Face to Face dimensions Single-Plate Wafer Check Valves API Std. 594 Class 125-2500 Type A
- Dimensions are in millimeters unless otherwise indicated.
- The face-to-face tolerance shall be as specified in ASME B16.10 for sizes
through NPS 24 and shall be 3 mm for sizes larger than NPS 24.
- Flange faces with ring-joint grooves shall conform to the dimensions
shown in either ASME B16.5 or ASME B16.47, as applicable.