HOF-S Series
Semi-Automatic Oil Filling System
Semi-automatic oil filling line for lubricants, edible oils, and industrial fluids — operator-assisted container handling, automated fill-to-weight.
Manufacturing
Built, installed & supported by HMT
Compliance support
Calibration & Legal Metrology guidance
System ready
Automation, ticketing & ERP integration
01Overview
Same fill-to-weight principle as the drum filling system, sized for oil-line container formats (cans, smaller drums, IBC totes).
02How it works
Why oils specifically punish volumetric filling
Oil's viscosity and density both shift noticeably with temperature — a batch filled at a warm ambient temperature can measurably differ in density from the same product filled on a cold morning. A volumetric fill locked to a fixed volume doesn't account for that at all, while fill-to-weight dosing measures the actual mass going into each container regardless of what temperature or viscosity did to the product that day.
Foam complicates level-based cutoff, not weight-based
Many oils foam during filling, especially at higher flow rates — a level-based fill-stop sensor can be fooled by foam sitting above the true liquid level, cutting off the fill early or triggering inconsistently. A load-cell-based system isn't affected by foam at all, since it's measuring the container's actual mass, not a liquid level.
Manual positioning, automated dosing
The operator's role is limited to placing and removing containers — cans, smaller drums, or IBC totes — while the dosing itself runs automatically to the weight target, which keeps the accuracy benefit of automated fill-to-weight without requiring a fully automated conveyor line.
03Manufacturing & build quality
The system is built around a load-cell weighing station sized to the container formats it will handle — typically a smaller-capacity, finer-resolution setup than a drum-only system, since cans and smaller containers need tighter increment control relative to their fill weight. The dosing valve and nozzle assembly are configured for oil's viscosity profile, since flow characteristics for oil differ meaningfully from water-thin liquids and affect how the coarse/fine flow staging is tuned. The complete station is functionally tested through fill cycles across the container range it's rated for, then calibrated with reference weights before dispatch.
04Problems it solves
Temperature-driven volumetric drift
Oil density shifting with ambient or product temperature causes a fixed-volume fill to under- or overfill by weight, inconsistently across a day or a season — fill-to-weight dosing isn't affected by that temperature variation.
Foam interfering with fill cutoff
A level-sensor-based cutoff can be triggered early or inconsistently by foam formed during filling — weight-based dosing measures true container mass regardless of foam.
Mixed container formats on one line
Handling cans, smaller drums, and IBC totes on the same station avoids needing separate dedicated fillers for each container size in a product line that ships in multiple formats.
Margin loss on high-volume commodity oil lines
Even a small average overfill percentage, multiplied across a high-volume oil-packing operation, represents real product given away — accurate fill-to-weight dosing protects that margin at scale.
05Why it matters
Oil is sold by weight in most markets, so the accuracy of the fill is directly tied to what's legally and commercially on the label — and because oil's physical properties are unusually sensitive to temperature and prone to foaming, it's exactly the kind of product where a volumetric or level-based fill system quietly drifts out of tolerance without anyone noticing until an audit or a customer complaint catches it. Fill-to-weight dosing removes that particular risk at the source, for both edible and industrial oil lines.
06Salient features
- Fill-to-weight accuracy, not volumetric
- Handles cans, drums, and IBC totes
- Manual container positioning, automated dosing
08Technical file
Need the full technical sheet?
Request drawings, model-specific details and project documentation from the HMT team. A downloadable product file will appear here once approved.
09Complete system
Plan beyond the deck.
A vehicle weighing point can combine the weighbridge with indicator, load cells, traffic management and H-Weigh software for an accountable end-to-end workflow.
08In the field
09Frequently asked
Does this work for both edible and industrial oils?
The fill-to-weight principle applies to both — the main consideration is confirming wetted-part material compatibility with your specific product, particularly for food-grade applications requiring food-safe contact materials.
What container formats can it handle?
Cans, smaller drums, and IBC totes are all supported — sized to the typical oil-line packaging formats rather than the larger drum range a dedicated drum filler handles.
How is changeover handled between different container sizes?
Changeover involves reconfiguring the nozzle position and weight target for the new container — your supplier can advise on typical changeover time for your specific format mix.
How does foam get handled during filling?
Because the system doses to a target weight rather than a level, foam forming during the fill doesn't affect the accuracy of the final fill — the fine-feed stage near target weight also helps minimize foam generation itself by slowing flow as the fill completes.
What accuracy is achievable for edible oil packaging compliance?
Weight-based dosing is capable of accuracy well within typical packaged-goods net-weight compliance requirements when the load cell capacity and increment are correctly matched to the fill weight — confirm your specific regulatory tolerance against the system's rated accuracy.
10Industries this serves
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