... valves: Type: 1pcs ball valves, 2pc ball vales, 3pcs ball valves Connection End: threaded ball valves, flanged end ball valves, butt welded ball valves, socket welded ball valves ... , BSPT. BSP. DIN2999 Testing: API 598 Suitable medium: Water, oil, steam, nitric, acid, acetate acid and some corrosive liquids