Engineered for demanding corrosive environments, the 600LB Flanged CF3 API 603 Corrosion-Resistant Gate Valve provides exceptional reliability in chemical and petrochemical processing.
Manufactured from high-grade ASTM A351 CF3 stainless steel (ultra-low carbon 304L equivalent), this valve offers superior resistance to intergranular corrosion, making it ideal for handling nitric acid and other aggressive media. Designed strictly to API 603 standards, it features a robust bolted bonnet, Outside Screw and Yoke (OS&Y) design, and metallic seating surfaces. With a full port opening and standard flanged connections (ASME B16.5), this Class 600 gate valve ensures smooth flow, reliable sealing, and long-term durability in critical isolation applications.
Key Features & Benefits
• CF3 Stainless Steel Construction: Crafted from premium CF3 cast stainless steel, providing excellent corrosion resistance, particularly against nitric acid and weakly corrosive liquids, without the risk of intergranular corrosion.
• API 603 & Bolted Bonnet Design: Manufactured to strict API 603 standards for corrosion-resistant bolted bonnet gate valves, ensuring reliable sealing and easy maintenance access.
• OS&Y Rising Stem Mechanism: Features an Outside Screw and Yoke design with a non-rotating rising stem, providing a clear visual indication of valve position and protecting stem threads from corrosive media exposure.
• Metallic Seating Surfaces: Equipped with durable metallic seat rings and wedge surfaces to withstand high temperatures and prevent galling in demanding chemical processes.
• Full Port Flow Area: The full bore design matches the pipeline diameter, minimizing flow resistance, reducing pressure drop, and facilitating pipeline pigging operations.
• Flanged End Connections: Compliant with ASME B16.5 standards, ensuring easy installation, secure sealing, and leak-proof performance in Class 600 piping systems.
Technical Specifications
Parameter | Specification |
Valve Type | Corrosion-Resistant Flanged Gate Valve |
Design Standard | API 603, ASME B16.34 |
Body Material | ASTM A351 CF3 (Stainless Steel) |
End Connection | Flanged (RF/RTJ) per ASME B16.5 |
Pressure Rating | Class 600 (PN100) |
Size Range | 2" to 24" (DN50 - DN600) |
Temperature Range | -29°C to +200°C |
Trim Material | CF3, F304L, or Stellite Hard-Faced |
Operation | Manual Handwheel / Gear Operator |
Testing & Inspection | API 598 |
Applications
This high-performance CF3 flanged gate valve is widely deployed in:
• Chemical Processing: Handling nitric acid, acetic acid, and other corrosive or oxidizing media.
• Petrochemical Plants: Corrosive fluid isolation and distribution systems.
• Pharmaceutical Industry: High-purity and corrosive chemical processing lines.
• Fertilizer Manufacturing: Aggressive chemical handling and isolation.
• Water Treatment: Seawater and corrosive wastewater systems.
FAQ
Q: What does CF3 mean in stainless steel gate valves?
A: CF3 refers to ASTM A351 Grade CF3, which is an ultra-low carbon austenitic stainless steel casting equivalent to 304L. It is specifically designed to resist intergranular corrosion after welding or high-temperature exposure, making it ideal for nitric acid and weakly corrosive media.
Q: What is the difference between API 600 and API 603 gate valves?
A: API 600 covers general steel gate valves (typically carbon steel like WCB) for oil and gas applications. API 603 is specifically designed for corrosion-resistant bolted bonnet gate valves made from stainless steel (like CF8, CF3, CF8M) for use in chemical and petrochemical industries.
Q: Why choose a flanged connection for Class 600 valves?
A: Flanged connections (per ASME B16.5) provide a secure, leak-tight seal that can be easily disassembled for maintenance or inspection. For Class 600 valves, Raised Face (RF) or Ring Type Joint (RTJ) flanges ensure reliable sealing under high-pressure corrosive conditions.
