Cv-values: QD5

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Series	Code	Description
D5	QD5	NELES TRUNNION MOUNTED BALL VALVE SERIES D5, CLASS 150-300, REDUCED PORT, WITH Q-TRIM VARIANT (Q-TRIM)

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IMO

Technical bulletin

The D-series valve is a rotary control valve, a trunnion mounted, reduced bore ball valve featuring the Stemball™ concept, combined with effective noise/cavitation attenuation. The Q-D valves are supplied as unidirectional one-seated version with specially designed ball control element to achieve improved noise/cavitation attenuation in gas, steam and liquid applications. The control seat is spring-loaded, capable of easing the contact on ball when throttling to eliminate friction, but assuring durable tightness at shut-off. Size range is DN 200...600 (8"...24").

C_v-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
200	8	0	17.2	40.8	66.5	101	147	209	301	463	803	1250
250	10	0	30.9	73.4	120	182	265	377	542	833	1445	2250
300	12	0	51.5	122	200	303	441	628	903	1389	2408	3750
350	14	0	74.2	176	287	436	635	904	1300	2000	3467	5400
400	16	0	92	219	357	541	788	1121	1613	2482	4302	6700
450	18	0	124	294	479	726	1058	1506	2167	3333	5779	9000
500	20	0	172	408	665	1009	1470	2092	3010	4630	8026	12500
600	24	0	210	499	814	1235	1799	2561	3684	5667	9824	15300

C_v/d²-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
200	8	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
250	10	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
300	12	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
350	14	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
400	16	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
450	18	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
500	20	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
600	24	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205

F_L-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
200	8	0	0.91	0.91	0.92	0.92	0.93	0.93	0.92	0.9	0.83	0.73
250	10	0	0.91	0.91	0.92	0.92	0.93	0.93	0.92	0.89	0.8	0.69
300	12	0	0.91	0.91	0.92	0.93	0.93	0.92	0.91	0.88	0.77	0.64
350	14	0	0.91	0.91	0.92	0.93	0.93	0.92	0.9	0.87	0.75	0.62
400	16	0	0.91	0.91	0.92	0.93	0.93	0.92	0.91	0.88	0.77	0.64
450	18	0	0.91	0.91	0.92	0.93	0.93	0.92	0.9	0.87	0.75	0.62
500	20	0	0.91	0.92	0.92	0.93	0.93	0.92	0.9	0.85	0.72	0.58
600	24	0	0.91	0.91	0.92	0.93	0.93	0.92	0.91	0.87	0.76	0.63

X_T-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
200	8	0	0.82	0.82	0.83	0.83	0.83	0.82	0.8	0.72	0.5	0.35
250	10	0	0.82	0.82	0.83	0.83	0.83	0.81	0.78	0.66	0.44	0.31
300	12	0	0.82	0.82	0.83	0.83	0.82	0.8	0.75	0.6	0.39	0.26
350	14	0	0.82	0.82	0.83	0.83	0.82	0.8	0.74	0.57	0.37	0.24
400	16	0	0.82	0.82	0.83	0.83	0.82	0.8	0.75	0.6	0.39	0.26
450	18	0	0.82	0.82	0.83	0.83	0.82	0.8	0.74	0.57	0.37	0.24
500	20	0	0.82	0.83	0.83	0.83	0.82	0.78	0.7	0.53	0.34	0.22
600	24	0	0.82	0.82	0.83	0.83	0.82	0.8	0.74	0.59	0.38	0.25

z-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
200	8	0	0.56	0.56	0.55	0.55	0.53	0.51	0.49	0.45	0.38	0.31
250	10	0	0.56	0.56	0.55	0.54	0.52	0.5	0.47	0.43	0.35	0.29
300	12	0	0.56	0.56	0.55	0.53	0.52	0.49	0.46	0.41	0.33	0.27
350	14	0	0.56	0.56	0.55	0.53	0.51	0.49	0.46	0.4	0.33	0.26
400	16	0	0.56	0.56	0.55	0.53	0.52	0.49	0.46	0.41	0.33	0.27
450	18	0	0.56	0.56	0.55	0.53	0.51	0.49	0.46	0.4	0.33	0.26
500	20	0	0.56	0.55	0.54	0.53	0.51	0.48	0.44	0.39	0.31	0.24
600	24	0	0.56	0.56	0.55	0.53	0.52	0.49	0.46	0.41	0.33	0.27

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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