The worm wheel ventilated the butterfly valve TD341W a Product Overview ventilation butterfly manufacturing, steel plate welded with short structure size, light weight, easy installation. Torque is small, flexible and open and close the valve drive, easy to operate. Set oil seal retainer ring on the valve body, between the seal pair no visible gap, the leakage rate is small. Expansion gap between the disc and the valve body, can effectively prevent stuck phenomenon caused due to thermal expansion and contraction. The valve can be equipped with a variety of drives, such as manual device, worm gear, pneumatic devices, electric devices. Ventilation butterfly valves are widely used in metallurgy division, power, building materials, mining and other industrial piping, the medium gas gas control or regulation. Main parameters Nominal pressure (MPa) 0.05MPa medium temperature -30 ℃ ~ -350 ℃ strength test 0.1MPa Suitable medium hot and cold air, flue gas medium velocity 25m / s leak rate of 3%, the name of the main parts material parts Body valve plate valve shaft material carbon steel carbon steel, carbon steel, stainless steel, TD341W worm gear ventilation butterfly shape connection Dimensions unit: mm DN D D1 L L1 L2 n-Фd b 300 405 370 120 716 220 8-12 10 350 455 420 1407862408-14 10 400 505 470 140 924 27012-1810450 570 530 160 999 295 12-18 10500620580160 1079 325 12-18 10 600 720 680 180 1140 380 16-18 12 700 820 780 180 124043016-1812 800 920 880 200 1350 490 16-18 12 900 1040 2,990,200 1450 540 16-18 14 1000 1140 1090 220 1550 590 20-18 14 1100 1240 1190 220 1800 640 20-18 14 1200 1340 1290 2401900690 20-18 14 1300 1440 1390 240 2020 760 20-18 16 1400 1540 1490 260 2120 810 24-18 16 1500 1640 1590 260 2220 860 24-18 16 1600 1740 1690 280 2390 980 24-18 16170018401790 280 2590103028-22 16180019401890 300 the 2709109628-22 16190020401990 300 2826 1146 32-22 16 2000 2150 2090 320 2926 1196 32-26 16 2200 2360 2300 340 3126 1296 36-26162400 2560 2500 360 3326139636-26 18 2600 2760 2700 380 3526 1496 40-26 18 2800 2960 2900 400 3726 1596 40-26 18 3000 3190 3110 400 4098 1698 44-30 18 3200 3390 3310 440 4338 1798 44-30 20 3400 3590 3510 44045781898 48-30 20 3600 the 3,790,371,048,047,801,998 48-30 20 3800 4,000 3910 480 5000 2098 52-30 22 4000 4210 4120 520 5200 2210 52-30 22