American Standard Swing Welded Check Valve

The American standard swing welded check valve is a valve that complies with American standards such as ANSI and API. It adopts a swing valve disc rotating design around the axis and is connected to the pipeline through welding (SW/BW). It automatically opens and closes by the flow of the medium and is designed for high-pressure, high-temperature, and corrosive medium pipeline systems. It can quickly block backflow and is suitable for harsh working conditions such as petroleum and chemical industries.

  • Flexible installation and convenient maintenance
  • Quick response and anti backflow capability
  • No leakage and corrosion resistance characteristics
  • Streamlined low resistance structure and sealing optimization
  • Standard compliance and high pressure design
Flexible installation and convenient maintenance
  • Flexible installation and convenient maintenance
    01
    Support horizontal or vertical pipeline installation (no need to adjust the valve body direction), suitable for complex spatial layouts; Welding connections avoid the risk of flange leakage and reduce installation costs.
  • 02
    The modular structure allows for online replacement of valve discs and seals, reducing maintenance downtime by 50%, and standardizing parts reduces spare parts inventory pressure.
Quick response and anti backflow capability
  • Quick response and anti backflow capability
    01
    The valve disc can quickly close within 0.5 seconds through gravity or spring assistance, effectively suppressing water hammer effect (reducing pressure peak by 80%) and protecting key equipment such as pumps and compressors.
  • 02
    Multi petal design (DN>600) disperses impact force and adapts to high-pressure backflow conditions in large-diameter pipelines.
No leakage and corrosion resistance characteristics
  • No leakage and corrosion resistance characteristics
    01
    The rocker pin adopts an internal design, and the middle flange uses an internal pressure self sealing structure to eliminate external leakage points and avoid the risk of hazardous media leakage such as sulfur-containing oil and gas.
  • 02
    Optional lining rubber (EPDM) or hard alloy overlay sealing surface, resistant to corrosive media such as H ₂ S, acid and alkali, extending the service life of valves in chemical and petrochemical scenarios.
Streamlined low resistance structure and sealing optimization
  • Streamlined low resistance structure and sealing optimization
    01
    The straight through flow channel design reduces fluid turbulence and reduces the drag coefficient by 20% -30% compared to traditional valves, making it suitable for high flow steam and oil transportation scenarios.
  • 02
    Adopting an internal rocker arm swing structure, the valve disc and rocker arm are connected by a spherical surface, allowing for 360 ° micro compensation, and the sealing surface fits more tightly, with a leakage level of ANSI VI.
Standard compliance and high pressure design
  • Standard compliance and high pressure design
    01
    Compliant with American standards such as ANSI B16.34 and API 6D, the valve body adopts precision casting or forging technology, and can support up to Class 2500 (42MPa) high-pressure working conditions, meeting the requirements of harsh scenarios such as petroleum and chemical industries.
  • 02
    The pressure bearing parts are made of high-strength materials such as chromium molybdenum steel and stainless steel (such as CF8M, ZG15CrMoV), combined with welding technology (SW/BW), to ensure the stability of the valve in high temperature (up to 800 ℃), high pressure, and sulfur-containing media.
Main Component Materials

Part Name

WCB

WC6

WC9

CF8

CF8M

valve body

A216 WCB

A217 WC6

A217 WC9

A351 CF8

A351 CF8M

valve seat

A105/STL.6

A182 F11/STL.6

A182 F22/STL.6

A182 F304

A183 F316

valve cover

A216 WCB

A216 WCB

A216 WCB

A351 CF8

A351 CF8

transverse pin

A276 410

A276 304

A276 304

A276 304

A276 316

Locking screw

A193 B8

A193 B8

A193 B8

A193 B8

A193 B8

nameplate

AISI 304

AISI 304

AISI 304

AISI 304

AISI 304

rivet

AL

AL

AL

AL

AL

Self sealing seat

A105

A182 F11

A182 F22

A182 F304

A182 F316

Self sealing gasket

304 wire+flexible graphite

Self sealing ring

A182 F6a

A182 F6a

A182 F6a

A182 F304

A182 F316

pendant collet

A182 F6a

A182 F11

A182 F22

A182 F304

A182 F316

Tighten the bolt

A193 B7

A193 B7

A193 B7

A193 B8

A193 B8

nut

A194 2H

A194 2H

A194 2H

A1948

A1948

Valve disc cover

A182 F6a

A182 F304

A182 F304

A182 F304

A182 F304

hex socket head bolt

A193 B8

A193 B8

A193 B8

A193 B8

A193 B8

valve

A105/STL.6

A182F11/STL.6

A182 F22/STL.6

A182 F304

A182 F316

rocker arm

A216 WCB

A217 WC6

A217 WC9

A351 CF8

A351 CF8M

support

A216 WCB

A217 WC6

A217 WC9

A351 CF8

A351 CF8M

elastic washer

17-4PH

17-4PH

17-4PH

17-4PH

17-4PH

Eye bolt

A193 B7

A193 B7

A193 B7

A193 B7

A193 B7

Performance Specifications & Dimensions
  • Nominal Pressure PN
    1.6/2.5/4.0/6.4/10.0/16.0/25.0
  • Nominal pressure class
    150~2500Lb
  • Shell F
    Px1.5
  • Sealing Pressure
    Px1.1
  • Medium
    Water, steam, oil
  • Temperature (℃)
    WCB ≤425, WC1 ≤450, WC6 ≤550, WC9 ≤590

CL900

Specification (NPS)

in

2

2 1/2

3

4

6

8

10

12

14

16

Structural length (mm)

L

368

419

381

457

610

737

838

965

1029

1130

L1

371

422

384

460

613

740

841

968

1039

1140

L2

216

254

305

356

508

660

787

914

991

1092

Center height (mm)

H

215

245

292

318

400

464

517

592

640

700

Weight (Kg)


25

35

46

68

170

460

700

1020

1220

1350


CL1500

Specification (NPS)

in

2

2 1/2

3

4

6

8

10

12

14

16

Structural length (mm)

L

368

419

470

546

705

832

991

1130

1257

1384

L1

371

422

473

549

711

842

1001

1146

1276

1406

L2

216

254

305

406

559

711

864

991

1067

1194

Center height (mm)

H

245

265

300

342

438

534

578

648

700

770

Weight (Kg)


26

36

50

80

290

490

750

1110

1415

1605


CL2500

Specification (NPS)

in

2

2 1/2

3

4

6

8

10

12

Structural length (mm)

L

451

508

578

673

914

1022

1270

1422

L1

454

514

584

683

927

1038

1292

1445

L2

279

330

368

457

610

762

914

1041

Center height (mm)

H

250

280

308

352

440

540

580

660

Weight (Kg)


60

85

100

165

460

900

1300

1800

Valve Application
  • Oil & Gas Transportation

    Oil and gas transportation involves multiple modes such as pipelines and ships, and is the core link of the energy supply chain.

  • Chemical Raw Material Control

    The control of chemical raw materials covers the entire process of mining, storage, and production, ensuring safety and process stability.

  • High Temperature SteamPipeline in Power System

    High temperature steam pipelines are the core of energy transmission in power systems, supporting the efficient operation of thermal and nuclear power plants.

  • Other Industries

    Valves control fluids in multiple industries such as new energy and electronics, ensuring safe and efficient production.

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