Cv-values: QM2

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Series	Code	Description
M2	QM2	NELES SEAT SUPPORTED VALVE SERIES M2, WITH Q-TRIM VARIANT (Q-TRIM)

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IMO

Technical bulletin

The XMBV is an update of the original MBV. XMBV is a seat supported valve, available with variety of metal seat constructions, body extensions, materials and other special features. Small sizes have one-piece body construction while larger sizes have split body construction. Pressure classes ANSI 150 and 300, DIN PN 10...40 are available as flanged versions. Size range is DN 25...200 (1"...8"). Pressure class ANSI 600, DIN PN 63…100 size range is DN25…DN100 (1"…4"). M1/M2 series valves' sizing calculations can be made with this Nelprof™ code as well. M1/M2 size range is DN 25...300 (1"...12").

C_v-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
50	2	0	1.92	4.46	7.29	10.8	14	17.7	23.4	32.6	61.3	84
80	3	0	5.64	11.9	17.5	23.9	31.7	43	64	95	179	245
100	4	0	7.84	17.6	30.6	42.2	56.5	82	127	199	379	530
150	6	0	18.8	43.8	71.9	109	159	226	325	499	869	1360
200	8	0	32	76	124	188	274	390	561	863	1496	2330
250	10	0	54	126	207	313	457	650	935	1438	2502	3920
300	12	0	78	181	297	450	656	933	1343	2066	3586	5600

C_v/d²-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
50	2	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
80	3	0	0.066	0.066	0.1	0.14	0.16	0.17	0.18	0.19	0.205	0.205
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

F_L-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
50	2	0	0.91	0.92	0.92	0.93	0.93	0.92	0.91	0.89	0.79	0.71
80	3	0	0.91	0.92	0.93	0.93	0.93	0.92	0.9	0.87	0.73	0.62
100	4	0	0.91	0.92	0.93	0.93	0.93	0.92	0.89	0.84	0.67	0.56
150	6	0	0.91	0.92	0.93	0.93	0.92	0.91	0.88	0.82	0.66	0.51
200	8	0	0.91	0.92	0.93	0.93	0.92	0.91	0.88	0.82	0.67	0.52
250	10	0	0.91	0.92	0.93	0.93	0.92	0.91	0.88	0.81	0.65	0.49
300	12	0	0.91	0.92	0.93	0.93	0.92	0.91	0.88	0.81	0.65	0.49

X_T-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
50	2	0	0.82	0.83	0.83	0.83	0.82	0.8	0.76	0.67	0.41	0.35
80	3	0	0.82	0.83	0.83	0.83	0.82	0.79	0.72	0.56	0.36	0.28
100	4	0	0.82	0.83	0.83	0.83	0.82	0.79	0.68	0.49	0.32	0.21
150	6	0	0.82	0.83	0.83	0.82	0.8	0.75	0.63	0.44	0.32	0.16
200	8	0	0.82	0.83	0.83	0.82	0.8	0.75	0.64	0.46	0.33	0.17
250	10	0	0.82	0.83	0.83	0.82	0.8	0.74	0.61	0.43	0.31	0.14
300	12	0	0.82	0.83	0.83	0.82	0.8	0.74	0.62	0.43	0.31	0.14

z-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
50	2	0	0.56	0.55	0.54	0.52	0.51	0.49	0.47	0.43	0.34	0.3
80	3	0	0.56	0.55	0.54	0.52	0.51	0.48	0.45	0.4	0.31	0.27
100	4	0	0.56	0.55	0.54	0.52	0.51	0.48	0.44	0.37	0.29	0.23
150	6	0	0.56	0.55	0.54	0.52	0.49	0.46	0.42	0.35	0.29	0.2
200	8	0	0.56	0.55	0.54	0.52	0.49	0.46	0.42	0.36	0.29	0.21
250	10	0	0.56	0.55	0.53	0.52	0.49	0.46	0.41	0.35	0.28	0.19
300	12	0	0.56	0.55	0.53	0.52	0.49	0.46	0.42	0.35	0.28	0.19

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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