Filling Machines for Chemicals and Cleaning Products: Bleach, Detergents and Corrosive Liquids
A chemical filling machine is specified differently from a food or cosmetic filler, and the difference is not speed. Bleach eats stainless steel. Detergents foam. Thick gels will not pour. Solvents attack seals. A filler that runs juice all day can be ruined by a week of hypochlorite. This guide covers filling machines for chemicals and cleaning products in Australia: what changes in the machine, which filler suits which product, how the capping and labelling stages differ, and what to have ready before you ask for a quote.
Why chemicals need a different filling machine
- Corrosion: sodium hypochlorite bleach, acids and some sanitisers attack stainless steel and standard seals. Contact parts have to be chosen for the product.
- Foaming: detergents, dishwashing liquid and surfactant-based cleaners foam when filled quickly, which means overfills, short fills and product on the outside of the bottle.
- Viscosity: the range runs from water-thin disinfectants to thick bleach gels and fabric softeners, and one dosing method does not cover all of it.
- Container range: the same product often ships in a 500 mL trigger bottle, a 1 L or 2 L bottle and a 5 L jerry can, so the filler has to move between them with a recipe change.
- Accuracy: declared-volume packs have to meet trade measurement rules, and overfilling a cheap product in volume adds up.
Wetted parts: the specification that matters most
The wetted parts are everything the product touches: the tank, pump, valves, seals, hoses and nozzles. On a food filler they are stainless steel. On a chemical liquid filling machine they are selected against the product, and confirmed against your safety data sheet before the machine is built. For bleach and other hypochlorite products, the Nexus bleach line filling system has every contact part and the buffer tank made from UPVC, which does not corrode in bleach, with an individual servo-driven piston pump per head and a filling range from 500 mL to 5 L. Detergents, disinfectants and most cleaners run on stainless steel with seals chosen for the formulation. Solvents and industrial coatings need seal materials checked against the solvent.
Which filler for which chemical product
| Product | What makes it hard | Filler type |
|---|---|---|
| Bleach, hypochlorite sanitisers, acid cleaners | Corrosive to stainless steel | Servo piston filler with UPVC contact parts |
| Dishwashing liquid, laundry liquid, surface cleaners, disinfectants | Foaming, thin to medium viscosity | Overflow filler for a level fill in clear bottles, or a servo piston filler for volumetric accuracy |
| Fabric softener, thick bleach gel, hand wash, car wash concentrates | Viscous, sometimes shear-sensitive | Piston filler or rotary lobe pump filler |
| Solvents, high-value concentrates, agricultural chemicals | Accuracy and traceability | Mass or magnetic flow meter filler, accurate to about 1 percent |
| Oils, lubricants, additives | Medium viscosity, wide container range | Servo piston or gear pump filler |
The filler type is only half the decision. Line layout follows: an in-line filler for a straight conveyor, a rotary system for higher speed, or a mono-block that fills and caps in one frame. Our guide to choosing a liquid filling machine compares the filler types by viscosity and volume.
Capping trigger sprayers, pump caps and jerry cans
Cleaning products are where trigger sprayers live. The sprayer has a dip tube that must be guided into the bottle neck before the collar is tightened, which a standard screw capper cannot do. The Nexus trigger sprayer and pump cap capping machine pairs a vibratory cap sorter with a vision-guided pick and place head and runs up to 40 containers per minute. Screw caps on bottles and jerry cans run on the entry-level automatic capper at up to 20 per minute or the high-speed in-line capper at 40. For short runs, the semi-automatic benchtop capper tightens screw caps and trigger sprayers one at a time, on containers up to 5 L jerry cans.
Labelling chemical containers
Chemical labels carry hazard pictograms, safety directions and batch information, and they have to stay legible after contact with the product. A labelling machine applies front and back or wrap-around labels on round bottles and jerry cans; the Nexus all-in-one labeller handles 5 L jerry cans and round bottles at up to 50 per minute. Where the batch number and date are printed onto the label at the time of application, a print and apply system or a thermal transfer printer does the printing, and the ribbon has to be full resin so the code survives chemical contact and abrasion. A continuous inkjet printer codes the bottle directly where no label is needed.
Powders, sachets and pouches
Cleaning and chemical powders, from laundry powder to pool chemicals, are dosed by an auger on a powder filling machine, with contact parts and dust control chosen for the product. Single-dose detergent and sanitiser sachets run on a sachet packing machine, which forms, fills and seals the sachet from film with a piston head for liquids or an auger for powders. Refill pouches of liquid cleaner run on the rotary pouch filling machine, which is built for sauces, beverages and chemicals in premade pouches.
Small batches and new chemical products
A contract packer or a new cleaning brand does not need a multi-head line. The semi-automatic filling machine with a gear pump handles thin to medium cleaning liquids, a piston pump handles gels, and the nozzle height adjusts for containers from small bottles to 20 L jerry cans. It runs at operator pace, a few hundred containers an hour, and pairs with the semi-automatic capper and labeller as a benchtop line. When volume grows, the automatic filler takes over and the benchtop unit stays for trials.
What to have ready before you ask for a quote
| Item | Why |
|---|---|
| Safety data sheet for each product | Sets the wetted-part materials and seal compounds. Nothing is specified without it. |
| Viscosity, and whether the product foams | Sets the filler type and fill speed. |
| Every container size, with samples | Sets the nozzle, the head spacing and the change-part count. |
| Cap types, including sprayers and pumps | Sets the capping head and whether a dip-tube guide is needed. |
| Target containers per minute, now and in two years | Sets head count and whether the line is in-line, rotary or mono-block. |
Chemical filling lines supplied Australia-wide
Chemicals and cleaning products are among the industries Nexus Australia is growing in. Nexus supplies, installs and commissions filling, capping and labelling machines Australia-wide, with installations in the last three years in Perth, Melbourne, Shepparton, Sydney, Brisbane and Adelaide, and its own technicians travel interstate. Every machine is built to the product and container, so lead time to shipment is around 75 days for a standard machine and 90 to 120 days for a complex line. Machines carry a one-year return-to-base warranty, common spare parts are held in Australia, and remote support by phone and video call is free.
Frequently asked questions
Can a stainless steel filling machine fill bleach?
Not for long. Sodium hypochlorite corrodes stainless steel and standard seals. A bleach filler uses UPVC or similar corrosion-resistant contact parts throughout, including the buffer tank.
Can one filler run bleach and a detergent?
If the contact parts are specified for the more aggressive product, yes, with a flush between products and a recipe change for the dose. The materials have to be checked against both safety data sheets before the machine is built.
How accurate is a chemical liquid filling machine?
Servo piston and flow meter fillers hold fills to around 1 percent, which covers declared-volume requirements. Overflow fillers fill to a level rather than a volume, which is what you want for a clear bottle on a shelf.
What is the largest container a chemical filler handles?
The automatic bleach line fills 500 mL to 5 L, and the semi-automatic filler handles containers up to 20 L. Ask about larger formats.
Related machines and guides
- Liquid filling machines
- Nexus bleach line filling system
- Capping machines
- Labelling machines
- How to choose a liquid filling machine
- Bottle filling line explained
Send Nexus Australia the safety data sheets, container samples and target output for your products, and the team will specify the wetted parts, filler and capper. Contact Nexus Australia for a quote.
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