1)we are mechanical seal manufacturer. 2)good price and high quality 3) application: Petroleum, Chemical fiber, Fertilizer Chengdu Yitong ... Co., Ltd. manufactures high quality dry gas seal and mechanical seals for pumps, mixers, agitators and compressors, covering applications ... mechanical seals (John Crane, Burgmann, ROTEN)- OEM dry gas seal mechanical seals (Gundfos, APV, FRISTAM, Alfa-Laval, SIHI, ...