Okval (www.okval.com), ductile iron pipe fittings and valves producer Valve and Fittings Manufacturers in North China. Our main line as the following: Fittings:Universal CouplingUniversal Flange AdaptorQuick Flange Adaptor for PVC/PE PipesTensile Restrained Flange Adaptor for PVC/PE PipesTapping saddles clampDismantling jointsRubber Expansion JointBS EN545 Ductile Iron FittingsISO2531 Ductile Iron Fittings with standard ISO2531 EN545BS EN12842 Ductile Iron Fittings for PVC pipeGibault jiontsRepair clampValves: Resilient soft seated Gate Valves Metal seated Gate Valves Ball check valves wafer butterfly check valves Silent Check Valves Swing check Valves Knife Gate ValvesThread ends of gate valvesY StrainerAir release ValvesDiaphragm ValvesOEM Machining parts,Casting parts,Forging parts, Stamping parts