III. Structural Features

• Triple Eccentric Design: Building on double eccentric structure, a third angular eccentricity is added between the valve body centerline and conical seat sealing face. This ensures the disc’s sealing ring rapidly engages or disengages from the seat during operation, eliminating friction and squeezing between sealing surfaces—reducing wear and extending service life.
• Friction-Free Operation: The triple eccentric layout minimizes contact between the disc and seat during opening/closing, lowering operating torque and enabling smooth actuation even for large-diameter valves.
• Anti-Blowout Stem: Designed per API 609, the stem features a blowout-proof structure to prevent accidental dislodgement under high pressure, enhancing operational safety.
• Self-Lubricating Bearing: Custom bushings reduce actuation torque and prevent stem seizing during frequent operations, ensuring consistent performance over time.
• Robust Sealing: Metal-to-metal hard sealing surfaces are precision-machined for zero leakage; laminated sealing combines metal and flexible materials to adapt to thermal expansion and contraction, maintaining tightness across cycles.

IV. Manufacturing Processes

• Forged Body Construction: Adopts forging instead of casting to eliminate internal looseness and structural defects, enhancing body strength and resistance to axial forces—critical for high-pressure applications.
• Precision Machining: Sealing surfaces and eccentric components are CNC-machined to tight tolerances, ensuring the triple eccentric design functions as intended. Laminated seals undergo layered pressing to ensure uniform material distribution.
• Non-Destructive Evaluation (NDE): Optional NDE inspections (e.g., ultrasonic, radiographic testing) verify material integrity, especially for critical applications like nuclear power.
• Rigorous Testing: Each valve undergoes API 598-compliant testing, including hydrostatic shell tests (1.5×rated pressure), seat leakage tests (1.1×rated pressure), and operational cycle tests to validate zero leakage and durability.