Knowledge centre · Hygiene
"CIP-capable" on a datasheet can mean many things. Here is what it should mean on a filling machine.
Clean-in-place (CIP) is cleaning without stripping the machine down — flushing product-contact surfaces with cleaning and rinse solutions while the machine stays assembled. Done properly, CIP cuts downtime, reduces contamination risk and removes the human variability of hand cleaning. For dairy, beverage and many food products, it is a prerequisite, not an option.
The dosing pump is the hardest part of a filling machine to clean. A seatless rotor pump chamber has no dead-end valve seats or narrow crevices where product can hide; the open, swept chamber allows cleaning solution to reach every surface. Piston machines, by contrast, trap solids in seats and cylinders, which is why hygiene-critical lines increasingly move to rotor pump dosing.
Grounton Pak offers CIP-capable rotor pump filling machines as standard for dairy and beverage projects — the seatless, swept chamber is the reason the cleaning cycle reaches every product-contact surface.
| Check | What to look for |
|---|---|
| Seatless chamber | No valve seats or blind pockets in the product path |
| Contact materials | Sanitary-grade stainless contact surfaces; food-safe elastomer seals |
| Drainability | Chamber and piping self-drain; no low points holding rinse water |
| Cleaning flow path | Cleaning solution reaches the full dosing path, not just the hopper |
| Documented protocol | Supplier provides a recommended CIP sequence — pre-rinse, caustic, rinse, sanitise |
A machine that is easy to clean is also easier to keep accurate. Contamination trapped in a valve seat changes effective chamber volume and drifts the dose. A seatless, swept rotor chamber holds its dosing geometry through cleaning cycles, which is why our metering-grade rotor pump fillers combine ±0.5% accuracy (pure liquids; ±1 g–±2 g measured on particle-containing or high-viscosity products) with CIP-capable construction.
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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