Butterfly Valve Series 30/31, DN 50 ... DN 500

Дисковый  затвор Bray 30/31

Bray® Controls is proud to offer a high quality line of butterfly valves to meet the requirements of today’s market. Combining years of field application experience, research and development, Bray has designed many unique features in the Series 30/31 not previously available. The results are longer service life, greater reliability, ease of parts replacement and interchangeability of components.

Specifications

Version: Series 30 - wafer
Series 31 - lug
Diameter nominal-metric DN, mm: 50…500
Pressure nominal PN, Bar: 10/16/25
Max pressure: 16 Bar for DN50…DN300
12 Bar for DN350…DN500
16 Bar for DN50…DN300 (Series 31H)
25 Bar for DN50…DN300 (Series 31U)
Velocity limits: fluids: 9 m/s
gases: 54 m/s
Body material*: GG25 Coated Grey Cast Iron
GGG40.3 Coated Ductile Iron
1.0446 Carbon Steel
AlSi7Mg Aluminium
Disk: Nylon11 coated GGG40 Ductile Iron
Halar coated GGG40 Ductile Iron
1.4408 Stainless Steel
ASTM B148-954 Aluminium Bronze
Stem: 1.4401 Stainless Steel
1.4301 Stainless Steel
1.4005 Stainless Steel
Monel K500
Seat: EPDM (-40...+121 C)
Bonded EPDM (-40...+121 C)
Buna-N (NBR) (-18...+100 C)
Bonded Buna-N (NBR) (-18...+100 C)
FKM (Viton) (-18...+204 C)
Actuator: handle / gear operator / pneumatic actuator /electric actuator
Accessories: SS actuator / positioners / solenoid valves

*other materials are available upon request

Datasheet

Butterfly Valve Bray S30

POLYESTER COATING CORROSION PROTECTION
Bray’s S30 standard product offers valve bodies with a polyester coating, providing excellent corrosion and wear resistance to the valve’s surface. The Bray polyester coating is a hard, gloss red finish.
Chemical Resistance – resists a broad range of chemicals including: dilute aqueous acids and alkalies, petroleum solvents, alcohols, greases and oils. Offers outstanding resistance to humidity
and water. Weatherability– outdoor tested resistant to ultra-violet radiation. Abrasion Resistance – excellent resistance to abrasion. Impact Resistance –withstands impact without chipping or cracking.

FEATURES
• Unique “tongue and groove” seat design, bonded to the body by aerospace adhesive, is designed to seal with slip-on or weld-neck flanges. Seat totally encases the valve interior to isolate the line media from the body.
• Molded seat O-ring provides seal between valve and pipe flanges. Flange gaskets should not be used with this valve.
• Primary and secondary seals are interference fits between seat and disc hub, and stem and seat stem hole respectively.
• Series 31H Lug valves are drilled and tapped to meet ANSI Class 125/150 and PN16 flanges.
• Valves are bidirectional and every valve is tested to 110% of full pressure rating.
• The unique close tolerance, double “D” connection drives the valve disc. This design eliminates the need for exposed stem retention components, such as disc screws, to the line media which commonly results in leak paths, corrosion, and vibration failures. Due to wear and corrosion, disc screws often require difficult machining for disassembly. Disassembly of the Bray stem is simply a matter of pulling the stem out of the disc.
• Disc edge sealing surface is spherically machined and hand polished to provide a bubble tight shut-off, with minimum torque and an extended seat cycle life.
• Patented “Spirolox®” retaining ring and stem retaining C-rings provide a blow-out proof stem.

EPDM -40 ... +l20°C
Buma-N -15 ...+100°C
Viton -40 ...+200°C
Nylon -29 ... + 95°C

DISC AND STEM CONNECTION (A)
Features a high-strength through stem design. The close tolerance, double “D” connection that drives the valve disc is an exclusive feature of the Bray valve. It eliminates stem retention components being exposed to the line media, such as disc screws and taper pins, which commonly result in leak paths, corrosion, and vibration failures. Disc screws or taper pins, due to wear and corrosion, often require difficult machining for disassembly. Disassembly of the Bray stem is just a matter of pulling the stem out of the
disc. Without fasteners obstructing the line flow, the Series 30/31 Cv values are higher than many other valves, turbulence is reduced, and pressure recovery is increased. The stem ends and top mounting flange are standardized for interchangeability with Bray actuators.

DISC (B)
Casting is spherically machined and hand polished to provide a bubbletight
shut off, minimum torque, and longer seat life. The disc O.D. clearance is designed to work with all standard piping.

 

 

Кольцо C - Фиксатор вала

STEM RETAINING ASSEMBLY (C)
The stem is retained in the body by means of a unique Stainless Steel “Spirolox®” retaining ring, a thrust washer and two C-rings, manufactured from brass as standard, stainless steel upon request. The retaining ring may be easily removed with a standard hand tool. The stem retaining assembly prevents unintentional removal of the stem during field service.

 

STEM SEAL (E)
Double “U” cup seal design is self-adjusting and gives positive sealing in both directions. Prevents external substances from entering the stem bore.


NECK (F)
Extended neck length allows for 2" of piping insulation and is easily accessible for mounting actuators.

PRIMARY AND SECONDARY SEALS (G)
The Primary Seal is achieved by an interference fit of the moulded seat flat with the disc hub. The Secondary Seal is created because the stem diameter is greater than the diameter of the seat stem hole. These seals prevent line media from coming in contact with the stem or body.

(I) Disk seal

FLANGE LOCATING HOLES (K)
Provide quick and proper alignment during installation.

BODY (L) One-piece wafer or lug style. Polyester coating for excellent corrosion resistance. Bray valve bodies meet 12 bar pressure ratings for hydrostatic test requirements.

DESIGN FEATURES
Bray’s Series 30 valve is a wafer version with flange locating holes, and the Series 31 is the companion lug version for dead-end service and other flange requirements. All Bray valves are tested to 110% of full pressure rating before shipment. A major design  advantage of Bray valve product lines is international compatibility. The same valve is compatible with most world flange standards - BS EN 1092-1, PN 10/16, DIN ND, ANSI125/150, BS10 Table D/E, AS 2129. In addition the valves are designed to comply with ISO 5752 face-to-face and ISO 5211 actuator mounting flanges. Therefore, one valve design can be used in many different world markets. Due to a modular concept of design, all Bray® handles, manual gear operators and pneumatic and electric actuators mount directly to Bray valves. No brackets or adapters are required.

Nylon 11

NYLON 11 COATING
Optionally available for valve bodies where outstanding protection and performance is needed. A thermoplastic produced from a vegetable base, this
coating is inert to fungus growth and molds. Nylon 11 is USDA Approved, as well as certified to ANSI /NSF 61 for water service. Corrosion Resistance – superior resistance to a broad range of chemical environments. Salt spray tested in excess of 2,000 hours and seawater immersion tested for over 10 years without corrosion to metal substrates. Nylon 11 features a very low coefficient of friction and excellent resistance to impact and ultra-violet radiation.

Dimensions


       Series 30                                                                            Series 31

 

      DN

 

 

А

 

B

 

C

 

D

 

E

 

F

 

Mounting Flange Drig.

 

G

 

H

 

J

 

K

 

L

Lug Bolting Data*

mm

ins

1+

2+

3+

1+

2+

3+

50

2

94

43

51

72

140

90

70

4

9.5

14

10

32

33

51

125

4

M16

65

21?2

106

46

64

85

152

90

70

4

9.5

14

10

32

49

59

145

4

M16

80

3

124

46

76

102

159

90

70

4

9.5

14

10

32

65

67

160

8

M16

100

4

154

52

102

131

178

90

70

4

9.5

16

11

32

91

87

180

8

M16

125

5

181

56

127

156

190

90

70

4

9.5

19

13

32

118

107

210

8

M16

150

6

206

56

146

178

203

90

70

4

9.5

19

13

32

138

120

240

8

M20

200

8

267

60

197

241

241

150

125

4

14

22

16

32

189

153

295

12

M20

250

10

324

68

248

291

273

150

125

4

14

30

22

50

242

188

350

12

M20

300

12

378

78

298

342

311

150

125

4

14

30

22

50

291

213

400

12

M20

DN

 

А

 

B

 

C

 

D

 

E

 

F

Mounting Flange Drig.

 

G

 

J

 

KEY
SIZE

 

K

 

L

Lug Bolting Data*

mm

ins

1+

2+

3+

1+

2+

3+

350

14

430

78

337

388

346

150

125

4

14

35

51

10?10

331

238

460

16

M20

400

16

484

102

387

442

375

150

125

4

14

35

51

10?10

377

273

515

16

M24

450

18

537

108

438

495

406

210

165

4

21

50

64

10?12

428

305

565

20

M24

500

20

591

127

489

548

438

210

165

4

21

50

64

10?12

475

348

620

20

M24


Actuator Mounting Flange ISO recess dimensions.

Specifications 

Lug Bolting Data*

50mm – 150mm F07
200mm – 400mm F12
450mm – 500mm F16

Diameter(mm) 50-300
Pressure (Bar)
10 Bar (body GG25)
16 Bar (body GGG40)

†1. Окружность центров отверстий
†2.Количество отверстий
†3.Диаметр отверстий
†4. Размеры болтов

EXPECTED SEATING/UNSEATING TORQUES (Nm)

 

Diameter

 

 

А

 

 

    B

 

 

 C

 

?Р (Bar)

?Р (Bar)

?Р (Bar)

mm

ins

0

3.5

7

10

12

0

3.5

7

10

12

0

3.5

7

10

12

50

2

12

13

13

14

14

14

14

15

15

16

17

17

18

19

20

65

21?2

19

20

21

22

23

21

22

23

24

25

26

28

29

30

31

80

3

25

27

28

30

31

28

29

31

33

34

35

37

39

41

42

100

4

39

41

44

46

48

42

45

48

51

53

53

58

60

64

66

125

5

58

63

69

75

78

63

69

76

82

85

79

87

95

102

107

150

6

74

83

94

103

107

79

91

103

113

118

98

114

129

141

148

200

8

134

152

170

188

197

147

167

186

206

216

184

208

233

258

271

250

10

213

230

259

288

298

221

253

285

316

332

277

316

356

396

415

300

12

305

351

398

444

467

336

386

437

488

514

419

483

547

610

642

350

14

431

509

586

663

-

475

559

644

729

-

593

699

805

911

-

400

16

524

658

791

925

-

576

723

870

1017

-

720

904

1088

1271

-

450

18

606

812

1017

1223

-

667

893

1119

1345

-

833

1116

1398

1681

-

500

20

791

1058

1325

1592

-

870

1164

1458

1752

-

1088

1455

1822

2189

-

PRESSURE RATINGS*
For bi-directional bubble-tight shut off, disc in closed position:

mm

ins

Bar

Psig

50-300

2-12

12

175

350-500

14-20

10

150

 

DIN 3230 BO 
flanged

mm

ins

Bar

Psig

50-300

2-12

10

150

VELOCITY LIMITS
For On/Off Services:
Fluids – 9m/s 
Gases – 54m/s  

Cv VALUES–VALVE SIZING COEFFICIENT

Valve size

Disc Position (degrees)

mm

ins

90°

80°

70°

60°

50°

40°

30°

20°

10°

50

2

124

98

72

53

37

23

14

6

9

65

2?

243

192

140

92

58

37

21

10

1.3

80

3

397

813

230

132

83

53

30

13

1.7

100

4

723

603

427

236

147

94

53

23

2.6

125

5

1083

986

667

368

231

146

84

37

4.3

150

6

1591

1326

882

488

304

194

111

48

5.2

200

8

2852

2444

1601

876

585

362

207

88

10.3

250

10

4670

3892

2535

1471

925

574

329

139

16.3

300

12

6946

5789

3778

2204

1371

864

477

202

23.2

350

14

9063

7632

5108

2910

1848

1135

650

257

29.2

400

16

12044

10115

6766

3855

2448

1504

861

341

38.7

450

18

14804

12467

8656

4933

3133

1924

1102

436

49.9

500

20

19212

16178

10780

6144

3901

2326

1372

544

61.9

Cv is defined as the volume of water in U.S.G.P.M. that will flow through a given restriction or valve opening with a pressure drop of one (1) p.s.i. at room temperature. Recommended control angles are between 25°–70° open. Preferred angle for control valve sizing is 60°–65° open.


COMPONENTS

Description

Код материала

1

Body
DN 50-500

GG25 Cast Iron
GGG40 Ductile Iron
GS-C25 Steel

0.6025
0.7040
1.0619

2

Seat
DN 50-500

EPDM
Buna
Viton

EPDM
NBR
FKM

3

Disc

GGG40 Ductile Iron
Нейлоновое покрытие
CrNiMo-Steel
Aluminium Bronze

0.7040
Nylon
1.4408
2.0975.01

4

Stem
DN 50-500

CrNiMo-Steel
Monel

1.4401
Monel K500

5

Stem Seal

Усиленная Buna- N

NBR

6

Stem Bushing

Полиацеталь

POM

7

Stem Retainer

CrNiMo-Steel

8

Thrust Washer

Оцинкованная пружинная
сталь

ASSEMBLY

Position the disc in the partially open position, maintaining the disc within the body face-toface. Place the body between the flanges and install flange bolts. Do not use flange gaskets. Before tightening flange bolts, carefully open the disc to the full open position to ensure proper alignment and clearance of the disc O.D. with the adjacent pipe I.D. Leave disc in the full open position and tighten flange bolts per required specification. Once bolts are tightened, carefully rotate disc to closed position to ensure disc O.D. clearance.

Disc in the Partially Open Position

            

Disc in the Full Open Position

                   

Disc in the Near Closed Position

                            

Technical Information*