applicable standards:
●steel butterfly valves, api 594/api6d
●steel valves, asme b16. 34
●face to face, asme b16. 10
●end flanges, asme b16. 5
●inspection and test, api 598/api 6d

design description
●one piece body
●butterfly swing type
●dual-plate disc, long-pattern
●renewable split disc
●horizontal or vertical service
● lug/wafer ends
●available with flanged ends