Cv-values: BWIG

Back to index

Series	Code	Description
BWH	BWIG_CS	NELES BWH-SERIES, METAL SEATED DOUBLE ECCENTRIC HIGH TEMP VALVE, CARBON STEEL, BODY RATING ASME 2500 TRIM RATING ASME 900 (BWH_I/G)

Links:

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	5	24	42	62	87	113	146	180	204	211
200	8	0	11	51	94	142	199	265	351	440	504	527
250	10	0	22	93	175	270	393	546	709	890	1044	1121
300	12	0	31	113	227	388	596	825	1065	1362	1648	1821
350	14	0	60	162	325	566	877	1221	1581	2024	2421	2628
400	16	0	98	212	423	751	1173	1642	2133	2735	3233	3450
450	18	0	122	256	544	985	1527	2129	2814	3593	4138	4398

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	0.84	0.83	0.82	0.81	0.81
200	8	0	0.86	0.86	0.86	0.85	0.84	0.83	0.81	0.8	0.78	0.78
250	10	0	0.86	0.86	0.85	0.84	0.83	0.81	0.79	0.77	0.76	0.76
300	12	0	0.86	0.86	0.85	0.84	0.83	0.81	0.79	0.77	0.76	0.75
350	14	0	0.86	0.86	0.85	0.84	0.82	0.81	0.78	0.76	0.75	0.74
400	16	0	0.86	0.86	0.85	0.84	0.82	0.8	0.78	0.76	0.75	0.74
450	18	0	0.86	0.86	0.85	0.84	0.82	0.8	0.78	0.76	0.74	0.74

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	0.52	0.52
200	8	0	0.53	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.5	0.5
250	10	0	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.49	0.47	0.45
300	12	0	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.48	0.45	0.43
350	14	0	0.53	0.53	0.53	0.53	0.53	0.52	0.5	0.47	0.44	0.43
400	16	0	0.53	0.53	0.53	0.53	0.53	0.52	0.5	0.46	0.44	0.43
450	18	0	0.53	0.53	0.53	0.53	0.53	0.51	0.49	0.46	0.43	0.43

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	0.36	0.34	0.32	0.3	0.29	0.28	0.28
200	8	0	0.38	0.38	0.36	0.34	0.32	0.3	0.28	0.27	0.26	0.26
250	10	0	0.38	0.38	0.35	0.33	0.3	0.28	0.27	0.26	0.25	0.24
300	12	0	0.38	0.38	0.36	0.33	0.3	0.28	0.27	0.25	0.24	0.24
350	14	0	0.38	0.38	0.36	0.32	0.29	0.28	0.26	0.25	0.24	0.23
400	16	0	0.38	0.38	0.36	0.32	0.29	0.28	0.26	0.25	0.24	0.23
450	18	0	0.38	0.38	0.36	0.32	0.29	0.27	0.26	0.25	0.24	0.23

Back to index

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