Electro pneumatic butterfly valves 
End flange: ANSI B16.1/ASME B16.45 B16.5/BS 4504/AS 2129/BS 4504/DIN 2501/ISO 7005/JIS 5K 10K 16K 
Face to face: API 609/ISO 5752/BS 5155/EN 558/DIN 3202 1K 
Top flange: ISO 5211 
Normal pressure: DN40-DN600 PN1.0/1.6MPa(150/200psi) DN700-DN1200(28"-48")PN1.0MPa(150psi) 
Body: CI/DI/WCB/AL-Bronze/CF8/CF8M(cast iron/ductile iron/carbon steel/Aluminum bronze) 
Disc: CI/DI/WCB/AL-Bronze/CF8/CF8M/1.4529/1.4462(cast iron/ductile iron/carbon steel/Aluminum bronze/duplex stainless stell) 
Stem: WCB/SS304/SS316/SS410/SS431/MONEL K500/17-4pH 
Seat: NBR(Buna-N)/Hypalon/EPDM/Viton/Nature rubber/PTFE/Abrasion resistant rubber/Heat resistant EPDM 
"Suitable 

Temperature": -20~200(depending on pressure, medium and material) 
Suitable medium  Fresh water, sewage, sea water, air, vapor, food, medicine, oils, alkais, salt etc. 
Nominal diameter: DN40-DN1200