A telescopic loading spout should be selected together with material flow, filling rate, stroke, filter connection, and level control to reduce dust escape during silo, tanker, or truck filling.
What Does a Telescopic Loading Spout Do?
A telescopic loading chute is used to transfer bulk material into trucks, tankers, big bags, or open stockpile areas in a controlled way with less dust escape. When correctly selected, it reduces the dust load in the operator's area, lowers product loss, and improves environmental control at the filling point.
Hantech does not view this equipment merely as a fabric bellows or mechanical chute; it evaluates it together with the top feed, bottom discharge, filter/extraction connection, level sensor, winch mechanism, material abrasiveness, and filling rhythm.
Selection Criteria
| Criterion | Why does it matter? | Control |
|---|---|---|
| Material type and density | Determines flow, wear, and blockage risk | Dust/particle size, moisture, and temperature are required |
| Filling flow rate | Affects bellows diameter and extraction requirements | Verified on a t/h or m³/h basis |
| Stroke and vehicle height | Determines the bellows' working stroke | Min-max fill level is measured |
| Filter/aspiration connection | Affects dust-free filling performance | Return suction flow rate and connection diameter are checked |
| Level sensor | Reduces overflow and operator error | A sensor is selected to match the material type |
I Would Not Choose a Standard Bellows Under These Conditions
Worked Example: Initial Sizing at a Filling Point
Sample pre-check
- Material
- Dry mineral powder
- Filling capacity
- 80 t/h
- Vehicle type
- Enclosed tanker + open truck variable
- Risk
- Two different fill heights and dust backflow
- First decision
- Stroke range, bottom cone type, level sensor, and extraction connection are selected together.
In this example, selecting only the bellows diameter is not enough. Return-air behavior differs for closed tankers versus ambient dust dispersion for open trucks; if the same filling point serves both usage scenarios, the mechanical and aspiration design must be made accordingly.
Information Required for a Quote
For a telescopic loading spout, the material name, particle size, density, temperature, humidity, filling capacity, stroke distance, connection size, vehicle/container type, level sensor requirement, current equipment photos, and expected dust control level should be shared. For the related product family, transport groups and spare parts solutions can be reviewed, or technical information can be submitted via the quote form.
Frequently Asked Questions
Does a telescopic loading spout provide completely dust-free filling?
Can significantly improve dust control; however, performance depends on the material, fill rate, aspiration, connections, and operator use.
Is a level sensor required?
Should be strongly considered for fillings with overflow risk or limited operator visibility.