III. Features Description

• Three Eccentric Structure: The disc, stem, and sealing surface are designed with three distinct eccentricities, eliminating contact between the disc and seat during opening/closing. This reduces wear, extends seal life, and achieves ANSI/FCI Class V leakage (near-zero) even after 1 million cycles—critical for asphalt and steam systems where leakage risks contamination or energy loss.
• Metal Hard Seal: Precision-machined metal sealing surfaces (Ra ≤0.8μm) form a tight bond under pressure, resisting deformation at high temperatures (up to 100°C). Unlike rubber seals, it avoids swelling or degradation in oil, asphalt, or chemical media.
• Electric Actuation Versatility: Equipped with three actuator types:
  • Switching type: Full open/close operation for on-off control in pipelines like water distribution.
  • Regulating type: Adjustable opening angle (0~90°) via signal input, ideal for precise flow control in chemical dosing systems.
  • Intelligent type: Integrated smart modules for temperature/pressure feedback, enabling automated process adjustment in complex loops.
• Stainless Steel Durability: SS304/316 body resists corrosion from water, steam, and mild chemicals, while its robust forging ensures structural integrity under PN6.4MPa pressure—eliminating rust-related failures in humid or industrial environments.
• Flange Connection: Bolted flange design ensures alignment with standard pipelines (DIN/ANSI), simplifying installation and reducing leakage risks compared to wafer-type valves in high-pressure applications.

IV. Manufacturing Processes

• Material Preparation: SS304/316 slabs undergo ultrasonic testing to detect internal defects. Spectral analysis verifies alloy composition (Cr18-20% for SS304; Cr16-18%, Mo2-3% for SS316) to ensure corrosion resistance.
• Three Eccentric Machining: CNC lathes precision-machine the disc, stem, and body to achieve three eccentricities (axial, radial, angular), with tolerances within ±0.03mm. This ensures the disc clears the seat during movement, minimizing friction.
• Seal Surface Finishing: Metal seal surfaces are ground with diamond abrasives to Ra ≤0.8μm, then lapped under 500N pressure to ensure 100% contact—critical for hard seal leakage performance.
• Actuator Integration: Electric actuators are mounted via a precision bracket, with stem-actuator alignment calibrated to ±0.5° to avoid jamming. Actuators undergo 5,000+ cycle tests to validate switching/regulating accuracy.
• Performance Testing:
  • Hydrostatic Test: Body tested at 1.5×rated pressure for 30 minutes to verify structural integrity.
  • Leakage Test: Metal seal tested with air at PN1.6MPa, achieving ANSI/FCI Class V leakage (≤0.001% of flow).
  • Cycle Test: 100,000+ open/close cycles to confirm durability of seals and actuator.