... ) Machining Types: Machined by Round Bar and steel plate, Drilling, Milling, Turning, Boring, Slating, Grinding,, NC/CNC Machining etc.4) ... .5) OEM Service6) Special design is available.7) ISO9001:20008) Standard: ASTM, BF,BS, JIS, UNI, ANSI, ISO etc.valve stem ... of 303 stainless steel4"API Gate ValveMaterial: Alloy Steel, Stainless SteelMachined from round bar by ...