https://www.shhuhangvalve.com/Rising-stem-ball-valve.html Design standard ：ASME B16.34 Rising stem ball valve product range ： 1.Pressure range ：CLASS 150Lb~1500Lb 2.Nominal diameter ： NPS 2~24″ 3.Body material：Carbon steel, Stainless steel, duplex stainless steel, Alloy steel, Nickel alloy 4.End connection ： RF RTJ BW 5.Mode of operation： Lever, Gear box, Electric, Pneumatic, hydraulic device, Pneumatic-hydraulic device; Rising stem ball valve product features： 1.Flow resistance is small 2.Mechanical cam forced seal with reliable sealing performance ; 3.Tope entry design ,easy for online maintenance; 4.When opening or closing ,there is no friction between seat and ball, operating torque is small and longer life; 5.Double guide tracks design; 6.Multi seals on stem with good sealing performance;