Engineered for the most critical isolation and flow control applications in supercritical and ultra-supercritical power generation, the 2500LB Electrically Actuated API 600 Pressure Seal Die-Forged Globe Valve represents the ultimate solution for high-temperature and high-pressure steam systems.
Unlike conventional cast valves, this globe valve features a die-forged body, eliminating casting defects and providing superior structural integrity under extreme thermal cycling. Designed specifically for power stations, the pressure seal bonnet utilizes internal system pressure to dynamically enhance sealing integrity as pressure increases. Coupled with a smart electric actuator, this valve ensures precise flow regulation, zero-leakage isolation, and reliable operation in extreme high-pressure environments up to Class 2500.
Key Features & Benefits
• Die-Forged Steel Construction: Manufactured from a single piece of high-grade die-forged steel (e.g., ASTM A105 / F22 / F91). The continuous grain flow provides unmatched tensile strength, fatigue resistance, and leak-tight reliability in high-pressure steam service.
• Pressure Seal Bonnet Design: Utilizes a self-energizing pressure seal structure. As internal steam pressure increases, the sealing force increases proportionally, ensuring zero leakage even during rapid startup and shutdown transients in Class 2500 systems.
• Smart Electric Actuation: Equipped with multi-turn electric actuators featuring smart positioning, torque protection, and remote DCS/PLC integration. Ideal for automated, unattended power plant operations requiring precise flow control.
• Stellite Hard-Faced Trim: Seat rings and disc seating surfaces are overlaid with Stellite 6 (Co-Cr-W alloy) to resist severe erosion, corrosion, and galling in high-temperature steam flows up to 600°C.
• API 600 & ASME Compliance: Designed and manufactured strictly to API 600 and ASME B16.34 standards, ensuring dimensional compatibility, structural safety, and reliable performance in global power infrastructure.
Technical Specifications
Parameter | Specification |
Valve Type | Pressure Seal Die-Forged Globe Valve |
Design Standard | API 600, ASME B16.34, E101 |
Body Material | ASTM A105, A182 F22, A182 F91 (Die-Forged) |
End Connection | Butt Weld (BW) per ASME B16.25 |
Pressure Rating | Class 2500 (PN 420) |
Size Range | 2" to 10" (DN50 - DN250) |
Temperature Range | -29°C to +600°C |
Actuation | Multi-turn Electric Actuator (Ex-proof / IP68) |
Testing & Inspection | API 598, NACE MR0175 (Sour Service Available) |
Applications
This high-performance forged globe valve is widely deployed in:
• Thermal Power Plants: High-pressure feedwater control, main steam bypass, and boiler drain systems.
• Supercritical/ Ultra-Supercritical Units: High-temperature and high-pressure steam flow regulation and isolation.
• Nuclear Power Facilities: Non-nuclear auxiliary steam and water control systems.
• Heavy Industrial Boilers: High-pressure steam generation and distribution networks.
FAQ Section
Q: Why choose a die-forged body over a cast body for high-pressure globe valves?
A: Die-forged valves are shaped under extreme pressure, which aligns the grain structure and eliminates porosity, shrinkage, and inclusions common in castings. This results in superior mechanical strength, better resistance to thermal fatigue, and higher safety margins in extreme Class 2500 power station applications.
Q: How does the pressure seal bonnet work in high-temperature environments?
A: Unlike traditional bolted bonnets, the pressure seal design uses the internal media pressure to push the seal ring against the bonnet and body. The higher the system pressure, the tighter the seal becomes. This prevents the bolt-creep issues often seen in high-temperature thermal cycling.
Q: Can the electric actuator be integrated with our plant's DCS system?
A: Yes. We supply valves with premium multi-turn electric actuators that support 4-20mA feedback, Modbus/Profibus communication, and remote limit/torque monitoring, ensuring seamless integration into modern power plant Distributed Control Systems (DCS).
