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How does a net weight filler work?


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Kinnek Knowledge Team

A net weight filler weighs the product being filled prior to filling the containers. They are popular for powders and dry products such as rice, beans, and nuts, but can also be used for filling liquids into bulk containers, such as 5 gallon buckets.

Oct 15, 2013

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Kim Doble from DTM Packaging, LLC

Many manufacturers have moved away from net weigh liquid filling in favor of flow meter filling.  Net weigh fillers usually tare the bottle, fill to a pre-set weight, and then check to make sure the final weight is within the target range.  When evaluating net weigh fillers it is essential to ensure that the weight displayed actually matches the weight in the bottle.  It is important to understand long term maintenance costs of net weigh fillers, particularly with the electronics. 

Nov 13, 2013

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Jim Slamon from MRM Elgin - Cozzoli Machine Company

We commonly see net weigh fillers at paint companies- where they take the filler out of service after a few years of very harsh and continuous duty.
Consider adding a belt-type weigh cell to your line after filling and capping. Assuming your containers are of similar weight when empty, these are reasonably priced and can alarm when out-of-range, reject under fills for 'top off', and can provide feedback to the filler if the weight trend changes. Much more cost effective!

Dec 16, 2013

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Marco Solferini from IC Filling Systems

Your choice of filling method will depend on the product to fill.
For example oil filling (any type) is best filled by weight as its volume expands and contracts with variations in temperature and flowmeters do not like to measure oil. Oil was sold in the last century by weight not volume.
For fresh fruit juices, milk or other protein based drinks that require high cleanliness non contact (flowmeters or weight filling) is preferred.
If you have a specific request for a quotation, send me a message!

Nov 14, 2013

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Charles Wood from Crandall Filling Machinery, Inc.

A net weight filler uses a weight value as a means of shut off for filling various products liquid and solids. The filler will typically TARE the value of the container first (starting from 0), then fill to specific weight values or Set points. Most liquid fillers will have a least 2 set points, set point 1 would be the dribble flow weight value which when reached will automatically slow down your product in feed. The second set point will be the shut off weight value or TARGET value, when this value is reached the filling head will shut. Net weight filling is an excellent filling method for containers normally ranging from Pints all the way up to 55 gallon drums and Totes (IBC's). Our company (Crandall Filling Machinery, Inc.) specifically manufactures liquid filling machines and can/pail closing equipment. 

Nov 5, 2013

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