Trusted Flanged Butterfly Valve Manufacturer

NTVAL provides durable Flanged Butterfly Valves designed for reliable performance in tough environments. Engineered for smooth operation and long-lasting service, our precision-manufactured valves meet high industry standards, making them ideal for large-scale projects.

Reliable Flanged Butterfly Valve

The Metal Seated Flanged Butterfly Valve with Pneumatic Actuator is built for high-performance flow control in tough industrial settings. It has a strong metal-to-metal seat, which makes it very durable and excellent at sealing, even in extreme conditions. The pneumatic actuator allows for precise, automated control, making this valve a great choice for important processes where reliability and efficiency are crucial.
Flanged Butterfly Valve 1

Quality Control

Flanged Butterfly Valve 2
The PMI test confirms the flanged butterfly valve’s material composition matches design standards, supporting consistent quality performance.
PMI Test
Flanged Butterfly Valve 3
The sealing test examines the valve’s closure, making certain it prevents leaks and maintains strong pressure control in different applications.
Sealing Test​
Flanged Butterfly Valve 4
The low emission test detects any possible leaks, reducing the risk of harmful gases or fluids escaping into the environment.
Low Emission Test​
Flanged Butterfly Valve 5
The impact test assesses the valve’s durability, allowing it to withstands sudden force or pressure changes without breaking.
Impact Test​
Flanged Butterfly Valve 6
The dimension inspection checks each component’s measurements, guaranteeing that all parts fit accurately for smooth operation.
Dimension Inspection​
Flanged Butterfly Valve 7
The painting thickness test verifies the coating’s thickness, protecting the valve from corrosion and prolonging its lifespan in harsh conditions.
Painting Thickness Test​
Flanged Butterfly Valve 8
PT, or penetrant testing, identifies tiny surface cracks or flaws, highlighting areas needing repair for improved safety.
PT
Flanged Butterfly Valve 9
The material inspection assesses the raw materials’ quality, confirming they can handle the pressure and temperature required for safe valve operation.
Material Inspection​

Our Valve Applications in Key Industries

Discover how our advanced valve solutions improve flow control, delivering enhanced efficiency, safety, and strict quality assurance.
Flanged Butterfly Valve 10
Flanged butterfly valves handle corrosive chemicals effectively, offering precise flow control essential for safe chemical processing operations.
Chemical Processing
Flanged Butterfly Valve 11
In the petrochemical industry, these valves manage oil and gas flow under high pressure, maintaining stable operation in extreme temperature conditions.
Petrol Chemical
Flanged Butterfly Valve 12
Flanged butterfly valves perform well in nuclear and power generation settings, withstanding intense temperatures and high pressure for safe operation.
O.P.G & Nuclear
Flanged Butterfly Valve 13
These valves support the pulp industry by controlling thick fluids like slurry, offering reliable flow in heavy-duty processing environments.
Pulp
Flanged Butterfly Valve 14
Mining operations rely on flanged butterfly valves to handle abrasive materials, providing durable flow control in demanding conditions.
Mining
Flanged Butterfly Valve 15
In water and sewage systems, flanged butterfly valves offer dependable control over large fluid volumes, supporting continuous operations.
Water & Sewage
Flanged Butterfly Valve 16
Flanged butterfly valves regulate steam flow accurately, helping maintain consistent pressure and temperature within extensive steam distribution networks.
Steam System
Flanged Butterfly Valve 17
In boiling systems, these valves control hot water and steam flow, contributing to safe, efficient heat management in high-temperature settings.
Boiling System

Get More Versatile Valve

Main Features of the Product

Flanged Butterfly Valve 24
  • High Temperature and Pressure Resistance: The metal seat performs exceptionally well in extreme conditions, maintaining a tight seal even at high temperatures and pressures.
  • Durable Construction: Designed to handle abrasive materials, this valve is perfect for situations where soft-seated valves would fail.
  • Pneumatic Actuation: Equipped with a pneumatic actuator, this valve allows for quick, dependable, and remote operation, making it ideal for automated systems.
  • Zero Leakage: The metal-to-metal seal provides a tight shutoff with minimal leakage, meeting strict industrial standards.
  • Low Maintenance: Built for a long service life with minimal upkeep, this valve helps reduce downtime and operational costs.

Applications

The Metal Seated Flanged Butterfly Valve with Pneumatic Actuator is commonly used in a variety of industries, including:
 
  • Power Generation: Perfect for managing high-temperature steam and high-pressure applications.
  • Oil and Gas: Suitable for controlling the flow of crude oil, natural gas, and other hydrocarbons.
  • Petrochemical: Capable of handling aggressive chemicals, high temperatures, and abrasive materials.
  • Mining: Its sturdy design makes it ideal for handling slurry and abrasive media.
  • Water Treatment: Used in situations where strong sealing is needed, especially with corrosive or abrasive water.
  • Pulp and Paper, Steel Mills: Effective in processes involving high-temperature and high-pressure fluids, as well as abrasive materials.
  • Offshore Plants: Designed to withstand harsh marine environments, making it suitable for offshore oil and gas platforms.
  • Ship Building: Used in various ship systems where reliable flow control and durability are required.
Flanged Butterfly Valve 25

Technical Specifications

Materials
  • Body: Carbon Steel, Stainless Steel, or other alloys as per application needs.
  • Disc: Stainless Steel, Duplex Stainless Steel, or Inconel.
  • Seat: Hardened Stainless Steel, Stellite, or other hard-facing materials.
  • Shaft: 17-4PH Stainless Steel, Inconel, or other high-strength alloys.
  • Seals: Graphite, Metal O-ring, or other materials depending on the application.
Size and Dimensions
  • Size Range: DN50 to DN1200 (2″ to 48″).
  • Pressure Rating: ANSI Class 150, 300, 600.
  • Flange Connection: Compliant with ASME B16.5, EN1092-1, or other required standards.
  • Face-to-Face Dimension: According to ASME B16.10, API 609.
  • Temperature Range: -50°C to 200°C.
  • End Connections: Available in lug, wafer, and double-flange styles.
Standards
  • Design and Manufacturing: API 609, ISO 5752 standards.
  • Testing and Inspection: API 598, ISO 5208 standards.
  • Flange Standard: ASME B16.5, EN1092-1 specifications.
  • Pneumatic Actuator: ISO 5211, NAMUR standards.
  • Material Compliance: Meets NACE MR0175 for sour service environments.
  • Fire Safety: Certified to API 607 for fire-tested valves.
  • Environmental Standards: Complies with ISO 14001 for environmental management.

Dimensions

  • Type: Cast Steel Butterfly Valve
  • Connection: Double Flanged Ends with Metal Seating
  • Design Standard: Conforms to ASME B16.34
Flanged Butterfly Valve 26
SpecificationStandard
Face to FaceAPI 609 (Wafer)
End FlangeASME B16.5
Wafer EndsAPI 609/ MSS-SP-68 ISO 5752
ClassASME CL150~CL600
Flanged Butterfly Valve 27

CLASS 150 DIMENSIONS

 

FLANGE DIMENSION

       

MOUNTING BASE

SIZE
(in.)

L

D

g

C

t

h

a

n1

h1

H

H1

H2

D2

L1

TYPE

C1

n

h2

W.T(kg)
Unit:mm

3

114

191

127

152.4

19.1

5/8-11

15.8

4

19.1

282

258

142

200

165

F07

70

4

9

27

4

127

229

157.2

190.5

24

5/8-11

15.8

8

19.1

294

270

162

200

165

F07

70

4

9

35

5

140

254

185.7

215.9

24

3/4-10

19.1

8

22.2

319

295

170

200

165

F07

70

4

9

41

6

140

279

215.9

241.3

25.4

3/4-10

19.1

8

22.2

340

316

179

200

165

F07

70

4

9

45

8

152

343

269.7

298.4

28.5

3/4-10

19.1

8

22.2

384

344

208

300

270

F10

102

4

11

68

10

165

406

323.9

361.9

30.3

718-9

22.2

12

25.4

434

394

241

300

270

F10

102

4

11

97

12

178

483

381

431.8

31.8

718-9

22.2

12

25.4

520

470

267

400

335

F14

140

4

18

133

14

190

533

412.8

476.3

35.1

1-8

25.4

12

28.6

544

494

316

400

335

F14

140

4

18

188

16

216

597

469.9

539.7

36.6

1-8

25.4

16

28.6

643

578

349

500

375

F16

165

4

22

238

18

222

635

533.4

577.8

39.7

1-1/8-8

28.6

16

31.8

660

595

381

500

375

F16

165

4

22

302

20

229

699

584.2

635

43

1-1/8-8

28.6

20

31.8

695

630

412

500

375

F16

165

4

22

380

24

267

813

692.2

749.3

47.8

1-1/4-8

31.8

20

35.1

813

743

473

600

485

F25

254

8

18

599

CLASS 300 DIMENSIONS

 

FLANGE DIMENSION

       

MOUNTING BASE

SIZE
(in.)

L

D

g

C

t

h

a

n1

h1

H

H1

H2

D2

L1

TYPE

C1

n

h2

W.T(kg)
Unit:mm

3

114

210

127

168.2

28.5

3/4-10

19.1

8

22.2

282

258

142

200

165

F07

70

4

9

29

4

127

254

157.2

200

31.8

3/4-10

19.1

8

22.2

294

270

162

200

165

F07

70

4

9

39

5

140

279

185.7

234.9

35

3/4-10

19.1

8

22.2

319

295

170

300

270

F10

102

4

11

52

6

140

318

215.9

269.8

36

3/4-10

19.1

12

22.2

375

336

199

300

270

F10

102

4

11

63

8

152

381

269.7

330.2

41.2

7/8-9

22.2

12

25.4

450

400

227

400

335

F14

140

4

18

101

10

165

445

323.9

387.3

47.8

1-8

25.4

16

28.6

499

449

265

400

335

F14

140

4

18

176

12

178

521

381

450.8

50.8

1-1/8-8

28.6

16

31.8

562

497

302

500

375

F16

165

4

22

210

14

190

584

412.8

514.3

53.9

1-1/8-8

28.6

20

31.8

616

551

328

500

375

F16

165

4

22

315

16

216

648

469.9

571.5

57.2

1-1/4-8

31.8

20

35.1

676

606

367

600

485

F25

254

8

18

440

18

222

711

533.4

628.6

60.5

1-1/4-8

31.8

24

35.1

711

641

402

600

485

F25

254

8

18

558

20

229

775

584.2

685.8

63.5

1-1/4-8

31.8

24

35.1

798

721

432

700

520

F30

298

8

22

670

24

267

814

692.2

812.8

69.9

1-1/2-8

38.1

24

41.2

914

837

530

700

515

F30

298

8

22

1025

CLASS 300 DIMENSIONS

 

FLANGE DIMENSION

       

MOUNTING BASE

SIZE
(in.)

L

D

g

C

t

h

a

n1

h1

H

H1

H2

D2

L1

TYPE

C1

n

h2

W.T(kg)
Unit:mm

3

180

210

127

168.2

31.8

3/4-10

19.1

8

22.2

289

265

148

200

165

F07

70

4

9

37

4

190

273

157.2

215.9

38.1

7/8-9

22.2

8

25.4

370

330

180

300

270

F10

102

4

11

55

5

200

330

185.7

266.7

44.5

1-8

25.4

12

28.6

405

355

195

400

335

F14

140

4

18

86

6

210

356

215.9

292.1

47.8

1-8

25.4

12

28.6

420

370

225

400

335

F14

140

4

18

109

8

230

419

269.7

349.2

55.7

1-1/8-8

28.6

12

31.8

490

425

255

500

375

F16

165

4

22

192

10

250

508

323.9

431.8

63.5

1-1/4-8

31.8

16

35.1

545

480

310

500

375

F16

165

4

22

296

12

270

559

381

488.9

66.6

1-1/4-8

31.5

20

35.1

630

560

330

600

485

F25

254

8

0

390

Technical Data

PRESSURE/TEMPERATURE RATING (REF.ASME B16.34)

MAXIMUM WORKING PRESSURE,kgf/cxA

TEMPERATURE

CLASS 150

CLASS 300

CLASS 600

(i æ)

WCB

CF8M

WC9

WCB

CF8M

WC9

WCB

CF8M

WC9

-29to38

20

19.3

20.4

52

50.6

52.7

104.1

101.2

105.5

93

18.3

16.9

18.3

47.5

43.6

50.3

94.9

87.2

100.5

149

16.2

15.1

16.2

46.1

39.4

47.5

92.5

78.8

95.3

204

14.1

13.7

14.1

44.7

36.2

45.7

89.3

72.4

91.1

260

12

12

12

42.2

33.8

45

84.4

67.1

90

316

9.8

9.8

9.8

38.7

31.6

42.5

77

63.6

85.1

343

8.8

8.8

8.8

37.6

31.3

41.5

75.6

62.6

82.6

371

7.7

7.7

7.7

37.6

30.3

40.1

74.9

60.8

79.8

399

6.7

6.7

6.7

35.5

29.9

37.3

71

59.4

74.9

427

5.6

5.6

5.6

28.8

29.2

35.9

58

58.4

71.4

454

4.6

4.6

4.6

19

28.5

34.1

37.6

57

68.6

482

3.5

3.5

3.5

12

27.8

31.6

24.3

55.5

53.1

510

2.5

2.5

2.5

7.4

27.1

26.7

14.4

54.5

37.6

538

1.4

1.4

1.4

3.5

25.7

19

7.4

51

28.1

566

 

1.4(1)

1.4(1)

 

25.3

14.1

 

50.6

15.8

593

 

1.4(1)

1.4(1)

 

22.9

8.1

 

45.4

14.4

624

 

1.4(1)

1.4(1)

 

19.3

7.4

 

38.7

11

649

 

1.4(1)

1.4(1)

 

14.4

3.9

 

28.8

 

FLOW COEFFICIENT VALUE(Cv)

CLASS

3″

4″

5″

6″

8″

10″

12″

14″

16″

18″

20″

24″
Unit:mm

150#

195

345

500

827

1523

2698

4032

5674

7880

10594

13292

19604

300#

195

345

500

786

1447

2563

3830

5390

7486

10064

12627

18624

600#

195

345

475

746

1374

2435

3640

         

TORQUE DATA

MAX,P
(kdf/cm²)

3″

4″

5″

6″

8″

10″

12″

14″

16″

18″

20″


24″
Unit:mm

10.5(150PSIG)

2.8

4.9

6.8

11

19.3

29.8

51.2

61.7

86.5

143

181.8

272.5

20.0(285PSIG)

5.4

9.3

13

20.8

36.5

56.4

96.8

116.5

163.1

271

342.1

510.7

28.1(400PSIG)

7.6

13

18.2

29.1

52.3

81.5

134.2

169.3

236.8

386

495.1

735.1

42.2(600PSIG)

11.3

19.6

27.3

43.7

78.4

122.1

201

253.6

354.5

578

741

1098.9

52.0(740PSIG)

14

24.1

33.6

53.9

96.7

150.5

247.8

312.6

436.8

712.3

913.1

1353.5

104.1(1480PSIG)36.4

 

66.2

90.1

144.9

284.6

449.4

642.5

         

The torque shown in the above chart is actuator sizing torque at the maximum differential pressure.

Flanged Butterfly Valve 28

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Additional General Insights Here

Specs of Flanged Butterfly Valve

Dimension

Flanged Butterfly Valves are available in a range of sizes to suit different pipeline requirements. These valves typically come in sizes ranging from 2 inches to 48 inches, making them versatile for various applications. Choosing the correct dimension is crucial for achieving proper fit and effective flow control within the system. At NTVAL, we offers a wide selection of dimensions, helping clients find the perfect fit for effective flow control.

Temperature Rating

This valve is engineered to operate effectively across a wide temperature spectrum, typically handling temperatures from -20°C to 200°C. This capability allows it to perform reliably in both extreme cold and high-heat conditions. I find that this versatility makes it well-suited for a variety of demanding applications, where maintaining consistent performance under fluctuating temperatures is crucial.

Disc and Seat Material

The disc of this valve is commonly made from stainless steel or ductile iron, providing strong and reliable operation. The seat is often crafted from EPDM, PTFE, or rubber, which helps achieve a tight seal and prevents leakage. These materials are selected for their durability and compatibility with various fluids, providing long-lasting performance and minimal maintenance.

Features of Flanged Butterfly Valve

Compact Design

Flanged Butterfly Valves have a compact design, ideal for tight spaces in piping systems. This feature simplifies installation and maintenance, making them perfect for applications with limited space, without needing significant system modifications.

Bi-Directional Sealing

These valves feature bi-directional sealing, allowing them to provide a tight seal in both flow directions. This design guarantees that the valve can effectively prevent leaks and maintain system integrity, regardless of the direction in which the fluid is flowing.

Adjustable Stem Packing

Flanged Butterfly Valves include adjustable stem packing, allowing easy adjustments to prevent leakage around the stem. This feature contributes to the valve's long-term reliability by maintaining a tight seal and minimizing maintenance needs.

Benefits of Flanged Butterfly Valve

Reduced Pressure Loss

These valves help in reducing pressure loss within the system due to their streamlined design, which allows fluids to pass through with minimal resistance. This benefit is crucial in maintaining system efficiency and conserving energy in various industrial processes.

Improved Safety

Flanged Butterfly Valves improve safety in industrial operations. Their reliable sealing prevents leaks and maintains system integrity, reducing the risk of accidents or malfunctions in critical processes. For optimal performance and safety, choose NTVAL for your operations.

Easier Installation

These valves promote easier installation and maintenance due to their flanged connection and straightforward design. The simplicity of installing and servicing these valves minimizes downtime and labor costs, making them a practical option for various industrial applications.

Applications of Flanged Butterfly Valve

Chemical Processing

Flanged Butterfly Valves are commonly used in chemical processing plants, where they manage the flow of various chemicals and fluids. You won’t believe that their corrosion-resistant materials and reliable sealing capabilities make them suitable for handling aggressive substances, providing safe and efficient operation in processes like mixing, reaction, and transport.

Power Generation

In power generation plants, Flanged Butterfly Valves are used to regulate the flow of steam, water, and other fluids within boilers, cooling systems, and turbines. Their ability to handle high temperatures and pressures makes them a reliable choice for maintaining efficient and safe operations in power generation facilities.

Oil and Gas Pipelines

In the oil and gas industry, Flanged Butterfly Valves are used to control the flow of crude oil, natural gas, and other hydrocarbons within pipelines. Their ability to withstand high pressures and harsh conditions makes them ideal for upstream and downstream applications, providing efficient flow management across the entire pipeline system. If you are in this industry and looking for the best Flanged Butterfly Valve, consider NTVAL.

Water Distribution Systems

Flanged Butterfly Valves are essential in municipal and industrial water distribution systems, where they control the flow and pressure of wat across extensive pipelines. Their durable design and reliable sealing capabilities make them well-suited for managing large volumes of water, contributing to the efficient operation of distribution networks.
Flanged Butterfly Valve 29
Flanged Butterfly Valve 30

3 Considerations When Buying Flanged Butterfly Valve

01

Flanged End Connection Type

Confirm that the valve has a flanged end connection type to match your existing piping system. Wanna know why? For example, if your current setup uses flanged connections, choosing a valve with the same connection type simplifies installation and reduces the risk of leaks, making the process more efficient.

02

Low Emission Packing

Consider valves with low emission packing, especially if your application involves handling hazardous material or volatile substances. For example, if your system processes chemicals, low emission packing is crucial to minimize leakage, protecting both the environment and your personnel from potential harm.

03

1 Year Warranty Period

Choose a Flanged Butterfly Valve with at least a 1-year warranty. A warranty provides assurance that the manufacturer stands behind the product’s quality and protects against potential defects during initial use. At NTVAL, we offer an 18-month guarantee from the delivery date, ensuring confidence in your purchase and long-term reliability.

FAQS About Flanged Butterfly Valve

Yes, Flanged Butterfly Valves are suitable for high-pressure applications. Their flanged connection design provides a secure attachment for handling high-pressure environments effectively.
NTVAL provides technical assistance and troubleshooting for any issues that arise with the valves. Clients can also receive replacement parts or a new valve within the warranty period if needed.
These valves are certified under various international standards, including ISO9001, ISO14001, and ISO45001. These certifications verify that the valves comply with strict quality, environmental, and safety regulations.

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