Flange ventilation butterfly valve research and development of a strong Germany processed into the ring with the body the same material, its application temperature of the body selection, nominal pressure ≤ 1.0MPa generally applicable to the industry, metallurgy, environmental protection, pipeline ventilation regulating media flow. [1] 
 Standards: 
 Design and manufacture standard: GB / T 12238-1989; the JB/T8692-1998 structure length standard: GB / T 12221-2005 connection flange standard: GB / T 9115.1 pressure and temperature rating: GB / T 12224-2005 test inspection standard: GB / T-13927-2008 
 Flange ventilation butterfly structural features: 
 The strong German novel ventilation butterfly valve R & D and production design, reasonable, unique structure, light weight, open and close quickly. Butterfly valve operating torque is small, easy to operate, effort and dexterity. Used to adapt materials to meet the low, middle, high media temperature and corrosive media. Connecting rod, bolts, reliable, long life, without the influence of the medium flow 
 Valve R & D and production of a strong Germany the flange ventilation Butterfly range of applications: 
 Ventilation butterfly valve R & D and production of a strong Germany for the temperature of the body selection, nominal pressure ≤ 1.0MPa, are generally applicable to the ventilation in the industry, metallurgy, environmental protection, chemicals, building materials, power plants, glass and other industries, environmental engineering dust, cold or hot air in the gas pipeline, as a regulated flow of gaseous media or cut off the pipeline control device. Ventilation butterfly valve in the pipeline should generally be installed horizontally. 
 Flange ventilation butterfly valve sealing material selection and application of temperature: 

 Variety of materials of carbon steel, low temperature carbon steel alloy steel austenitic stainless steel, chrome molybdenum steel 
 Code WCB the LCB WC6 WC9 C5, or C12 chromium Cr-18 type, 304,31 6 12CrMoV 
 Resistance to the maximum temperature of 425 ℃ 345 ℃ 595 ℃ 650 ℃ 600 ℃ 560 ℃ 
 Resistance to the lowest temperature -29 ℃ -46 ℃ -29 ℃ -29 ℃ -196 ℃ -40 ℃ 
 Applicable to operating temperature ≤ 25 ° C ≤ 345 ° C ≤ 595 ° C ≤ 650 ° C ≤ 600 ℃ ≤ 560 ° C 
 Flange ventilation butterfly valve research and development of a strong Germany Main technical parameters: 

 Nominal diameter DN (mm) 50 ~ 2000 
 Nominal pressure PN (MPa) 0.05 0.25 0.6 
 Strength test of the test pressure Ps (MPa) 0.075 0.375 0.9 
 Seal test leakage ≤ 1.5% 
 Application of medium gas, dust gas, flue gas 
 Drive the form of manual, worm worm gear, gas transmission, electric transmission 
 Flange ventilation butterfly parts and materials and conditions: 

 Part Name Material 
 Cast steel body, stainless steel, chromium, nickel, molybdenum and titanium steel, chromium, molybdenum and titanium, steel and other special materials 
 Butterfly, cast steel, stainless steel, chrome-nickel, molybdenum and titanium steel, chromium, molybdenum and titanium steel and other special materials 
 Ring with the same body 
 Stem carbon steel, 2Crl3, stainless steel, chromium, nickel, molybdenum and titanium steel 
 Packing of flexible graphite