| OBSERVATION |
CAUSE |
RECOMMENDATION |
| Depressions in cover that appear soft or spongy. |
Mildew growth. |
All belts should be treated with mildew inhibitors. |
| Destruction due to acid, alkali, or other chemicals present in the material handled. |
Specify cord belt for replacement. Each cord is completely surrounded by rubber to give maximum protection against chemicals. |
| Softening and swelling of top cover. |
Oil, grease and solvents from material or conveyor equipment. |
Specify Oil Service Medium, Oil Service Neoprene, or Hycar belt for replacement. (Proper choice depends upon smount and type of oil present) Use equal cover thickness so that belt can be turned over. When damage is due to oil and heat, specify Hot Service Neoprene. |
| Softening and swelling of back cover along a line corresponding to the juncture of the troughing rollers. Some cover separation in serious cases. |
Overgreasing of troughing rollers. Belt picks up grease that accumulates on the idlers. |
Avoid this practice. Warn maintenance men about the dangers of overgreasing. |
| Hardening, cracking, and separation of the top cover. Deterioration and loss of strength of carass. Ply separation. |
Handling of materials at high temperatures. |
Specify Hot Service. Solarflex or Super Solarflex belt based on material temperature, size, and abrasiveness. Includes a longitudinal nylon breaker in top cover to retard the tendency to break off. If temperatures are extremely high use a glass fabric belt. |
