Control valves

Safety valves

Table 1 - SV615 flow capacity for saturated steam in kilogrammes per hour (kg/h)

(calculated in accordance with EN ISO 4126:2004 at 5% overpressure)

Derated coefficient of discharge (Kdr) = 0.71

Valve size DN in/out

15/20

20/32

25/40

32/50

40/65

50/80

Flow area (mm

2

)

113

314

452

661

1 075

1 662

Set pressure (bar g) Flow capacity for dry saturated steam kg/h

0.5

71

198

285 417 678 1 049

1.0 95

263 379 554 901 1 393

1.5

118

328

472 690 1 122 1 734

2.0 141

392 564 824 1 341 2 073

2.5

164

455

655 959 1 559 2 410

3.0

187

519

747 1 092 1 776 2 746

3.5 209

582 838 1 225 1 993 3 081

4.0 232

645 929 1 358 2 008 3 414

4.5

255

708

1 019 1 490 2 424 3 747

5.0

277

771

1 109 1 622 2 638 4 079

5.5 300

833 1 199 1 754 2 853 4 410

6.0

322

896

1 289 1 886 3 067 4 741

6.5 345

958 1 379 2 017 3 280 5 071

7.0

367

1020

1 469 2 148 3 494 5 401

7.5

390

1083

1 559 2 279 3 707 5 731

8.0 412

1145 1 648 2 410 3 920 6 060

8.5

434

1 207

1 737 2 541 4 132 6 389

9.0

457

1 269

1 827 2 672 4 345 6 717

9.5 479

1 331 1 916 2 802 4 557 7 046

10.0 501

1 393 2 005 2 933 4 769 7 374

11.0

546

1 517

2 184 3 194 5 194 8 030

12.0 591

1 641 2 362 3 454 5 618 8 685

13.0

635

1 765

2 540 3 715 6 042 9 340

14.0

680

1 888

2 718 3 975 - -

15.0 724

2 012 2 897 4 236 - -

16.0

769

2 136

3 075 4 496 - -

17.0 813

2 260 3 253 4 757 - -

18.0

858

2 384

3 431 5 018 - -

Table 2 - SV615 flow capacity for air in litres per second (normal I/s) at 0°C and 1.013 bar a

(calculated in accordance with EN ISO 4126:2004 at 10% overpressure)

Derated coefficient of discharge (Kdr) = 0.71

Valve size DN in/out

15/20

20/32

25/40

32/50

40/65

50/80

Flow area (mm

2

)

113

314

452

661

1 075

1 662

Set pressure (bar g)

Flow capacity for air I/s

0.5

24

67

97

142

230

356

1.0

33

91

131

191

311

481

1.5

41

115

165

241

392

606

2.0

50

138

199

291

473

732

3.0

67

186

267

391

635

982

4.0

84

233

335

490

797

1 233

5.0

101

280

403

590

959

1 483

6.0

118

328

472

690

1 121

1 734

7.0

135

375

540

789

1 283

1 984

8.0

152

422

608

889

1 446

2 235

9.0

169

470

676

988

1 608

2 485

10.0

186

517

744

1 088

1 770

2 736

11.0

203

564

812

1 188

1 932

2 986

12.0

220

612

880

1 287

2 094

3 237

13.0

237

659

948

1 387

2 256

3 487

14.0

254

706

1 017

1 487

2 418

3 738

16.0

288

801

1 153

1 686

-

-

18.0

322

896

1 289

1 885

-

-

TI-P316-01 CH Issue 16

SV615 Safety Valve

Page 3 of 5

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