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Email:- industrialengineeringsyndicate@gmail.com
Description
BHEL Cast Steel Swing Check Valves are designed to permit flow in one direction and automatically prevent reverse flow in pipelines. These valves protect pumps, compressors, boilers, and process equipment from damage caused by backflow and pressure reversal. They are widely used in power plants, refineries, and process industries.
Design Standards
- Design & Manufacture: BS 1868 / ASME B16.34
- Face-to-Face: ASME B16.10
- Flange Dimensions: ASME B16.5
- Butt Weld Ends: ASME B16.25
- Inspection & Testing: API 598
Material of Construction (MOC)
Body & Bonnet
- ASTM A216 Gr. WCB (Cast Carbon Steel)
- WC6 / WC9 Alloy Steel (for high-temperature service)
- Stainless Steel grades available for special applications
Trim
- Stainless Steel hinge pin
- Hard-faced seat ring
- Hard-faced disc seating surface
- Graphite gasket for high-temperature sealing
Pressure Ratings
- Class 150
- Class 300
- Class 600
- Higher pressure classes available for special requirements
Size Range
- 2" to 24" (50 mm to 600 mm) standard range
- Larger sizes available for specific applications
Temperature Range
- Up to 425°C for WCB material
- Up to 593°C for alloy steel constructions used in power plant service
End Connections
- Flanged Ends (RF / RTJ)
- Butt Weld Ends (BWE)
Working Principle
- The disc swings open under forward flow.
- When flow stops or reverses, the disc automatically returns to the seat.
- Prevents reverse flow without external power or manual operation.
Design Features
- Bolted Bonnet Construction
- Swing-Type Disc
- Renewable Seat Rings
- Heavy-Duty Hinge Mechanism
- Low Pressure Drop Design
- Optional Lever & Weight Arrangement
- Optional Anti-Slam Device for large sizes
Key Features
✔ Automatic non-return operation
✔ Protects pumps and compressors from backflow
✔ Low flow resistance
✔ Robust cast steel construction
✔ Suitable for high-pressure and high-temperature service
✔ Long service life with minimal maintenance
✔ Reliable sealing performance
Applications
- Thermal Power Plants
- Steam & Boiler Systems
- Refineries
- Petrochemical Plants
- Oil & Gas Industries
- Water Treatment Systems
- Chemical Process Industries
Summary
BHEL CS Swing Check Valves are heavy-duty non-return valves engineered for critical industrial services. Their rugged cast steel construction, low pressure loss, and automatic backflow prevention make them ideal for power generation, refinery, and process industry applications.
