Alloy 20 Butterfly Valve
High Performance • Durable • Leak Proof
Alloy 20 butterfly valve provides corrosion-resistant isolation for chemical process pipelines.
For corrosive process applications, Alloy 20 Butterfly Valve Suppliers in South Africa provide butterfly valves incorporating Alloy 20 for enhanced resistance to aggressive chemical media. Alloy 20, designated UNS N08020, is a nickel-iron-chromium alloy containing molybdenum and copper. The material is particularly suited to selected acid-handling and chemical services where resistance to pitting, crevice corrosion and chemical attack is required.
Butterfly Valves can provide compact quarter-turn isolation in chemical-transfer and process piping, with wafer, lug or flanged arrangements selected according to the pipline design.
Alloy 20 Butterfly Valve Components
- Body: Houses the disc and forms the primary pressure-containing structure.
- Disc: Rotates around the shaft to regulate or isolate the process flow.
- Stem/Shaft: Transfers operating movement to the disc.
- Seat: Forms the sealing interface around the disc.
- Packing: Helps prevent external leakage around the stem.
- Gaskets: Maintain pressure-tight sealing between connected components.
Alloy 20 Materials
Alloy 20 is an austenitic nickel-iron-chromium alloy developed for corrosion-resistant applications. African Valve identifies Alloy 20 as the body material, while trim options include Alloy 20, Stainless Steel, Duplex Stainless Steel, Monel, Inconel and Hastelloy. Seat options include PTFE, RPTFE and Metal Seat, with Flexible Graphite Packing and Graphite Gaskets available for sealing applications.