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This premium Stainless Steel Butterfly Valve Disc (available in 1.4408 austenitic, as well as 1.4462 and 1.4469 duplex/super duplex grades) is engineered to meet varying levels of corrosion resistance and pressure demands across diverse industries. Featuring a precision-machined and polished streamlined surface, it effectively minimizes flow resistance, prevents medium buildup, and pairs seamlessly with EPDM, NBR, and PTFE seats. Whether applied in generally corrosive environments like food and pharma (1.4408), high-chlorine marine and petrochemical scenarios (1.4462), or extreme acid and high-pressure conditions (1.4469), this disc series guarantees exceptional structural strength and long-lasting, leak-proof performance.
Item No :
006Product Origin :
TianjinLead Time :
30daysAustenitic stainless steel Valve Disc
Stainless steel disc is one of the most commonly used materials for concentric type butterfly valves, offering an excellent balance of corrosion resistance, strength, and cost-effectiveness.
| Element(%max) | 1.4408 | 1.4462 | 1.4469 |
| C | ≤0.07 | ≤0.03 | ≤0.03 |
| Cr | 18.0-20.0 | 21.0-23.0 | 24.0-27.0 |
| Ni | 9.0-12.0 | 4.5-6.5 | 6.0-8.0 |
| Mo | 2.0-2.5 | 2.5-3.5 | 3.0-5.0 |
| N | - | 0.08-0.20 | 0.12-0.22 |
| Mn | ≤1.5 | ≤2.00 | ≤1.00 |
| Si | ≤1.5 | ≤1.00 | ≤1.00 |
| P | ≤0.04 | ≤0.03 | ≤0.035 |
| S | ≤0.03 | ≤0.02 | ≤0.025 |
In terms of corrosion resistance and strength, 1.4469 > 1.4462 > 1.4408; however, in terms of material cost and processing difficulty, the opposite is true.
| Component | Materials / Options |
|---|---|
| Disc | 1.4408/1.4462/1.4469 |
1.Good corrosion resistance in air, water, and most neutral or mildly corrosive fluids.
2.High strength and durability, making it suitable for both industrial and marine applications.
3.Smooth surface finish, minimizing flow resistance and preventing medium buildup.
4.Compatibility with various seat materials (such as EPDM, NBR, or PTFE) for versatile service conditions.
5.Typical applications include water treatment, HVAC systems, general industry, shipbuilding, and chemical processes where moderate corrosion resistance is required.
Q1: How do I choose between 1.4408, 1.4462, and 1.4469 for my valve disc?
A: Selection depends on your operating environment and budget. 1.4408 is the standard choice for general corrosive media (water, food, pharma). 1.4462 (Duplex) provides superior strength and pitting resistance for high-chlorine and marine settings. 1.4469 (Super Duplex) is the ultimate solution for extreme acids and high-pressure applications, though it comes with higher material and machining costs.
Q2: Can these stainless steel discs handle high-temperature and high-pressure applications?
A: Yes. While the overall valve's temperature limit is often dictated by the soft seat material (like EPDM or PTFE), the metal discs themselves are highly resilient. The 1.4469 grade, in particular, is specifically engineered to maintain exceptional structural integrity and corrosion resistance in severe high-temperature and high-pressure environments.
Q3: Why is the surface finish of the disc important?
A: Our stainless steel discs are precision-machined to achieve a smooth, streamlined profile. This high-quality finish significantly minimizes flow resistance (reducing pressure drop) and prevents the buildup of scale or particulate matter, ensuring a reliable, long-lasting seal against the valve seat.
This premium Stainless Steel Butterfly Valve Disc (available in 1.4408 austenitic, as well as 1.4462 and 1.4469 duplex/super duplex grades) is engineered to meet varying levels of corrosion resistance and pressure demands across diverse industries. Featuring a precision-machined and polished streamlined surface, it effectively minimizes flow resistance, prevents medium buildup, and pairs seamlessly with EPDM, NBR, and PTFE seats. Whether applied in generally corrosive environments like food and pharma (1.4408), high-chlorine marine and petrochemical scenarios (1.4462), or extreme acid and high-pressure conditions (1.4469), this disc series guarantees exceptional structural strength and long-lasting, leak-proof performance.
This premium Stainless Steel Valve Disc is a core component for concentric butterfly valves. Available in CF8 (304), CF8M (316), CF3 (304L), and CF3M (316L), it offers an excellent balance of corrosion resistance, structural strength, and cost-effectiveness. The precision-polished, streamlined surface significantly minimizes flow resistance and prevents medium buildup. Capable of operating in a wide temperature range from cryogenic up to 450°C, it is widely utilized in water treatment, HVAC, chemical processing, and shipbuilding industries to fulfill various corrosion-resistance and weldability requirements.
This high-performance Aluminum Bronze Butterfly Valve Disc (available in C95400 and C95800) is specifically engineered for severe marine and highly corrosive fluid environments. The aluminum bronze material delivers exceptional resistance to seawater corrosion, pitting, and dezincification, while maintaining outstanding mechanical strength and impact resistance. Its precision-machined, streamlined profile minimizes flow resistance and ensures a perfect, zero-leakage seal when paired with elastomeric soft seats like EPDM, NBR, or Viton. It is an ideal core component for ballast water systems, desalination plants, fire-fighting networks, and industrial cooling systems handling high-salinity media.
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