Knowledge centre · Upgrade
Most upgrade projects are not about speed. They are about how much product is given away on every container, and how much of the shift is spent adjusting the machine instead of running it.
| Item | Piston line | Servo rotor pump line |
|---|---|---|
| Metering element | Piston + valve seat | Rotor pump + servo drive |
| Fill volume changeover | Mechanical adjustment or part change | Parameter change on the HMI |
| Particle tolerance | Limited | High — no seat to bridge |
| Cleaning | Disassembly for solids | CIP-capable configuration |
| Accuracy control | Manual trial and re-adjustment | Servo correction, check-weigh feedback |
A changeover is therefore usually a filling-station retrofit rather than a new line — which is why the payback calculation is dominated by material savings rather than by throughput.
Grounton Pak runs upgrade assessments on the same principle — a statistical baseline of current give-away first, then a filling-station retrofit with a product-specific acceptance test to prove the material saving.
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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