Cartridge Seal

Since being established in 1986, ZERO-LEAK has been known for an unparalleled commitment to delivery mechanical seals that are beyond customer expectations. It's this standard of excellence that has provided the impetus for us to grow into the business we are today.

We believe that the customer always comes first - and that means exceptional products and exceptional services. Get in touch today to learn more about what we have to offer.

Ningbo Rock Metal Product Co., Ltd was established in 2007 and has been successfully mechanical seal and sintering structural components in Ningbo, China. We specialize in developing and manufacturing various products, such as mechanical seal, cartridge seal, O.E.M. pump seal, compressor seal, bushing, nozzle complete, carbon graphite, silicon carbide, tungsten carbide, ceramics etc.

Rock Metal has undertaken its production of advanced powder products and in-house R&D with continuous efforts in quality and production program improvement. We now have a highly qualified team consisting of professional and technical personnel trained in sintering, casting, sealing, bearing, and mechanics. We are equipped with advanced testing and productive instruments making us one of the most advanced industrial technology companies with a wide array of products.

The Mechanical Seal Division oversees the development and production of various products able to withstand the demands of high temperature, high pressure, and strongly corrosive environments in fields such as petrochemical equipment, paper and printing machines, textile and dyeing production line, and food processing and sanitary machinery.

We take pride in our products and ensure the highest standard of inspection. Our sales team is ready to work with you to provide you with the information and products you to best suit your needs.