Zeal Roller Co., Ltd. imports and distributes rubber conveyor belts for various industries, including mining, chemical fertilizer plants, sugar mills, tapioca starch factories, palm oil mills, and other industrial applications.
The conveyor belts supplied include EP (Polyester–Polyamide) fabric belts such as EP120, EP160, and EP200, as well as steel cord belts for applications requiring high tensile strength and low elongation.
The rubber cover can be manufactured in various grades depending on the conveyed material, such as wear-resistant grade, heat-resistant grade, oil-resistant grade, and others.
When specifying a conveyor belt, we select the fabric or steel cord strength to adequately withstand the required tensile load without excessive overdesign, which would unnecessarily increase belt cost. Rubber cover thickness determines service life—the thicker the rubber, the longer the service life, but also the higher the cost. However, excessive thickness increases belt weight and system tension without real benefit, resulting in higher power consumption. Therefore, selecting the optimal rubber thickness is essential to achieve the lowest operating cost.
Rubber cover thickness can be specified according to customer requirements. It is not mandatory that a 3-ply fabric belt must have a total thickness of 7 mm, or a 4-ply belt must be 9 mm thick. Customers may choose thicker belts such as 10 mm or 12 mm to extend service life. Conveyor belts should have a minimum service life of at least 3 years under normal operating conditions (excluding accidental damage). If belts need to be replaced annually, please contact us. Our policy is not to deliberately select underspecified belts simply to increase replacement frequency.
We are pleased to provide consultation on belt selection, including calculation and design support, to help customers choose conveyor belts with the lowest total cost of ownership. Examples of guideline considerations for belt specification include:
- Selection to reduce spare parts inventory. In some cases, plants may choose to stock a single belt with a higher specification and longer length to reduce spare inventory costs.
- Selection based on operating conditions. Longer conveyor belts experience lower wear rates than shorter belts because the material loading point is encountered less frequently per cycle. Belt wear primarily occurs at the loading zone. Higher belt speeds increase wear rates. Belt feeders experience higher wear than standard conveyors due to the vertical pressure exerted by the material load, which increases abrasion against the belt surface.
- Selection based on production criticality. Even within the same plant, different departments have different levels of importance. Some departments produce stockpiled raw materials and can schedule maintenance freely, while others must operate continuously with limited maintenance windows. Shutdowns may affect product quality or cause serious environmental hazards. High-criticality departments therefore require more robust and durable equipment.
- Selection based on other conditions, such as remote plant locations or cross-border operations. Each shipment incurs transportation costs and import duties, so the most durable belt specifications are selected to maximize service life.
Conveyor belt grades are not mysterious and can be scientifically verified. Our company aims to ensure that customers understand the meaning and values behind belt grades and encourages testing by independent laboratories, rather than relying solely on manufacturer test results.
Common belt grades used in Thailand include general grade P, medium wear-resistant grade N, and high wear-resistant grade M (P, N, and M are legacy codes that are no longer widely used internationally). Under DIN 22102, grade P corresponds to DIN-Z, grade N to DIN-Y, and grade M to DIN-X. The primary difference among these grades is abrasive wear resistance, measured in mm³ (cubic millimeters). Lower values indicate better wear resistance.
The abrasion test method involves cutting a rubber specimen to a standardized size and mounting it in an abrasion testing machine. The test machine uses a rotating rough-surface roller. As the rubber specimen moves across the roller, material is abraded away. After testing, the specimen is measured again. The volume of rubber removed represents the abrasion value (lower is better). For grade M (DIN-X), the abrasion value must be less than 120 mm³. If a belt sold as grade M is tested and exceeds 120 mm³, it may indicate unethical substitution by the supplier.
When conveyor belts are delivered, we encourage customers to cut a sample approximately the size of A4 paper and submit it for independent testing. The sample should not pass through the seller or any third party to prevent possible sample substitution. If test results fall below the specified grade standard, we will accept the claim immediately.
Currently, the company submits belt samples for testing at the Thailand Rubber Research and Development Center (Mahidol University, Salaya Campus). If customers submit our belt samples for testing, we are pleased to cover the testing costs, provided that we receive one copy of the test results.
Example test results of conveyor belt rubber tested at the Mahidol University Rubber Center (Salaya) click to open
Below is the price list for conveyor belts grade P (DIN-Z) and grade M (DIN-X). We offer an additional 5–15% discount depending on order quantity. For inquiries or quotations, please contact us at mobile +66 86-363-8560, email sales@zealroller.com, or Line ID: zealroller. We look forward to serving you. Thank you.