API 609 Natural Gas Worm Gear Forged Steel Lug Butterfly Valve
API 609 Natural Gas Worm Gear Forged Steel Lug Butterfly Valve, Applicable Standards:Butterfly valve design according to API609, ASME B16.34, Face to face ASME B16.10/API609, End Flanges ASME B16.5/ASME B16.47