NingBo HuaQing 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 Bur ...more>>