Our NSF®-61-372 certified AWWA Class SD Stainless Steel Blind Flanges are manufactured to meet American Water Works Association (AWWA) C228 specifications. This blind flange matches the ANSI #150 drill pattern and offers pressure ratings of up to 175psi for 4- to 12-inch sizes, and up to 150psi for flanges 14 inches and larger at atmospheric temperature. We manufacture these flanges in domestic (AIS) options, and our machine shop can modify AWWA flanges to spec.
These products have been certified by NSF® against the requirements of NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372. See official listing.
Downloads:
| API Part Number | Size | O.D. | I.D. | Ø B.H.C. | Ø B.H. | # B.H. | THK | Weight Lbs |
| SPFBL0400-D-CLN | 4 | 9.00 | BLIND | 7.50 | 0.750 | 8 | 0.625 | 11.0 |
| SPFBL0500-D-CLN | 5 | 10.00 | BLIND | 8.50 | 0.875 | 8 | 0.650 | 13.1 |
| SPFBL0600-D-CLN | 6 | 11.00 | BLIND | 9.50 | 0.875 | 8 | 0.693 | 18.1 |
| SPFBL0800-D-CLN | 8 | 13.50 | BLIND | 11.75 | 0.875 | 8 | 0.813 | 31.0 |
| SPFBL1000-D-CLN | 10 | 16.00 | BLIND | 14.25 | 1.000 | 12 | 0.953 | 52.0 |
| SPFBL1200-D-CLN | 12 | 19.00 | BLIND | 17.00 | 1.000 | 12 | 1.117 | 87.0 |
| SPFBL1400-D-CLN | 14 | 21.00 | BLIND | 18.75 | 1.125 | 12 | 1.133 | 107.0 |
| SPFBL1600-D-CLN | 16 | 23.50 | BLIND | 21.25 | 1.125 | 16 | 1.265 | 150.0 |
| SPFBL1800-D-CLN | 18 | 25.00 | BLIND | 22.75 | 1.250 | 16 | 1.331 | 178.0 |
| SPFBL2000-D-CLN | 20 | 27.50 | BLIND | 25.00 | 1.250 | 20 | 1.448 | 234.0 |
| SPFBL2200-D-CLN | 22 | 29.50 | BLIND | 27.25 | 1.375 | 20 | 1.568 | 290.0 |
| SPFBL2400-D-CLN | 24 | 32.00 | BLIND | 29.50 | 1.375 | 20 | 1.661 | 365.0 |
| SPFBL2600-D-CLN | 26 | 34.25 | BLIND | 31.75 | 1.375 | 24 | 1.786 | 447.0 |
| SPFBL2800-D-CLN | 28 | 36.50 | BLIND | 34.00 | 1.375 | 28 | 1.906 | 542.0 |
| SPFBL3000-D-CLN | 30 | 38.75 | BLIND | 36.00 | 1.375 | 28 | 2.008 | 647.0 |
| SPFBL3200-D-CLN | 32 | 41.75 | BLIND | 38.50 | 1.625 | 28 | 2.150 | 798.0 |
| SPFBL3400-D-CLN | 34 | 43.75 | BLIND | 40.50 | 1.625 | 32 | 2.252 | 916.0 |
| SPFBL3600-D-CLN | 36 | 46.00 | BLIND | 42.75 | 1.625 | 32 | 2.370 | 1071.0 |
| SPFBL3800-D-CLN | 38 | 48.75 | BLIND | 45.25 | 1.625 | 32 | 2.506 | 1277.0 |
| SPFBL4000-D-CLN | 40 | 50.75 | BLIND | 47.25 | 1.625 | 36 | 2.609 | 1439.0 |
| SPFBL4200-D-CLN | 42 | 53.00 | BLIND | 49.50 | 1.625 | 36 | 2.729 | 1648.0 |
| SPFBL4400-D-CLN | 44 | 55.25 | BLIND | 51.75 | 1.625 | 40 | 2.849 | 1867.0 |
| SPFBL4600-D-CLN | 46 | 57.25 | BLIND | 53.75 | 1.625 | 40 | 2.952 | 2082.0 |
| SPFBL4800-D-CLN | 48 | 59.50 | BLIND | 56.00 | 1.625 | 44 | 3.072 | 2340.0 |
| SPFBL5000-D-CLN | 50 | 61.75 | BLIND | 58.25 | 1.875 | 44 | 3.196 | 2600.0 |
| SPFBL5200-D-CLN | 52 | 64.00 | BLIND | 60.50 | 1.875 | 44 | 3.315 | 2906.0 |
| SPFBL5400-D-CLN | 54 | 66.25 | BLIND | 62.75 | 1.875 | 44 | 3.435 | 3235.0 |
| SPFBL6000-D-CLN | 60 | 73.00 | BLIND | 69.25 | 1.875 | 52 | 3.779 | 4328.0 |
| SPFBL6600-D-CLN | 66 | 80.00 | BLIND | 76.00 | 1.875 | 52 | 4.136 | 5719.0 |
| SPFBL7200-D-CLN | 72 | 86.50 | BLIND | 82.50 | 1.875 | 60 | 4.480 | 7245.0 |
