Design features The ball valve are designed in accordance with iso14313?api 6d?bs 5351?gb/t 19672; Simple structure with good sealing performance and small torque; Full bore and reduced bore design with the minimum flow resistance (zero actually); Emergency sealant injection; Cavity pressure self relief; Independent ball and stem; Low emission packing; Fire safe, anti-static and anti-blowout stem design; Valve seat function dbb, dib-1, dib-2; Optional extended bonnet. Product range Body material: carbon steel, stainless steel, alloy steel Nominal diameter:2"~60"(dn50~dn1500) End connection: rf, rtj, bw Pressure range: class150~2500(pn16~pn420) Working temperature:-46?~+200?