904L National Standard Flange Globe Valve

Description

904L (00Cr20Ni25Mo4.5Cu) is a high-alloy stainless steel engineered for severe chemical service:

• Unmatched Sulfuric Acid Resistance: The specific inclusion of Copper in the alloy grants it superior resistance to high concentrations of sulfuric acid, a condition where standard 316L would rapidly fail.
• Pitting & Crevice Protection: High concentrations of Molybdenum and Nickel ensure the valve remains stable and leak-proof in high-chloride environments.
• Stress Corrosion Cracking (SCC) Stability: The high nickel content provides a robust barrier against SCC, ensuring long-term structural integrity in volatile industrial settings.

Features

• Precision Throttling: Unlike gate valves, the globe valve is specifically designed for flow regulation. The short travel of the disc and the linear movement allow for highly accurate adjustments of fluid volume.
• High-Pressure Shut-off: The “S” shaped flow path allows the disc to close tightly against the seat, providing a reliable, high-integrity seal for hazardous or expensive chemical media.
• Standardized Compatibility: Fully compliant with GB/T 12233 (design), GB/T 9113 (flange), and GB/T 12221 (face-to-face), making it easy to integrate into existing National Standard piping systems.
• Durable Stem Construction: Features an Outside Screw and Yoke (OS&Y) design, keeping the stem threads away from the corrosive media to ensure smooth operation and easy lubrication.

Specifications

Applications

• Chemical Manufacturing: Controlling the flow of concentrated sulfuric, phosphoric, and acetic acids.
• Petrochemical Refining: High-chloride cooling water systems and aggressive catalyst management.
• Pollution Control: Flue gas desulfurization (FGD) systems where high-acid slurries are common.
• Pharmaceutical: High-purity acid handling where material integrity is critical to prevent batch contamination.