VALVE SIZE		A1 (RF)		A2 (RTJ)		A3 (BW)		A4 (SW)
NPS	DN	In	mm	in	mm	in	mm	in	mm
2	50	10.50	267	11.12	283	10.50	267	10.50	267
2.5	65	11.50	292	12.12	308	11.50	292	11.50	292
3	80	12.50	318	13.12	334	12.50	318	12.50	318
4	100	14.00	356	14.62	372	14.00	356	14.00	356
5	125	15.75	400	16.37	416	15.75	400	15.75	400
6	150	17.50	444	18.12	460	17.50	444	17.50	444
8	200	21.00	533	21.62	549	21.00	533	21.00	533
10	250	24.50	622	25.12	638	24.50	622	24.50	622
12	300	28.00	711	28.62	727	28.00	711	28.00	711
14	350	33.00	838	33.62	854	33.00	838	33.00	838
16	400	34.00	864	34.62	879	34.00	864	34.00	864
18	450	38.50	978	39.12	994	38.50	978	38.50	978
20	500	40.00	1016	40.62	1035	40.00	1016	40.00	1016