Cv-values: RA

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Series	Code	Description
RA	RA	NELES RA SERIES V-PORT SEGMENT VALVE, METAL 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	0.52	1.13	2.23	3.83	5.95	8.58	11.7	16.2	24.1	45
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	1.33	3.27	6.44	11.1	17.2	24.8	33.9	46.5	69.3	110
50	2	0	2.05	5.07	10	17.2	26.6	38.4	52.5	72.4	108	163
65	2.5	0	3.26	8.02	15.9	27.3	42.3	61	83.4	114	170	280
80	3	0	4.73	11.6	23	39.4	61	88.2	121	165	246	420
100	4	0	7.57	18.6	36.8	63.1	97.7	141	193	264	393	620
150	6	0	13.9	34.1	67.2	115	178	258	352	484	719	1260
200	8	0	22.5	55.3	109	187	290	418	571	784	1164	2030
250	10	0	35.3	86.9	171	294	455	658	900	1236	1831	3210

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	0.75	0.81	0.86	0.89	0.9	0.91	0.91	0.93	0.95	0.98
25	1	1	0.682	0.849	0.885	0.885	0.873	0.847	0.832	0.818	0.817	0.823
25	1	2	0.877	0.88	0.82	0.748	0.701	0.673	0.646	0.635	0.634	0.643
25	1	3	0.885	0.774	0.681	0.602	0.542	0.503	0.471	0.45	0.439	0.432
25	1	4	0.77	0.569	0.475	0.406	0.359	0.332	0.311	0.297	0.29	0.285
40	1.5	0	0.71	0.79	0.83	0.86	0.9	0.93	0.96	0.96	0.98	0.98
50	2	0	0.71	0.8	0.84	0.88	0.9	0.93	0.96	0.97	0.98	0.99
65	2.5	0	0.73	0.79	0.82	0.86	0.89	0.92	0.95	0.97	0.98	0.99
80	3	0	0.69	0.77	0.81	0.85	0.88	0.91	0.94	0.96	0.97	0.98
100	4	0	0.641	0.753	0.8	0.84	0.878	0.915	0.945	0.966	0.978	0.985
150	6	0	0.7	0.77	0.81	0.84	0.89	0.93	0.96	0.98	0.98	0.98
200	8	0	0.68	0.75	0.79	0.83	0.88	0.92	0.96	0.98	0.98	0.98
250	10	0	0.69	0.74	0.78	0.83	0.87	0.91	0.95	0.97	0.98	0.98

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	0.9	0.87	0.84	0.8	0.77	0.68	0.46
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	0.88	0.85	0.81	0.78	0.72	0.61	0.42
50	2	0	0.94	0.93	0.92	0.89	0.86	0.83	0.79	0.75	0.65	0.46
65	2.5	0	0.94	0.93	0.92	0.89	0.86	0.82	0.79	0.75	0.65	0.46
80	3	0	0.94	0.93	0.92	0.89	0.86	0.82	0.79	0.75	0.65	0.44
100	4	0	0.94	0.93	0.92	0.9	0.87	0.84	0.8	0.76	0.68	0.53
150	6	0	0.94	0.94	0.93	0.91	0.88	0.86	0.82	0.79	0.73	0.57
200	8	0	0.94	0.94	0.93	0.92	0.89	0.86	0.83	0.8	0.75	0.6
250	10	0	0.94	0.94	0.93	0.92	0.89	0.86	0.83	0.8	0.75	0.6

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	0.63	0.61	0.58	0.53	0.47	0.37	0.19
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	0.62	0.59	0.54	0.49	0.4	0.32	0.16
50	2	0	0.64	0.64	0.63	0.62	0.6	0.56	0.51	0.44	0.35	0.19
65	2.5	0	0.64	0.64	0.63	0.62	0.6	0.56	0.51	0.44	0.35	0.2
80	3	0	0.64	0.64	0.63	0.62	0.6	0.56	0.51	0.44	0.35	0.18
100	4	0	0.64	0.64	0.63	0.62	0.61	0.57	0.53	0.47	0.37	0.25
150	6	0	0.64	0.64	0.64	0.63	0.62	0.6	0.56	0.51	0.41	0.28
200	8	0	0.64	0.64	0.64	0.63	0.62	0.6	0.57	0.52	0.44	0.31
250	10	0	0.64	0.64	0.64	0.63	0.62	0.6	0.57	0.52	0.44	0.31

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	0.42	0.4	0.37	0.34	0.3	0.27	0.23	0.17
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	0.41	0.38	0.35	0.31	0.28	0.25	0.2	0.16
50	2	0	0.44	0.43	0.42	0.39	0.36	0.33	0.29	0.26	0.22	0.17
65	2.5	0	0.44	0.43	0.41	0.39	0.36	0.32	0.29	0.26	0.22	0.17
80	3	0	0.44	0.43	0.41	0.39	0.36	0.32	0.29	0.26	0.22	0.16
100	4	0	0.44	0.43	0.42	0.39	0.37	0.34	0.3	0.27	0.23	0.18
150	6	0	0.44	0.44	0.42	0.41	0.38	0.36	0.32	0.29	0.25	0.19
200	8	0	0.44	0.44	0.43	0.41	0.39	0.36	0.33	0.3	0.26	0.2
250	10	0	0.44	0.44	0.43	0.41	0.39	0.36	0.33	0.3	0.26	0.2

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File creation day: 22.4.2024 (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