Liquid Filling Machine

Short answer: A liquid filling machine doses a set volume or weight of product into bottles, jars or cans on a conveyor. The choice of filling principle — gravity, flow meter, piston or weighing — is decided mainly by viscosity, foaming, particles and the accuracy you need, followed by the container and whether the product is filled hot.

How it works

Containers enter on a conveyor and are positioned under the filling nozzles by a starwheel or gates. Product comes from a buffer tank. Depending on the principle, the nozzle opens for a set time at a set level (gravity), until a meter counts the target volume (flow meter), for one stroke of a piston (piston), or until a load cell reads the target weight (weigh filling). Nozzles may dive into the container to reduce foaming, then lift and shut off cleanly. Filled containers continue to capping, labelling and coding.

Which configuration fits

Form	Suits	Watch out for
Gravity	Water, clear juices, thin liquids	Not for thick or particle products
Flow meter	Edible oil, thin liquids, frequent volume changes	Meter choice depends on product conductivity and type
Piston	Sauces, pastes, products with small particles	Seals wear; more parts to clean
Weigh filling	High-value products, large containers	Slower per nozzle

Foam, temperature and particles all affect accuracy. Product sitting on the container neck can stop caps sealing properly.

What we need from you to quote

• Product samples or details: viscosity, foaming, particles, filling temperature
• Container samples or drawings and fill volume range
• Required accuracy and how you check it
• Target output in filled containers per hour
• Capping type, labelling and coding requirements
• Cleaning method and any hot-fill or aseptic requirement
• Power, compressed air and available space

Where it sits in a line

The filler receives product from a juice processing line, sauce processing line or edible oil filter. A pasteurizer or jacketed cooking kettle often sits directly upstream, and a CIP cleaning system can clean tanks and filler pipework. After capping, an in-line checkweigher verifies fill.