Cv-values: BWHH

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Series	Code	Description
BWH	BWHH_CS	NELES BWH-SERIES, METAL SEATED DOUBLE ECCENTRIC HIGH TEMP VALVE, CARBON STEEL, RATING ASME 1500 (BWH_H)

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Technical bulletin

The Type BWH_H 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 1500, PN250. Use Nelprof code BWH_H for Double Flanged, Wafer, Lug and Butt Weld End design sizing. For this valve also a 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
200	8	0	23	55	103	165	239	322	395	448	485	517
250	10	0	43	105	197	319	466	636	802	945	1054	1134
300	12	0	60	144	270	440	653	907	1182	1449	1670	1809
350	14	0	73	176	338	559	832	1147	1489	1855	2171	2372
400	16	0	88	213	417	700	1045	1430	1848	2342	2785	3069
450	18	0	105	252	479	808	1231	1717	2237	2769	3317	3651
500	20	0	125	301	579	982	1492	2071	2697	3364	4019	4384
600	24	0	192	464	886	1495	2260	3111	4047	5122	6089	6522

C_v/d²-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
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
500	20	0	0.088	0.124	0.159	0.197	0.24	0.284	0.322	0.352	0.378	0.4
600	24	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
200	8	0	0.86	0.86	0.85	0.85	0.83	0.82	0.81	0.8	0.79	0.78
250	10	0	0.86	0.86	0.85	0.84	0.82	0.8	0.78	0.77	0.76	0.76
300	12	0	0.86	0.86	0.85	0.84	0.82	0.8	0.78	0.77	0.75	0.75
350	14	0	0.86	0.86	0.85	0.84	0.83	0.81	0.79	0.77	0.76	0.75
400	16	0	0.86	0.86	0.85	0.84	0.83	0.81	0.79	0.77	0.76	0.75
450	18	0	0.86	0.86	0.86	0.85	0.83	0.82	0.8	0.78	0.76	0.76
500	20	0	0.86	0.86	0.86	0.85	0.83	0.82	0.8	0.78	0.77	0.76
600	24	0	0.86	0.86	0.86	0.85	0.83	0.81	0.8	0.77	0.76	0.76

X_T-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
200	8	0	0.53	0.53	0.53	0.53	0.53	0.52	0.52	0.51	0.51	0.5
250	10	0	0.53	0.53	0.53	0.53	0.53	0.52	0.5	0.48	0.46	0.45
300	12	0	0.53	0.53	0.53	0.53	0.53	0.52	0.5	0.47	0.45	0.44
350	14	0	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.48	0.46	0.44
400	16	0	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.49	0.46	0.44
450	18	0	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.49	0.47	0.45
500	20	0	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.5	0.47	0.46
600	24	0	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.49	0.46	0.45

z-values

SIZE			Relative opening h
DN	INCH	RN	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
RN = Reduction Number
200	8	0	0.38	0.38	0.36	0.33	0.3	0.29	0.28	0.27	0.27	0.26
250	10	0	0.38	0.38	0.35	0.32	0.29	0.28	0.26	0.25	0.25	0.24
300	12	0	0.38	0.38	0.35	0.32	0.29	0.28	0.26	0.25	0.24	0.24
350	14	0	0.38	0.38	0.36	0.32	0.3	0.28	0.27	0.25	0.25	0.24
400	16	0	0.38	0.38	0.36	0.33	0.3	0.28	0.27	0.26	0.25	0.24
450	18	0	0.38	0.38	0.36	0.33	0.3	0.29	0.27	0.26	0.25	0.24
500	20	0	0.38	0.38	0.36	0.33	0.3	0.29	0.27	0.26	0.25	0.25
600	24	0	0.38	0.38	0.36	0.33	0.3	0.28	0.27	0.26	0.25	0.24

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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