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Straight version Duofit D20 for repairs on damaged pipes (cracks, faulty weldings, corrosion, etc.) with no service interruption on pipes of any diameter.

Can also be used for hot tapping techniques on pipes of any material and diameter with running fluids.

Central body
Carbon steel central body conveniently built in order to allow a perfect insertion of the gasket inside its dedicated conical seat.

Compression ring
Carbon steel compression followers which allow compression of the gasket onto the pipe surface upon tightening the bolts.

Gasket
Truncated-cone sealing gasket which can be perfectly inserted between the central body of the coupling and the circumference of the pipe. It allows a complete hydraulic seal and a 30 mm tolerance range on the pipe OD.

Bolt holes
Round or square holes for the bolt insertion.

Compression bolts
The compression bolts allow the approaching of the compression flanges and the consequent compression of the gasket onto the pipe.

Shaping
Manufactured in carbon steel, designed according to the length and the diameter of the pipe or of the sleeve to be repaired, in order to perfectly cover them.

Lateral plates
Manufactured in carbon steel, they allow the union of the two longitudinal shells of the DUOFIT allowing the repairing of the leak.

Lateral gasket
Lateral gasket with square section, it is compressed between the lateral plates and allows the hydraulic seal along the entire length of the Duofit.

Upper and lower outlets
They allow the DUOFIT assembly decreasing the pressure during the installation. They are also used in order to test the DUOFIT tightness once the installation is completed.

Straight version
Straight version for repairing pipeline straight sections.

Separate followers version
The bolts tightening is independent in order to improve the coupling centering and the performances of the gasket.

Duofit D20 Double Bolt Straight Version Technical Specifications

 

DN

Ø D

MOP (PN)

 

L1

Max. External Dimension Ø C

No. Flange Bolts N

No. Lateral Plates Bolts B

 

Weight

Min.

Max.

300

320

350

6-10-16

 

435

513

16

 

12

118

350

340

370

6-10-16

533

 

20

125

360

390

6-10-16

553

129

400

390

420

6-10-16

583

135

410

440

6-10-16

603

139

450

435

465

6-10-16

628

 

24

147

460

490

6-10-16

653

152

 

500

490

520

6-10-16

683

158

510

540

6-10-16

703

162

535

565

6-10-16

728

 

28

171

560

590

6-10-16

753

176

 

600

590

620

6-10-16

783

186

620

650

6-10-16

813

192

645

675

6-10-16

838

197

 

700

670

700

6-10-16

863

 

32

205

695

725

6-10-16

888

210

720

750

6-10-16

913

215

750

780

6-10-16

943

221

 

800

780

810

6-10-16

973

227

835

865

6-10-16

1028

 

36

241

860

890

6-10-16

1053

246

 

900

895

925

6-10-16

1088

257

925

955

6-10-16

1118

 

40

267

955

985

6-10-16

1148

273

 

1000

985

1015

6-10-16

1178

279

1000

1030

6-10-16

1193

 

44

285

1030

1060

6-10-16

1223

291

1060

1090

6-10-16

1253

297

 

1100

1080

1110

6-10-16

1273

301

1100

1130

6-10-16

1293

 

48

308

1130

1160

6-10-16

1323

314

1160

1190

6-10-16

1353

320

 

1200

1185

1215

6-10-16

1378

325

1205

1235

6-10-16

1398

52

333

1235

1265

6-10-16

1428

339

1300

1300

1330

6-10-16

1493

 

56

359

1335

1365

6-10-16

1528

366

 

1400

1385

1415

6-10-16

1578

376

1410

1440

6-10-16

1603

60

384

1440

1470

6-10-16

1633

390

1500

1510

1540

6-10-16

1703

64

407

 

1600

1585

1615

6-10-16

1778

 

68

422

1610

1640

6-10-16

1803

431

1650

1680

6-10-16

1843

439

1800

1825

1855

6-10-16

2018

80

488

1860

1890

6-10-16

2053

84

495

2000

2020

2050

6-10-16

2213

92

536

2065

2095

6-10-16

2258

96

545

  • This chart is for indicative purposes. Nova Siria srl can vary the indicated standards (tolerance range, dimensions and materials) according to specifications requested by Customers or to designing needs.
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