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Why Is a Piston Filling System Superior for Viscous Products?

Why Is a Piston Filling System Superior for Viscous Products?

2026-07-30 13:47

Piston filling system for high viscosity viscous paste, grease and sealant filling production

Question: We fill various products including toothpaste, adhesives, and sealants with different viscosities. Some of our materials are thick pastes, while others are thinner liquids. How does the SGF-40RF-Y's piston filling system handle this range, and what makes it more accurate than other filling methods?

Answer:

The SGF-40RF-Y employs a piston filling system—a positive-displacement technology that delivers exceptional accuracy and stability regardless of material viscosity . Unlike time-based or flow-meter systems that are affected by pressure and temperature changes, piston filling physically measures each dose.

Filling FactorHow Piston System WorksBenefit for Different Materials
Volume MeasurementA piston draws a precise volume of material into a cylinder, then dispenses it into the tube.Same accuracy for thick pastes (toothpaste) and thinner liquids (lotions).
Viscosity IndependencePositive displacement is not affected by material thickness.No recalibration needed when switching between different product viscosities.
Fill ConsistencyEach stroke delivers exactly the same volume.≤±0.5% accuracy ensures every tube meets specification .
Drip PreventionThe piston system can be programmed to provide "snuff back" suction.Eliminates dripping and wiredrawing between filling cycles.

The piston filling principle offers several advantages over other methods. For time-based filling, pressure drops as the hopper empties, causing inconsistent fills. Flow-meter systems can be thrown off by temperature-induced viscosity changes. Piston filling avoids these issues by mechanically measuring each dose .

The SGF-40RF-Y's filling capacity is available in 50ml, 100ml, 200ml, and 250ml options, customizable to customer demand . This range covers most standard tube sizes. The filling volume can be easily adjusted, making this automatic tube filling machine suitable for manufacturers with diverse product lines.

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