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Pneumatic ventilation butterfly valve

Pneumatic ventilation flanged butterfly valve

D641W type pneumatic ventilation butterfly valve is made of steel plate welding, which has the characteristics of short structure, light weight and convenient installation. The valve has small driving torque, flexible opening and closing, and convenient operation. The valve body is provided with an oil seal retaining ring, there is no visible gap between the sealing pairs, and the leakage rate is small. The expansion gap between the butterfly plate and the valve body is large, which can effectively prevent the stuck phenomenon caused by thermal expansion and cold contraction .

The valve can be equipped with various driving devices, such as manual device, worm gear transmission, pneumatic device, electric device. Ventilation butterfly valves are widely used in metallurgical , petrochemical, electric power, building materials, mining and other industrial pipelines to control or regulate the medium gas.

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【 Main technical parameters of D641W pneumatic ventilation butterfly valve 】

Nominal pressure (MPa) 0.05MPa leak rate 3%
Medium flow rate 25m/s Applicable media Hot and cold air, smoke
Strength test 0.1MPa medium temperature -30℃～-350℃

【D641W Pneumatic Ventilation Butterfly Valve Main Parts Material】

Part Name valve shaft valve plate valve body
Material carbon steel, stainless steel carbon steel carbon steel

【D641W Pneumatic Ventilation Butterfly Valve Main Dimensions and Connections】　　　　　　Unit: mm

DN D D1 L L1 L2 n- Фd b
300 405 370 120 716 220 8-12 10
350 455 420 140 786 240 8-14 10
400 505 470 140 924 270 12-18 10
450 570 530 160 999 295 12-18 10
500 620 580 160 1079 325 12-18 10
600 720 680 180 1140 380 16-18 12
700 820 780 180 1240 430 16-18 12
800 920 880 200 1350 490 16-18 12
900 1040 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 240 1900 690 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 16
1700 1840 1790 280 2590 1030 28-22 16
1800 1940 1890 300 2709 1096 28-22 16
1900 2040 1990 300 2826 1146 32-22 16
2000 2150 2090 320 2926 1196 32-26 16
2200 2360 2300 340 3126 1296 36-26 16
2400 2560 2500 360 3326 1396 36-26 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 440 4578 1898 48-30 20
3600 3790 3710 480 4780 1998 48-30 20
3800 4000 3910 480 5000 2098 52-30 22
4000 4210 4120 520 5200 2210 52-30 22

 

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