The metering systems that come with your liquid filling machine must be taken care of so that your liquid filling machine functions properly and efficiently. In order to make sure that your filling pumps and/or nozzles are working correctly, you must abide by the following rules.
One of the most important things to check for is that you are using the right filling pump for the product. Glass FU-50 syringe pumps and FUS pumps are for water thin liquids. FKS pumps are for more viscous liquids and FSV pumps are for very viscous liquids. You will also need to make sure that you are using the correct nozzle. Straight through nozzles work well with most liquids. Valve nozzles and nozzles with screens help prevent drips.
Next, you must make sure that your filling pump is thoroughly clean and assembled properly. In order to check for this, you must take the filing pump apart and put it back together. To make sure that your pump is assembled correctly, you can check the pump schematic and instructions. Certain metering systems, such as the Rotary Gear Pump, allow for a tool-less disassembly which in return allows for an expanded cleaning option. You must also make sure that all of the filling pump connections are tight. In order for your product to flow properly, the connections must be secure. All of the seals and gaskets must also not be worn or cracked. If they are, they must be replaced.
You must then check that your piston rings are adjusted properly. They only need to be tightened enough so that the product will not leak past the rings. If your filling pump came with an O-Ring, you will need to check the condition of that ring and replace when necessary. You will also need to check the condition of the cylinder bore. A cylinder bore is the inside diameter of the cylinder. If the bore is scratched or scarred, the O-Ring will wear more easily causing your product to leak past the ring. If the bore is damaged, than it will need to be replaced.
With metering systems, you will need to make sure that all connections are also tightened. You must make sure that the adjustment is correct if you have an adjustable suckback. The adjustment stem only needs to be screwed in enough to prevent the nozzle from dripping. If the adjustment is turned in too far, than air bubbles will get inside the nozzle. You will also need to tighten the seals around the adjustment stem as needed. If the seals are too loose, air can also seep into the pump. nudebase.com
Once you have gone through this operational checklist, you will be able to start your liquid filling project.