Worm signal butterfly XD371X-16 [Product Name]: Signal butterfly, fire butterfly, XD371X-16 [Color]: Red Product Material: cast iron, ductile iron Product use: This valve is suitable in the petroleum, chemical, food, pharmaceutical, paper, water, electricity, drainage, metallurgy, energy and other pipeline systems. May be in a variety of corrosive, non-corrosive gases, liquids, semi-fluid and solid powder pipelines and containers and the closure devices used as an adjustment. Especially widely used in the high-rise building fire safety systems and other needs to display the status of the pipeline system valve switch. The main features of the product: 1, small, lightweight, easy disassembly machine maintenance, and can be mounted in any position. 2, the structure is simple, compact, 90 ° swing open and close quickly. 3, operating torque, energy saving. 4, the linear flow characteristics tend to adjust better performance. 5, the number of trials open and close as many as tens of thousands of times, and long life. 6, to be completely sealed, gas leak test is zero. 7, choose different materials, applicable for a variety of media. 8, where applicable, gate valves, globe valves, plug valves, diaphragm valves and hose lines, particularly in the high-rise building fire and need to show the status of the pipeline system valve switch, can be replaced with the valve. [] The main performance specifications: Nominal pressure PN (MPa) nominal diameter DN (mm) test pressure (MPa) Operating temperature (℃) Suitable medium sealed casing 50 to 250 1.5 1.1 1.0 -15 to 150 fresh water, sewage, water, air, steam, food, medicine, acids, oils and other major components 1.6 2.4 1.76 [material]: Name valve disc ring stem packing materials gray iron, ductile iron carbon steel, 304 stainless steel, carbon steel, poly tetrafluoroethylene, nitrile rubber, ethylene propylene rubber, carbon steel, stainless steel Teflon, nitrile rubber, ethylene propylene rubber [rubber seat operating temperature range]: natural rubber, rubber Code NR NBR nitrile rubber butyl rubber IIR CR chloroprene rubber silicone rubber EPDM EPT SI Viton FPM epichlorohydrin rubber C11R / CHC temperature 8010010080 125/160 200/250 250 100 low temperature -50 -40-200-40-70 / -100 -15-45