Triple-offset butterfly valves offer advantages including compact size, rapid operation and low cost, with expanding applications across chemical processing, tank farms, terminals, utility systems, and municipal infrastructure. However, there're many problems of leakages, short service life, and high cost maintenance. Upon these problems ATW's triple-offset butterfly valve has below features: 1.Low torque means long service life, ATW challenges industry's lowest torque record! 2.Full pressure differential at bi-directional sealing, under any pressure and temperature; 3. Seat and disc rings are intermixable and interchangeable with high reliability.