Forged Steel Trunnion Mounted Ball Valve
| Design Standard | API 6D, ASME B16.34, ASME B16.5, API 607, ISO 17292 |
|---|---|
| Size Range | DN50 (2") – DN1200 (48") |
| Pressure Rating | Class 150 – Class 2500; PN16 – PN100 |
| Body Material | A105, F304, F316, F321, F51, F53, F55 (Forged Carbon/Stainless Steel) |
| End Connection | Flanged (RF, RTJ, BW), Butt Weld |
Product Description
Key Features
Forged Steel Trunnion Mounted Ball Valve
The forged steel trunnion mounted ball valve is engineered to deliver uncompromising performance in the most demanding industrial flow control environments. Built to address critical pain points such as high-pressure leakage, stem failure, and premature wear in long-service applications, this valve combines robust forged steel construction with precision trunnion design—making it the gold standard for industrial procurement managers, process engineers, and project leaders who prioritize reliability, safety, and operational efficiency.
| Parameter | Details |
|---|---|
| Product Name | Forged Steel Trunnion Mounted Ball Valve |
| Model/Series | FS-TB Series |
| Size Range | DN50 (2″) – DN1200 (48″) |
| Pressure Rating | Class 150 – Class 2500; PN16 – PN100 |
| Connection Type | Flanged (RF, RTJ, BW), Butt Weld |
| Design Standard | API 6D, ASME B16.34, ASME B16.5, API 607, ISO 17292 |
| Body Material | A105, F304, F316, F321, F51, F53, F55 (Forged Carbon/Stainless Steel) |
| Ball/Stem Material | F304, F316L, 17-4PH, Inconel 718, Stellite 6 |
| Seat Material | PTFE, Reinforced PTFE, Graphite, Metal-to-Metal (Stellite/Inconel), PEFE |
| Operation Method | Manual (Worm Gear Handwheel), Pneumatic, Electric, Hydraulic Actuation |
| Special Design | Trunnion Mounted Support, Anti-Blowout Stem, Fire-Safe Construction, Double Block & Bleed (DB&B) |
| Operating Temperature | -196°C (-320°F) to 600°C (1112°F) |
| Suitable Media | Oil, Natural Gas, Steam, Corrosive Chemicals, Water, Slurries, Cryogenic Fluids |
Core Advantages: Solving Your Critical Operational Pain Points
1. Unmatched Sealing Integrity Under Extreme Pressure
The trunnion mounted design mechanically supports the ball, eliminating seat deformation under high pressure and preventing the leakage that plagues floating ball valves in large-bore, high-pressure applications. This ensures bubble-tight shutoff even at Class 2500 pressures, eliminating costly process downtime and safety risks.
2. Extended Service Life & Reduced Wear
Forged steel construction provides superior mechanical strength and resistance to fatigue, while the trunnion support minimizes friction between the ball and seats. This reduces operating torque and wear, extending the valve’s service life by up to 30% compared to floating ball designs, lowering long-term maintenance costs.
3. Enhanced Safety & Compliance
Built with an anti-blowout stem design and fire-safe construction per API 607, the valve prevents catastrophic stem failure and secondary leakage in the event of a fire. It also meets strict fugitive emission standards (ISO 15848), making it ideal for environmentally regulated industries such as oil and gas and petrochemical processing.
4. Flexible Operation & Installation
Available in flanged and butt-weld connections, the valve can be configured for manual or automated operation, adapting to a wide range of plant control systems. The trunnion design also allows for Double Block & Bleed (DB&B) functionality, enabling safe isolation and pressure testing without removing the valve from the pipeline.
Technical Details: Precision Engineering for Reliability
Material Science for Durability
- Body: Forged from high-grade carbon or stainless steel alloys, the body offers exceptional resistance to impact, corrosion, and thermal stress, ensuring structural integrity in cryogenic to high-temperature applications.
- Ball & Stem: Precision-machined from corrosion-resistant alloys (including Inconel and Stellite), the ball and stem resist cavitation, erosion, and galling, while the anti-blowout stem design locks the stem in place under pressure.
- Seat: A layered soft or metal-to-metal seat design adapts to thermal expansion and contraction, providing consistent sealing performance across a wide temperature range. Soft seats deliver tight shutoff for general applications, while metal seats are engineered for high-temperature and abrasive media.
Trunnion Mounted Design Breakdown
The trunnion support system:
- Distributes the ball’s weight and pressure loads to the body, reducing seat stress and enabling large-bore, high-pressure operation.
- Minimizes friction during opening/closing, lowering operating torque and allowing for smaller, more cost-effective actuators.
- Enables bi-directional sealing, ensuring reliable performance regardless of flow direction.
Application Scenarios: Proven Performance Across Industries
Our forged steel trunnion mounted ball valve is the preferred choice for mission-critical systems in:
- Oil & Gas: Pipeline transmission, refinery processing, offshore platforms, and LNG terminals handling crude oil, natural gas, and liquefied gases.
- Power Generation: Boiler feedwater, steam lines, and exhaust systems in coal, gas, and nuclear power plants.
- Chemical & Petrochemical: Corrosive chemical processing, solvent recovery, and high-temperature reaction systems.
- Water & Wastewater: High-pressure distribution networks and raw water intake systems.
- Mining & Minerals: Slurry transport and ore processing systems.
- Cryogenic & Industrial Gases: LNG, liquid nitrogen, and industrial gas storage and distribution.
Maintenance Convenience: Minimizing Downtime
- In-Line Serviceability: The top-entry design allows quick access to the ball, seats, and stem without removing the valve from the pipeline, reducing maintenance time by up to 50%.
- Modular Components: Seats and seals are replaceable, enabling fast repairs without specialized tools or extended shutdowns.
- Self-Relieving Seats: Some models feature self-relieving seats that release pressure buildup behind the seat, preventing damage and ensuring consistent sealing performance.
Procurement Guidance & Trust Assurance
When selecting a forged steel trunnion mounted ball valve, prioritize:
- Material Compatibility: Match body, ball, and seat materials to your specific media and temperature conditions to avoid premature corrosion or wear.
- Pressure & Temperature Rating: Ensure the valve’s rating exceeds your maximum operating pressure and temperature to guarantee safety and reliability.
- Compliance: Verify the valve meets industry-specific standards (API 6D, ASME B16.34) and regulatory requirements (ISO 15848, API 607) for your application.
Our valves are manufactured under strict ISO 9001 quality control, with full material traceability and third-party inspection (API, TÜV, DNV) available upon request. Backed by a global service network, we provide technical support from initial design through installation and ongoing maintenance, ensuring your investment delivers reliable performance for decades.