NingBo HuaQiang Mechanical Seal Factory,located in NingBo suburb, was established in 1995.We are a professional manufacturer of mechinal seals,some cartridge seals, and sealing materials.such as CARBON,SILICON CARBIDE, TUNGSTEN CARBIDE,CERAMIC,STAINLESS,RUBBER and so on.which can replace the similar products of John Crane and Burgmann.The eighty percent of our products are exported.Now we can make OEM for some professional pump manufacturers in the world......