HBF Series
Bag Filling System
Packaged bag filling system for standard 25–50kg bags — cement, grain, fertilizer, and similar bulk-packaged products.
Manufacturing
Built, installed & supported by HMT
Compliance support
Calibration & Legal Metrology guidance
System ready
Automation, ticketing & ERP integration
01Overview
Fill-to-weight dosing for standard packaged bag sizes, typically paired with a bag-clamp filling spout and a load-cell weighing platform under the bag during fill.
02How it works
The bag-clamp spout does two jobs at once
The spout doesn't just direct product into the bag — the clamp seals around the bag's neck during filling, which both controls dust escaping around the fill point and holds the bag securely in position through the fill, so an operator isn't fighting to hold a filling bag steady by hand.
A weighing platform under the bag, not a timed dose
The bag sits on a load-cell weighing platform through the fill, and dosing continues until that platform reads the target weight — a materially more accurate approach than timing a fill based on an assumed flow rate, since product flow rate through a spout isn't perfectly constant, especially as the bag fills and back-pressure changes.
Sized for the standard packaged bag range
The system is built around the 25–50kg bag range that dominates cement, grain, fertilizer, and similar bulk-packaged goods — a scale and dosing speed matched to that specific weight range, rather than a general-purpose system trying to cover everything from small retail bags to jumbo bulk bags.
03Manufacturing & build quality
The weighing platform is built around load cells sized to the 25–50kg bag range, integrated into a stand or frame positioned directly under the filling spout. The bag-clamp spout assembly is mechanically engineered to seal consistently around a range of bag neck sizes and materials, with a dosing valve tuned for the flow characteristics of common packaged bulk products like cement, grain, and fertilizer. The complete station — clamp spout, weighing platform, and dosing control — is functionally tested through fill cycles at both ends of the bag weight range before calibration and dispatch.
04Problems it solves
Inconsistent manual bag weights
Manually filling and judging bag weight by eye or by a fixed scoop count produces meaningful bag-to-bag variance; automated fill-to-weight dosing tightens that variance considerably.
Dust escaping during filling
An unclamped or poorly sealed spout lets dust escape around the bag neck during filling — the clamp seal is specifically there to contain that at the source.
Slow manual weighing and tying cycle
A fully manual process — fill, then weigh, then adjust, then tie — is inherently slower than a system that doses directly to target weight and signals completion, removing the separate weigh-and-adjust step.
Product loss from spillage during handling
A securely clamped bag through the fill process reduces spillage compared to an operator manually holding an open bag under a free-flowing spout.
05Why it matters
Bagged commodities like cement, grain, and fertilizer are sold by declared weight at real volume — a small systematic overfill across tens of thousands of bags a year is a genuine cost, and underfill carries its own legal net-weight compliance exposure in most markets. A bag-clamp, fill-to-weight system tightens that tolerance without slowing the line down, which is exactly the trade-off a high-volume packaged bulk operation needs to get right.
06Salient features
- Standard 25–50kg bag sizing
- Fill-to-weight dosing, not volumetric
- Bag-clamp spout for clean, dust-controlled filling
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 bag sizes does it handle?
Standard 25–50kg bags, the typical range for cement, grain, fertilizer, and similar bulk-packaged products.
What throughput can we expect?
Throughput (bags per hour) depends on product flow characteristics and how much manual handling remains in your specific setup — your supplier can advise based on your product and desired bag weight.
Can it handle both granular and powdered products?
The core clamp-and-weigh principle applies to both, though dosing valve tuning differs between free-flowing granular material and finer powders — confirm your specific product against the system's configuration.
How long does changeover take between different bag sizes?
Changeover involves adjusting the clamp spout for the new bag neck size and resetting the target weight — a relatively quick adjustment compared to reconfiguring a fully automated multi-station line.
What maintenance does the clamp spout need?
The clamp seal is a wear component that will need periodic inspection and eventual replacement, given how many open/close cycles it goes through in high-volume operation — your supplier should specify an expected service interval.
10Industries this serves
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