Cv-values: BWIF

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Series	Code	Description
BWH	BWIF_CS	NELES BWH-SERIES, METAL SEATED DOUBLE ECCENTRIC HIGH TEMP VALVE, CARBON STEEL, BODY RATING ASME 2500 TRIM RATING ASME 600 (BWH_I/F)

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IMO

Technical bulletin

The Type BWH_I refers for high temperature. The values for the standard valve are based on single U-shape seat construction and for standard materials. The material as well as the seat selection has an effect on valve dimensions and Nelprof sizing due to strength calculations. The valve is designed for control and on/off purposes. Temperature range starts from 0 ... 600 °C, pressure rating ANSI class 2500, PN420. Use Nelprof code BWH_I for Double Flanged, Wafer, Lug and Butt Weld End design sizing. For this valve only derated trim option exists to increase flow capacity.

C_v-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
150	6	0	7	27	46	67	95	129	172	221	257	267
200	8	0	14	57	100	148	209	289	396	519	617	646
250	10	0	28	109	195	294	434	634	842	1089	1330	1467
300	12	0	40	125	236	411	664	947	1235	1601	2026	2371
350	14	0	76	176	336	602	975	1393	1832	2390	2973	3371
400	16	0	123	218	430	801	1298	1860	2466	3235	3959	4351
450	18	0	149	262	552	1043	1669	2374	3216	4104	4871	5409

C_v/d²-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
150	6	0	0.132	0.155	0.185	0.216	0.252	0.1	0.1	0.1	0.1	0.1
200	8	0	0.088	0.124	0.161	0.198	0.239	0.282	0.32	0.35	0.377	0.398
250	10	0	0.088	0.124	0.161	0.199	0.24	0.284	0.32	0.349	0.375	0.396
300	12	0	0.1	0.133	0.168	0.204	0.245	0.288	0.322	0.35	0.376	0.396
350	14	0	0.088	0.124	0.159	0.197	0.24	0.284	0.322	0.352	0.378	0.4
400	16	0	0.088	0.124	0.159	0.197	0.24	0.284	0.322	0.352	0.378	0.4
450	18	0	0.088	0.124	0.159	0.197	0.24	0.284	0.322	0.352	0.378	0.4

F_L-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
150	6	0	0.86	0.86	0.86	0.85	0.85	0.83	0.82	0.81	0.79	0.79
200	8	0	0.86	0.86	0.86	0.85	0.84	0.82	0.81	0.78	0.77	0.77
250	10	0	0.86	0.86	0.85	0.84	0.83	0.8	0.78	0.76	0.74	0.73
300	12	0	0.86	0.86	0.85	0.84	0.82	0.8	0.78	0.76	0.73	0.71
350	14	0	0.86	0.86	0.85	0.84	0.82	0.79	0.77	0.75	0.73	0.71
400	16	0	0.86	0.86	0.85	0.84	0.82	0.79	0.77	0.75	0.72	0.71
450	18	0	0.86	0.86	0.85	0.84	0.82	0.79	0.77	0.75	0.73	0.71

X_T-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
150	6	0	0.53	0.53	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.51
200	8	0	0.53	0.53	0.53	0.53	0.53	0.53	0.52	0.5	0.48	0.47
250	10	0	0.53	0.53	0.53	0.53	0.53	0.52	0.5	0.46	0.43	0.41
300	12	0	0.53	0.53	0.53	0.53	0.53	0.51	0.49	0.46	0.42	0.4
350	14	0	0.53	0.53	0.53	0.53	0.52	0.51	0.48	0.44	0.41	0.39
400	16	0	0.53	0.53	0.53	0.53	0.52	0.51	0.48	0.44	0.41	0.39
450	18	0	0.53	0.53	0.53	0.53	0.52	0.51	0.47	0.43	0.41	0.39

z-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
150	6	0	0.38	0.38	0.37	0.35	0.33	0.31	0.29	0.28	0.27	0.27
200	8	0	0.38	0.38	0.36	0.34	0.31	0.29	0.28	0.26	0.25	0.25
250	10	0	0.38	0.37	0.35	0.32	0.3	0.28	0.26	0.25	0.24	0.23
300	12	0	0.38	0.38	0.36	0.32	0.29	0.27	0.26	0.25	0.23	0.22
350	14	0	0.38	0.38	0.36	0.32	0.29	0.27	0.25	0.24	0.23	0.22
400	16	0	0.38	0.38	0.36	0.32	0.29	0.27	0.25	0.24	0.23	0.22
450	18	0	0.38	0.38	0.36	0.32	0.29	0.27	0.25	0.24	0.23	0.22

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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