Fire resistant belts Depreux are intended for operation in underground mines excavating flammable and non-flammable minerals, in methane or non-methane areas, classified to “a”, “b” and “c” of methane explosion category and in the excavations classified to “A” and “B” of coal dust explosion hazard.
They meet high requirements related to heat resistance, anti-static electricity and safety in accordance with the requirements of the Stage Mining Authority (WUG) in Poland what is confirmed with documents approving belts for use.
Fire resistant belts meet also international requirements as :
- EN14973 in Europe
- MSHA in the USA,
- VVUU Czech Republic,
FIRESHIELD / DX FLEX conveyor belting, is thinner in construction in order to reduce the required minimum diameter of the pulleys in the conveyor system. Reducing the physical size of the pulleys making for easier installation—an advantage in restricted areas such as those often required in tunnel and mining applications. The smaller required sizes also reduce the costs of the pulleys. Reducing the size of all of the pulleys throughout the conveyor system can dramatically reduce the overall costs of the conveyor.
The main feature of this belt is that it is the lightest and the thinnest in all textile and steel options ; thanks to the properties of the aramid yarn which has 3 times more strength (or tenacity) than a polyester yarn for the same weight , and roughly three time less elongation. Compared to steel construction, it is naturally much lighter, and its elongation is in the same order of magnitude as steel.
A major advantage over ply belts is that Solid woven belts need smaller drum diameters. The advantage over steel-cord belts is that PVC/FIREMASTER belts usually need less power to function.
Steel cord bets are preferred to textile or solid woven belts in the following situations :
- when the required tensile strength is high and the conveyor is narrow. The superior troughing capabilities of steel cord belt are suited to conveyors typically found in long overland conveyor systems, such as those between a mine and a power plant or steel works or tunnelling projects
- when a very low elongation of the belt is required.
- when the life expectancy for the belt is the prime objective.