For all valve balls, the two most important points of the valve balls are the roundness and the surface finish. We are able to manufacture valve balls with extremely high roundness and high surface finish tolerances. Short Description: Size: From 1/4”to 40” ( DN8mm~1000mm) Pressure Rating: Class 150~2500 Materials: ASTM A105, A350 LF2, A182 F304, A182 F316, A182 F6A, A182 F51, A182 F53, A182 F55, Monel, Inconel, etc. Surface Treatment: Polishing, electroless nickel plating (ENP), hard chromium, tungsten carbide, chromium carbide, stellite(STL), inconel, etc. Roundness: 0.01-0.02 Roughness: Ra 0.2-Ra 0.4 Concentricity: 0.05 Processing Steps: Ball Blanks - PMI and NDT Test - Heat Treatment - NDT, Corrosion and - Material Properties Test - Rough Machining - Inspection - Finis- Machining - Inspection - Surface Treatment - Inspection - Grinding & Lapping - Final Inspection - Packing & Logistics Applications: various ball valves which are used in the fields of petroleum, natural gas, water treatment, medicine and chemical industry, heating, etc. Packaging : blister box / plastic paper / paper carton / plywood wooden box / bubble bag / paper carton / plywood wooden box. Our Advantages: - Advanced production and inspection facilities - Good production management system - Strong technical Team - Reasonable & cost-effective price prices - Prompt delivery time - Good after-sales service If you have any new inquiry, please feel free to email us. We will try our best to reply you within the soonest time.