Industrial process systems require reliable valves for handling corrosive fluids, particularly where strong chemical resistance and dependable isolation are required. African Valve, an Alloy 20 Valves Manufacturer in South Africa, provides Alloy 20 valves designed to offer excellent resistance to aggressive chemical environments while providing reliable flow control and shut-off. These valves are suitable for demanding industrial applications where corrosion resistance, mechanical strength and long service life are required, particularly across chemical processing, pharmaceutical, food processing, power generation, mining and industrial process systems.
Alloy 20 Valves Features
Excellent corrosion resistance - Provides strong resistance to sulfuric acid and other aggressive chemical media.
High chemical resistance - Suitable for demanding chemical and process applications.
Reliable shut-off - Provides dependable isolation of process pipelines and equipment.
Good mechanical strength - Suitable for industrial pressure and temperature conditions.
Resistance to pitting and crevice corrosion - Helps improve performance in aggressive service environments.
Suitable for acidic service - Designed for applications involving corrosive and acidic process fluids.
Long service life - Alloy 20 construction supports durability under demanding operating conditions.
Actuation options - Available with manual, gearbox, pneumatic or electric operation depending on valve type and application requirements.
Technical Specifications
Parameter | Specification |
Valve Type | Alloy 20 Gate / Globe / Ball / Check / Butterfly Valve |
Application | Chemical / Pharmaceutical / Process Piping |
Size Range | Typically DN15 to DN600 or larger, depending on valve type |
Pressure Rating | PN10 / PN16 / PN25 / PN40 or ASME Class 150 / 300 |
End Connection | Flanged / Threaded / Socket Weld / Butt Weld, depending on valve type |
Operation | Handwheel / Lever / Gear Operated / Pneumatic / Electric Actuated |
Flow Direction | Bi-Directional or Uni-Directional, depending on valve design |
Temperature Range | Application dependent |
Testing | Pressure and Leakage Testing according to applicable standards |
Materials & Components
- Body: Alloy 20
- Bonnet: Alloy 20 / Compatible Corrosion-Resistant Alloy
- Disc: Alloy 20 / Stainless Steel / Compatible Alloy
- Ball: Alloy 20 / Stainless Steel, depending on design
- Stem: Alloy 20 / Stainless Steel
- Shaft: Alloy 20 / Stainless Steel
- Seat: PTFE / RPTFE / Graphite / Metal Seat
- Packing: Graphite / PTFE-Based Materials
- Gasket: PTFE / Graphite / Spiral Wound, depending on design
- Bearing: PTFE-Based Materials / Stainless Steel
- Fasteners: Stainless Steel / Alloy Materials as required
- Trim: Alloy 20 / Corrosion-Resistant Alloy
Applications
Alloy 20 valves are used in chemical processing plants, pharmaceutical manufacturing facilities, food processing systems, sulfuric acid handling systems, fertilizer plants, power generation facilities, mining operations, wastewater treatment, industrial process systems and other corrosive-service applications.
In South Africa, these valves are particularly relevant to chemical processing, mining, mineral processing, fertilizer production and industrial process infrastructure, where reliable pipeline isolation and resistance to aggressive process media are required. Alloy 20 construction helps provide enhanced corrosion resistance and supports longer service life in demanding chemical environments.
The corrosion-resistant alloy construction allows the valve to operate reliably when exposed to aggressive process fluids. Depending on the valve design, the valve can provide controlled flow, throttling or positive isolation of process lines and equipment. This makes Alloy 20 valves suitable for applications where conventional carbon steel or standard stainless-steel valve materials may not provide sufficient corrosion resistance.
Testing & Standards
Depending on the valve construction, pressure rating and connection configuration, applicable requirements may include API 600, API 602, API 608, API 609, API 594, API 598, ASME B16.34, ASME B16.5, ASME B16.10, EN 12516 and ISO 5208, where relevant to the specific valve design and project requirements.
Standard Alloy 20 Valve Products
Showing 1-22 of 22 Results
