Designation Basic material
NN400 4 ply Heat resitant conveyor belts
P Nylon (synthetic yarns)
E Polyester (synthetic yarns)
EP Polyester-Nylon (synthetic yarns)
F Steel fabric FERROFLEX
D Aramide (synthetic yarns)
Steel fabrics
| Grade | Tensile Strength | Elongation at Break | Maximum Abrasion Loss | Polymer / Rubber | Working Temperature Range | Application |
| Heat Resistance | Mpa | % Minimum | MM3 | Degrees | ||
| HRT1 | 12 | 350% | 200 | SBR Blend | + 100 Max for Fines | For hot materials such as crushed cement, foundry sand, fertilizers, clinker, coke etc. |
| + 125 Max for Lumps | ||||||
| HRT2 | 12 | 350% | 180 | SBR Blend | + 125 Max for Fines | For hot materials upto 150 deg. Centigrade such as crushed cement, foundry sand, fertilizers, clinker, sinter, slack, coke etc. |
| + 150 Max for Lumps | ||||||
| HRT3 | 13 | 350% | 130 | EPDM | + 150 Max for Fines | Very hot & abrasive materials as above upto 200 deg. centigrade |
| + 200 Max for Lumps |
Standard widths in mm:
300, 400, 500, 600, 650, 800, 1000, 1200, 1400, 1600, 1800, 2000 and 2200
The permitted tolerances on standard belt widths according to international standards are:
Belt width 300-500 mm ± 5 mm
Belt width 600 or wider ± 1 %
There are two Ferroflex constructions available – ‘FIW’ and ‘FSW’. Both have a tension layer
composed of longitudinal steel cords through which power transmission is effected. The FIW
carcass has a single transversal layer of steel cords on top of the longitudinal steel cords,
whereas the FSW has two transversal layers of steel cords situated at both sides of the
longitudinal steel cords. The transverse steel cords reinforce the belt and also protect
against impact and tears, providing excellent reliability and durability. Due to the reduced
elongation of the steel fabric, it is particularly suitable for long distance conveyors. The steel
fabric is also very well suited to function in high heat applications.