Industrial Check Valves – Reliable Non-Return Solutions
SFAN Valve is a professional manufacturer of industrial check valves for critical flow-control applications. We supplies a wide range of check valves (non-return valves) engineered to prevent reverse flow and protect piping systems. Our products include forged swing check, dual-plate wafer check, and tilting-disc designs in both carbon and stainless steel.
| Design | Complies to API 602, ASME B16.34 for high pressure-temperature service. |
|---|---|
| Size Range | 1/4~4" (8mm~100mm) |
| Pressure Class | ASME Class 150, 300, 600, 900, 1500, 1680, 2500, 4500# |
| End Connection | Socket Weld (SW), Threaded (NPT/BSP), Butt weld(BW) and Flange( RF, FF, RTJ), or Mixed end |
| Flow Bore | Reduced bore or Full bore |
| Wall thickness | Complies to API 602, Corrosion Allowance more than 3mm |
| Body to bonnet | Bolted bonnet, Welded bonnet, Or Pressure Seal Bonnet [For welded bonnet valves, the bonnet is threaded in and torqued to an engineered torque value and the body bonnet joint is strength-welded, offering double protection against leakage. (body/bonnet threads and strength-weld).] |
| Body Material | Carbon steel(A105N, LF2, LF3), Stainless steel(F304(L), F316(L), F51, F53), Alloy steel(Inconel 625, 825, Hastelloy C-276) or other |
| Trim Material | As buyers' request or following list. |
| Disc Material | Stellite (CoCr alloy) hardfaced ensures low friction and long service life. |
| Seat Material | Stellite (CoCr alloy) hardfaced ensures low friction and long service life. |
| Disc Type | Piston type or Swing type |
| Packing | No Packing |
| Low fugitive emission | Complies to ISO 15848-1 or ISO 15848-2 |
| Valve test | Complies to API 598 |
| Valve guarantee | 18 months after shipments and 12 months after installed |
| Medium | Water, Steam, Oil, Gas, Oxygen, Hydrogen, Liquid Nitrogen, and other |
| Temperature | -196℃(cryogenic design) to 560℃ |
| Brand | SFAN VALVE OR "OEM" |
Forged Steel F304 SS T Type Piston Lift Check Valve – 1″, 800LB, Socket Weld Ends, API 602 Compliant
Forged Steel Flange End Check Valve – A105, 1½”, 150LB Rating, Piston Lift Mechanism, API 602 Compliant
Forged Steel Pressure Seal Bonnet Check Valve – A105, 2500LB Rating, Socket weld Ends, API 602 Compliant
Forged Steel T Type Check Valve – A105, 1500LB Rating, Socket Weld Ends, Pressure Seal Bonnet
Forged Steel T Type Piston Lift Check Valve – A105, 1½”, 800LB, Socket Weld Ends, API 602 Compliant
Forged Steel T Type Swing Check Valve – A105, 1½”, 800LB, Socket Weld Ends, API 602 Compliant
Forged Steel Weld Bonnet Check Valve – A105, 3/4″, 800LB Rating, Socket Weld Ends, API 602 Compliant
Forged Steel Y Type Pattern Check Valve – A105, 800LB Rating, Threaded Ends, API 602 Compliant
Forged Steel Y Type Strainer Filter – A105, 800LB Rating, Socket Weld Ends, Bolted Bonnet
Standards Design In Forged Steel Valves
- Designed and manufactured in accordance with API 602.
- End connections per the following standards:
a) Butt weld dimensions: ASME B16.25.
b) Socket weld dimensions: ASME B16.11.
c) Flange end dimensions: ASME B16.5 and ASME B16.47. - Face-to-face dimensions in accordance with ASME B16.10-2023.
- Testing and inspection performed per API 598.
- Materials conform to ANSI/ASTM standards.
Check more standard decsription: The Ultimate Guide to Industrial Valve Standards and Rigorous Testing.
| Design | Complies to API594, BS1868, ASME B16.34 for high pressure-temperature service. |
|---|---|
| Size Range | 2~48" (50mm~1200mm) |
| Pressure Class | ASME Class 150, 300, 600, 900, 1500, 1680, 2500# |
| End Connection | Butt weld(BW) and Flange( RF, FF, RTJ), or Mixed end |
| Flow Bore | Reduced bore or Full bore |
| Wall thickness | Complies to API594, BS1868, ASME B16.34 |
| Body to bonnet | Bolted bonnet, Or Pressure Seal Bonnet |
| Body Material | Carbon steel(WCB, LCB, LCC), Stainless steel(CF8M, CF3M), Alloy steel(CN7M, CW12MW, CW6MC, CY40, CR206) or other |
| Trim Material | As custom combinations or following list. |
| Disc Material | Stellite (CoCr alloy) hardfaced ensures low friction and long service life. |
| Seat Material | Stellite (CoCr alloy) hardfaced ensures low friction and long service life. |
| Packing | No Packing |
| Low fugitive emission | Complies to API 624, ISO 15848-1 or ISO 15848-2 |
| Valve test | Complies to API 598 |
| Valve guarantee | 18 months after shipments and 12 months after installed |
| Medium | Water, Steam, Oil, Gas, Oxygen, Hydrogen, Liquid Nitrogen, and other Corrosive Medium |
| Temperature | -196℃(cryogenic design) to 560℃ |
| Brand | SFAN VALVE OR "OEM" |
Axial Flow Check Valve – 6″ Flanged, 150LB Rating, WCB Cast Steel, ASME B16.34 Compliant
Axial Flow Check Valve – 8″ Flanged, 900LB Rating, WCB Cast Steel, ASME B16.34 Compliant
Cast Steel Swing Check Valve – 6″ Flanged, 300LB Rating, WCB Material, ASME B16.34 Compliant
CF8M Strainer Filter – 2 Inch, Threaded Ends, Y Type Design, ASTM A351 CF8M, ASME B16.34 Compliant
Double Plate Wafer Check Valve – 5″ Size, 150LB Rating, WCB Cast Steel Body, Spring-Loaded Design, API594 Compliant
Wafer Check Valve CF8M – Small Size, 316L Stainless Steel, Spring-Loaded, ASME B16.34 Compliant
Standards Design In Cast Steel Check Valves
- Designed and manufactured in accordance with API 594, BS1868, or ASME B16.34..
- End connections per the following standards:
a) Butt weld dimensions: ASME B16.25.
b) Flange end dimensions: ASME B16.5 and ASME B16.47. - Face-to-face dimensions in accordance with ASME B16.10-2023.
- Testing and inspection performed per API 598.
- Materials conform to ANSI/ASTM standards.
Check more standard decsription: The Ultimate Guide to Industrial Valve Standards and Rigorous Testing.
Industrial Check Valves – Reliable Non-Return Solutions
SFAN Valve supplies a wide range of check valves (non-return valves) engineered to prevent reverse flow and protect piping systems. Our products include forged swing check, dual-plate wafer check, and tilting-disc designs in both carbon and stainless steel.
Manufactured in accordance with API602, API594,ASME B16.34, and BS1868 provide superior durability and corrosion resistance for demanding industries such as oil & gas, chemical processing, power generation, and water treatment.
We offer A105/WCB carbon steel , F316/F316L/CF8M stainless steel and inconel 625/825 alloy steel and so on gate valves with a variety of end connections — socket weld, threaded (NPT/BSP), butt weld, wafer and flanged ends options available..
Check Valve Product Family
Forged Steel Check Valves
Classic single-disc design for robust service in pipelines. Suitable for larger diameters and low-to-medium velocity systems.
View Details →Cast Steel Check Valves
Cast steel check valves provide strong, reliable backflow prevention with excellent durability, making them ideal for high-pressure, high-temperature industrial applications.
View Details →Dual-Plate Wafer Check Valves
Compact wafer style with dual spring-loaded plates for fast closing and minimal pressure drop—ideal for tight piping spaces.
View Details →Axial Flow Check Valves
Axial flow check valves deliver fast, vibration-free operation with minimal pressure drop, ensuring reliable one-way flow and excellent performance in critical systems.
View Details →Key Specifications
Typical Applications
- Steam, condensate and boiler systems
- Oil & gas pipeline protection
- Chemical process lines and refineries
- Pump discharge lines to prevent back-flow
- HVAC and water treatment systems
Why Choose SFAN Check Valves
- Experience in forged & cast valve manufacturing
- Strict quality control and 100% pressure testing
- Customizable trim, seats, and end connections
- ISO 9001 & CE certified production
- Global export and OEM support
FAQs About Check Valves
What is the difference between swing check and wafer check valves?
Swing check valves use a hinged disc that swings open; they suit larger diameters and lower velocities. Wafer (dual-plate) check valves are compact with two spring-loaded plates, closing faster and offering lower pressure drop.
Can check valves be used in pump discharge lines?
Yes. Check valves are commonly installed on pump discharge to prevent reverse flow and protect pumps from backspin and water hammer.
Do you offer soft-seat check valves for leak-tight sealing?
Yes. We provide soft-seat (PTFE/RTFE) options for applications requiring tight shut-off; metal seats are available for high-temperature or erosive services.
Related Products
Manuals-Forged-Steel-Gate-Globe-Check-Valves-IOM-Sfanvalve-en
Manuals-Cast-Steel-Gate-Globe-Check-Valves-IOM-Sfanvalve-en
Why Choose SFAN VALVE
- Over 15 years of experience in forged steel valve manufacturing
- 100% pressure-tested before delivery according to API 598
- ISO 9001 certified
- OEM customization and quick delivery
- Exported to Europe, Middle East, and Southeast Asia
FAQ
What Is Check Valve?
Forged Steel VS Cast Steel
Forged steel gate valves are manufactured by shaping solid metal billets under high pressure and heat. This process aligns the grain structure, eliminates internal voids, and results in superior mechanical strength, impact resistance, and fatigue endurance. In contrast, cast steel gate valves are formed by pouring molten metal into molds—a method that can introduce porosity, inclusions, or micro-cracks if not tightly controlled.
SFAN Valve’s forged steel gate valves—available in sizes from 1/4″ to 4″ (DN10–DN100)—are engineered with solid wedge designs and OS&Y (Outside Screw and Yoke) stems for reliable shutoff and visual position indication.
While cast steel gate valves are cost-effective for large-diameter, —available in sizes from 2″ to 48″ (DN50–DN1200)-are engineered with Flexible or Solid wedge designs and OS&Y (Outside Screw and Yoke) stems for reliable shutoff and visual position indication.
More details in “Forged Steel Gate Valve vs Cast Steel Gate Valve: A Selection Guide for High-Pressure Applications“.
