Cv-values: XMBV

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Series	Code	Description
XA	XMBV	NELES SEAT SUPPORTED VALVE SERIES XA

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IMO

Technical bulletin

The X-MBVR is a seat supported ball valve with full port flow bore. Variety of metal seat constructions, body extensions, materials and other special features are offered. DN 80...200 (3"...8"). Pressure classes ANSI 150 and 300 and 600, EN PN 10...63 are available as flanged versions.

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	0.676	1.51	2.81	4.89	7.7	11.5	17	26	46.6	105
40	1.5	0	1.65	3.6	6.75	11.9	18.6	28.4	45.5	75	126	250
50	2	0	2.48	5.4	10.1	17.8	27.9	42.5	70.8	123	224	490
80	3	0	5.94	15.8	29.7	49.5	75.7	109	177	308	560	1160
100	4	0	9.72	25.9	48.6	81	124	179	313	545	989	2200
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

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	0.468	0.668	0.782	0.854	0.916	0.954	0.976	0.991	0.998	1
40	1.5	0	0.468	0.668	0.782	0.854	0.916	0.954	0.976	0.991	0.998	1
50	2	0	0.468	0.668	0.782	0.854	0.916	0.954	0.976	0.991	0.998	1
80	3	0	0.475	0.672	0.784	0.855	0.918	0.954	0.977	0.991	0.998	1
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

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	0.91	0.91	0.9	0.88	0.86	0.81	0.77	0.71	0.61	0.43
40	1.5	0	0.91	0.91	0.9	0.88	0.85	0.8	0.74	0.67	0.57	0.41
50	2	0	0.91	0.91	0.9	0.89	0.86	0.82	0.76	0.68	0.57	0.38
80	3	0	0.91	0.91	0.9	0.88	0.85	0.81	0.74	0.67	0.55	0.36
100	4	0	0.91	0.91	0.9	0.88	0.86	0.82	0.75	0.67	0.55	0.33
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

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	0.82	0.82	0.8	0.76	0.69	0.6	0.48	0.37	0.24	0.12
40	1.5	0	0.82	0.82	0.8	0.75	0.67	0.57	0.42	0.3	0.19	0.11
50	2	0	0.82	0.82	0.81	0.77	0.7	0.62	0.47	0.32	0.19	0.1
80	3	0	0.82	0.82	0.79	0.74	0.67	0.58	0.43	0.3	0.18	0.09
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

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	0.52	0.51	0.48	0.43	0.37	0.31	0.25	0.19	0.12	0.08
40	1.5	0	0.52	0.51	0.47	0.42	0.36	0.29	0.22	0.16	0.09	0.07
50	2	0	0.52	0.51	0.48	0.44	0.39	0.32	0.24	0.17	0.09	0.07
80	3	0	0.52	0.51	0.46	0.42	0.36	0.3	0.23	0.16	0.09	0.07
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

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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