... .Chengdu Yitong Sealing Co., Ltd. manufactures high quality dry gas seal and mechanical seals for pumps, mixers, agitators and ... services:- Standard mechanical seals (John Crane, Burgmann, ROTEN)- OEM dry gas seal mechanical seals (Gundfos, APV, FRISTAM, Alfa-Laval, SIHI, ... etc.)- Customized dry gas seal and mechanical seals based on drawings or samples provided by ...