Cast Steel Gate Valve Structure: Full bore Flexible and rigid and soft seal structure Self-centering glad and plate renewable seat Bolted bonnet, spiral would eight-square gasket sealing bonnet and pressure Sealing bonnet Design & Manufacture Std: API6D, API 600, ASME B16.34 Face to Face: ASME B 16.10, API600, API 6D Flange End: ASME B 16.5; AMSE B16.47A, Butt-welding End: ASME B16.25 Testing & inspection: API 598 CL300, CL600: NPS 2"-36"Material: WCB, LCB, WC6, C5, CF8, CF8M, CF3, CF3M Operation: Manual, Electric, Pneumatic, Hydraulic, Gear