1.casting valve parts, valve components 2.mirror polishing 3.stainless steel ball valve body 1) Process : investment casting , sand casting , mirror polishing , water glass casting , etc .2) Material : casting steel , stainless steel , alloy steel , grey iron , etc .3) Standard : GB / ASTM / AISI / BS / DIN / JIS4) Trademark : JGQ5) Business scope : In North America, Europe and Asia6) Packing : ...