Trusted Swing Check Valve Manufacturer

NTVAL offers durable Swing Check Valves for tough environments, ensuring long-lasting performance and optimal flow control. With easy installation and low maintenance, our valves provide exceptional value and reliability.

Reliable Swing Check Valve

Specifications

  • Bolted Cover
  • Size Range: NPS 2 to NPS 36
  • Pressure Range: 150LB to 2500LB
  • Design STD.: BS1868/ API6D
  • Swing Check Valve Manufacturer
Swing check valve is designed to stop the medium in the pipeline from flowing backward. When the pressure drops to zero, the valve closes completely to prevent backflow.
 
Swing check valves are part of the automatic valve group, mainly used in pipelines where the medium flows in one direction to prevent accidents. These valves have very low pressure drops and minimal turbulence. Although they are typically installed horizontally in the pipeline, they can also be installed vertically, as long as the disc doesn’t get stuck in the open position.
Swing Check Valve 1

Quality Control

Swing Check Valve 2
The PMI test checks that each Swing Check Valve uses the correct metals, providing strength and durability for secure fluid control.
PMI Test
Swing Check Valve 3
During the sealing test, we verify that the Swing Check Valve stops reverse flow, maintaining a leak-free environment within the system.
Sealing Test​
Swing Check Valve 4
The low emission test looks for leaks, helping the Swing Check Valve meet environmental standards by reducing any unintended emissions.
Low Emission Test​
Swing Check Valve 5
In the impact test, we measure the Swing Check Valve’s ability to handle sudden forces, ensuring it operates safely under pressure.
Impact Test​
Swing Check Valve 6
Dimension inspection confirms that each Swing Check Valve fits correctly in its designated space, supporting tight connections and reliable use.
Dimension Inspection​
Swing Check Valve 7
This test measures the paint coating on the valve, helping protect the Swing Check Valve from corrosion and extending its service life.
Painting Thickness Test​
Swing Check Valve 8
Penetrant testing reveals small surface flaws on the Swing Check Valve, identifying areas that could affect its strength and functionality.
PT
Swing Check Valve 9
Material inspection verifies that all parts of the Swing Check Valve meet high-quality standards, supporting reliable and long-lasting performance.
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.
Swing Check Valve 10
Swing Check Valves prevent dangerous backflow in chemical plants, controlling fluid direction safely and reducing contamination risks.
Chemical Processing
Swing Check Valve 11
For nuclear operations, Swing Check Valves stop backflow in pressurized systems, protecting sensitive equipment from unexpected reverse flow.
Petrol Chemical
Swing Check Valve 12
For nuclear operations, Swing Check Valves stop backflow in pressurized systems, protecting sensitive equipment from unexpected reverse flow.
O.P.G & Nuclear
Swing Check Valve 13
Swing Check Valves maintain one-way flow in pulp processing, handling thick materials smoothly while reducing blockages and flow interruptions.
Pulp
Swing Check Valve 14
In mining, Swing Check Valves handle rough materials, preventing backflow that could cause system damage or slow down production.
Mining
Swing Check Valve 15
Swing Check Valves control flow direction in water and sewage systems, stopping reverse flow to maintain clean and efficient operations.
Water & Sewage
Swing Check Valve 16
In steam systems, Swing Check Valves manage steam flow direction, preventing backflow that could harm equipment and affect efficiency.
Steam System
Swing Check Valve 17
For boiling systems, Swing Check Valves handle high temperatures, blocking reverse flow to support safe and steady fluid control.
Boiling System

Typical Cast Steel Bolted Cover Swing Check Valve Expanded View

Swing Check Valve 18
1. Body: NTVAL cast steel bodies provide low resistance to flow and ensure optimal strength and performance.
2. Cover: The cover allows access to the internal components of the valve.
3. Cover Gasket: The cover gasket creates a leakproof seal between the bonnet and the body.
4. Seat Ring: The seat ring is aligned and seal-welded into the valve, then precision-ground to ensure a stable shutoff.
5. Disc: The disc allows flow in one direction and prevents backflow, ensuring trouble-free shutoff.
6. Swing Arm: The swing arm enables the disc to open and close.
7 & 8. Disc Nut & Pin: The disc nut and pin secure the disc to the swing arm.
9. Hinge Pin: The hinge pin provides a stable mechanism for the swing arm to operate.
10. Plug: The plug secures the arm pin inside the valve.
11. Plug Gasket: The plug gasket creates a leakproof seal between the plug and the body.
12 & 13. Cover Studs & Nuts: The cover studs and nuts secure the bonnet to the body.
14. Eyebolt: The eyebolt is used to assist in lifting the valve.
Swing Check Valve 19
Standard Integral SeatDesign seals with a Clapper O-ring.
Swing Check Valve 20
Interchangeable Seat Design extends the service life of the valve.

Standard Parts and Materials

NO.

PART NAME

CARBON STEEL

 

ALLOY STEEL

 

STAINLESS STEEL

  

TYPE WCB

TYPE LCB

TYPE WC6

TYPE WC9

TYPE C5

TYPE C12

TYPE CF8M

1

BODY

A216-WCB

A352-LCIB

A217-WC6

A217-WC9

A217-C5

A217-C12

A351-CF8M

2

COVER

A216-WCB

A352-LCIB

A217-WC6

A217-WC9

A217-C5

A217-C12

A351-CF8M

3

DISC

A217CA15or

A351 CF8Mor

A217CA15or

A217CA15or

A217CA15or

A217CA15or

A351-CF8M

  

WCB+410

LCB+316

WC9+410

WC9+410

C5+410

C12+410

 

4

SEATRING

A105

A182-F316

A182F11+STL

F22+STL

F5a+STL

F9+STL

A479-316

5

HINGEARM

A216-WCB

A352-LCB

A217-WC6

A217-WC9

A217-C5

A217-C12

A351-CF8M

6

DISCNUT

A194 Gr8

A194 Gr8

A194 Gr8

A194 Gr8

A194 Gr8

A194 Gr8

A194-8

7

WASHER

A240-304

A240-316

A240-304

A240-304

A240-304

A240-304

A240-316

8

SPLIT PIN

A580-304

A580-316

A580-304

A580-304

A580-304

A580-304

A580-316

9

COVER BOLT

A193-B7

A320-L7

A193-B16

A193-B16

A193-B16

A193-B16

A193-B8

10

COVER NUT

A194-SH

A194-4

A194-4

A194-4

A194-4

A194-4

A194-8

11

HINGE PIN

A479-410

A479-410

A479-410

A479-410

A479-410

A479-410

A479-316

12

FLANGEDPLUG

A479-410

A479-304

A479-304

A479-304

A479-304

A479-304

A479-316

13

GASKET

Graphite+304SS

Graphite+304SS

Graphite+304SS

Graphite+304SS

Graphite+304SS

Graphite+304SS

Graphite+304SS

14

PLUGGASKET

Soft Steel

Soft Steel

SoftSteel

SoftSteel

SoftSteel

Soft Steel

Stainless Steel

15

NAMEPLATE

Stainless Steel

Stainless Steel

Stainless Steel

Stainless Steel

Stainless Steel

Stainless Steel

Stainless Steel

Cast Steel Swing Check Valve

CLASS 150 DIMENSION

CAST STEEL SWING CHECK VALVE
  • Cast steel swing checkvalve
  • Horizontal or verticallines, bolted cover
  • Available inwelded or threadedseat rings
  • Designed according to APl-600
Face to FaceASME/ANSI B16.10
End FlangeASME/ANSI B16.5*
Butt WeldASME/ANSI B16.25
ClassASME/ANSI CL150
Swing Check Valve 21

CLASS 150 DIMENSION

SIZE
(in.)

1-1/2″

2″

2-1/2″

3″

4″

6″

8″

10″

        

Unit:inch

L1:RF

6.5

8

8.5

9.5

11.5

14

19.5

24.5

L2:RTJ

7

8.5

9

10

12

14.5

20

25

L3:BW

6.5

8

8.5

9.5

11.5

14

19.5

24.5

H

5.11

6.3

6.7

7.49

8.87

10.18

12.6

13.72

WT R F

33

38

48

68

110

203

299

430

(bs) BW

28

31

38

56

95

183

266

284

SIZE
(in.)

12″

14″

16″

18″

20″

24″

30″

36″

        

Unit:inch

L1:RF

27.5

31

34

38.5

38.5

51

60

77

L2:RTJ

28

31.5

34.5

39

39

51.5

60.5

77.5

L3:BW

27.5

31

34

38.5

38.5

51

60

77

H

14.96

15.79

18.11

19.88

22.2

26.89

36

41.5

WT RF

628

926

1,102

1,411

1,720

3,285

5,077

8,160

(lbs) BW

572

804

980

1,160

1,495

2,945

4,315

7,010

*26″and larger are available with ASME/ANSI B16.47 end flanges, either Style A or Style B (formerly MSS SP-44 and API 605).

CLASS 300 DIMENSION

CAST STEEL SWING CHECK VALVE
  • Cast steel swing checkvalve
  • Horizontal or verticallines, bolted cover
  • Available inwelded or threadedseat rings
  • Designed according to APl-600
Face to FaceASME/ANSI B16.10
End FlangeASME/ANSI B16.5*
Butt WeldASME/ANSI B16.25
RatingASME/ANSI Class 300
Swing Check Valve 21

CLASS 300 DIMENSION

SIZE
(in.)

2″

2-1/2″

3″

4″

6″

8″

10″

12″
Unit:inch

L1:RF

10.5

11.5

12.5

14

17.5

21

24.5

28

L2:RTJ

11.13

12.13

13.33

14.63

18.13

21.63

25.13

28.63

L3:BW

10.5

11.5

12.5

14

17.5

21

24.5

28

H

6.3

7.44

7.83

8.94

10.94

12.68

15.08

17.13

WT R F

56

72

108

160

299

406

657

916

(bs) BW

43

55

88

102

240

317

525

750

SIZE
(in.)

14″

16″

18″

20″

24″

30″

36″

Unit:inch

L1:RF

33

34

38.5

40

53

62.75

82

 

L2:RTJ

33.63

34.63

39.13

40.75

53.88

63.75

83

 

L3:BW

33

34

38.5

40

53

62.75

82

 

H

20.08

20.51

22.52

24.76

28.03

37

42.99

 

WT R F

1,503

1,649

2,097

2,494

4.5

5,850

10.5

 

(lbs) BW

1,241

1,305

1,803

2,150

3.,870

5,020

9,450

 
*26″and larger are available with ASME/ANSI B16.47 end flanges,either Style A or Style B(formerly MSS SP-44 and API 605).

CLASS 600-1500 DIMENSION

CAST STEEL SWING CHECK VALVE
  • Cast steel swing checkvalve
  • Horizontal or verticallines, bolted cover
  • Available inwelded or threadedseat rings
  • Designed according toAP1-600
Face to FaceASME/ANSI B16.10
End FlangeASME/ANSI B16.5
Butt WeldASME/ANSI B16.25
RatingASME/ANSI Class 600~1500
Swing Check Valve 21

CLASS 600 DIMENSION

SIZE
(in.)

2″

3″

4″

6″

8″

10″

12″

14″

16″

18″

20″

24″
Unit:inch

L1:RF

11.5

14

17

22

26

31

33

35

39

43

47

55

L2:RTJ

11.63

14.13

17.13

22.13

26.13

31.13

33.13

35.13

39.13

43.13

47.25

55.38

L3:BW

11.5

14

17

22

26

31

33

35

39

43

47

55

H

7.38

8.25

10.06

12.94

14.31

18.25

19.13

22.5

26

28

31

34

WT RF

71

130

247

474

849

1,351

1,918

2,068

2,976

4,451

5,269

6,634

(bs) BW

Ge

110

223

364

686

1,081

1,605

1,693

2,469

3,802

4,443

5,137

CLASS 900 DIMENSION

        

SIZE
(in.)

2″

3″

4″

6″

8″

10″

12″

14″

16″

18″

20″

24″
Unit:inch

L1:RF

14.5

15

18

24

29

33

38

40.5

44.5

48

52

61

L2:RTJ

14.63

15.13

18.13

24.13

29.13

33.13

38.13

40.87

44.87

48.5

52.5

61.75

L3:BW

14.5

15

18

24

29

33

38

40.5

44.5

48

52

61

H

10.51

11.42

12.05

13.31

18.11

19.69

22.75

25.47

27.95

30.9

33.46

36.61

WT RF

161

181

307

582

1,210

1,800

3,200

3,850

5,324

7,150

8.8

12.76

(bs) BW

119

136

235

247

1,010

1,545

2,720

3,190

4,510

5,940

7,260

9.9

CLASS 1500 DIMENSION

        

SIZE
(in.)

2″

3″

4″

6″

8″

10″

12″

14″

16″

18″

20″

24″
Unit:inch

L1:RF

14.5

18.5

21.5

27.75

32.75

39

44.5

49.5

54.5

60.5

65.5

76.5

L2:RTJ

14.63

18.63

21.63

28

33.13

39.37

45.12

50.25

55.37

61.37

66.37

77.63

L3:BW

14.5

18.5

21.5

27.75

32.75

39

44.5

49.5

54.5

60.5

65.5

76.5

H

10.51

11.65

13.98

18.31

21.26

22.64

26.38

28.54

31.89

35.63

39.57

44.27

RF

161

276

467

1,067

2,356

3,663

5,445

7,128

9,700

13,060

16,130

23,265

(bs) BW

119

209

362

813

1,910

2,930

4,310

5,600

7,720

10,395

12,770

17,820

*26″and larger are available with ASME/ANSI B16.47 end flanges, either Style A or Style B (formerly MSS SP-44 and API 605).

Tilting Disc Check Valve

TILTING DISC CHECK VALVE
  • Cast Steel TiltingDisc Check Valve
  • Bolted Cover,Horizontal Lines
  • Designed toASME B16.34.API6D
Face to FaceASME/ANSI B16.10
End FlangeASME/ANSI B16.5
Butt WeldASME/ANSI B16.25
ClassASME/ANSI CL 150/300/600
Swing Check Valve 24

CLASS 150 DIMENSION

            

SIZE
(in.)

2″

2-1/2″

3″

4″

6″

8″

10″

12″

14″

16″

18″

20″

24″

26″

28″

30″

32″
Unit:inch

L

203

216

241

292

356

495

622

698

787

864

978

978

1295

1295

1143

1143

1194

D

160

182

196

230

300

390

432

510

540

635

700

770

900

930

991

1020

1150

W

178

198

224

252

326

426

456

530

576

670

740

818

948

988

1050

1090

1240

W.T(kg)

11

16

22

34

62

112

169

238

337

420

550685

685

910

1055

1260

1540

1860

CLASS 300 DIMENSION

            

SIZE
(in.)

2″

2-1/2″

3″

4″

6″

8″

10″

12″

14″

16″

18″

20″

24″

26″

28″

30″

32″
Unit:inch

L

267

292

318

356

444

533

622

711

838

864

978

1016

1346

1346

1295

1372

1448

D

170

196

214

245

320

400

460

540

580

660

725

800

940

970

1040

1080

1210

W

198

220

232

268

360

426

457

572

620

690

760

848

988

1018

1250

1280

1350

W.T(kg)

17

22

32

97

110

162

228

380

443

530

780

980

1320

1364

1762

2050

2870

CLASS 600 DIMENSION

        

SIZE
(in.)

2″

2-1/2″

3″

4″

6″

8″

10″

12″

14″

16″

18″

20″

24″
Unit:inch

L

292

330

356

432

559

660

787

838

889

991

1092

1194

1397

D

185

196

210

270

340

440

520

570

610

690

755

850

990

W

212

225

240

298

405

460

492

602

650

710

780

902

1040

W.T(kg)

27

44

47

115

190

320

430

586

750

1015

1480

2050

2550

*26″and larger are available with ASME/ANSI B16.47 end flanges, either Style A or Style B (formerly MSS SP-44 and API 605).

Swing Check Valve Working Principle

Swing Check Valve 25
The swing check valve uses a built-in rocker swing structure. All the valve’s opening and closing parts are located inside the valve body, so there are no points of leakage except for the sealing gasket and sealing ring at the middle flange. This design effectively prevents any possibility of valve leakage.
 
The connection between the swing check valve and the valve clack features a spherical connection structure, allowing the valve clack to move freely within a 360-degree range, ensuring precise positioning.
 
When the medium flows downstream, it pushes the valve flap open, known as the cracking pressure. If the medium’s pressure drops below the cracking pressure, the valve automatically shuts. In the event of reverse flow, the valve flap seals against the valve seat by the force of the medium, closing the valve.

Swing Check Valve: Structural Features

Simple and Compact
The overall structure is simple and compact, giving it an attractive appearance.
Flexible Installation Options
It can be installed easily in either a horizontal or vertical duct.
Reduced Leakage Risk
The valve flap’s hanging mechanism reduces the risk of leakage from all components inside the body.
Sensitive Response and Excellent Sealing Performance
It responds sensitively to small pressure changes and offers excellent sealing performance.
Minimized Impact from Short Disc Stroke
The swing check valve has a short disc stroke, which minimizes the impact when the valve closes.
Long Service Life and High Reliability
It has a long service life due to minimal wear, making it highly reliable.
Minimal Water Hammer Pressure
When the medium pressure in a swing check valve drops below its cracking pressure, the valve flap closes quickly, resulting in minimal water hammer pressure. This swift closure helps protect the piping system from potential damage caused by sudden pressure surges.
Low Fluid Resistance
The flow through the swing check valve is unobstructed, providing low fluid resistance for the medium. This efficient design helps maintain system pressure and reduces energy consumption. Additionally, the valve’s low resistance minimizes wear and tear, extending its service life in high-flow applications.
360° Range Movement with Spherical Joint Attachment
The rocker arm and valve structure include a spherical joint attachment, allowing the valve flap to move freely within a 360° range and providing acceptable compensation for trace position.

Maintenance of Swing Check Valve

Swing check valves require minimal maintenance and are known for their long lifespan. However, they can develop leaks if foreign particles get stuck between the disc and seat, which can reduce the valve’s effectiveness. To prevent damage to swing check valves, follow these simple maintenance steps:
  • Regularly wipe off dust and dirt.
  • Check for leaks.
  • Replace the valve if significant leakage is found.
  • Inspect for corrosion, rust, and wear.
  • Monitor the pressure and temperature of the fluid to ensure they are within the valve’s limits.
  • Thoroughly clean the removed valve with the appropriate hydraulic liquid or medium.
  • Inspect for debris, scratches, corrosion, wear, or rough surfaces.
  • Smooth and lap any rough areas before reassembling the valve.
  • Keep the valve lubricated in a dry, ventilated room to prevent moisture, rain, and rust.
  • Ensure the valve’s opening and closing parts are in the closed position during storage or transportation.
  • Fix the valve disc in the open position.
  • Block the inner ports at both ends with foam plates, and tightly plug the ports with stuffed caps to prevent dust and rust.
  • Regularly check the valve if stored for an extended period (every three months).
  • Inspect for dirt, rust, and the condition of the sealing surface and welding joints.
  • After cleaning, reapply anti-rust oil for protection.
Swing Check Valve 26

Product Standards

  • Design Standard: API602, ASME B16.34, API6D ensure performance, safety, and reliability for various industries.
  • Structure Length: Compliant with ASME B16.10, ensuring compatibility with existing piping systems.
  • Material and Temperature: ASME B16.34 specifies materials and temperature limits for durability and performance in demanding conditions.
  • Inspection Standard: API598 and API6D standards ensure valves are tested for leaks, pressure, and operational integrity.

Application of Swing Check Valve

  • Suitable Media: Water, steam, oil, nitric acid, acetic acid, strong oxidizing media, and urea, ensuring versatility in various applications.
  • Common Industries: Petroleum, chemical, pharmaceutical, fertilizer, and power industries, supporting essential operations across sectors.
  • Recommended Use: Ideal for clean media, preventing contamination and maintaining operational efficiency.
  • Not Recommended For: Media containing solid particles, high viscosity, or low-flow, pulsating conditions, as these can cause damage to the valve disc and seat, impacting performance.

Installation and Uses of Swing Check Valve

The Rotary Kai Type Check Valve is designed for vertical installation on horizontal pipes and should be prioritized on official road levels. It can also be installed on vertical pipes with a bottom-up medium flow.

Pre-installation Steps:

  • Remove the stuffy cover and foam plate from both ends of the valve channel.
  • Clean the valve disc and inner cavity, removing any grease and debris.
  • Check the valve disc movement by pushing it away from the seat to ensure it moves freely.
  • Inspect valve ends for burrs or edges that could affect sealing.

Installation Guidelines:

  • Ensure the valve is installed in the direction of the flow arrow.
  • For vertical installation, the flow should be from bottom to top.
  • For horizontal installation, the cover should be at the top with upward flow.

Medium Requirements: The medium should be free of hard particles to avoid damage to the valve’s sealing surface.

Fault and Troubleshooting

Swing check valves are crucial components in many systems, as reverse flow can sometimes cause significant damage. Therefore, it’s essential to detect any issues with the valves early to prevent pipeline shutdowns and costly repairs. The most common problems with Check Valves include:
Water Hammer
Water hammer is a surge of pressure or a high-pressure wave that occurs when a moving fluid is suddenly stopped or forced to change direction. This often happens with swing check valves when the downstream flow reverses, causing the valve to close abruptly. This sudden closure creates a pressure wave that travels through the pipe, potentially damaging the tubing, fittings, and the valve itself.
Improper Installation, Maintenance, and Assembly
As with any mechanical equipment, incorrect installation, maintenance, or assembly of Check Valves can lead to damage, failure, and costly repairs. It’s crucial to install the valve in the correct direction and consider factors like pipe flow power, the valve’s position (horizontal or vertical), and whether the valve type is suitable for the application.
Reverse Flow
Reverse flow occurs when the valve allows fluid to flow back to the upstream side, leading to bi-directional flow through the valve. This can be particularly harmful to equipment such as discharge pumps, as reverse flow forces the pump’s impeller to rotate in the opposite direction, which can lead to excessive wear, mechanical damage, and potential pump failure.
Debris in the Pipeline
Debris can get trapped in the valve, causing it to stick in either the open or closed position. Moving debris can damage the internal mechanism, potentially breaking or dislodging valve components and sending more debris downstream. This not only compromises the valve’s function but can also lead to contamination or damage to other equipment in the system.

Preventive Maintenance Tips

Keep the Pipeline and Valves Clean
The first and most important step to prevent valve failure is to keep the pipeline and valves clean and free of debris. This can be achieved by adding filters and coverings where needed and regularly flushing the piping system to remove any settled debris.
Lubricate the Valves
Regular lubrication of Check Valves is essential because it reduces friction between moving parts, extends the lifespan of valve components, and improves efficiency.
Proper Positioning and Use
Always make sure that valves are correctly positioned and used according to instructions. Improper installation or using the wrong type of Check Valve can shorten the valve’s lifespan. Additionally, establish a regular maintenance schedule to replace faulty valves at the first sign of failure.
Example #1
  • Fault location: Leakage at the connection between the valve cover and the valve body.
  • The cause of the failure:
    • The nut of the connecting bolt is not tightened, or the cloth is evenly loosened.
    • The sealing surface of the middle flange is damaged or has dirt.
    • The gasket is damaged.
  • Solution:
    • Tighten the nut evenly.
    • Repair the sealing surface and remove dirt.
    • Replace the gasket.
Example #2
  • Fault location: Leakage at the sealing surface of the valve disc and the valve seat.
  • The cause of the failure:
    • The nut of the connecting bolt is not tightened, or the cloth is evenly loosened.
    • The sealing surface of the middle flange is damaged or has dirt.
    • The gasket is damaged.
  • Solution:
    • Open the valve body and clean it.
    • Re-grind or re-process.

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Additional General Insights Here

Specs of Swing Check Valve

One-Way Flow Mechanism

Swing Check Valves are designed to facilitate easy maintenance within the system and prevent the backflow of fluids. These valves operate as one-way mechanisms, allowing flow to move freely in one direction while blocking it in the reverse direction. An external lever and weight are used to speed up the closure of the disc, ensuring effective flow control.

Rapid Closure System

The closure of a Swing Check Valve relies on gravity, but gravity alone is insufficient to close the valve quickly enough to prevent backflow. To address this, a weight is used to ensure the valve closes rapidly, preventing reverse velocities from slamming the disc into the valve seat. This rapid closure mechanism protects the valve disc, seat, and surrounding pipeline equipment from potential damage.

Low-Pressure Drop

The design of Swing Check Valves ensures a low-pressure drop across the valve, which is crucial for maintaining efficient system operation. For instance, the streamlined flow path minimizes resistance, allowing fluids to pass through with minimal energy loss. This feature is particularly important in applications where maintaining pressure is critical for system performance.

Features of Swing Check Valve

Durable Construction

Swing Check Valves are crafted from high-grade stainless steel and other durable materials, providing resistance to corrosion and wear even in challenging industrial environments. This strong construction supports a longer lifespan for the valves and withstands high pressure and temperature variations.

Reliable Backflow Prevention

These valves feature a swing disc that allows flow in one direction and automatically closes to prevent reverse flow. The swing mechanism is designed for minimal pressure drop and efficient flow control. On top of that, the precision-fit disc and seat create a tight seal, preventing leakage and maintaining system integrity.

Easy Installation and Maintenance

Swing Check Valves feature flanged or threaded connections for easy installation and a removable bonnet for quick maintenance. NTVAL’s design simplifies servicing, reducing downtime, and ensures compatibility with various piping systems.

Benefits of Swing Check Valve

Enhanced Operational Efficiency

Swing Check Valves provide efficient flow control, minimizing energy loss in the system, leading to reduced operational costs and improved system performance. The low-maintenance design contributes to higher overall efficiency, while reliable backflow prevention maintains consistent operation and prevents system disruptions.

Long-Term Cost Savings

The durable materials and strong construction of Swing Check Valves extend their lifespan, reducing the need for frequent replacements and costly repairs. Easy maintenance features lower upkeep costs and minimize downtime. Reliable prevention of backflow and leakage protects the system from potential damage, resulting in further cost savings and improved operational efficiency.

Versatility and Adaptability

Swing Check Valves are suitable for various industrial applications, including oil, chemical, and water treatment plants. Their ability to handle different mediums and withstand harsh conditions makes them highly versatile. Easy installation and compatibility with standard piping systems enhance their adaptability, making them effective in diverse operational settings.

Applications of Swing Check Valve

Petrochemical Industry

In the petrochemical industry, Swing Check Valves are very important for keeping operations safe and efficient. They stop backflow in pipelines carrying various chemicals and gases. Their strong build handles the tough conditions found in petrochemical plants. This helps maintain the flow and keeps the system clean from contamination.

Water and Sewage Treatment

In water and sewage treatment plants, Swing Check Valves manage the flow of untreated and treated water. They prevent backflow, which is vital for keeping the treatment process clean and efficient. NTVAL recommends that the valves’ strong build lets them handle the rough and corrosive nature of sewage. This helps the treatment systems work smoothly and last longer.

Steam and Boiling Systems

Swing Check Valves are key in steam and boiling systems to control steam flow direction. For instance, they stop steam from flowing backward, which can cause problems or damage. These valves work well under high temperatures and pressures found in these systems. Additionally, they help boilers and steam networks run safely and efficiently.

Mining and Mineral Processing

Swing Check Valves are essential in mining and mineral processing, where they manage the flow of slurry and other abrasive materials. They stop backflow, which can lead to equipment wear and pipeline damage. Their robust design makes them well-suited to withstand the harsh, abrasive conditions often found in mining operations.
Swing Check Valve 27
Swing Check Valve 28

3 Considerations When Buying Swing Check Valve

01

Uses Stainless Steel 316

When choosing a Swing Check Valve, it’s important to pick the right material for the fluid it will handle. The valve material should resist the chemicals, temperature, pressure, and abrasiveness of the environment. For example, stainless steel 316 is good for corrosive environments, while carbon steel works well with non-corrosive fluids.

02

Pressure Ratings of 150 PSI to 300 PSI

Check the pressure and temperature ratings of the Swing Check Valve to match your system’s needs. Swing Check Valves typically have ratings like 150 PSI or 300 PSI. NTVAL recommends ensuring the valve can handle your system’s maximum pressure and temperature to prevent issues.

03

Valve Size of ½ Inch to 24 Inches

Consider the size of the valve and how it affects the flow rate in your system. Swing Check Valves come in different sizes, usually from ½ inch to 24 inches or more. Similarly, the valve size should match the pipe diameter for proper flow control and minimal pressure drop. Knowing the required flow rate (GPM – gallons per minute) will help you pick the right valve size for efficient operation.

FAQs About Swing Check Valve

There is no minimum order quantity; even a single swing check valve can be ordered.
Swing check valves typically come with pressure ratings of 150 PSI, 300 PSI, or higher, depending on the specific application.
The lead time for swing check valve orders depends on the valve size and quantity, but generally, production takes around 5-8 weeks.
At NTVAL, the payment terms are 30% down payment with the balance due before shipment, or 100% irrevocable letter of credit (LC) at sight.

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