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What is a piston filler?
The principal operation of a piston filler can be compared with the engine of a car. When the piston pulls back, the intake valve opens and the vacuum created by the retracting piston sucks the product into the cylinder. On the forward stroke of the piston, the intake valve closes and the fill valve opens. Now, the piston pushes the product into your container. Hence, it is called a piston filler...

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For what products do you use a piston filler?
A piston filler is best used when the viscosity of the product to be filled becomes to heavy or particles are in the product. Products such as creams, oils, honey, shampoo, soap, dressings, ketchup. Products as liquid as water and as solid as cream cheese can be deposited with a piston filler...