How to select the right Conveyor Belt for your bulk material handling application — a complete guide comparing steel cord, fabric, solid woven, heat resistant, fire resistant, and chevron belt types.

Choosing the right conveyor belt is one of the most critical decisions in any bulk material handling project. The wrong belt specification leads to premature failure, unplanned downtime, material spillage, and increased total cost of ownership. Yet with so many belt types available — steel cord, fabric, solid woven, heat resistant, fire resistant, chevron, and more — how do you know which one is right for your application?

This guide walks you through the key factors in conveyor belt selection: carcass type, cover grade, operating environment, and material characteristics. With over 20 years of experience in bulk material handling, ZOOMRY has supplied belts to mining, cement, port, and power generation operations across 100+ countries.

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What Are the Main Types of Conveyor Belts?

Conveyor belts are classified primarily by their carcass construction — the internal skeleton that provides tensile strength — and by their cover compound, which protects the carcass and determines suitability for specific materials and environments.

Belt Type	Carcass	Best For	Tensile Strength
Steel Cord Belt	Steel wire ropes	Long-distance, high-tension, high-speed	Up to 4,000 N/mm
EP Belt	Polyester warp + nylon weft	Medium-long distance, wet/humid conditions	EP-80 to EP-450
NN Belt	Nylon warp + nylon weft	High impact, high elasticity	NN-100 to NN-300
Solid Woven Belt	Single-layer woven fabric	Underground mining, fire safety mandatory	EP315 to EP1250
Patterned/Chevron Belt	EP or NN with molded pattern	Inclined conveying up to 45°	8-25 MPa

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How to Match Belt Carcass to Your Conveying Distance?

The conveying distance and elevation change determine the total belt tension, which directly affects which carcass type you need:

• Short to medium distance (under 2 km): Fabric belts (EP or NN) are the most economical choice. EP belts offer lower elongation for inclined conveyors; NN belts provide maximum impact absorption for heavy loading zones.
• Medium to long distance (2-10 km): Multiple-ply EP belts with higher tensile ratings (EP-250 to EP-450) handle moderate tensions. For inclined long-distance conveyors, EP belts are preferred due to their low elongation characteristics.
• Long distance (over 10 km): Steel cord belts are the standard choice. With tensile strength up to 4,000 N/mm and elongation below 0.25%, they minimize take-up travel and splice maintenance on overland conveyors.

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How to Select the Right Cover Grade for Your Material?

The cover rubber compound determines how well the belt resists abrasion, heat, fire, oil, and chemical attack. Here's how to match cover grade to your material and environment:

Material / Environment	Recommended Cover Grade	Belt Type
Coal, limestone, sand (standard abrasion)	12-15 MPa	EP or NN fabric belt
Iron ore, granite, quartz (high abrasion)	18-26 MPa	Wear-resistant EP or steel cord
Cement clinker, sinter, hot coke (up to 200°C)	Heat-resistant compound	Heat resistant belt (HR/SHR/UHR)
Underground coal, combustible materials	Flame-retardant, anti-static	Fire resistant belt (FR/FRU)
Chemicals, fertilizers, oils	Chemical/oil-resistant compound	Specialty EP belt with resistant cover
Inclined conveying (over 18°)	Patterned/chevron surface	Patterned belt or concave chevron

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EP Belt vs NN Belt: Which Fabric Belt Should You Choose?

Both EP and NN belts use fabric carcasses, but the fiber orientation creates distinct performance characteristics:

• EP Belt (Polyester-Nylon): Polyester warp fibers provide low elongation and high tensile strength. Nylon weft fibers provide troughability. EP belts are the preferred choice for most bulk handling applications — especially inclined conveyors, long-distance systems, and humid environments. Polyester resists moisture and mold growth, maintaining dimensional stability in outdoor installations.
• NN Belt (Nylon-Nylon): Nylon in both directions provides maximum elasticity and impact absorption. NN belts excel in applications with high impact forces at the loading point — such as primary crusher discharge conveyors. However, they exhibit higher elongation under sustained tension, requiring more take-up travel. Nylon absorbs moisture, so NN belts are less suitable for wet environments.

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When Do You Need a Specialty Belt?

Underground Mining: Fire Resistant Belts

In underground coal mines, solid woven PVC/PVG belts are the mandatory choice. Compliant with ISO 340 (flame retardancy) and ISO 284 (antistatic), these belts self-extinguish when the ignition source is removed. For surface applications with combustible materials, fire resistant FR grade belts provide flame-retardant protection at a more economical price point.

High-Temperature Materials: Heat Resistant Belts

When conveying clinker, sinter, hot coke, or foundry sand, standard rubber covers harden and crack within months. Heat resistant belts in HR (T1), SHR (T2), and UHR (T3) grades handle material temperatures up to 200°C continuous. For extreme applications like red hot clinker direct from the cooler, UHR grade belts with EPDM-based compounds provide maximum thermal protection.

Steep Inclines: Patterned and Chevron Belts

Standard flat belts lose grip on inclines above 18°. Patterned conveyor belts with chevron, herringbone, or concave V-groove profiles prevent material rollback up to 45°. The pattern type and height should be matched to your material particle size and conveyor angle — ZOOMRY's engineering team provides expert specification guidance.

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