4A National Standard Three-Way Ball Valve

Description

4A (ASTM A890 Grade 4A / CD3MN / 022Cr22Ni5Mo3N) is a ferritic-austenitic stainless steel that provides elite durability where standard alloys fall short:

• SCC Defense: The dual-phase microstructure offers inherent protection against chloride-induced stress corrosion cracking (SCC).
• Elite Corrosion Resistance: Exceptional resistance to pitting and crevice corrosion, specifically in seawater, brine, and acidic chemical environments.
• High Yield Strength: Roughly double the strength of 316L stainless steel, providing the structural integrity required to handle high pressure cycles and mechanical stress.

Features

• GB Standard Compliance: Fully compliant with GB/T 12237 (design), GB/T 9113 (flange), and GB/T 12221 (face-to-face), ensuring seamless integration into National Standard industrial piping.
• Space-Saving Efficiency: By replacing multiple two-way valves and tee-fittings with a single 4A three-way valve, users can reduce leak points and simplify system maintenance.
• Precision-Ground Ball: The 4A duplex ball is precision-machined to ensure smooth rotation and a “bubble-tight” seal against RPTFE or PPL seats, even in high-cycle automation.
• Advanced Safety: Features a blow-out proof stem and anti-static design, making it safe for use in volatile chemical and petrochemical environments.
• Ease of Automation: The ISO 5211 mounting pad allows for direct installation of pneumatic or electric actuators for remote flow diversion and mixing.

Specifications

Applications

• Chemical Processing: Precise diversion and mixing of organic acids and chemical slurries.
• Marine & Offshore: Seawater cooling systems and ballast water management where space is limited.
• Desalination: Managing brine and treated water flow paths in RO plants.
• Industrial Automation: High-reliability switching in automated manufacturing and refining lines.