Cv-values: D2

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Series	Code	Description
D2	D2	NELES TRUNNION MOUNTED BALL VALVE SERIES D2, CLASS 150-300

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IMO

Technical bulletin

The D-series valve is a rotary control valve, a trunnion mounted, full bore ball valve featuring the Stemball™ concept. D-series offers unsurpassed control stability, wide rangeability and tight shut-off with all-metal seats. The control seat is springloaded, capable of easing the contact on ball when throttling to eliminate friction, but assuring durable tightness at shut-off. Alternatively, continuous contact seats are available when this is advantageous in the service. The D-series valves are available as one or two-seated versions and can be used in on-off services, too. Size range is DN 100...900 (4"...36") in pressure classes ANSI 150, 300. ANSI 600 size range is DN 50...600 (2"...24").

C_v-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
100	4	0	9.72	25.9	48.6	81	124	179	313	545	989	2120
150	6	0	22.4	59.8	112	187	286	413	757	1318	2394	5100
200	8	0	39.7	106	199	331	506	732	1386	2413	4381	9300
250	10	0	62.8	167	314	523	800	1160	2244	3906	7092	15200
300	12	0	89.9	240	449	749	1150	1660	3306	5757	10452	22400
350	14	0	112	300	562	936	1430	2070	4177	7273	13205	28300
400	16	0	148	394	738	1230	1880	2720	5565	9689	17591	37700
450	18	0	188	502	942	1570	2400	3470	7085	12336	22397	48000
500	20	0	233	621	1160	1940	2790	4290	8782	15292	27763	59500
600	24	0	338	902	1690	2820	4310	6230	12738	22179	40268	86300
700	28	0	463	1240	2320	3860	5910	8530	17417	30326	55059	118000
750	30	0	533	1420	2660	4440	6790	9810	20074	34952	63458	136000
800	32	0	592	1580	2960	4942	7558	10915	22288	38807	70457	151000
900	36	0	752	2010	3760	6270	9590	13900	28339	49344	89587	192000

C_v/d²-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
100	4	0	0.426	0.656	0.774	0.853	0.907	0.944	0.968	0.982	0.998	1
150	6	0	0.503	0.686	0.794	0.869	0.921	0.956	0.979	0.992	0.998	1
200	8	0	0.54	0.7	0.802	0.874	0.925	0.958	0.98	0.992	0.998	1
250	10	0	0.528	0.694	0.798	0.872	0.923	0.958	0.979	0.992	0.998	1
300	12	0	0.566	0.712	0.809	0.879	0.927	0.96	0.981	0.993	0.998	1
350	14	0	0.547	0.702	0.803	0.875	0.925	0.959	0.98	0.992	0.998	1
400	16	0	0.554	0.705	0.805	0.876	0.926	0.959	0.98	0.992	0.998	1
450	18	0	0.58	0.719	0.814	0.881	0.929	0.961	0.981	0.993	0.998	1
500	20	0	0.542	0.699	0.801	0.874	0.925	0.959	0.98	0.992	0.998	1
600	24	0	0.549	0.702	0.803	0.875	0.925	0.959	0.98	0.992	0.998	1
700	28	0	0.547	0.716	0.811	0.88	0.928	0.961	0.981	0.993	0.998	1
750	30	0	0.584	0.72	0.814	0.88	0.928	0.961	0.981	0.993	0.998	1
800	32	0	0.584	0.72	0.814	0.88	0.928	0.961	0.981	0.993	0.998	1
900	36	0	0.584	0.72	0.814	0.88	0.928	0.961	0.981	0.993	0.998	1

F_L-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
100	4	0	0.91	0.91	0.9	0.88	0.86	0.82	0.75	0.67	0.55	0.35
150	6	0	0.91	0.91	0.9	0.88	0.85	0.81	0.74	0.66	0.54	0.32
200	8	0	0.91	0.91	0.9	0.88	0.85	0.81	0.73	0.65	0.53	0.31
250	10	0	0.91	0.91	0.9	0.88	0.85	0.81	0.73	0.64	0.53	0.29
300	12	0	0.91	0.91	0.9	0.88	0.85	0.81	0.73	0.64	0.52	0.28
350	14	0	0.91	0.91	0.9	0.88	0.86	0.82	0.73	0.65	0.54	0.31
400	16	0	0.91	0.91	0.9	0.88	0.86	0.82	0.73	0.65	0.53	0.31
450	18	0	0.91	0.91	0.9	0.88	0.86	0.82	0.73	0.65	0.53	0.3
500	20	0	0.91	0.91	0.9	0.88	0.86	0.82	0.73	0.65	0.53	0.3
600	24	0	0.91	0.91	0.9	0.88	0.86	0.82	0.73	0.65	0.53	0.3
700	28	0	0.91	0.91	0.9	0.88	0.86	0.82	0.73	0.65	0.53	0.3
750	30	0	0.91	0.91	0.9	0.88	0.86	0.82	0.73	0.65	0.53	0.29
800	32	0	0.91	0.91	0.9	0.88	0.86	0.82	0.73	0.65	0.53	0.3
900	36	0	0.91	0.91	0.9	0.88	0.86	0.82	0.73	0.65	0.53	0.3

X_T-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
100	4	0	0.82	0.82	0.8	0.75	0.68	0.6	0.43	0.3	0.18	0.08
150	6	0	0.82	0.82	0.8	0.75	0.68	0.6	0.41	0.28	0.18	0.07
200	8	0	0.82	0.82	0.8	0.75	0.68	0.6	0.41	0.28	0.17	0.06
250	10	0	0.82	0.82	0.8	0.75	0.68	0.59	0.4	0.27	0.17	0.06
300	12	0	0.82	0.82	0.8	0.75	0.68	0.6	0.39	0.27	0.17	0.05
350	14	0	0.82	0.82	0.8	0.76	0.7	0.62	0.41	0.28	0.17	0.07
400	16	0	0.82	0.82	0.8	0.76	0.69	0.62	0.41	0.28	0.17	0.06
450	18	0	0.82	0.82	0.8	0.76	0.69	0.61	0.4	0.28	0.17	0.06
500	20	0	0.82	0.82	0.8	0.76	0.7	0.61	0.4	0.28	0.17	0.06
600	24	0	0.82	0.82	0.8	0.76	0.69	0.61	0.4	0.27	0.17	0.06
700	28	0	0.82	0.82	0.8	0.76	0.69	0.61	0.4	0.27	0.17	0.06
750	30	0	0.82	0.82	0.8	0.76	0.69	0.61	0.4	0.27	0.17	0.06
800	32	0	0.82	0.82	0.8	0.76	0.69	0.62	0.41	0.28	0.17	0.06
900	36	0	0.82	0.82	0.8	0.76	0.69	0.61	0.4	0.28	0.17	0.06

z-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
100	4	0	0.52	0.51	0.47	0.42	0.37	0.31	0.23	0.16	0.09	0.07
150	6	0	0.52	0.51	0.47	0.42	0.37	0.31	0.22	0.15	0.09	0.06
200	8	0	0.52	0.51	0.47	0.42	0.37	0.31	0.21	0.15	0.09	0.06
250	10	0	0.52	0.51	0.47	0.42	0.37	0.31	0.21	0.14	0.09	0.06
300	12	0	0.52	0.51	0.47	0.42	0.37	0.31	0.21	0.14	0.09	0.06
350	14	0	0.52	0.51	0.47	0.43	0.38	0.32	0.22	0.15	0.09	0.06
400	16	0	0.52	0.51	0.47	0.43	0.38	0.32	0.21	0.15	0.09	0.06
450	18	0	0.52	0.51	0.47	0.43	0.38	0.32	0.21	0.15	0.09	0.06
500	20	0	0.52	0.51	0.47	0.43	0.39	0.32	0.21	0.14	0.09	0.06
600	24	0	0.52	0.51	0.47	0.43	0.38	0.32	0.21	0.14	0.09	0.06
700	28	0	0.52	0.51	0.47	0.43	0.37	0.32	0.21	0.14	0.09	0.06
750	30	0	0.52	0.51	0.47	0.43	0.37	0.32	0.21	0.14	0.09	0.06
800	32	0	0.52	0.51	0.47	0.43	0.38	0.32	0.21	0.15	0.09	0.06
900	36	0	0.52	0.51	0.47	0.43	0.38	0.32	0.21	0.15	0.09	0.06

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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