... 1. Italian type thin Ball valve stainless steel OEM China casting manufacturer Main material: 304 and 316 stainless steel,WCB.2.Connect form: flange.3 ... 6.Thread standard: PT, NPT, BSP,BSPT.7.Suitable medium: water, oil, steam, nitric acid, acetate acid and so on. ... which is specified by autocar department of ASQC(American Society for Quality Control),AIAG,Kreisler motors company and Ford general motors ...