Valve One-stop independent production throughout the course,which makes the valve quality more guaranteed.Cast steel area follow the idea of one-stop independent manufacture,including the Yuanda cast steel research institute,CNC model workshop,sand test model,model casting,casting tempering,machining,testing,assembling,painting and storage.Every procedure of the valves have their standard and monitor to ensure the valve quality,so that achieve our final objective,zero defect,more security assurance.We first achieved processing specialization,numerical control,mechanical and electrical integration.Moreover,we insist innovative management and business philosophy.One-stop independent production significantly increase the valve production efficiency.