SD341X Worm Gear Expansion Butterfly Valve, [Air Conditioning Home] HVAC Heating Engineering Central Air Conditioning Ventilation Dust Removal, Electric Control Valve SD431X Worm Gear Expansion Butterfly Valve Purpose and Features Expansion butterfly valve is suitable for food, pharmaceuticals, chemical, petroleum, power, light textile, papermaking with temperature 180℃ and nominal pressure 1.6MPa, used for regulating flow and cutting off medium in water supply and drainage, gas pipelines, with the function of compensating for pipe thermal expansion and cold contraction. The main features are as follows: 1. Novel design, reasonable structure, unique structure, light weight, easy operation, quick opening and closing; 2. In addition to the functions of regulation, cut-off, and compensation for thermal expansion and cold contraction caused by temperature difference in the pipeline, Shenzhen Hongling Private VIP Confidential Internal Reference 0205 also provides convenience for installation, replacement, and maintenance of valves; 3. Sealing parts can be adjusted and replaced, with reliable sealing performance characteristics. Design and Manufacturing Standards Design Standard: GB/T 12238-1989 Flange Connection Size: GB/T 9113.1-2000; GB/T 9113.2-2000; GB/T 9115.1-2000; GB/T 9115.2-2000 Pressure Test: GB/T 13927-1992; JB/T 9092-1999 Main Technical Parameters Nominal Diameter DN (mm) 50~2000 Nominal Pressure PN (MPa) 0.6 1.0 1.6 Test Pressure Ps (MPa) Strength Test 0.9 1.5 2.4 Sealing Test 0.66 1.1 1.76 Gas Sealing Test 0.6 0.6 0.6 Applicable Temperature l80℃ Applicable Medium Air, water, steam, gas, oil, etc. Drive Form Manual, worm gear transmission, pneumatic transmission, electric transmission. Material of Major Parts Part Name Material Valve Body Cast iron, cast steel, stainless steel, chromium-molybdenum steel, alloy steel Butterfly Plate Cast steel, alloy steel, stainless steel, chromium-molybdenum steel Sealing Ring Rubber, PTFE, polyurethane, stainless steel Valve Stem 2Cr13, stainless steel, chromium-molybdenum steel Expansion Pipe Cast iron, cast steel, stainless steel, chromium-molybdenum steel Packing Flexible graphite http://www.fengleigroup.com/Html/qf/230403260.html