III. Feature Description

• Dual-Plate Design: Two symmetric discs swing to open/close, reducing flow resistance compared to single-plate designs. The discs reset quickly to prevent water hammer, protecting pipeline equipment.
• Zero External Leakage: Integral body and precision machining ensure tight sealing, eliminating external leakage—critical for hazardous or high-value media.
• Versatile Installation: Lug-type connection allows installation in any orientation (horizontal, vertical, or inclined), adapting to limited space or complex pipeline layouts.
• Renewable Seals: Split discs and replaceable seals simplify maintenance; worn components can be replaced without replacing the entire valve, reducing lifecycle costs.
• Corrosion Protection: C95800 aluminum bronze resists saltwater, chemicals, and oxidation—ideal for marine, coastal, or chemical processing environments. Internal/external epoxy coating further enhances durability.

IV. Manufacturing Process

• Raw Material Inspection: C95800 aluminum bronze and other materials undergo chemical composition and mechanical property testing to meet standards.
• Rough Machining: CNC cutting shapes the valve body, lugs, and disc blanks, ensuring basic dimensions.
• Precision Polishing: Body inner walls and sealing surfaces are polished to Ra≤1.6μm, reducing flow resistance and ensuring tight sealing.
• Disc & Hinge Processing: Discs are machined to strict tolerances; hinges (pins) are heat-treated for wear resistance, ensuring smooth swing motion.
• Assembly: Discs, pins, and seals are assembled with precision alignment, testing swing flexibility to ensure quick response to flow changes.
• Pressure Testing: Each valve undergoes API 598 tests—hydrostatic shell test (1.5× nominal pressure) and seat leakage test (1.1× nominal pressure)—to verify no leakage.