The D971X-16C electrical wafer butterfly valve is a reliable mechanical solution, considering its compliance to GB, ISO, ANSI, and DIN standards. It approximates 40 to 600 nominal diameter, and obtains optimal pressure range of 1 MPa. This assembly works under -20 to 120 degrees Celsius. Its base structure is dominated with gray cast iron, ductile cast iron, cast steel,and stainless steel materials.