| Valve type | Piston dosing, or load cell for high-value product |
| Viscosity | Up to 10,000 cP with the right bore |
| Products | Sauces, pastes, pulp juice, honey, detergents |
| Package | PET, glass, jar, pouch by configuration |
| Key control | Dose repeatability, drip-free cut-off, product temperature |
| Cleaning | CIP circuit with a bypass for high-solid product |
A piston draws a fixed volume into a cylinder and pushes it out, so the dose does not depend on how fast the product flows. A gravity or pressure valve depends on flow time, and thick product makes that time unpredictable. For anything above a few thousand cP, the piston is the simpler answer.
These systems can handle a variety of high-viscosity products, including thick sauces, pastes, and oils, making them ideal for bottling lines that require flexibility to accommodate different product types.
A suck-back stroke at the end of the dose pulls the tail back into the nozzle. The stroke length, the nozzle bore and the product viscosity have to be matched, and they change when the recipe changes. Drip is a setting problem before it is a nozzle design problem.
The adjustable piston speed and pressure control mechanisms allow for smooth and consistent dispensing of thick liquids, ensuring a clean fill without air pockets or product waste.
| Product type | Dosing | Main risk |
|---|---|---|
| Smooth sauce | Piston | Drip at the nozzle |
| Chunky sauce | Piston with large bore | Bridging at the valve seat |
| Honey and syrup | Piston or load cell | Stringing and slow cut-off |
| Pulp juice | Piston | Fibre settling in the bowl |
The Edible Oil Load Cell is the reference unit for this configuration.
High-solid product does not flush like water. The CIP circuit needs a pre-rinse at temperature, a bypass around the filler bowl, and a return path that does not leave product in a dead leg. Cleaning time on a sauce line is often longer than the production changeover, and both belong in the capacity plan.
The specification sheet for the Filling Machine for Viscous Product carries the utility figures quoted here.
Dose volume, piston stroke, suck-back, conveyor speed and often the nozzle set. A recipe change on a piston line is mostly mechanical, so it takes longer than a recipe change on a volumetric water line. Two very different products usually justify two fillers rather than one flexible one.
The demand for efficient and precise filling solutions in the food industry has never been more critical, especially for bottled water plants seeking to diversify their product offerings to include high-viscosity liquids like sauces, pastes, and oils.
The same question is worked through from another angle in How Piston Fillers Handle Viscous Products.
Most often a worn piston seal or a falling product temperature. Both reduce the actual volume delivered per stroke. Check the seal and log the product temperature before adjusting the stroke.
Piston doses by displacement and is faster; load cell doses by weight and is more accurate when density varies. For a chunky product with variable density, weight filling avoids give-away.
It is set by the bore and the valve seat, not by the piston. Specify the largest piece in the product and size the seat above it, or the filler bridges and the dose falls short.
The suck-back stroke is too short for the viscosity, or the nozzle bore is too large. Both are settings, and both change when the recipe changes.
Country:Kazakhstan
Product: PET Bottled Sparkling Water, Canned Soft Drink, Canned Tea
Capacity: 25000CPH (250ml)
Solution:Three Lines,7000BPH(1.5L), 15000CPH(330ml),15000CPH(450ml)
+86 13921964455
[email protected]
A2 Dongjiu Industrial Park, 30 East Jintang Road, Tangshi, Zhangjiagang, Jiangsu 215600, China
