Pneumatic flange type hard seal butterfly valve

Body  

Nominal diameter: DN40-DN1000  

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

Connection: clamp, flange and lug  

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

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)