Belt Type: BV – VT (EP Carcass)

Industry: Oil & Gas, sulphur handling
Location: Middle East
Brief details of conveyor/application: Sulphur pelletizing plants
Type of material carried: Sulphur pellets
Type and specification of Dunlop belt supplied: BV-VT with EP carcass (various types and widths)
Current operating life of Dunlop belt: Between 2 and 7 years. 2 years under the most severe conditions, up to 7 years for the more moderate conditions
Type and specification of belt previously used: Many different types from several manufacturers
Manufacturer: Semperit, Metso, Indian, Japanese
Average life of competitors belt – months Some less than one year, others 2 or 3 years. Generally about half the lifetime of Dunlop BV-VT
Background story – general explanation of circumstances: Hot sulphur is pelletized from molten sulphur and the pellets come out from the pelletizing units in a wet condition. The water contains medium/low concentrations of sulphuric and sulphurous acid. Because BV-VT EP belting is chemically resistant and sufficiently heat resistant under these conditions, it is providing a very good operational lifetime. BV-VT also has good oil resistant and anti-static properties and complies with the required ISO 340 and/or MSHA flame retardant standards. BV-VT is also sulphur resistant. Sulphur is used for many rubber types as an accelerator in the vulcanising of rubber. Normal belts will become hard and start to crack after a short while under these conditions. When the belting is cracked, there are problems with carry-back and carcass deterioration through penetrating acid. Splice failures can also occur. BV-VT will also crack (but only under the most severe conditions) as the process is much slower than with ordinary belts. Under more moderate conditions, downstream in the material handling process and for stacking / reclaiming and ship-loading, there is no significant cracking in BV-VT and the belting is simply being replaced, either when there is mechanical damage or when the belting is worn out.