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These flanges are used to couple a glass ends to glass ends or to a below.Backing flanges are made up of cast iron and are used with inserts.They can normally be supplied in various grades of stainless steel on special order.
| Cat Ref | DN | D | D1 | D2 | C | N x d | L | L1 |
|
| GCF 25 | 25 | 95 | 43 | 51 | 70 | 3 x 7 | 10 | 6 | |
| GCF 40 | 40 | 110 | 58 | 66 | 86 | 3 x 9 | 10 | 6 | |
| GCF 50 | 50 | 120 | 70 | 81 | 98 | 3 x 9 | 12 | 8 | |
| GCF 80 | 80 | 155 | 101 | 112 | 133 | 6 x 9 | 12 | 9 | |
| GCF 100 | 100 | 200 | 134 | 148 | 178 | 6 x 9 | 12 | 9 | |
| GCF 150 | 150 | 275 | 186 | 196 | 254 | 6 x 9 | 15 | 9 | |
| GCF 225 | 225 | 350 | 260 | 282 | 310 | 8 x 11 | 28 | 7 | |
| GCF 300 | 300 | 425 | 342 | 363 | 395 | 12 x 11 | 34 | 7 | |
| GCF 450 | 450 | 630 | 537 | 557 | 585 | 12 x 14 | 37 | 7 | |
| GCF 600 | 600 | 755 | 643 | 690 | 710 | 12 x 14 | 50 | 5 |
