Duplex Steel Ball Valve Manufacturer in India
In environments where corrosion resistance and mechanical strength are equally important, duplex steel ball valves are widely used due to their balanced properties. These valves combine high tensile strength with excellent resistance to chloride-induced corrosion, making them suitable for aggressive service conditions.
As a Duplex Steel Ball Valve Manufacturer in India, these valves are supplied for applications requiring reliable isolation, durability, and long service life in challenging environments. Their design supports efficient flow control while maintaining structural integrity under varying pressure and temperature conditions.
How Duplex Steel Ball Valves Work
Duplex steel ball valves operate using a rotating ball with a central bore. When the valve is actuated, the ball turns to either allow flow through the bore or block it completely.
The seating arrangement ensures that the ball maintains proper contact with the seats, providing effective sealing. Depending on the design, the ball may be supported by seats or trunnions to handle different pressure conditions.
Benefits of Duplex Steel Ball Valves
- High strength with improved resistance to stress and fatigue
- Excellent corrosion resistance in chloride and marine environments
- Reliable sealing performance under varying operating conditions
- Suitable for both moderate and high-pressure applications
- Longer service life in aggressive media handling
- Reduced maintenance requirements due to durable construction
Types of Duplex Steel Ball Valves
Duplex Trunnion Ball Valve
Designed for high-pressure applications with additional support for the ball to reduce operating torque and improve stability.
Duplex Floating Ball Valve
Suitable for moderate pressure systems where the ball is supported by seats, ensuring tight sealing through pressure-assisted contact.
Design Standards
Duplex steel ball valves are manufactured in accordance with international standards to ensure performance and reliability:
- API 6D
- API 608
- ASME B16.34
- BS 5351
Inspection and Testing Standards
Each valve is tested to verify sealing performance and structural integrity:
- API 598
- Hydrostatic shell and seat testing
- Visual and dimensional inspection
Body and Trim Material Compatibility
| Material | Grade | Applications |
|---|---|---|
| Duplex Steel | F51, 2205 | Offshore, seawater and marine systems |
| Super Duplex Steel | F53, F55, 2507 | High chloride and aggressive environments |
| Stainless Steel | F316, F316L | Chemical and corrosive media |
| Carbon Steel | WCB | General industrial service with coating options |
| Alloy 20 | CN7M | Acidic chemical applications |
| Hastelloy | C276 | Highly corrosive environments |
| Inconel | 625 | High temperature and pressure systems |
Industries Served
- Oil and Gas: Offshore pipelines and processing systems
- Marine and Offshore: Seawater handling and offshore installations
- Chemical and Petrochemical: Handling aggressive and corrosive media
- Water and Desalination: High salinity water systems
- Power Generation: Cooling water and auxiliary systems
- Metal and Steel: Process fluid handling in harsh environments
Special Features
- Superior resistance to pitting and crevice corrosion
- High mechanical strength compared to standard stainless steel
- Suitable for high-pressure and corrosive environments
- Available in floating and trunnion mounted designs
- Compatible with manual and automated operation
- Custom configurations based on application requirements
