Split ring type inserts are used with backing flanges. These are made of Cast iron with asbestos lining. In addition, the insert is made of suitable composite rubber material for 25 DN to 150DN size. New Non-Asbestos (make Champion, Klinger ) insert is being introduced for 25DN to 300DN.
| Cat.Ref. | DN | D | D1 | L | TYPE |
| CN1 | 25 | 50 | 34 | 10 | A |
| CN1.5 | 40 | 65 | 48 | 10 | A |
| CN2 | 50 | 80 | 61 | 8 | B |
| CN3 | 80 | 111 | 90 | 9 | B |
| CN4 | 100 | 147 | 119 | 10 | B |
| CN6 | 150 | 195 | 168 | 10 | B |
| CN9 | 225 | 280 | 240 | 10 | B |
| CN12 | 300 | 361 | 324 | 10 | B |
| CN16 | 400 | 474 | 431 | 12 | B |
| CN18 | 450 | 555 | 500 | 18 | B |
| CN24 | 600 | 684 | 634 | 10 | C |
* marked items are available fast.
