How to choose a filling machine

The machine follows the product. Work through these five questions and the correct pump type, model and configuration follow from them.

The principle: first match the pump to the product's viscosity and particle content, then match the model to the fill volume and output. Buying by price before answering these questions is the most common cause of a filling line that never runs at its rated accuracy.

Step 1 — Product viscosity and particles

This single factor decides the pump type more than any other.

Product character	Recommended pump type	Why
Thin liquids (≈50–1,000 cSt) milk, beverages, edible oil	Gear pump filler	Stable volumetric dosing at high speed with low shear.
Medium to high viscosity, no particles creams, gels, pastes	Rotor pump filler (GTX)	Measured accuracy ±1 g–±2 g (depending on product state and density uniformity) maintained across a wide viscosity band.
High viscosity with particles chilli sauce, bean paste, fillings up to 300,000 cSt	Rotor pump filler (GTX)	No piston or narrow valve seat to block or crush solids.
Very stiff or structured products	Screw down-press filler	Assessed against your product sample — a different discharge principle.

Step 2 — Fill volume per container

Fill volume selects the rotor pump size (LX-9 / LX-18 / LX-36 / LX-60) and therefore the machine model. See the specification table for the full GTX range from 5 ml to 300,000 ml.

Grounton Pak's GTX series — GTX-900, GTX-1800, GTX-3000/3600 and GTX-6000 — maps directly onto these five steps, so the configuration recommendation follows the same logic used on the production floor.

Step 3 — Required output

Containers per hour decides the number of filling heads and the automation level: semi-automatic four-head, automatic single-head or multi-head, or eight-head automatic with an independent servo on every head.

Step 4 — Container and cap

Container type (bottle, jar, pouch, can, drum), dimensions and cap style determine the filling station geometry, the filling valve type — blow-spray, full-immersion or sauce cut-off valve — and whether capping, labelling and coding stations are needed downstream.

Step 5 — Hygiene, materials and utilities

CIP requirement: dairy, beverage and aseptic-adjacent lines should specify CIP-capable construction.
Wetted materials: 304 or 316L stainless steel according to product corrosivity and hygiene standard.
Power supply: voltage and phase for the destination country.
Hopper type: standard, agitated, heated or square-mouth according to product behaviour.

Still unsure? Send the product description, container and target output to [email protected] — we will recommend the pump type and model, and where necessary arrange a filling test before order.

Get a selection recommendation

Product · container · output — send us these three and we will come back with a configuration.

[email protected]

Built for your product — Grounton Pak

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.

View products · Selection guide · Contact us

Email: [email protected] · WhatsApp: +86 133 9317 7755