Heat Resistant Conveyor Belts Clinker, Sinter, Coke and Foundry Sand
Heat resistant conveyor belts 200-1250 N/mm with heat-stable EP carcass for clinker, sinter, coke and foundry sand. DIN Z cover grade, built to your spec.
A heat resistant belt is a fabric carcass belt with a cover compound that survives hot material without hardening, cracking or delaminating. The carcass itself is also stabilised, because ordinary fabric loses strength at temperature even when the cover survives.
The failure pattern is different from an abrasion failure. A heat-damaged belt does not wear thin - it cracks, and the cracks run through the cover into the carcass. That is why the cover grade and the temperature have to be specified together, not inferred from the material name.
What You Are Actually Getting
| Parameter | Specification |
|---|---|
| Tensile range | 200 - 1250 N/mm |
| Carcass | EP with heat-stable construction |
| Cover | Heat resistant compound, DIN grade Z in the DIN 22102 system |
| Application | Cement clinker, sinter, coke, foundry sand |
| Splice | Hot vulcanised preferred on heat duty - a failed splice on a hot belt is the usual way a heat belt dies |
| Related roller spec | C4 bearing clearance and lithium complex grease to +160 C on the idlers under a hot belt |
| Standards | DIN 22102 / EN ISO 14890, AS 1332, JIS K 6322 depending on destination |
Heat Duty Is a System, Not Just a Belt
A heat resistant belt running over standard idlers and pulleys will still fail early - just somewhere else. This is what else has to change.
| Component | Standard build | Heat duty build | Why |
|---|---|---|---|
| Belt cover | DIN Y / W | DIN Z heat grade | Standard covers harden and crack at temperature |
| Belt carcass | Standard EP | Heat-stable EP | Fabric loses strength at temperature even under a sound cover |
| Idler bearing | C3 clearance | C4 clearance | Thermal growth closes a C3 clearance and the bearing seizes |
| Idler grease | Lithium to +120 C | Lithium complex to +160 C | Standard grease cooks out and leaves the bearing dry |
| Idler shell | Standard paint | Uncoated or heat-suitable finish | Paint burns off and the shell corrodes under it |
| Splice | Any method | Hot vulcanised | Mechanical fasteners and cold bond are the first thing to fail on hot duty |
The belt is one part of a heat specification. Sending the belt alone onto a standard conveyor moves the failure rather than removing it.
What Actually Kills a Heat Belt
The cover cracks, it does not wear
Heat damage shows as a network of fine cracks that reach the carcass. Once the carcass is exposed it fails quickly, which is why heat belts appear to fail suddenly after months of looking fine.
Temperature is not one number
Material temperature at the loading point, the belt's own temperature in service and the ambient temperature are different figures. The loading point is normally the peak, so tell us the material temperature at the chute.
The loading point is the exposure
A hot belt is hottest where material lands. Impact rollers there take both heat and shock, which is the worst combination for a bearing - hence C4 clearance.
Carcass strength drops before the cover fails
A heat-stable carcass costs more, but a standard carcass under a heat cover is a belt that will fail at the splice or be derated in service.
Splice choice matters more here
A hot belt flexes at the splice and the joint is the weakest thermal path. Hot vulcanised is the default; anything else is a calculated risk.
Where Heat Resistant Belts Are Specified
- Cement clinker — Hot, abrasive, angular. Heat grade cover plus W-level abrasion resistance is the usual combination.
- Sinter and coke — Hot and abrasive, often with a high drop. Check impact protection at the same time as the belt.
- Foundry sand — Hot and fine. Belt cover plus sealed idlers, because the fines get into everything.
Heat Resistant Conveyor Belts FAQ
What temperature can a heat resistant belt take?
It depends on the compound and on whether the exposure is continuous or intermittent, and suppliers rate it differently. Tell us the material temperature at the loading point and whether it is steady or cyclic, and we will confirm the grade rather than quote a single headline number.
Do I need special idlers for a hot belt?
Yes. C4 bearing clearance and lithium complex grease to +160 C, and a finish that will not burn off. Otherwise the idlers fail while the belt is still sound.
Can a hot belt be spliced mechanically?
It can be, but it should not be. The splice is the weakest thermal path on the belt and the first place heat damage appears. Hot vulcanised is the standard on heat duty.
DIN Z or something else?
Z is the heat and oil grade in the DIN 22102 system. If the material is hot and abrasive, the cover has to satisfy both requirements at once - tell us both and we will match the compound.
How Orders Run
T/T — 40% deposit with order, 60% balance before shipment. L/C at sight accepted for container orders.
Quoted per order. The schedule depends on the drawing, the quantity and the material — we state a firm date with the quotation instead of a catalogue figure.
15 months from B/L date against manufacturing defects. Claims supported by photos and batch number.
Packing, minimum order and Incoterms are set out in full on the quotation page.
Heat Resistant Conveyor Belts Built to Your Drawing
Send the belt width, the duty and, if you have one, the drawing. We will specify it, quote within 24 hours, and ship samples in 2–3 days.
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