What Can Different Rubber Triangular Belt Grades Do?

When looking at rubber triangular belts, on the surface they all appear very similar. However, when designed and manufactured correctly, each different specification of rubber triangular belting can have special properties to suit particular applications. The following different rubber gra

When looking at rubber triangular belts, on the surface they all appear very similar. However, when designed and manufactured correctly, each different specification of rubber triangular belting can have special properties to suit particular applications. The following different rubber grades follow the ISO 433 standard.

  Abrasion-resistant rubber, also known as Grade A, is used when the conveyed material is very rough and abrasive, and causes the rubber to wear from the belt too quickly. The conveyor’s specific cleaning system, such as brushes, scrapers and/or conveyor skirting, can also contribute to triangular belt wear.

  Grade A rubber is used when the wear of the triangular belt would occur too quickly when using general purpose grades. Even though Grade A rubber is more costly than general purpose grades, the cost of removing and installing replacement belts frequently can be excessive. Therefore, it may be more cost effective to go with a higher-wear rubber.

  An example of when you would use Grade A rubber belt would be on an iron ore conveyor. Iron ore is a very abrasive material and would wear away standard rubber quickly. Grade A rubber would give the triangular belt a greater life and more up time on the conveyor.

  Grade E – Static Electricity Conducting

  As the name suggests, static electricity conducting rubber triangular belting conducts static electricity produced during the transport and conveying process, and discharges the electric charge – usually into a grounding path.

  Minimising sparks from static electricity is a necessity when in the presence of potentially explosive materials such gases, liquids, powder and dust because the risk of explosion can be deadly.

  A common use of Grade E rubber belting is at a aluminium refinery. Aluminium can commonly discharge excess electrons which can cause a static electricity build up. Static electricity conducting belts are used to absorb the excess electrons and discharge them safely.

  Grade F – Fire Resistant

  Fire-resistant belting is usually used when transporting heated materials. Rubber has natural properties which can be ignited and burn.

  Grade F rubber belting has added properties which increase the ignition temperature and increases resistance to fire.

  An example of the use of Grade F rubber belts are at underground mines, coal mines and power stations. If a rubber triangular belt were to catch underground, the smoke and air hazards could be potentially fatal, therefore fire-resistant belts are usually used to mitigate the risk.

  Work at coal mines and power stations involve heat processes. Fire-resistant belts help to reduce the risk of the heated process causing the triangular belt to ignite.

  Grade M N – General Purpose

  General-purpose rubber is the most common type of rubber triangular belt and is used when special properties are not needed to suit an application.

  Grade N rubber is lower quality compared to Grade M. Grade M rubber has greater hardness, is more abrasion-resistant and is superior in strength when compared to Grade N. Therefore the only difference between Grade M and Grade N rubber is the quality of the rubber.

  Grade S – Static Electricity Conducting and Fire Resistant

  This is a combination of both Grade E and Grade F rubber. Grade S rubber triangular belts are both static electricity conducting and fire-resistant. The reason this combination exists is because combination is the commonly used.

  Grade Z – Special Properties

  Grade Z rubber belting is a specially designed triangular belt to suit a particular purpose. This grade is used when the rubber properties do not fit in any of the other categories.

  Combined Grades

  More than one grade can be used on a single rubber hexagonal belts. For example, Grade MA rubber is both general purpose and abrasion resistant.


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