Ningbo HuaQiu Mechanical seal Co.,Ltd. has owned most advanced equipments and complete check tools to ensure the quality of mechanical seals, seal faces/rings in pressureless sintered silicon carbide/ssic, reaction bonded silicon carbide/sic, Aluminium Oxide 99.5% ceramic, Aluminium Oxide 99% ceramic, Aluminium oxide 95% ceramic, tungsten carbide with 6% nickel and 6% cobalt, resin carbon and molded carbon.