SS 904L Plug Valve

SS 904L plug valve is a severe-service, quarter-turn rotary isolation valve constructed from high-alloy 904L super austenitic stainless steel (UNS N08904), engineered for absolute shutoff in highly aggressive, non-lubricated chemical processes. Containing 24% to 26% nickel and 4% to 5% molybdenum, the 904L metallurgy delivers elite resistance to chloride pitting, crevice corrosion, and stress corrosion cracking (SCC), vastly outperforming standard 316L in handling strong, hot reducing acids such as sulfuric and phosphoric acids. The valve features a tapered or cylindrical plug that rotates inside a high-performance PTFE sleeve, providing a large, continuous sealing area with tight sealing performance. Chemical process engineers and refinery procurement managers can eliminate acid corrosion risks and minimize maintenance downtime by importing certified SS 904L plug valves directly from specialized manufacturers in China via our advanced B2B commercial platform.