... , stainless steel valves, sanitary wares, water meters and various pipe fittings etc., the company is devoted provide high-quality professional ... ball(7).Sealing: EPDM, PTFE or Teflon. (8)Parallel Pipe Thread to ISO228/1,BSP,NPT etc.2.Brief Introduction ... 2) Machining Quality Control 3) In-coming Material Inspection 4) Assembly line Quality Control 5) 100% leakage testing 6) Final Inspection before ...