ISO 5752 butterfly valve
Standard: 
1) Design and manufacture: API609, ANSI B16.1
2) Face to face dimensions: BS EN 558-1
3) Test and inspection: API 598
4) Install between flanges: ANSI 16.10(CLASS 125), DIN2501( PN10/16), BS4504(PN10/16)
Optional Materials:
Body: Cast Iron GG25, Ductile Iron GGG40, GGG50
Disc: Ductile Iron+Nickel painted,SS304/316,AL-BRONZE C954
Seat: NBR ( Buan-N), EPDM, VITON, PTFE
Shaft & Pin: SS410, SS416, SS304, SS316
Actuator: Lever,Worm Gear, Pneumatic and Electric Actuator