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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.
Item No :
004Product Origin :
TianjinLead Time :
30daysStainless 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) | CF3(304L) | CF8(304) | CF3M(316L) | CF3M(316L) |
| C | ≤0.03 | ≤0.08 | ≤0.03 | ≤0.08 |
| Cr | 17.0-21.0 | 18.0-21.0 | 17.0-21.0 | 18.0-21.0 |
| Ni | 8.0-12.0 | 8.0-11.0 | 9.0-13.0 | 9.0-12.0 |
| Mo | - | - | 2.0-3.0 | 2.0-3.0 |
| Si | ≤2.0 | ≤2.0 | ≤1.5 | ≤1.5 |
| Mn | ≤1.5 | ≤1.5 | ≤1.5 |
≤1.5 |
All four materials have good casting properties and can be used to make valves and fittings with complex shapes. The operating temperature range is from low temperature to 450℃ (sub-high temperature). For temperatures exceeding this range, special heat-resistant steel must be selected.
| Component | Materials / Options |
|---|---|
| Disc | CF8 CF8M CF3 CF3M |
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: What is the operating temperature range for these stainless steel valve discs?
A: These stainless steel discs (CF8, CF8M, CF3, and CF3M) are highly versatile, capable of operating reliably from cryogenic temperatures up to 450°C (842°F). For applications exceeding this sub-high temperature threshold, specialized heat-resistant alloys must be selected.
Q2: How do I choose between CF8, CF8M, CF3, and CF3M for my application?
A: CF8 (304) is the standard choice for general water and air applications. CF3 (304L) has lower carbon, making it ideal if welding is required. CF8M (316) adds molybdenum for superior resistance to harsh corrosives like seawater. CF3M (316L) combines both, offering maximum corrosion resistance and excellent weldability.
Q3: Does the surface finish of the disc affect flow performance?
A: Yes, absolutely. Our stainless steel discs are precision-machined and highly polished to achieve a smooth surface finish. This streamlined profile significantly minimizes flow resistance, reduces pressure drop, and prevents medium buildup (scaling) on the disc over time.
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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