Applicable standards: Steel check valves, API 594/API 6D Steel check valves, ISO 14313 Steel valves, ASME B 16.34 Face to face, ASME B 16.10 End flanges, ASME B16.5 Inspection and test, API 598/API 6D Applicable standards: Steel check valves, API 594/API 6D Steel check valves, ISO 14313 Steel valves, ASME B 16.34 Face to face, ASME B 16.10 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 Wafer ends Available with flanged ends Design description: One piece body Butterfly swing type Dual-plate disc, long-pattern Renewable split disc hlorizontal or vertical service Wafer ends Available with flanged ends