PPSI offers two types of liquid filling equipment namely: Piston Type Liquid Filling Machine and Vacuum Liquid Filling Machine.
The Piston Type Liquid Filling Machine is a volumetric type liquid filler. It can accurately dispense a specified volume of liquid into a container. It is suitable for most types of liquids ranging from free flowing to viscous. It is the preferred filling method for products requiring minimum air exposure as it operates in a closed system.
The Vacuum Liquid Filling Machine is a liquid level type filler which means it dispenses an amount of liquid based on the volume capacity of a container. The liquid level of each filled bottle will appear the same when put side by side. However, the liquid volume will differ corresponding to the slight differences of the container volume. This filling method is applicable for liquids that may be aerated and free flowing such as alcohol and mouthwash.
Our filling machines are flexible as they can be used for different products, bottle types and sizes with the use of additional machine parts.
The Piston Type Liquid Filling Machine utilizes a check valve system that opens during the in-feed stroke, thereby suctioning the fluid into the cylinder. It then closes on the discharge stroke, releasing the fluid from the cylinder and through the filling nozzles. The Filling Assembly may come with four, six or eight volumetric piston pumps depending on the customer's output requirement.
The Vacuum Liquid Filling Machine can perform the fill operation in two ways.
If the container is rigid, a Vacuum Induced Filling Process is more appropriate since it will not collapse when performing as part of the vacuum system. In this type, the bottle opening is sealed air-tight by the nozzle assembly which simultaneously opens the vacuum port of the nozzle. The filling liquid is then induced into the bottle due to the vacuum. After the appropriate filling time and level has been reached, the nozzle assembly is automatically raised.
If the container is collapsible which is typical of thin-walled PET bottles, then a Positive and Vacuum Pressure Filling Process is appropriate. The difference of this process is that the filling liquid is pumped into the bottle and not filled through the suctioning of a vacuum. The vacuum cannot be used because the bottle will collapse as air is suctioned out from it. The vacuum operation only begins when the bottles are already filled with the product with the purpose of returning the excess product back to the source tank.
This machine can be supplied with 12 to 20 filling nozzles based on the customer’s output requirement and container specifications.