In aggressive pumping applications involving boiling OAT coolants, alkaline descalers, or synthetic lubricants, standard Nitrile (NBR) rubber rapidly suffers from thermal hardening, swelling, and hydrolysis. Our sealing rings utilize a premium Fluoroelastomer (FKM/Viton) matrix, renowned for its near-universal chemical resistance and high-temperature resilience. The integration of a tightly woven synthetic fabric mesh directly into the heel drastically increases the compressive modulus and tear strength of the seal. This prevents “cold flow” and localized cavitation damage, allowing the seal to far outlast standard rubber components in harsh industrial environments.

From a plant maintenance perspective, the structural rigidity of the fabric-reinforced 20x30x6mm seal allows for precise, straightforward installation without the absolute need for chemical retaining compounds. To guarantee a low-friction service life, technicians must verify that the pump shaft is completely free of micro-scoring and polished to a surface finish of 0.2 to 0.4 μm Ra. Crucially, the FKM dynamic lip must be pre-lubricated with a compatible high-temperature assembly grease before startup. This critical step eliminates the destructive “dry-rub” galling that causes immediate thermal degradation during the pump’s initial dry-suction priming phase.