Cv-values: RA

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Series	Code	Description
RA	RA_1S	NELES RA SERIES V-PORT SEGMENT VALVE, TWO WAY TIGHT 1S SEAT

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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	0.79	1.77	3.17	4.97	7.35	10.3	14.7	21.8	23.2	24
40	1.5	0	0.72	2.38	4.81	8.12	12.7	17.8	24.2	37.8	53.7	58
50	2	0	1.42	4.72	9.55	16.1	25.2	35.2	48	75.1	107	115
65	2.5	0	2.61	8.61	16.6	25.4	39.1	55.5	72.9	97.7	147	210
80	3	0	4.24	14	27.1	41.3	63.6	90.3	119	160	239	342
100	4	0	6.33	20.9	40.3	61.7	94.8	134	177	238	357	510
150	6	0	14.4	47.6	91.6	140	216	306	402	542	812	1160
200	8	0	23.7	78.4	151	231	355	505	663	892	1337	1910
250	10	0	37.8	125	241	369	567	805	1058	1425	2135	3050

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
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	0.91	0.88	0.85	0.82	0.78	0.71	0.69	0.68
40	1.5	0	0.94	0.93	0.93	0.91	0.87	0.85	0.81	0.76	0.69	0.66
50	2	0	0.94	0.93	0.92	0.9	0.86	0.84	0.8	0.74	0.65	0.63
65	2.5	0	0.94	0.93	0.92	0.9	0.87	0.84	0.81	0.77	0.69	0.58
80	3	0	0.94	0.93	0.92	0.89	0.86	0.82	0.79	0.75	0.66	0.53
100	4	0	0.94	0.93	0.92	0.9	0.87	0.84	0.81	0.78	0.7	0.6
150	6	0	0.94	0.93	0.92	0.9	0.87	0.84	0.81	0.78	0.7	0.6
200	8	0	0.94	0.93	0.92	0.91	0.87	0.85	0.82	0.79	0.72	0.62
250	10	0	0.94	0.93	0.92	0.9	0.87	0.85	0.82	0.79	0.71	0.61

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	0.59	0.55	0.49	0.39	0.38	0.37
40	1.5	0	0.64	0.64	0.64	0.63	0.61	0.59	0.54	0.46	0.37	0.36
50	2	0	0.64	0.64	0.63	0.62	0.6	0.57	0.53	0.43	0.35	0.34
65	2.5	0	0.64	0.64	0.63	0.62	0.61	0.57	0.53	0.48	0.38	0.3
80	3	0	0.64	0.64	0.63	0.62	0.6	0.55	0.51	0.45	0.35	0.26
100	4	0	0.64	0.64	0.63	0.63	0.61	0.58	0.54	0.49	0.39	0.31
150	6	0	0.64	0.64	0.63	0.63	0.61	0.58	0.54	0.49	0.39	0.31
200	8	0	0.64	0.64	0.63	0.63	0.61	0.59	0.55	0.5	0.4	0.33
250	10	0	0.64	0.64	0.63	0.63	0.61	0.58	0.55	0.5	0.39	0.32

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	0.38	0.35	0.32	0.28	0.24	0.24	0.23
40	1.5	0	0.44	0.43	0.42	0.4	0.37	0.35	0.31	0.27	0.23	0.22
50	2	0	0.44	0.43	0.42	0.39	0.36	0.34	0.3	0.26	0.22	0.21
65	2.5	0	0.44	0.43	0.41	0.39	0.37	0.34	0.31	0.28	0.24	0.19
80	3	0	0.44	0.43	0.41	0.38	0.36	0.32	0.29	0.27	0.22	0.18
100	4	0	0.44	0.43	0.41	0.4	0.37	0.34	0.31	0.28	0.24	0.2
150	6	0	0.44	0.43	0.41	0.4	0.37	0.34	0.31	0.28	0.24	0.2
200	8	0	0.44	0.43	0.42	0.4	0.37	0.35	0.32	0.29	0.25	0.2
250	10	0	0.44	0.43	0.42	0.4	0.37	0.35	0.32	0.29	0.25	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