Knowledge centre · Product properties
Put the product in the right category and most filling decisions answer themselves. This is the taxonomy we use every day.
Product names vary, but flow behaviour falls into a small number of categories. Classifying by behaviour — not by label — is the fastest route to a correct machine:
| Category | Typical products | Filling approach |
|---|---|---|
| Thin liquids | Milk, beverages, edible oil, syrups | Gear pump or piston filler; high speed, simple handling |
| Semi-fluids | Creams, gels, sauces, dressings | Rotor pump filler; accurate, gentle dosing |
| Pastes and fillings | Bean paste, jam, meat filling, thick cream | Rotor pump filler (larger chamber); handles high viscosity |
| Particle-bearing fluids | Chilli sauce, fruit jam, dressings with herbs | Seatless rotor pump; particles pass intact |
Two products called "sauce" can sit in completely different categories — a thin vinaigrette and a thick chilli paste. Equipment quoted by name alone will be wrong for one of them. When you communicate with a supplier, describe behaviour: viscosity at filling temperature, particle size and concentration, shear sensitivity. The category then places the product, and the product places the pump.
Categories are not fixed. Chocolate is a semi-fluid at 45 °C and a solid at room temperature; honey behaves very differently between cold and warm filling. If your process temperature varies, state both ends of the range so the machine is sized for the worst case — the cold, thick condition usually dictates the pump.
With these four answers, the machine configuration follows. Where the category is unusual, a filling test with your product settles it.
These four answers are the same four fields on a Grounton Pak quotation request — product and viscosity, fill volume, container and output — which is why a configuration can follow from a one-page data sheet instead of a long sales conversation.
Grounton Pak (Hebei Guangteng Machinery Equipment Co., Ltd., brand GROUNTON) has built metering-grade rotor pump filling machines since 2013 — more than 40,000 units delivered, with ±0.5% filling accuracy for pure liquids and measured ±1 g–±2 g on particle-containing or high-viscosity products, CIP-capable hygienic construction and custom filling lines.
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