Types of Belt Conveyors We Manufacture

Flat belt conveyor:

Horizontal or near-horizontal transport of packaged goods, granules, and processed material. Used extensively in food processing, pharmaceutical packing lines, and general factory material flow.

Troughed belt conveyor:

The standard configuration for bulk solids. Three-roll idler sets form a trough (20°, 35°, or 45°) that contains the material and increases capacity per unit width. Used in cement, fertilizer, chemical, and ETP sludge handling.

Inclined belt conveyor:

Designed for elevation changes up to 30°. Inclination angle depends on material characteristics – dry granules allow steeper angles; wet or fine-powder materials require shallower inclinations or chevron belting to prevent rollback.

Reversible belt conveyor:

Belt runs in both directions to discharge at either end. Suited for stockpile management and storage filling in fertilizer and chemical bulk handling.

Slider bed belt conveyor:

Uses a flat metal plate under the carrying surface instead of idler rollers. Suitable for lighter loads where low noise and smooth transport are priorities.

For material handling applications that involve elevation changes, long horizontal runs, or transfer between equipment, a belt conveyor is often the lowest-maintenance solution in the chain. We also manufacture screw conveyors and pneumatic conveying systems – so when your project needs multiple conveying modes, you work with one engineering and supply source.

Belt Material Selection by Application

Choosing the wrong belt material is one of the most common causes of early belt failure. The right selection depends on what you are conveying, the operating temperature, and any chemical exposure.

Rubber (multi-ply, IS 1891): Standard choice for dry bulk solids, granules, and non-corrosive powders. Handles abrasive materials well. Operating temperature typically up to 60°C (higher grades available for heat-resistant applications, e.g. hot clinker in cement).

PVC (polyvinyl chloride): Lighter and more flexible than rubber. Suited for moderate loads in indoor environments — packaging lines, light granule handling. Not suitable for outdoor, high-temperature, or abrasive applications.

Polyurethane (PU): Chemically resistant, easy to clean, and approved for direct food contact. The standard selection for food processing and pharmaceutical belt conveyors where hygiene and cleanability matter. FDA-compliant grades available.

Acid/chemical-resistant rubber: For ETP and STP sludge transport, chemical plant slurry handling, and environments with spillage of acids or alkalis. Special compounding resists degradation from pH exposure.

If you are unsure which belt grade is correct for your material, share your material safety data sheet (MSDS) or process parameters with our team. We will confirm the right specification before quoting.

Key Components and What They Affect

Understanding what each component does helps you evaluate proposals from multiple vendors.

Drive pulley: Transfers torque from the motor-gearbox to the belt. Lagging (rubber coating on the pulley surface) increases friction and reduces slip — especially important for inclined conveyors and wet applications.

Tail pulley: Located at the feed end. The belt wraps around it and returns. Clean-up scrapers are typically mounted here to prevent material carryback on the return strand.

Idler rollers (IS 8531): Support the carrying and return strands of the belt. Trough idler sets shape the belt into a concave profile for higher bulk capacity. Self-aligning idlers are used to correct belt tracking issues.

Take-up unit: Maintains correct belt tension throughout the system’s life. Three common types: screw take-up (fixed, low cost, requires periodic manual adjustment), gravity take-up (automatic, uses counterweight, suited to longer conveyors), and hydraulic take-up (for very long or high-tension systems).

Belt scrapers: Primary and secondary scrapers remove material stuck to the belt face after discharge. Neglecting this leads to material build-up on return rollers, belt misalignment, and structural frame damage.

Motor and gearbox selection: Drive power is calculated from belt speed, load, and friction. We use standard IE2 / IE3 motors with helical or worm gear reducers. Variable frequency drives (VFDs) can be specified for applications requiring variable belt speed.

Industry Applications

Belt conveyors from AS Engineers are used across these sectors:

• Chemical plants: Transporting bags of raw material, moving filter cake from bag filters to storage, conveying granular chemicals between process stages
• Cement and mineral processing: Clinker conveying, raw meal transport, packing line discharge — with heat-resistant belting where required
• Fertilizer plants: Granule conveying from dryer discharge to bagging lines, with dust-tight skirt board design to control spillage
• Food processing: Conveying sugar, salt, grains, and dried food products with food-grade PU belts and SS 304 / SS 316 structural frames
• Pharmaceuticals: GMP-compatible belt conveyors for tablet/capsule transport between processing stations, with smooth surfaces and quick-release components for cleaning
• Water treatment and ETP/STP: Dewatered sludge cake transport from filter press or sludge dryer discharge to skip or storage

Why AS Engineers

AS Engineers has supplied material handling equipment since 1997 across chemical, pharma, food, and industrial plants. Our belt conveyors are part of a broader material handling offering that includes screw conveyors, pneumatic conveying systems, and complete material conveying system packages.

When your project needs more than one conveying method, working with a single vendor simplifies interface responsibility, reduces coordination overhead, and means one point of contact from design through commissioning.

Every belt conveyor we supply is:

• Designed to your specific belt width, speed, inclination, and material parameters
• Fabricated to IS 11592 design standards
• Inspected and documented with dimensional and material test certificates on request
• Backed by a team that can service and supply spares after commissioning

Frequently Asked Questions

What belt width and capacity ranges does AS Engineers manufacture?

We manufacture belt conveyors with belt widths from 300 mm to 1,800 mm. Throughput capacity depends on belt width, speed (0.5–3.5 m/s), trough angle, and material bulk density. Share your material type and required throughput in tonnes per hour when enquiring – our team will calculate the correct belt width and speed combination.

Which belt material is correct for chemically aggressive or wet materials?

For applications involving acids, alkalis, or ETP sludge, we specify acid/chemical-resistant rubber belting. For food processing and pharmaceutical applications, polyurethane (PU) belting with food-grade certification is the standard choice. We confirm belt material selection based on your material’s MSDS and operating conditions before fabrication.

Can AS Engineers supply a complete material handling system – not just the belt conveyor?

Yes. We manufacture screw conveyors, pneumatic conveying systems, and belt conveyors under one roof. For projects requiring multiple conveying modes – for example, a screw conveyor feeding a belt conveyor with a pneumatic takeaway – we handle the complete system from design to supply.

What standards govern belt conveyor design and components in India?

IS 1891 covers rubber conveyor belting. IS 8531 covers idlers and idler sets. IS 11592 is the design code for belt conveyor selection and use. Our conveyors are designed and fabricated in accordance with these standards. Component test certificates and dimensional inspection records are provided on request.

What is the typical delivery lead time for a custom belt conveyor?

Lead time depends on belt width, length, and drive configuration. Standard configurations in our production range typically dispatch in 4–6 weeks from drawing approval and advance payment. Complex systems with longer spans, special belt grades, or integrated drives may require 6–10 weeks. We confirm lead time with every quotation.

Specify Your Belt Conveyor with AS Engineers

Share your conveying requirement – material, throughput, belt length, inclination, and any special operating conditions – and our team will return a specification and quotation within 48 hours.

Get a Quote | Call us: +91 99090 33851 | +91 82386 77554 | info@theasengineers.com