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Alloy 20 Valves

Alloy 20 Valves

African Valve is a trusted Alloy 20 Valves Manufacturer in South Africa, offering corrosion-resistant valve solutions designed to perform in environments with high concentrations of sulfuric acid, chlorides, and other aggressive chemicals. Engineered from austenitic nickel-iron-chromium alloy, Alloy 20 provides excellent resistance to pitting, stress corrosion cracking, and crevice corrosion, making it ideal for highly corrosive process applications.

Function & Working

Alloy 20 valves function like standard industrial valves but are built specifically to handle highly acidic or chloride-rich fluids. They regulate, isolate, or divert flow in chemical processing lines while ensuring corrosion protection and operational stability over time. Their metallurgy offers excellent mechanical strength and performance under fluctuating temperatures and pressures.

Advantages

  • Exceptional resistance to sulfuric acid and chloride corrosion

  • Ideal for handling nitric, phosphoric, and organic acids

  • Longer service life in corrosive conditions compared to stainless steel

  • Reduced maintenance costs in aggressive environments

  • Suitable for both high and low-pressure service

Industries Served

  • Chemical and Petrochemical Plants

  • Oil and Gas Refineries

  • Pulp and Paper Industry

  • Desalination Plants

  • Marine and Offshore Facilities

  • HVAC and Industrial Cooling

  • Fertilizer Manufacturing

Key Components

  • Valve Body – Constructed entirely from Alloy 20 for superior chemical resistance

  • Disc/Plug/Ball – Designed to maintain sealing under corrosive exposure

  • Stem – Alloy 20 shaft with optional coatings for enhanced wear resistance

  • Seats and Gaskets – PTFE or metal-seated options based on process needs

  • Bonnet – Bolted or pressure-sealed, depending on pressure class

  • Actuation Interface – Compatible with electric, pneumatic, or gear-operated actuators

Technical Specifications

  • Design Standards: ASME B16.34, API 6D, ASTM B462

  • Body Materials: Alloy 20 (UNS N08020), available in cast and forged configurations

  • Trim Options: Alloy 20, PTFE, Stellite, Monel

  • Pressure Ratings: Class 150 to 900 / PN10 to PN160

  • Size Range: DN15 to DN600

  • End Connections:

    • Flanged (ANSI B16.5, JIS, DIN)

    • Butt Weld (BW – Ideal for permanent, leak-proof service)

    • Socket Weld (SW – For compact, low-to-medium pressure systems)

    • Threaded (NPT – For smaller pipelines or skids)

  • Actuation Options: Available in manual, electric, or pneumatic configurations

  • Special Features:

    • High resistance to intergranular corrosion

    • Spark-safe and anti-static construction

    • Available with fire-safe and emission-compliant options

    • Engineered precision from a specialized Alloy 20 Valves Manufacturer in South Africa

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