Liquid Filling Machines Explained: Gravity, Pump, Piston and Overflow Systems
Liquid Filling Machines are crucial to any modern packaging line working with fluids of almost any viscosity. These components of a packaging system help to ensure accurate, efficient, and consistent fills using level, weight, or volume. From popular beverages to foods, chemicals, cosmetics and more, selecting the right filling technology ensures each bottle or container receives the intended amount of product while minimizing waste and maximizing production speed.
At Liquid Packaging Solutions, Inc., we engineer and build liquid filling machines designed to accommodate specific product characteristics and production requirements. Understanding the differences between the filling principles can help you determine which machine best fits your own operation!
Gravity Filling Machines
Gravity filling machines provide a simple and economical liquid filling solution. As the name suggests, gravity fillers rely on the force of gravity to move product from a holding tank above the fill heads, through the product pathway, and into waiting containers. These volumetric fillers work best with thin, free-flowing liquids like water, juices, and certain chemicals. The simplicity of these liquid fillers makes them both reliable and easy to maintain while they provide a cost-effective and efficient process.
Pump Filling Machines
Pump filling machines offer increased flexibility when compared to the gravity fillers. By matching the pump type to the product, the liquid receives a little extra push as it moves through the product pathway and into the containers. By using the pump and not relying solely on gravity, these machines can offer the same accurate volumetric fill but can also handle higher viscosity, or thicker, products. Pump fillers can be an ideal solution for liquid soaps and other cleaners, personal care products, and higher viscosity food products. The ability to control the pump type and speeds also allows for more control in the fill for specific products, providing the same efficient filling process.
Piston Filling Machines
Piston fillers provide a third volumetric fill somewhat similar to the pump filling machines. These fillers draw product into a cylinder and then use the piston to help push product out of the cylinder and into waiting containers. The piston filler will often be an ideal solution for high viscosity products as well as products with particulates like sauces, jams, or jellies. The wide open cylinder allows the particulates to easily pass through the product pathway while also ensuring a highly accurate volumetric fill as the same amount of product fills the cylinder with each cycle.
Overflow Filling Machines
As an alternative to volumetric fills, LPS offers the overflow filling machine. Instead of measuring products by volume, overflow fillers fill containers to a specific pre-determined level and then return excess, or overflow, liquid to the holding tank. This type of fill is useful when liquids are packaged in clear containers, offering an aesthetically pleasing line and brand appeal when products are on the shelf.
LPS also offers custom filling machines for unique circumstances, such as filling by weight, filling molten products, or filling hazardous chemicals. Selecting the correct filling system for any project will depend on several factors, including viscosity, speed, containers, space, and more. At LPS, we will work with each and every packager to ensure we identify the most efficient liquid filling machine for their specific application.
From semi-automatic tabletop fillers to fully automatic equipment, standalone machines to complete packaging systems, LPS provides reliable equipment designed to streamline production while maintaining high-quality standards! Call today for a no-obligation conversation with an LPS Filler Specialist and see how we can help you meet your goals!