Burner valve housing material selection

According to the use of pressure gas pipeline, a reasonable selection of the burner valve housing material, both to meet the safe operation of the pipeline but also to reduce the cost and make the best use of the purpose. 1) Pressure Class B (12MPa) following transmission and distribution lines, gray cast iron burner valves are recommended, its biggest advantage is good corrosion resistance, and cheap, very suitable for underground pipelines. 2) Class B high pressure (18MPa) or less, and even medium voltage class A (014MPa) below, suggested the use of ductile iron or cast steel stove valves, focusing on recommended use ductile iron. For example: ductile cast steel grades QT400218 grades compared with WCB, the mechanical properties of the former than the latter is not, and corrosion resistance and are superior to steel casting process, the price is lower than steel (usually cast of 70 % or so). So ductile iron burner valves are superior overall performance and price cast steel burner valves, the pressure within the range of choice as ductile iron Propane Control Valve, but with particular attention to monitoring the quality of ductile material. 3) A high pressure level (116MPa) or higher pressure level, suggested the use of cast steel burner valves, burner valve manufacturing 4MPa pressure below the level, generally used WCB grades. 4) In recent years, the country began using PE gas pipes, PE pipes currently used in 014MPa pressure level below. PE ball has come out, the series gas Burner Valve can be buried, better sealing performance. But the current high price of PE ball, especially larger than 100mm diameter ball over.