Product Explain � 1)Production Enforce Standard Flanged Dimension: PN1.0-PN1.6Mpa to GB4216, PN2.5Mpa to GB9113 Inspect and Test: JB/T9092, GB/T13927 Diaphragm Type: DN20~450mm Piston Type: DN500~900mm Pressure rating:PN1.0MPa PN1.6MPa PN2.5MPa Suitable Temperature: �80 C 2)Materials: Body/ Bonnet:Cast iron, Ductile Iron, Carbon Steel, Stainless Steel, Bronze Compression Spring:Silicon Manganese Stee Cylinder liner:Stainless Steel Diaphragm clamping:Ductile Iron Piston:Ductile Iron, Bronze Diaphragm:NBR Rubber O-ring:NBR Rubber Stem:Stainless Steel Disc:Ductile Iron, Bronze Gasket :NBR Rubber Gasket Clamping:Ductile Iron,Bronze 3)Purpose: For the automatic water supply applications of water box, pool and water tower in the mining industry, enterprises and high buildings. 4)Advantages: Be equipped with a three way valve controlled by two float balls. Exactly control the water line by the way of full-open and full-close in order to prevent the overfall. Main External and Connection Dimension Unit:mm