Founded in 1987, Tefulong Group Co., Ltd is one of the largest intelligent electric valve actuator manufacturer in China with the brand name of Greatork, it has 40,000 square meters's modern factory, more than 300 employees and provides 20,000 pcs top quality electric actuators per year. Tefulong Group has got certificates like ISO9001,ISO14001:2004, 18001 OHSAS,IP68,ATEX,CE certificate, the actuators has been supplied into more than 20 countries.Our main categories as following: For standard part-turn actuator, the output torque range from 50~200,000 Nm For standard multi-turn actuator, the output torque range from 35~16000 Nm For Linear actuator, the thrust range from 8.1KN ~ 45.5KN These actuator are available to work under IP68(15 meters under water operate for 90 hours) and Exd*T4(-30**70*? or other extreme environment when specified.Besides, we have various part-turn and multi-turn gearbox for your choice too.