Integral Free Forging Power Station Gate Valve

Integral Free Forging Power Station Gate Valve: Engineered for Extreme-Duty Steam Isolation The Pinnacle of Power Plant Valve Integrity

Forged from a single ASTM A105 A182 F92 F11 F22 F304L F316Lchromium-molybdenum steel billet under 12,000-ton hydraulic pressure, this monobloc gate valve eliminates welds, porosity, and heat-affected zones (HAZ) – critical vulnerabilities in supercritical (580°C+/1,076°F+) and ultra-supercritical (620°C+/1,148°F+) steam systems. With ASME B16.34 Class 4500 certification (7,500 PSI), it delivers zero-leak isolation for main steam lines, turbine inlets, and boiler feed systems where valve failure triggers catastrophic plant downtime.

Unmatched Metallurgical Advantages

Homogeneous Grain Flow Alignment Directional grain structure follows stress contours via closed-die forging, boosting fatigue strength by 40% vs. cast equivalents (per ASME Section III ND-4220).

Eliminates intergranular corrosion in cyclic duty (50,000+ thermal cycles).

Creep Rupture Resilience

100,000-hour creep life at 625°C (1,157°F) – exceeds EN 10269 for power plant service.

Zero weld decay: Maintains yield strength >550 MPa at 600°C vs. cast valves’ 320 MPa degradation.

Critical Power Station Applications

Technical Specifications

Pressure Rating: ASME Class 2500/4500 (PN 420/760) | EN 12516-1 PN 400

Temperature: -29°C to 650°C (-20°F to 1,202°F)

Sizes: NPS 2" to 24" (DN 50 to DN 600)

Body Material: ASTM A105 A182 F91/F92 (Gr.91/92) /F11/F22/F304L/F316L/ ASTM A350 LF6 Cl.1 (Sub-zero)

Trim: 13CrMoV stem + CoCr-A (Stellite 21) seat hardfacing

Compliance: PED 2014/68/EU Cat. IV / NACE MR0175 / KTA 3201.2 (Nuclear)

Why Monobloc Forging Outperforms

When a 1,300MW coal unit experiences a turbine trip, steam line pressures surge to 5,000 PSI in <0.5 seconds. Cast valves fail at grain boundaries; welded valves crack at HAZ zones. Our integral forging’s isotropic structure absorbs shock loads – proven in 800+ emergency shutdowns without leakage.

They are widely usad in petroleum, chemical. thermal power plants to serve ol, water, steam in the pipes as opan and close device by connecting orcutting off the medium in the pipelines.