How this product class behaves
The typical process uses piston, servo-piston, progressive-cavity or positive-displacement filler supplied through a hopper or short, large-bore transfer route that avoids excessive restriction. The equipment should be configured to manage stringing with shut-off nozzles and match acceleration to viscosity.
Before discussing speed or automation, define the actual operating window: minimum and maximum dose, product temperature, density, viscosity or bulk density, inclusions, foam, shear sensitivity, corrosivity, pack dimensions and closure. A single nominal sample is not enough for a robust specification.
Recommended filling technologies
Primary route
Piston, servo-piston, progressive-cavity or positive-displacement filler.
Product supply
A hopper or short, large-bore transfer route that avoids excessive restriction.
Critical control
Manage stringing with shut-off nozzles and match acceleration to viscosity.
Temperature and product condition
Held within a defined range because viscosity changes with temperature. Temperature changes may alter viscosity, foam, gas breakout, dose accuracy, closure performance or pack stability. Define where temperature is measured and the permitted deviation.
Cleaning, changeover and material compatibility
Plan for quick-release product-contact parts or a validated clean-in-place arrangement. Product-contact materials, elastomers, lubricants, surface finish and drainage should be reviewed against every formulation. Include safe access, line clearance, product recovery and waste handling.
Principal production risks
Risk focus
Product tails, air pockets, inconsistent dose weight and smearing around the neck. The process and machinery risk assessments should cover normal running, refill, sampling, adjustment, blockage clearance, cleaning and maintenance.
What to prove in a product trial
- Repeatable dose at minimum and maximum line speed
- Clean cut-off and acceptable pack presentation
- Stable product feed through refilling and batch end
- Changeover and cleaning time using the intended method
- Closure, label, code and distribution performance after filling
Example product applications
Tomato Ketchup in Glass Jars
Smooth viscous product
Sauces & condimentsTomato Ketchup in Squeeze Bottles
Smooth viscous product
Sauces & condimentsTomato Ketchup in Pots and Tubs
Smooth viscous product
Sauces & condimentsTomato Ketchup in Preformed Pouches
Smooth viscous product
Sauces & condimentsTomato Ketchup in Single-serve Sachets
Smooth viscous product
Sauces & condimentsBarbecue Sauce in Glass Jars
Smooth viscous product
Sauces & condimentsBarbecue Sauce in Squeeze Bottles
Smooth viscous product
Sauces & condimentsBarbecue Sauce in Pots and Tubs
Smooth viscous product
Sauces & condimentsBarbecue Sauce in Preformed Pouches
Smooth viscous product
Sauces & condimentsBarbecue Sauce in Single-serve Sachets
Smooth viscous product
Sauces & condimentsBrown Sauce in Glass Jars
Smooth viscous product
Sauces & condimentsBrown Sauce in Squeeze Bottles
Smooth viscous product
Common questions
Which filling machine suits a smooth viscous product?
A piston, servo-piston, progressive-cavity or positive-displacement filler is the normal starting point. Final selection depends on dose, accuracy, product feed, temperature, pack, cleaning, contact materials and required output.
Why are product samples needed before specifying a filler?
Published viscosity or density values do not show aeration, particles, stringing, shear sensitivity, temperature effects or interaction with the nozzle and pack. A representative test exposes these issues before manufacture.
Can one machine cover several product viscosities or formats?
Often yes, within a defined operating window. The specification should identify the easiest and most difficult products, smallest and largest doses, every pack height and diameter, and the acceptable changeover method.
How is filling accuracy confirmed?
Agree whether the target is volume or mass, the permitted tolerance, test method and sampling frequency. Measure warm-up, hopper refill, speed changes and end-of-batch conditions rather than only stable running.
What determines the real line speed?
The slowest repeatable operation governs output. Product refill, container loading, filling time, closure handling, label application, rejects, accumulation, cleaning and operator intervention all affect the sustainable rate.