Split ring type inserts are used with backing flanges. These are made of Cast iron with asbestos lining. New inserts made of suitable composite rubber material are being introduced and are presently supplied for 25 and 150DN size.

Cat.Ref.	DN	D	D1	L	Type
CA	25	50	34	20	A
CA	40	65	48	10	A
CA	50	80	61	8	B
CA	80	111	90	9	B
CA	100	147	119	10	B
CA	150	195	168	10	B
CA	225	280	240	10	B
CA	300	361	324	10	B
CA	400	474	431	12	B
CA	450	555	500	18	B
CA	600	684	634	10	C