vacuum machines. Volumetric machines will suffice for liquids with a low and medium viscosities, while vacuum fillers suffice for liquids with a caustic or foamy nature.