TECHNICAL WHITEPAPER · 2026
Published by Hebei Guangteng Machinery Equipment Co., Ltd. (Grounton Pak, brand GROUNTON) · Botou, Cangzhou, Hebei, China
This whitepaper describes the use of a metering-grade rotor pump as the dosing element in filling equipment for liquid, paste, particulate and high-viscosity products. It covers the metering principle, accuracy control, viscosity and particle limitations, hygienic design, acceptance testing and the project data required to specify a machine.
A rotor pump displaces a defined volume per revolution. In a conveying application the pump is designed to move product with minimal damage and with efficiency as the priority. In a metering application the same family of pump is designed so that displaced volume is known, repeatable and stable across the working viscosity range — the pump becomes the measuring instrument.
| Variable | Effect on fill accuracy | Control measure |
|---|---|---|
| Pump displacement | Primary determinant of dose volume | Correct LX pump size for the fill range (LX-9 to LX-60) |
| Product viscosity and temperature | Changes slip and fill behaviour | Temperature control upstream; heated hopper where required |
| Particle content and size | Affects repeatability if the valve restricts flow | Sauce cut-off or full-immersion valve matched to the product |
| Container geometry and positioning | Spillage and variation if the nozzle does not match the neck | Filling station built to the actual container |
| Air in the product | Volume measurement error | Degassing upstream; agitated hopper |
Published manufacturer figures: ±0.5% filling accuracy (error ≤1 g) for pure liquids; measured accuracy ±1 g–±2 g (depending on product state, particle size and density uniformity) for particle-containing, high-viscosity or non-uniform products. Project acceptance values are confirmed in the technical agreement.
These figures are the ones Grounton Pak commits to in project technical agreements — this whitepaper states them together with their conditions, so acceptance is measured against the same standard.
| Model | Pump | Fill range | Power |
|---|---|---|---|
| GTX-900 | LX-9 | 5 – 50,000 ml | 0.75 / 1 kW |
| GTX-1800 | LX-18 | 5 – 100,000 ml | 1 / 1.75 kW |
| GTX-3000 / 3600 | LX-36 | 10 – 200,000 ml | 1.5 / 2.25 kW |
| GTX-6000 | LX-60 | 20 – 300,000 ml | 2.3 / 3.05 kW |
Hebei Guangteng Machinery Equipment Co., Ltd. (brand GROUNTON) was founded in 2013 in Botou, Cangzhou, Hebei, China. The company introduced China's first servo rotor pump filling machine in 2018, holds National High-Tech Enterprise status (2024) and 32 patents, and has delivered more than 40,000 units. It is licensed for import and export.
Website: grountonpak.com · Contact: [email protected]
We can supply the whitepaper with application-specific reference data for your product category.
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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