Cv-values: RASOFT

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Series	Code	Description
RA	RASOFT	NELES RA SERIES V-PORT SEGMENT VALVE, SOFT SEATED

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IMO

Technical bulletin

This new generation control valve is based on R1-series and carries the appreciated qualities of this design. Improvements are made in trim and stem packing to reduce friction and eliminate mechanical clearances. The new RA is the valve, which can truly help to improve process performance and reduce variability. Available with small Cv trims. Available in wafer bodies to fit ANSI 150 and 300; DIN 10, 16, 25 and 40; and JIS 10, 16 and 20 pipe flanges

C_v-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
25	1	0	0.693	1.55	2.77	4.35	6.43	9.03	12.9	19.1	20.3	21
25	1	1	0.48	0.89	1.4	2.09	2.91	4.06	5.63	7.66	10.7	15
25	1	2	0.241	0.445	0.649	0.883	1.17	1.54	2.04	2.77	3.76	5
25	1	3	0.1	0.2	0.31	0.41	0.54	0.67	0.83	1.02	1.26	1.55
25	1	4	0.03	0.06	0.1	0.14	0.185	0.235	0.285	0.345	0.42	0.5
40	1.5	0	0.756	2.5	5.06	8.54	13.4	18.7	25.4	39.8	56.5	61
50	2	0	1.36	4.51	9.13	15.4	24.1	33.7	45.9	71.8	102	110
65	2.5	0	2.67	8.82	17	26	40	56.8	74.6	100	151	215
80	3	0	4.22	13.9	26.9	41.1	63.2	89.8	118	159	238	340
100	4	0	6.45	21.3	41.1	62.9	96.7	137	180	243	364	520
150	6	0	13.3	43.9	84.5	129	199	282	371	500	749	1070
200	8	0	21.8	72.2	139	213	327	465	611	822	1232	1760
250	10	0	35.1	116	224	342	526	747	982	1322	1981	2830

C_v/d²-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
25	1	0	0.741	0.848	0.886	0.914	0.937	0.956	0.971	0.985	0.999	1
25	1	1	0.548	0.825	0.889	0.903	0.897	0.887	0.87	0.858	0.882	0.903
25	1	2	0.808	0.904	0.849	0.789	0.735	0.699	0.676	0.66	0.664	0.699
25	1	3	0.875	0.819	0.718	0.641	0.583	0.537	0.503	0.477	0.472	0.483
25	1	4	0.849	0.625	0.509	0.438	0.391	0.355	0.331	0.314	0.312	0.312
40	1.5	0	0.737	0.823	0.862	0.892	0.919	0.944	0.964	0.978	0.991	1
50	2	0	0.737	0.824	0.865	0.894	0.921	0.943	0.962	0.977	0.992	1
65	2.5	0	0.764	0.812	0.845	0.875	0.902	0.928	0.952	0.969	0.979	0.998
80	3	0	0.727	0.802	0.841	0.872	0.901	0.926	0.947	0.965	0.978	0.992
100	4	0	0.715	0.787	0.829	0.865	0.897	0.926	0.951	0.97	0.982	0.995
150	6	0	0.724	0.786	0.826	0.861	0.895	0.93	0.957	0.975	0.984	0.995
200	8	0	0.715	0.771	0.812	0.851	0.888	0.926	0.955	0.974	0.984	0.995
250	10	0	0.709	0.758	0.799	0.839	0.877	0.916	0.947	0.968	0.98	0.993

F_L-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
25	1	0	0.94	0.93	0.92	0.89	0.86	0.83	0.8	0.74	0.72	0.72
25	1	1	0.94	0.94	0.93	0.93	0.92	0.9	0.87	0.85	0.81	0.78
25	1	2	0.94	0.94	0.94	0.94	0.93	0.93	0.93	0.92	0.9	0.88
25	1	3	0.94	0.94	0.94	0.94	0.94	0.94	0.94	0.94	0.93	0.93
25	1	4	0.94	0.94	0.94	0.94	0.94	0.94	0.94	0.94	0.94	0.94
40	1.5	0	0.94	0.93	0.92	0.9	0.87	0.84	0.81	0.75	0.67	0.65
50	2	0	0.94	0.93	0.92	0.9	0.87	0.84	0.81	0.75	0.67	0.65
65	2.5	0	0.94	0.93	0.92	0.89	0.86	0.83	0.8	0.77	0.68	0.57
80	3	0	0.94	0.93	0.92	0.89	0.86	0.82	0.79	0.75	0.66	0.54
100	4	0	0.94	0.93	0.92	0.9	0.87	0.84	0.81	0.78	0.7	0.59
150	6	0	0.94	0.93	0.92	0.91	0.87	0.85	0.82	0.79	0.72	0.62
200	8	0	0.94	0.93	0.92	0.91	0.88	0.85	0.83	0.8	0.74	0.65
250	10	0	0.94	0.93	0.92	0.91	0.88	0.85	0.82	0.79	0.73	0.64

X_T-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
25	1	0	0.64	0.64	0.63	0.62	0.6	0.57	0.52	0.43	0.41	0.4
25	1	1	0.64	0.64	0.64	0.64	0.63	0.62	0.61	0.59	0.54	0.49
25	1	2	0.64	0.64	0.64	0.64	0.64	0.64	0.64	0.63	0.63	0.62
25	1	3	0.64	0.64	0.64	0.64	0.64	0.64	0.64	0.64	0.64	0.64
25	1	4	0.64	0.64	0.64	0.64	0.64	0.64	0.64	0.64	0.64	0.64
40	1.5	0	0.64	0.64	0.63	0.63	0.61	0.58	0.54	0.45	0.36	0.35
50	2	0	0.64	0.64	0.63	0.63	0.61	0.58	0.53	0.44	0.36	0.35
65	2.5	0	0.64	0.64	0.63	0.62	0.6	0.57	0.53	0.48	0.37	0.29
80	3	0	0.64	0.64	0.63	0.62	0.6	0.56	0.51	0.45	0.35	0.26
100	4	0	0.64	0.64	0.63	0.62	0.61	0.58	0.54	0.49	0.38	0.3
150	6	0	0.64	0.64	0.63	0.63	0.61	0.59	0.55	0.5	0.4	0.33
200	8	0	0.64	0.64	0.63	0.63	0.62	0.59	0.56	0.52	0.42	0.35
250	10	0	0.64	0.64	0.63	0.63	0.62	0.59	0.56	0.51	0.41	0.34

z-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
25	1	0	0.44	0.43	0.41	0.39	0.36	0.33	0.3	0.26	0.25	0.25
25	1	1	0.44	0.44	0.43	0.42	0.41	0.39	0.37	0.35	0.31	0.28
25	1	2	0.44	0.44	0.44	0.44	0.43	0.43	0.42	0.41	0.4	0.38
25	1	3	0.44	0.44	0.44	0.44	0.44	0.44	0.44	0.44	0.43	0.43
25	1	4	0.44	0.44	0.44	0.44	0.44	0.44	0.44	0.44	0.44	0.44
40	1.5	0	0.44	0.43	0.42	0.4	0.37	0.34	0.31	0.27	0.23	0.22
50	2	0	0.44	0.43	0.42	0.4	0.37	0.34	0.31	0.26	0.23	0.22
65	2.5	0	0.44	0.43	0.41	0.39	0.36	0.33	0.3	0.28	0.23	0.19
80	3	0	0.44	0.43	0.41	0.39	0.36	0.32	0.29	0.27	0.22	0.18
100	4	0	0.44	0.43	0.41	0.39	0.37	0.34	0.31	0.28	0.24	0.2
150	6	0	0.44	0.43	0.42	0.4	0.37	0.35	0.32	0.29	0.25	0.21
200	8	0	0.44	0.43	0.42	0.4	0.38	0.35	0.33	0.3	0.26	0.22
250	10	0	0.44	0.43	0.42	0.4	0.38	0.35	0.32	0.29	0.25	0.21

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File creation day: 13.1.2025 (day.month.year)

Cv-values

Cv/d2-values

FL-values

XT-values

z-values

C_v-values

C_v/d²-values

F_L-values

X_T-values