D971X / D971F Wafer Type Electric Butterfly by body, disc, stem, electric actuator main parts, driven by rotational movement of the spindle motor, the drive to do 90-degree rotation of the disc reaches the opening and closing effects. Wafer connection, simple structure, easy to install, especially for the installation of a short distance, large diameter pipeline. By matching the different types of electric actuators, may be suitable for different process control requirements, widely used in a variety of controlled pipeline and devices. [Features] 1, can realize remote control and centralized control of two large-scale, completely sealed, gas seal test, zero leakage 3, the installation of different electric actuators can be realized: signal feedback, regulation, and different proof 4 control effect, choose different materials, applicable to a variety of media design specifications】 【Standard: GB / T 12238 length of the structure: GB / T 12221 flange connection: GB / T 9113 Test and Inspection: GB / T 13927 The main parts and materials] Part Name Material Body Ductile cast iron ductile cast iron disc nylon coated plates rubber lined plate CF8 CF8M 2507 1.4529 NBR seals (NBR) EPDM (EPDM) PTFE ethylene (PTFE) 45 # 1Cr13 stem O-ring flexible graphite packing