QD341W manual light airy lightweight ventilation valve pneumatic valve QD641W QD941W electric light airy butterfly Description: Specification :100-5000 QD41W light ventilation is a non-sealed butterfly valve, used in medium temperature of ≤ 300 ℃ Nominal pressure on 0.1Mpa pipes, for connectivity, opening and closing or regulating media flow. The unique structure of the valve, made of high quality steel plate welded together, with small size, light weight, large flow area, opening and closing flexible, on-site and remote control, widely used in building materials, metallurgy, mining, electric power and other industries in the ventilation, environmental engineering cold or hot dust-containing gas conduit as the gas medium conduit to regulate the flow control means or off. QD41W light airy Butterfly Key Features: Diameter: DN100-4000 Nominal pressure: 0.1MPA Applicable temperature: ≤ 300 ℃ Applicable medium: air, dust flue gas supply (voltage): Three-phase 380V, AC, Air pressure: 0.4- 0.6MPA Leakage: <1.5% QD41W lightweight ventilation valve body material: Name body parts of the valve plate valve shaft material carbon steel, carbon steel, stainless steel QD41W light airy butterfly Usage: This series special light valve, used in metallurgy, mining, cement, chemical industry, environmental protection equipment for heating, ventilation and dust and other piping systems for two-way open and close and adjust the gas flow to use. QD41W lightweight ventilation valve features: 1, the structure of short, light weight, small flow resistance, abrasion resistance, less leakage, hoist flexible. 2, the electric device can be on-site operation and remote control.