VALVE SIZE		A1 (RF)		A2 (RTJ)		A3 (BW)		A4 (SW)		W
NPS	DN	In	mm	in	mm	in	mm	in	mm	in	mm
1/2	15	6.50	165	–	–	6.50	165	6.50	165	4.72	120
3/4	20	7.50	190	–	–	7.50	190	7.50	190	5.52	140
1	25	8.50	216	–	–	8.50	216	8.50	216	6.49	165
1 1/2	40	9.50	241	–	–	9.50	241	9.50	241	7.87	200
2	50	11.50	292	11.62	295	11.50	292	11.50	292	9.06	230
3	80	14.00	356	14.12	359	14.00	356	14.00	356	15.75	400
4	100	17.00	432	17.12	435	17.00	432	17.00	432	18.11	460
6	150	22.00	559	22.12	562	22.00	559	22.00	559	21.65	550