5A National Standard Flange Ball Valve

Description

5A (ASTM A890 Grade 5A / CE3MN / 022Cr25Ni7Mo4N) is a super duplex stainless steel designed for environments where even standard duplex (4A) may reach its limits:

• Exceptional SCC Defense: The balanced dual-phase microstructure ensures the valve is virtually immune to chloride-induced stress corrosion cracking (SCC), making it essential for offshore and coastal industrial service.
• Elite Pitting Resistance: With a PREN (Pitting Resistance Equivalent Number) typically greater than or equal to 40, 5A provides maximum protection against localized corrosion in high-temperature seawater and concentrated brine.
• Maximum Mechanical Strength: Offers significantly higher yield strength and impact toughness than standard austenitic steels, allowing the valve body to withstand severe pressure cycles and mechanical fatigue.

Features

• GB Standard Compliance: Fully compliant with GB/T 12237 (design), GB/T 9113 (flange), and GB/T 12221 (face-to-face), ensuring perfect technical compatibility with standardized domestic infrastructure.
• Full Bore Design: The internal flow path matches the pipe’s diameter exactly. This eliminates flow restriction, prevents media buildup, and ensures negligible pressure drop across the valve.
• High-Precision Sealing: Features a mirror-polished 5A super duplex ball paired with high-performance seats (such as RPTFE or PPL). This combination ensures a “bubble-tight” seal even in high-frequency cycling.
• Safety & Reliability: Includes a blow-out proof stem, anti-static devices, and a robust fire-safe structural design to ensure operational safety in volatile petrochemical environments.
• Streamlined Actuation: The quarter-turn mechanism is designed for low-torque operation, supporting manual levers, gearboxes, or seamless integration with pneumatic and electric actuators.

Specifications

Applications

• Offshore & Marine: Seawater cooling, ballast systems, and offshore oil and gas production.
• Chemical Processing: Handling high-temperature organic acids, oxidizing chlorides, and acidic chemical slurries.
• Desalination: Critical high-pressure lines and brine handling in reverse osmosis (RO) plants.
• Power Generation: Chemical treatment and cooling water loops in coastal power facilities.