16 Different Types of Liquid Filling Machines You Should Know

Liquid filling industry is ever growing with factories looking for the most efficient and reliable machines.

Over the recent past, key players in the industry like SaintyCo have introduced innovative liquid filling technology that guarantee efficiency, cost saving and high hygiene standards.

Today, we are going to explore some top liquid filling machine available for a wide range of products.

Table of Contents

What are Liquid Filling Machines?

Liquid fillers are specialized machines made to ease and automate the process of packaging liquid products into their respective containers.

They are primarily exploited in manufacturing facilities such as the Coca-Cola manufacturing plant to dispense large volumes of liquids into bottles, pouches, or other forms of containers. However, owing to the distinct filling demands that come with varying types of liquids, these fillers are manufactured in varying forms.

As you will see here, these machines vary liquid filling principles which may have both pros and cons.

1. Hand-Operated Liquid Filling Machines

These liquid fillers thrive in small-scale liquid production operations since they boast the lowest degree of automation. As such, their output is comparatively lower and they demand a relatively higher input from you or your operator. Despite their low automation level, hand-operated liquid filling machines boast great precision and can be tailor-made to dispense liquids with varying viscosities.

Working Principles of Hand-Operated Liquid Fillers

Hand-operated liquid fillers adhere to a working principle that is distinct from that followed by fillers with a higher degree of automation. The vast majority of the workload is undertaken by you or your operators. Their operation revolves around the steps discussed below:

Setting up the Machine: Begin by filling the filler’s hopper with your respective liquid then proceed to set the required fill level. To adjust the fill volume, simply use the featured lever or scale. Some manual liquid fillers feature a knob.
Dispense the Liquid: Place your respective bottles or other forms of containers perfectly beneath your filler’s filling head or heads. Once the bottles are accurately positioned, move your lever accordingly to kickstart the filling process. This will prompt the dispensation of your liquid into a pump chamber and ultimately into your respective containers.
Remove the Filled Containers: Once the bottles or pouches have amassed the required liquid volume, extract them from the filling area and replace them with empty bottles.

Applications of Hand-Operated Liquid Fillers

Ketchup packaging
Small-scale personal care product filling
Pharmaceutical liquids filling in labs
Home-based liquid packaging
Small businesses liquid packaging

2. Semi-Automatic Liquid Filling Machines

Semi-automated liquid fillers have made a well-reputable name for themselves in small and medium liquid manufacturing entities due to the balance they offer between human input and automation. They are not fully automatic yet they do not require you to undertake all the filling processes.

Semi-automatic Liquid Fillers Working Principles

These fillers boast manual features such as container placement as well as automated features such as filling. The incorporation of automated features makes them easier to use compared to their hand-operated counterparts. Operating them simply requires you to follow the steps outlined below.

Positioning the Containers: First, take your empty containers and place each below a filling head, carefully and accurately.
Getting the Filler Running: Once your empty bottles are well-positioned, get your semi-automated filler up and running. To accomplish this, simply push your filler’s activation button. Some fillers, however, feature pedals or switches.
Filling the Liquid: After activating the semi-automatic liquid filler, the machine will automatically measure and pass out a specific volume of your liquid into the containers positioned underneath. This is thanks to the piston, or gravity filling mechanism enabled in the filler.
Extracting the Packaged Bottles: After dispensation, carefully remove the filled containers. In some fillers, this is undertaken automatically by an attached conveyor system.

Semi-Automatic Liquid Fillers Applications

Medium-scale cosmetic liquids filling.
Beverage packaging.
Pharmaceutical filling.
Paint dispensing.
Craft beverage packaging.
Automotive fluid filling.

3. Automatic Liquid Fillers

Automatic liquid fillers are without a doubt the epitome of liquid packaging invention given that they narrow down the need for human input to almost zero. They boast unrivaled levels of accuracy and filling rates, making them the most sought-after machines in industrial liquid production and packaging.

They allow you to just sit and monitor as they load your empty containers, fill the liquid, and ultimately offload the filled bottles. Choosing modern and robust technology will ensure smooth liquid bottle filling process.

The Working Principles of Automated Liquid Fillers

A typical automated filler transfers your liquid product in measured volumes into your specialized containers, all without involving your hands. They achieve this in a number of distinct steps, namely:

Loading the Empty Containers: Simply feed your empty containers onto the machine’s conveyor belt and let it do all the rest. The filler will automatically load your empty bottles onto the specific filling station.
Placement of the Empty Containers: The empty containers delivered at the filling station are then arranged and placed underneath the numerous filling nozzles one at a time. This is done with the aid of sensors fitted onto your machine.
Filling the Liquid: Once the bottles are strategically positioned, the filling begins automatically. Once a specific volume is dispensed into each bottle, the filled bottles are moved into the next stage while new empty bottles take up their spot beneath the filling heads.

Applications of Automated Liquid Filling Machines

Industrial food and beverage packaging
Large-scale pharmaceutical products filling
High-volume chemical filing
Large-scale cosmetics packaging
Liquid agrochemical product filling
Beer production

You can also explore our fully automatic liquid filling line.

4. Piston Liquid Filling Machines

These spill-free filling machines come bearing piston cylinders, which allow them to draw your liquid product from the reservoir and fill it into your respective packaging correctly. They boast extremely high filling accuracies, with a variation that does not surpass ±0.5–1%. This explains their extensive utilization in packaging relatively costlier liquids such as pharmaceutical fluids.

Piston Liquid Fillers Working Principles

The operation of a piston liquid filling machine boils down to the piston mechanism they deploy to dispense liquids into containers. This is normally accomplished in several steps, namely;

Piston Filling: The dispensation of your liquid commences once the pistons pull back. This prompts the suction of your liquid from your filler’s hopper and into the piston cylinders. To prevent the unwarranted retraction of the liquid into the hopper, the piston cylinders are fitted with a backflow valve.
Dispensing the Liquid: With the liquid measured and contained in the piston cylinders, the pistons are released consequently forcing the liquid in the cylinders into the respective containers via the respective filling heads.
Adjustment: If you desire to change the fill level or volume, simply fine-tune the stroke length of your pistons.

Applications of Piston Liquid Fillers

Pharmaceutical packaging.
Precise liquor filling.
Chemical packaging.
Lubricants bottling.
Accurate cosmetics dispensing.

5. Gravity Liquid Fillers

These liquid fillers are revered and broadly utilized due to their simple setup and reduced need for maintenance. They come with a visibly large reservoir tank, which holds your bulk liquid awaiting dispensing. The dispensation is achieved through gravity, which sees the liquid trickle down into your respective containers from the reservoir through the stems.

The Working Principle of Gravity Liquid Fillers

By leveraging gravity, these filling machines manage to accurately dispense liquids of varying thicknesses into varying containers. This involves a few simple steps, the key amongst them being:

Loading the Liquid: Filling begins once you pump or feed your liquid product into the holding tank. In some machines, this is undertaken automatically using conveyor systems while in some, you must manually load the fluid.
Placing the Containers: Manually align your empty bottles underneath the filler’s filling heads. However, semi-automatic and automated fillers rely on conveyor systems to ferry and position the containers.
Opening of the Valves: Once the valves open, the liquid is transferred from the holding tank, through the stems and nozzles and into your respective containers. Owing to gravity, the fluid flows naturally.
Controlling the Fill Volume: Gravity fillers are designed to achieve a constant fill rate and this is accomplished with the help of level sensors, vent tubes, or time-based filling. When the desired liquid level in the container is achieved, the valves close automatically.

Gravity Liquid Filler Applications

Water bottling.
Cleaning solutions packaging.
Pharmaceutical bottling.
Sauce Packaging.
Soft drink bottling.

6. Overflow Liquid Fillers

This packaging machine attempts to dispense your liquid product into your respective containers to a specific level. Rather than focusing on parameters such as weight and volume, overflow liquid fillers prioritize a uniform fill level. They come bearing specialized nozzles, which permit the retraction of excess fluid back into the reservoir tank.

Overflow Fluid Filler Working Principles

Typical nozzles fitted onto other liquid fillers tend to close once a predetermined volume, weight, or time is achieved. However, the nozzles in overflow fillers are built differently. They allow the backward flow of excess fluid back into your holding tank. These fillers work mysteriously as is shown below:

Inserting the Nozzles: To start the filling process, overflow fillers bring their respective nozzles into contact with your respective empty bottles. This results in the generation of a seal on your containers.
Filling: With the nozzles in contact with your containers, the liquid is dispensed either through gravity, pistons, or pressure into the containers until the desired fill level is attained.
Overflow: Once the bottles are filled to the desired level, the excess fluid is sucked back into your holding through a return port on the overflow nozzle. This ensures that all your containers have a uniform fill level.

Applications of Overflow Liquid Fillers

Foamy fluids
Low viscosity liquids
Medium viscosity liquids
Window cleaners
Light gels
Distilled spirits

7. Flow Meter Liquid Fillers

Flow meter liquid filling machines are particularly ideal for bottling low-viscosity fluids and they achieve high accuracy levels. A typical flow meter liquid filler only experiences variations of ± 0.5%. They rely on Coriolis flow meters, which suit better non-conductive liquids, or electromagnetic meters, which suit better non-oil conductive fluids.

Flow Meter Liquid Filler Working Principles

These highly accurate fillers come equipped with a flow meter tasked with calculating how much liquid is being dispensed into your bottles in real-time. This results in accurate dispensing making flow meter liquid fillers extremely reliable. Their operation involves:

Dispensation of your liquid into the filler’s holding tank: Your fluid is drawn from the manufacturing pipeline and injected into the machine’s hopper.
Measuring the liquid’s flow rate: As the liquid flows into your respective containers, a flow meter takes note of the flow rate.
Flow cutoff: Once the desired fill level is attained, the valve closes bringing the filling process to an end. The filled bottles are then withdrawn and replaced with empty ones.

Flow Meter Liquid Filler Applications

Fruit juices
Fresh milk
Spirits
Mineral water
Yogurt
Wine

8. Vacuum Liquid Fillers

These liquid bottling machines are primarily relied upon to bottle rigid bottles and other containers due to their unique filling mechanism. They exploit negative pressure to transfer your fluid products into your respective packages. They come with a vacuum pump, which sucks out the air from your empty bottles resulting in the creation of a partial vacuum.

The Working Principles of Vacuum Liquid Fillers

Placing the Empty Containers Beneath: The process begins with the positioning of rigid containers, particularly glass bottles beneath your filler’s filling heads.
Creating Partial Vacuum: Once the empty bottles come into contact with the respective filling nozzles, a watertight seal is generated. The air inside the empty bottles is then sucked out using a vacuum pump leaving your bottles totally empty.
Liquid Filling: The fluid reserved in bulk in your holding tank is subsequently sucked into the empty bottles due to the negative pressure generated. The filling process halts once a preset level is attained.
Bottle Removal: With the bottles accurately filled, the vacuum pressure is released. At this point, you can extract your bottles and direct them towards sealing and capping.

Vacuum Liquid Filling Machine Applications

Edible oils filling.
Liquid medication packaging.
Water and juice bottling.
Sauce filling.
Liquid cosmetics bottling.
Non-viscous chemical filling.

9. Net-Weight Liquid Filling Machines

Net-weight liquid fillers come endowed with a load cell, which allows you to package accurate volumes of your liquid product by measuring their weight. By ensuring that only the right volume of your liquid is dispensed into your containers, these fillers contribute significantly to minimized wastage.

Net-Weight Liquid Filling Machine Working Principles

These fillers simply dispense precise doses of your liquid product into your respective bottles by gauging their mass. This is made possible by the inclusion of a high-level load cell tasked with measuring the weight of your empty bottle and your filled bottle. Net-weight filling involves;

Container Detection and Weighing: Once the empty bottles are placed on top of the load plate, their respective mass is detected by the load cells.
Dispensing the Fluid: After the load cell has established the tare weight, the filling heads positioned above your containers begin to dispense the liquid from your reservoir into the containers. The load cell keeps monitoring the mass and once the target weight is attained, dispensation is halted.
Valve Closure: With the desired net weight attained, the filling nozzles are closed thus stopping the filing process.

Net-Weight Liquid Fillers Applications

IV fluids
Lotions
Corrosive liquids
Bulk liquid packaging
Edible oil filling
Beverage packaging

10. Pump Liquid Filling Machines

Rather than utilizing negative pressure or gravity, pump liquid filling machines make use of pumps to pass on accurate amounts of liquid from your pipeline or holding tank onto your respective containers. They are essentially volumetric fillers and they rely on specialized pumps, which include:

Gear pumps
Peristaltic pumps
Rotary pumps
Piston pumps

The Working Principles of Pump Liquid Fillers

Pump liquid fillers feature several pumps, with each pump assigned to one of the filling nozzles. They convey your liquid into containers in numerous steps, namely;

Liquid Intake: First, they transfer your respective fluid from the manufacturing pipeline or your connected hopper.
Measuring the Liquid: Before dispensing the fluid into the respective containers, the pump filler first measures the amount to be bottled. This ensures high-level accuracy.
Fluid Filling: Subsequently, the measured liquid is driven into a specified bottle and this is powered by the pump linked to the respective filling nozzle.
Container Withdrawal: Once the measured amount of fluid is bottled, the container is ejected from the filling station.

Applications of Pump Liquid Filling Machines

Household liquid products packaging.
Nutraceutical filling.
Pharmaceutical packaging.
Food and beverage bottling.
Supplements bottling.
Herbal tinctures filling.

11. Inline Liquid Fillers

These fillers essentially come as part and parcel of larger liquid manufacturing plants. They boast a linear configuration, which sees empty containers loaded onto a conveyor system, delivered to the filling station, and later to the capping and labeling stations. With an inline liquid filling machine, you are guaranteed improved throughput.

The Working Principle of Inline Liquid Fillers

These automated fillers simply utilize a conveyor system to bring empty containers for bottling before handing them over to other manufacturing stages. They are configured to operate in a straight line and they bottle fluids in the steps outlined below.

Loading the Empty Containers onto the Conveyor System: Empty bottles or other forms of liquid packaging are strategically placed on the conveyor system, which subsequently ferries them to the respective filling nozzles. This can be done automatically or by hand.
Filling: Once the conveyor belt delivers the empty containers to the filling station, these containers are positioned beneath the multiple filling heads aligned in a straight line. Dispensation is then commenced using pumps, gravity, or any other form of filling mechanism.
Removal of the Filled Bottles: Subsequently, the well-filled containers are drawn from the filling station and delivered to the next manufacturing stage. This is often the sealing, capping, or labeling stations.

Inline Liquid Filler Applications

Liquid paint filling
Water bottling
Liquid chemicals packaging
Edible oils and sauce packaging
Alcoholic beverages bottling
Oral suspension filling

12. Monobloc Liquid Fillers

These liquid filling systems not only dispense your liquid products into the respective bottles but they also cap and label the filled bottles. They are simply all-in-one systems consisting of multiple units, with each unit assigned a distinct packaging task.

Monoblock Liquid Filling Machine Working Principles

The role of any liquid filling machine is to minimize human intervention and the inaccuracies that come with it. Monobloc liquid fillers thrive in liquid packaging since they aggregate multiple packaging processes thus minimizing downtime. They accomplish this in several steps namely:

Empty Container Loading: The jars or bottles to be packaged are loaded onto a conveyor system, which transports them to the first packaging station.
Dispensing the Liquid: The well-cleaned containers are subsequently delivered to the filling station where the filling process commences. This is often done using peristaltic pumps, gravity, or negative pressure. To eliminate the risk of spillage, monobloc fillers rely on sensors to accurately position the empty containers.
Capping: Unlike conventional fillers, the monobloc filler has a capping unit neighboring the filling unit. Here, your filled bottles are sealed or capped securely automatically.
Labeling: Most monobloc liquid fillers also feature a labeling unit, which applies labels through printing or by applying adhesive labels.

Monobloc Liquid Filler Applications

Sterile filling.
Dairy products filling.
Personal care products packaging.
Ophthalmic solutions filling.
Chemical bottling.
Lubricants packaging.

13. Rotary Liquid Filling Machines

These liquid fillers feature one or multiple circular filling stations, which make it possible for you to package your liquid products continuously and at high speeds. The conveyor system in rotary liquid fillers is supported by moving wheels, which allow you to load different batches of empty containers without necessarily halting the filling process.

The Working Principles of Rotary Liquid Filling Machines

Empty Container Feeding: Clean, empty bottles or other packaging options are fed into the filler’s infeed systems.
Feeding the Containers to the Turret: Once the empty containers are loaded into the infeed system, they are ferried to the rotating turret where they are positioned in preparation for the filing process.
Dispensing the Fluid: The turret holding your empty containers places them beneath numerous filling heads prompting the dispensation of a predetermined volume of liquid into each bottle.
Removing the Filled Containers: The accurately filled jars or bottles are then loaded onto an exit conveyor system, which delivers them to the next packaging stage.

Applications of Rotary Liquid Fillers

Rotary liquid filling machines promise incessant packaging, which is not attainable with most liquid fillers. This explains their high demand in industries such as:

Pharmaceutical industry.
Personal care products industry.
Chemical industry.
Food and beverage industry.
Dairy industry.
Automotive industry.

14. Tube Liquid Fillers

Tube liquid fillers are packaging units tailor-made for dispensing fluid products into tube-like containers safely and accurately. They are particularly utilized to package creams, liquids, and pastes into plastic tubes. However, they are also compatible with laminate and aluminum containers.

Tube Liquid Fillers Working Principles

Loading Empty Tubes: The tubes to be packaged are loaded onto the filling machine either through an infeed system or by human hands. When loading the tubes make sure the open, top end is facing upwards.
Liquid/Cream Filling: With the tubes loaded and carefully positioned, the tube filler proceeds to inject a predetermined amount of your product into the tubes.
Sealing and Ejection: The filled tubes are then delivered to a separate sealing station, where they are sealed using heat or any other applicable method. The sealed tubes are then conveyed to a collection tray.

Tube Liquid Filling Machine Applications

Pharmaceutical ointment filling.
Toothpaste filling.
Pastes and condiments packaging.
Lubricants filling.
Lotions packaging.
Liquid paint filling.

15. Time-Based Liquid Filling Machines

These liquid filling machines boast great filling accuracy and this is a testament to their unique yet highly dependable filling mechanism. They attempt to regulate the flow time thus guaranteeing you accurate filling levels. Time-based liquid fillers are particularly effective when bottling low-viscosity fluids.

Time-Based Liquid Fillers Working Principles

Feeding the Liquid Product: First, your liquid is driven into a specialized hopper, where the pressure is controlled at all times.
Container Loading: Subsequently, your empty vials, tubes, or bottles are onboarded onto the filler.
Filling: With the empty containers positioned underneath the filling nozzles, the respective valves unfasten thus creating a throughway for your liquid to enter the empty containers. Once a set timeline is hit, the valves automatically close bringing the filling process to a close.
Filled Containers Removal: Ultimately, the filled containers are ferried to the next station for further packaging.

Time-Based Liquid Fillers Applications

Cleaning solutions packaging
Low-cost liquids packaging
Small-scale liquid packaging
Syrups filling
Low-viscosity fluid bottling

16. Aseptic Liquid Filling Machines

Aseptic liquid filling machines prioritize safety hence they feature a sterilization stage, which seeks to eliminate and lock out any germs or contaminants from the filling process. As such, they are prominent in packaging medical products as well as foods and beverages. They shrink the need for human input thus reducing the chances of contamination.

The Working Principles of Aseptic Liquid Fillers

Sterilization: First, the containers you will use are subjected to rigorous cleaning, which covers both the interior and exterior. This involves passing the vials, bottles, or ampules through controlled heating, which kills off microbes.
Aseptic Filling: The sterilized containers are subsequently ferried to their respective filling stations in batches. This is done by a conveyor system, which delivers them to tracks that place each container beneath a filling head. Controlled amounts of the liquid are then dispensed into the vials or bottles in a controlled environment, which closes any window of opportunity for contaminants.
Sealing: Next, the filled containers are immediately sealed or capped thus averting the entry of microbes as the containers are ferried to the next stage.

Applications of Aseptic Liquid Fillers

Dairy products fillings.
Ready-to-drink beverage packaging.
Vaccine filling.
Ophthalmic solutions packaging.
Health supplements packaging.
Skincare serum bottling.
Infant formula filling.

Conclusion

It is quite clear that liquid filling machines not only help you get precise amounts of your liquid product into containers of your choice but they also help uphold your product’s quality. They come in varying forms thereby ensuring that you have the perfect filler for your specific type of liquid. However, you must exercise moderation when picking one. This is the only way to achieve the results you desire.

More resources:

Powder Filling vs Liquid Filling – Source: CAPSULEFILLER