D341W ventilation valve ventilation valve using the same material as the processing and body seals, their body temperature with suitable selection may be, nominal ≤0.6MPa, this ventilation valve design is reasonable, small torque, easy operation, open and close rapidly, lightweight cheaper prices. Generally applicable to the industry, metallurgy, environmental protection, ventilation pipes for adjusting the flow of the medium. Ventilation valve main features are: 1, novel design, reasonable, unique structure, light weight, open and close quickly. 2, the operating torque is small, easy to operate, saving and flexible. 3, the use of a material adapted to meet the low, medium, medium temperature and high temperature in different corrosive media. Performance specifications nominal diameter DN200-3000 nominal 1.0 Applicable Applicable medium temperature at room temperature gas, air, flue gas main parts material Part Name Material Name body of the valve plate Q235 (A3) of the valve shaft 45 major asbestos rope packing shape and structure size mm DN LD D1 z * ￠ d H H1 Weight kg 200 140 320 280 8 * ￠ 17.5 715 531 66 250 140 375 335 12 * ￠ 17.5 822 593 78 300 170 440 395 12 * ￠ 22 910 652 - 350 170 490 445 12 * ￠ 22 - - - 400 190 540 495 16 * ￠ 22 990 682 128 450 190 595 550 16 * ￠ 22 1037 710 130 500 190 645 600 20 * ￠ 22 1258 906 183 600 210 755 705 20 * ￠ 26 1490 1026 211 700 210 860 810 24 * ￠ 26 1480 1010 327 800 210 975 920 24 * ￠ 30 1633 1108 378 900 250 1075 1020 24 * ￠ 30 - - - 1000 250 1075 1120 28 * ￠ 30 - - - 1200 250 1375 1320 32 * ￠ 30 2345 1585 763 1400 300 1575 1520 36 * ￠ 30 - - - 1600 300 1790 1730 40 * ￠ 30 - - - 1800 300 1990 1930 44 * ￠ 30 - - - 2000 300 2190 2130 48 * ￠ 30 3205 1180 1502 2200 350 2405 2340 52 * ￠ 33 - - - 2400 350 2605 2540 56 * ￠ 33 - - - 2600 350 2805 2740 60 * ￠ 33 - - - 2800 400 3030 2960 64 * ￠ 36 - - - 3000 400 3230 3160 68 * ￠ 36 - - - valve size and weight to the actual subject