On August 12, 1965, Tianjin Mechanical Seal Factory was registered and established with the Tianjin Administration for Industry and Commerce.
Established in 1982, Wang Yuming (academician of CAE Member, expert in fluid seal engineering) was a senior engineer of Tianjin Mechanical Seal Factory from April 1982 to September 1988
1988 John Crane Co., Ltd. and Tianjin Mechanical Seal Factory jointly established John Crane (Tianjin) Co., Ltd
In 2001, Tianjin Kehao Electromechanical Equipment Co., Ltd. and Tianjin Mechanical Seal Factory jointly established Tianjin Lianqiang Mechanical Seal Technology Co., Ltd., with Lianqiang legal person holding 80% of the shares and Tianjin Mechanical Seal Factory holding 20% of the shares
In June 2007, John Crane (Tianjin) Co., Ltd. became a wholly-owned enterprise
In 2012, Tianjin Lianqiang Mechanical Sealing Technology Co., Ltd. successfully acquired the factory of John Crane (Tianjin) Co., Ltd
In 2016, Tianjin Lianqiang Mechanical Sealing Technology Co., Ltd. successfully acquired Tianjin Mechanical Sealing Factory and acquired all property rights of Tianjin Sealing Factory to become a wholly-owned company
