HDF-S Series
Semi-Automatic Drum Filling System
Semi-automatic drum filling for 60–250 litre drums — operator positions the drum, the system handles the fill-to-weight.
Manufacturing
Built, installed & supported by HMT
Compliance support
Calibration & Legal Metrology guidance
System ready
Automation, ticketing & ERP integration
01Overview
The operator aligns the drum under the nozzle; the system doses to target weight automatically and retracts the nozzle as fill weight is reached, cutting the manual weighing/topping-off step out of the process.
02How it works
Fill-to-weight, not fill-to-volume
A volumetric fill dispenses a fixed volume regardless of what that volume actually weighs — but product density varies with temperature, batch formulation, and viscosity, so a fixed volume of two different batches can weigh noticeably different amounts. Filling to a weight target instead means the system doses until the load cell under the drum reads the target weight, which is accurate regardless of density variation, and is what actually matters when the product is bought and sold by weight.
Coarse and fine feed staging
Dosing at full flow rate all the way to the target weight risks overshooting past the target before the system can react and shut off — flow doesn't stop instantly. A two-stage fill, running at a higher flow rate for the bulk of the fill and switching to a slower, finer flow rate as the target approaches, lets the system land on the target weight accurately without either overshooting or taking unnecessarily long to complete the coarse portion of the fill.
Automatic nozzle dive and retract
The nozzle lowers ('dives') into the drum opening at the start of the fill to control splash and product loss, and automatically retracts once the load cell confirms target weight is reached — removing the operator's need to manually judge fill level or time the nozzle withdrawal, which is both a consistency improvement and a speed improvement over a fully manual fill.
03Manufacturing & build quality
The weighing base is fabricated with compression load cells sized to the drum weight range the system is built for, integrated into a platform stable enough to support a drum through the vibration and flow forces of an active fill without affecting reading accuracy. The nozzle assembly, including its dive/retract actuation and dual-stage flow control valve, is mechanically assembled and tested for consistent, repeatable positioning and flow-rate switching. The complete system — weighing base, nozzle assembly, and control logic tying load cell reading to valve and nozzle actuation — is functionally tested through full fill cycles with a reference load before being calibrated and shipped.
04Problems it solves
Volumetric overfill and underfill from density variation
A volumetric dosing system fills the same volume regardless of the batch's actual density, which means the same volume setting can produce drums that are measurably over or under target weight as product density shifts.
Manual topping-off slowing the line
Without automatic fill-to-weight control, an operator has to watch each drum and manually adjust or top off toward the target weight — automatic dosing removes that manual step and its associated line slowdown.
Product giveaway cost from consistent overfill
Erring toward overfill to avoid underfilling (a common manual-process habit, since underfill risks a legal net-weight violation) quietly gives away product on every drum — accurate fill-to-weight dosing tightens that margin without risking underfill.
Handling multiple drum and container formats on one line
Supporting 60–250 litre drums across HDPE, steel, and IBC tote formats means one system can serve a product line's full range of container sizes rather than needing separate dedicated equipment per format.
05Why it matters
For any operation filling drums at volume, the difference between consistent fill-to-weight accuracy and a volumetric system's density-driven drift adds up fast — a small average overfill across thousands of drums a year is real product given away for free, and underfill risk carries its own legal net-weight compliance exposure. Fill-to-weight dosing protects the margin on every single drum filled, and doing it with minimal operator judgment involved means that protection doesn't depend on how attentive any one operator happens to be on a given shift.
06Salient features
- Handles 60–250 litre drums (HDPE, steel, and IBC tote compatible)
- Automatic nozzle dive/retract on fill-weight target
- Load-cell weighing base, not volumetric — corrects for product density variation
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
What accuracy can we expect from fill-to-weight dosing?
Accuracy depends on load cell capacity relative to fill weight and the fine-feed stage's flow control precision, but weight-based dosing is inherently more accurate across varying product density than a volumetric system, which is the core reason to choose it.
What drum sizes does it handle?
The system is built for 60–250 litre drums, compatible with HDPE, steel, and IBC tote formats.
How long does it take to change over between different container formats?
Changeover time depends on how different the container geometries are and whether nozzle positioning needs adjustment — your supplier can advise on the specific changeover procedure and typical time for your product mix.
What kinds of products can it handle — viscous or corrosive fluids?
The weighing and dosing principle works across a wide range of liquid products; specific wetted-part material compatibility (for viscous or corrosive product) should be confirmed against your particular product before ordering.
What throughput rate is realistic?
Throughput depends on drum size, product viscosity, and how much operator involvement remains in positioning — this being a semi-automatic system, cycle time includes the manual drum-positioning step, unlike a fully automated line.
10Industries this serves
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