Cv-values: QLMD2

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Series	Code	Description
D2	QLMD2	NELES TRUNNION MOUNTED BALL VALVE SERIES D2, CLASS 150-300, WITH QLM TRIM VARIANT (QLM)

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IMO

Technical bulletin

Special QLM-trim is designed for maximum cavitation abatement and shall be used in applications where standard Q-Trim is not providing sufficient cavitation resistance, occurring typically in high differential pressure/mall flow situations. The design is tight bi-directionally with two seats. Full noise/cavitation attenuation capability is achieved in one flow direction only. Size range is DN 300...900 (12"...36") in pressure class ANSI 150, DN 100...900 (4"...36") in ANSI 300 and DN 50...600 (2"...24") in ANSI 600.

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	4.07	10.4	20.4	35.2	52.9	75	113	176	306	385
150	6	0	10.3	26.3	51.7	89	134	190	288	447	780	990
200	8	0	18	45.9	90	156	235	331	502	779	1356	1710
250	10	0	29	74	145	251	378	533	808	1250	2191	2760
300	12	0	41.7	106	208	360	542	766	1160	1800	3133	3950
350	14	0	53.1	135	265	459	691	976	1480	2290	3981	5000
400	16	0	72.4	184	362	625	941	1330	2010	3130	5434	6840
450	18	0	90.5	230	453	782	1180	1660	2520	3910	6790	8540
500	20	0	112	286	561	969	1460	2060	3120	4850	8406	10600
600	24	0	168	428	842	1450	2190	3090	4680	7270	12610	15910
700	28	0	224	571	1120	1940	2920	4120	6240	9690	16796	21200
750	30	0	259	658	1290	2230	3360	4750	7190	11200	19360	24400
900	36	0	374	952	1870	3230	4860	6870	10400	16200	28077	35300

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	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
150	6	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
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
700	28	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
750	30	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
900	36	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
100	4	0	0.97	0.97	0.97	0.97	0.96	0.94	0.91	0.86	0.78	0.71
150	6	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.84	0.75	0.65
200	8	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.85	0.76	0.67
250	10	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.84	0.75	0.65
300	12	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.84	0.75	0.65
350	14	0	0.97	0.97	0.97	0.97	0.95	0.93	0.91	0.85	0.77	0.69
400	16	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.85	0.76	0.67
450	18	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.85	0.76	0.67
500	20	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.85	0.76	0.67
600	24	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.84	0.75	0.65
700	28	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.84	0.76	0.66
750	30	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.84	0.76	0.66
900	36	0	0.97	0.97	0.97	0.97	0.95	0.93	0.9	0.84	0.75	0.66

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	0.83	0.83	0.82	0.8	0.75	0.63	0.47	0.34	0.28
150	6	0	0.82	0.83	0.83	0.82	0.79	0.72	0.58	0.42	0.31	0.25
200	8	0	0.82	0.83	0.83	0.82	0.79	0.73	0.59	0.43	0.31	0.26
250	10	0	0.82	0.83	0.83	0.82	0.79	0.72	0.57	0.41	0.3	0.25
300	12	0	0.82	0.83	0.83	0.82	0.79	0.72	0.57	0.41	0.31	0.25
350	14	0	0.82	0.83	0.83	0.82	0.8	0.74	0.6	0.44	0.32	0.27
400	16	0	0.82	0.83	0.83	0.82	0.79	0.73	0.58	0.42	0.31	0.26
450	18	0	0.82	0.83	0.83	0.82	0.79	0.73	0.59	0.43	0.31	0.26
500	20	0	0.82	0.83	0.83	0.82	0.79	0.73	0.59	0.43	0.31	0.26
600	24	0	0.82	0.83	0.83	0.82	0.79	0.72	0.57	0.41	0.3	0.25
700	28	0	0.82	0.83	0.83	0.82	0.79	0.72	0.58	0.42	0.31	0.26
750	30	0	0.82	0.83	0.83	0.82	0.79	0.72	0.58	0.42	0.31	0.25
900	36	0	0.82	0.83	0.83	0.82	0.79	0.72	0.58	0.41	0.31	0.25

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	0.6	0.6	0.6	0.59	0.57	0.54	0.49	0.43	0.35	0.31
150	6	0	0.6	0.6	0.6	0.58	0.56	0.53	0.47	0.41	0.33	0.28
200	8	0	0.6	0.6	0.6	0.58	0.56	0.53	0.48	0.42	0.33	0.29
250	10	0	0.6	0.6	0.6	0.58	0.56	0.53	0.47	0.41	0.33	0.28
300	12	0	0.6	0.6	0.6	0.58	0.56	0.53	0.47	0.41	0.33	0.28
350	14	0	0.6	0.6	0.6	0.58	0.56	0.54	0.48	0.42	0.34	0.3
400	16	0	0.6	0.6	0.6	0.58	0.56	0.53	0.48	0.42	0.33	0.29
450	18	0	0.6	0.6	0.6	0.58	0.56	0.53	0.48	0.42	0.33	0.29
500	20	0	0.6	0.6	0.6	0.58	0.56	0.53	0.48	0.42	0.33	0.29
600	24	0	0.6	0.6	0.6	0.58	0.56	0.53	0.47	0.41	0.33	0.28
700	28	0	0.6	0.6	0.6	0.58	0.56	0.53	0.47	0.41	0.33	0.28
750	30	0	0.6	0.6	0.6	0.58	0.56	0.53	0.47	0.41	0.33	0.28
900	36	0	0.6	0.6	0.6	0.58	0.56	0.53	0.47	0.41	0.33	0.28

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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