... Yitong Sealing Co., Ltd. manufactures high quality dry gas seal and mechanical seals for pumps, mixers, agitators and compressors, covering applications from ... services:- Standard mechanical seals (John Crane, Burgmann, ROTEN)- OEM dry gas seal mechanical seals (Gundfos, APV, FRISTAM, Alfa-Laval, SIHI, ... Bushings and shafts- Mechanical seal refurbishment and re-engineering dry gas seal for agitator