Pneumatic ventilation butterfly valve D641W belongs to the non-closed butterfly valve configuration valve pneumatic device (AT, GT, AW, G series). The valve body is made of structural steel plate welding, the valve is compact, light weight, easy to install, suitable for ventilation pipelines, ventilation and dust removal systems, hot and cold air, flue gas, dusty gases and other media. For dusty gas, gas pipeline, ventilation purification device, flue gas pipeline, etc. as a flow regulation and interception role.

Actuator selection: AT, TAW  series 

Gas source pressure: double action : 4-7bar/single action : 4~7bar 

Working temperature: room temperature type : -20°C~80 °C ( nitrile rubber O ring ) 

High temperature typ : -20°C~160°C ( fluorine rubber O ring ) 

Action range:  0~90° ± 5° 

Valve position signal: positioner : 4~20mA/return signal : full on and full off signal 

Valve body form: steel plate welding valve body 

Nominal diameter: DN50~2000mm 

Nominal pressure: PN6, 10, 16bar ( please specify if higher pressure needed when ordering ) 

Connection form: flange type, clamp type 

Valve cover form: one-piece 

Cover type: Cover pressing type 

Sealing filler: V-type polytetrafluoroethylene filler, flexible graphite filler