Pneumatic flange butterfly valve with manual override introduction:
Pneumatic flange butterfly valve with manual override consists of pneumatic actuator  with side handwheel and stainless steel triple eccentric butterfly valve, according to different generally can be divided into flange or wafer connection, Pneumatic flange butterfly valve with manual override material: ductile iron,cast steel,stainless steel and so on, the body part adopts three eccentric structure, butterfly valve disc and seal mechanism design is unique, Pneumatic flange butterfly valve with manual override has excellent cutting performance and durability, has cut off, adjust the dual function at the same time, long life, energy-efficient and butterfly valve.Because the Pneumatic flange butterfly valve with manual override closing is completed by torque, that is, the greater the valve closing torque, the better the sealing of the seat.
 
Pneumatic flange butterfly valve with manual override application range:
Pneumatic flange butterfly valve with manual override is suitable for water, sewage, sea water, air, steam, gas, combustible gas, corrosive medium, oil and food and other media, the highest working temperature can reach 550℃.Pneumatic flange butterfly valve with manual override widely used in petroleum, chemical, metallurgy, electricity, food, medicine, water supply and drainage, gas transport and other different media pipeline, do switch off or adjust the medium flow parameters.
 
Pneumatic flange butterfly valve with manual override performance advantages:
1. The use of three-dimensional eccentric sealing structure, seat and butterfly plate between the wear is small, and the sealing surface wear resistance, prolong the service life;
2. According to the connection method, it can be divided into flange,wafer,lug connection, which can be used in different process pipelines;
3. Large diameter butterfly valve butterfly plate can be used quilted structure, with high strength, large flow area, small flow resistance;
4,The use of bidirectional pressure three eccentric multi-level hard sealing structure, with bidirectional sealing function, installation is not limited by the flow of media, also not affected by the space position, can be installed in any direction;
5. With metal hard seal and elastic seal double advantages, no matter in the case of low and high temperature, have excellent sealing performance, corrosion resistance, long service life and other characteristics.
  
Pneumatic flange butterfly valve with manual override Technical parameters:
Nominal diameter: DN50 ~ DN2000(MM)
Nominal pressure:PN1.0, 1.6, 2.5, 4.0MPa
Connection form :wafer type, lug type,flange type
Seal form: three eccentric metal hard seal
Air supply pressure: 0.4~ 0.7mpa
Action range 0 ~ 90°
The leakage amount is 10-4 of Kv value according to GB/ t4213-92
Body material: carbon steel, 304, 316 stainless steel
Disc material: carbon steel, 304, 316 stainless steel
Basic error band locator: less than ±2% of the total stroke
Applicable temperature: carbon steel: -29℃ ~ 400℃ stainless steel: -40℃ ~ 450℃
Actuators: GT, AT, AW series single action, double action pneumatic actuators
Control mode switch two mode (gas on and gas off), adjustable (4-20ma analog control)

Pneumatic flange butterfly valve with manual override accessories:
1 Electric-Pneumatic (Pneumatic-pneumatic) positioner for regulating ball valve
2 Valve position transmitter
3 solenoid valve
4 limited switch
5 Air filter reducer