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 Fig. No: CD1W01A CD1W05D CD1W01B CD1F01A CD1F05D CD1F01B CD3W01A CD3W05D CD3W01B CD3F01A CD3F05D CD3F01B