Cv-values: BWIH

Series	Code	Description
BWH	BWIH_CS	NELES BWH-SERIES, METAL SEATED DOUBLE ECCENTRIC HIGH TEMP VALVE, CARBON STEEL, BODY RATING ASME 2500 TRIM RATING ASME 1500 (BWH_I/H)

Series

Code

Description

BWH

BWIH_CS

NELES BWH-SERIES, METAL SEATED DOUBLE ECCENTRIC HIGH TEMP VALVE, CARBON STEEL, BODY RATING ASME 2500 TRIM RATING ASME 1500 (BWH_I/H)

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
RN = Reduction Number
200	8	0	8	34	69	110	156	205	259	310	352	377
250	10	0	14	60	126	207	298	398	505	617	721	791
300	12	0	20	80	175	298	437	592	759	947	1138	1280
350	14	0	38	118	243	410	610	837	1073	1337	1599	1785
400	16	0	60	157	306	514	777	1080	1385	1721	2051	2272
450	18	0	71	189	372	627	948	1311	1679	2092	2500	2762

SIZE

Relative opening h

INCH

10 %

20 %

30 %

40 %

50 %

60 %

70 %

80 %

90 %

100 %

RN = Reduction Number

200

110

156

205

259

310

352

377

250

126

207

298

398

505

617

721

791

300

175

298

437

592

759

947

1138

1280

350

118

243

410

610

837

1073

1337

1599

1785

400

157

306

514

777

1080

1385

1721

2051

2272

450

189

372

627

948

1311

1679

2092

2500

2762

C_v/d²-values

SIZE	Relative opening h
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

SIZE

Relative opening h

INCH

10 %

20 %

30 %

40 %

50 %

60 %

70 %

80 %

90 %

100 %

RN = Reduction Number

200

0.088

0.124

0.161

0.198

0.239

0.282

0.32

0.35

0.377

0.398

250

0.088

0.124

0.161

0.199

0.24

0.284

0.32

0.349

0.375

0.396

300

0.1

0.133

0.168

0.204

0.245

0.288

0.322

0.35

0.376

0.396

350

0.088

0.124

0.159

0.197

0.24

0.284

0.322

0.352

0.378

0.4

400

0.088

0.124

0.159

0.197

0.24

0.284

0.322

0.352

0.378

0.4

450

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
RN = Reduction Number
200	8	0	0.86	0.86	0.86	0.85	0.85	0.84	0.83	0.82	0.81	0.81
250	10	0	0.86	0.86	0.86	0.85	0.84	0.83	0.82	0.81	0.79	0.78
300	12	0	0.86	0.86	0.86	0.85	0.84	0.83	0.82	0.8	0.78	0.77
350	14	0	0.86	0.86	0.86	0.85	0.84	0.83	0.81	0.8	0.78	0.77
400	16	0	0.86	0.86	0.86	0.85	0.84	0.83	0.81	0.8	0.78	0.77
450	18	0	0.86	0.86	0.86	0.85	0.84	0.83	0.82	0.8	0.79	0.78

SIZE

Relative opening h

INCH

10 %

20 %

30 %

40 %

50 %

60 %

70 %

80 %

90 %

100 %

RN = Reduction Number

200

0.86

0.85

0.84

0.83

0.82

0.81

250

0.86

0.85

0.84

0.83

0.82

0.81

0.79

0.78

300

0.86

0.85

0.84

0.83

0.82

0.8

0.78

0.77

350

0.86

0.85

0.84

0.83

0.81

0.8

0.78

0.77

400

0.86

0.85

0.84

0.83

0.81

0.8

0.78

0.77

450

0.86

0.85

0.84

0.83

0.82

0.8

0.79

0.78

X_T-values

SIZE	Relative opening h
RN = Reduction Number
200	8	0	0.53	0.53	0.53	0.53	0.53	0.53	0.53	0.53	0.52	0.52
250	10	0	0.53	0.53	0.53	0.53	0.53	0.53	0.52	0.52	0.51	0.5
300	12	0	0.53	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.5	0.49
350	14	0	0.53	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.5	0.49
400	16	0	0.53	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.5	0.49
450	18	0	0.53	0.53	0.53	0.53	0.53	0.53	0.52	0.51	0.5	0.5

SIZE

Relative opening h

INCH

10 %

20 %

30 %

40 %

50 %

60 %

70 %

80 %

90 %

100 %

RN = Reduction Number

200

0.53

0.52

250

0.53

0.52

0.51

0.5

300

0.53

0.52

0.51

0.5

0.49

350

0.53

0.52

0.51

0.5

0.49

400

0.53

0.52

0.51

0.5

0.49

450

0.53

0.52

0.51

0.5

z-values

SIZE	Relative opening h
RN = Reduction Number
200	8	0	0.38	0.38	0.38	0.36	0.33	0.32	0.3	0.29	0.28	0.28
250	10	0	0.38	0.38	0.37	0.34	0.32	0.3	0.29	0.28	0.27	0.26
300	12	0	0.38	0.38	0.37	0.34	0.32	0.3	0.29	0.27	0.26	0.26
350	14	0	0.38	0.38	0.37	0.34	0.32	0.3	0.28	0.27	0.26	0.26
400	16	0	0.38	0.38	0.37	0.35	0.32	0.3	0.28	0.27	0.26	0.26
450	18	0	0.38	0.38	0.37	0.35	0.32	0.3	0.29	0.27	0.26	0.26

SIZE

Relative opening h

INCH

10 %

20 %

30 %

40 %

50 %

60 %

70 %

80 %

90 %

100 %

RN = Reduction Number

200

0.38

0.36

0.33

0.32

0.3

0.29

0.28

250

0.38

0.37

0.34

0.32

0.3

0.29

0.28

0.27

0.26

300

0.38

0.37

0.34

0.32

0.3

0.29

0.27

0.26

350

0.38

0.37

0.34

0.32

0.3

0.28

0.27

0.26

400

0.38

0.37

0.35

0.32

0.3

0.28

0.27

0.26

450

0.38

0.37

0.35

0.32

0.3

0.29

0.27

0.26

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