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Home / Products / Butterfly Valves / Lug Type Butterfly Valves / Ductile Iron Concentric Resilient Seated Butterfly Valve Wafer & Flanged Rubber Soft Seal Butterfly Valve for Water Supply

Ductile Iron Concentric Resilient Seated Butterfly Valve Wafer & Flanged Rubber Soft Seal Butterfly Valve for Water Supply

The SD42X Type Telescopic Soft-sealed Butterfly Valve is another new product developed by our
factory following flange butterfly valves and expansion joints. It features an innovative integrated
structure combining a flange butterfly valve and an expansion joint, and has won high trust from
users with its excellent performance.
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Product Description

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Usage Scenarios

Widely used in water supply and drainage as well as gas pipelines in industries such as food,

pharmaceuticals, chemicals, petroleum and power, textiles, and papermaking, it serves to

regulate flow and shut off media, and also has the function of compensating for thermal

expansion and contraction of pipelines.

Features

1.This valve adopts a double-eccentric structure, featuring a sealing function thattightens progressively as it closes, with reliable sealing performance.

2.The sealing pair is made of a combination of stainless steel and nitrile oil-resistantrubber, ensuring a long service life.

3.The rubber sealing ring can be installed either on the valve body or the butterflydisc, making it suitable for media with different characteristics and available for user

selection.

4.The butterfly disc adopts a frame structure, boasting high strength, large flow areaand low flow resistance.

5.The overall epoxy resin coating effectively prevents corrosion, and the valve can beapplied to different media simply by replacing the sealing material of the valve seat.

6.This valve has a bidirectional sealing function. Its installation is not restricted by themedium flow direction or spatial position, and it can be installed in any orientation.

7.This valve features a unique structure, with flexible, labor-saving and convenientoperation.

Technical Parameters

1.Flanged connection shall comply with the standards GB/T 17241.1-2024 andGB/T 9124.1-2019.

2.Strength and sealing tests shall comply with the standard GB/T 13927-2022.

3.Relevant technical parameters are listed in Table 1, materials of main compo

nents in Table 2, overall dimensions in Table 3, and product types in Table 4.

Table 1:Technical Parameters Table

PN

1.0MPa

1.6MPa

2.5MPa

Body Test

1.5MPa

2.4MPa

3.75MPa

Seal Test

1.1MPa

1.76MPa

2.75MPa

Temperature

0℃~80℃

Actuation Method

Worm gear,pneumatic,hydraulic,electric,etc.

Multiple Models Available

D342X、D642X、D742X、D942X,etc

Table 2:Main Component Materials

Part Name

Materials

Body,Disc,York

Ductile Iron/Cast Steel

Plate,Gland,Cover

Ductile Iron/Cast Steel

Seat Sealing Surface

Copper Alloy/Stainless Steel

Sealing Ring

NBR/EPDM

Stem

Stainless Steel

Fasteners

Carbon Steel/Stainless Steel

DN

φD

φK

N-Φ

L

H1

H2

PN10

PN16

PN25

PN10

PN16

PN25

PN10

PN16

PN25

100

220

235

180

190

8-φ19(18)

8-φ23(22)

127±2

110

160

150

285

300

240

250

8-φ23(22)

8-Q28(26)

140±2

145

200

200

340

360

295

310

8-φ23(22)

12-φ23(22)

12-Q28(26)

152±2

170

290

250

395

405

425

350

355

370

12-φ23(22)

12-Q28/26)

12-Q31(30)

165±2

235

330

300

445

460

485

400

410

430

12-φ23(22)

12-Φ28(26)

16-Q31(30)

178±3

255

355

350

505

520

555

460

470

490

16-φ23(22)

16-φ28(26)

16-034(33)

190±3

290

380

400

565

580

620

515

525

550

16-φ28(26)

16-031(30)

16-Φ37(36)

216±3

335

435

450

615

640

670

565

585

600

20-Φ28(26)

20-Q31(30)

20-Q37(36)

222±3

360

465

500

670

715

730

620

650

660

20-φ28(26)

20-034(33)

20-037(36)

229±3

410

510

600

780

840

845

725

770

770

20-031(30)

20-Q37(36)

20-41(39)

267±4

475

650

700

895

910

960

840

840

875

24-Φ31(30)

24-Q37(36)

24-Q44(42)

292±4

525

680

800

1015

1025

1085

950

950

990

24-Φ34(33)

24-Q41(39)

24-Q50(48)

318±4

595

750

900

1115

1125

1185

1050

1050

1090

28-φ34(33)

28-Q41(39)

28-Q50(48)

330±5

640

805

1000

1230

1255

1320

1160

1170

1210

28-φ37(36)

28-Q44(42)

28-057(56)

410±5

695

880

1200

1455

1485

1530

1380

1390

1420

32-Φ41(39)

32-Q50(48)

32-457(56)

470±6

815

990

1400

1675

1685

1755

1590

1590

1640

36-44(42)

36-Q50(48)

36-462

530±6

960

1155

1600

1915

1930

1975

1820

1820

1860

40-φ50(48)

40-①57(56)

40-Q62

600±6

1060

1305

1800

2115

2130

2195

2020

2020

2070

44-Φ50(48)

44-Q57(56)

44-φ70

670±8

1195

1450

2000

2325

2345

2425

2230

2230

2300

48-Φ50(48)

48-62

48-70

760±8

1320

1650

2200

2550

2555

2640

2440

2440

2510

52-Q56

52-Q62

52-70

800±8

1495

1765

2400

2760

2765

2850

2650

2650

2720

56-956

56-62

56-φ70

850±10

1590

1870

2600

2960

2965

-

2850

2850

-

60-φ56

60-62

-

900±10

1760

2030

2800

3180

3210

3070

3100

-

64-φ56

64-Φ62

-

950±10

1865

2170

3000

3405

3450

-

3290

3330

-

68-462

68-φ70

-

1000±10

1952

2235

3200

3610

3650

3495

3530

72-Φ62

72-φ70

1100±10

2250

2562

3400

3815

3850

-

3700

3730

-

76-Φ62

76-φ70

-

1200±10

2333

2666

3600

4020

4050

-

3905

3930

-

80-462

80-φ70

-

1200±10

2538

2827

3800

4260

-

-

4130

-

84-φ70

-

-

1200±10

2750

3030

4000

4460

-

4330

-

88-φ70

1300±10

2940

3220

Precision Valve Manufacturing

Professional Valve Manufacturer | Integrated Manufacturing

Raw Material

We select high-quality raw materials according to product specifications and international standards. All incoming materials are carefully inspected to ensure chemical composition, mechanical properties and traceability.

Forging & Casting

Advanced forging and casting processes are used to produce strong and reliable valve bodies and components. Strict process control ensures uniform structure, dimensional accuracy and excellent mechanical performance.

CNC Machining

Our CNC machining equipment provides precise and consistent processing of valve components. Critical dimensions, threads and sealing surfaces are strictly controlled to ensure accurate assembly and reliable sealing performance.

Shot Blasting & Coating

Valve surfaces are professionally shot blasted to remove rust, scale and impurities. Protective coatings are then applied according to customer requirements, providing excellent corrosion resistance and a durable surface finish.

Pressure Testing

Every valve undergoes strict pressure testing before shipment. Body and seat tests are performed according to applicable standards and customer specifications to verify pressure resistance and sealing reliability.

Quality Inspection

Our quality control team conducts comprehensive inspections throughout the production process. Finished valves are checked for dimensions, appearance, materials, pressure performance and overall quality before final approval and shipment.

For more products, please contact us

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Email: Eileenye@huhang.cn / tina@huhang.cn
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