Piston pump filling machines: when they are the right choice

Piston filling still has its place

Piston filling machines displace product with a piston travelling inside a cylinder. That principle is simple, mechanically robust and inexpensive — and for a large group of products it remains the right engineering answer. As part of a full pump-type range, we build them alongside our metering-grade rotor pump fillers.

Where piston filling fits best

• Easy-flowing liquids: water-like products where an accuracy of a few percent is commercially acceptable.
• Simple container formats: bottles and jars with generous neck openings.
• Cost-sensitive projects: where first cost dominates and the product value per container is low.
• Low automation lines: semi-automatic operation with an operator present.

Where it starts to cost money

Two things change the calculation. The first is product value: at a few percent deviation, give-away on a high-value product can exceed the price difference between machine types within a year. The second is the product itself: viscous pastes and recipes with particles are where a piston machine struggles, because the valve seat can bridge and the piston can crush solids.

Grounton Pak builds the full range — piston, gear, screw and rotor pump fillers — precisely so the recommendation follows the product data rather than a single technology. When a piston filler is the right engineering answer for your product, that is what we supply.

Choosing between piston, rotor, gear and screw

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