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API 594 Face to Face Dimensions Dual-Plate Wafer Check Valves

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Face to Face Dimensions Dual-Plate Wafer Check Valves API Std. 594 Class 150-2500 Type A

Dual-Plate Wafer Check Valves

NPS CLASS
150 300 600 900 1500 2500
2 60 60 60 70 70 70
2½ 67 67 67 83 83 83
3 73 73 73 83 83 86
4 73 73 79 102 102 105
6 98 98 136 159 159 159
8 127 127 165 206 206 206
10 146 146 213 241 248 254
12 181 181 229 292 305 305
14 184 222 273 356 356
16 191 232 305 384 384
18 203 264 362 451 468
20 219 292 368 451 533
24 222 318 438 495 559
30 305 368 505
36 368 483 635
42 432 568 701
48 524 629
NPS 150 300 600 900 1500 2500
CLASS

Notes:

  • 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.
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