Pneumatic flange type hard seal butterfly valve

Body  

Nominal diameter: DN40-DN1600  

Body material: nodular cast iron, WCB, 304, 316  

Connection: clamp, flange and lug  

Pressure rating: PN1.0, 1.6, 2.5, 4.0MPa 

Structure: eccentric structure 

In the valve components  

Seat tightness: EPDM: -30℃~120℃  

NBR: -30℃~80℃ 

PTFE: -30℃~140℃ 

VITON: -30℃~150℃ 

Plate material: nodular cast iron nickel plating, nylon coating, aluminum bronze, 304, 316, 316L, 1.4529, 2507 

Stem material: stainless steel 410, 304  

Applicable media: water, liquid, gas, oil, powder, steam, acid and alkali corrosive medium. 

Design manufacturing standard  

Design and manufacture: GB/T12238-2008  

Connection standard: JB/T 79.1-1994  

Face to face: GB/T12221-2005  

Stress test: GB/T13927-2008 

Pneumatic actuator  

Double role: a three-stage pneumatic actuators are: 0°, 45°and 90° please determine the median (order)  

Single action: when the gas source fails, the gas source fails; 0°to 45°to 90° please determine the median (order)