Custom Belleville stacks preload against pump endplay, preventing hang-up. Australian alumina refiners in Gladstone report 45% wear reduction vs. oiled types. CFD-optimized grooves trap micro-particles, extending backup life. No lubrication suits remote FIFO sites, with visual wear indicators for quick checks. Tailings pumps handle 70 bar cyclone feeds flawlessly. Local 3D printing ac... https://globalsealstech.com/product-category/oil-gas-seals/oil-free-lubricated-pump-seals/