CF3 Stainless Steel 300LB Flanged API600 Gate Valve

Product Overview

The CF3 Stainless Steel 300LB Flanged API600 Gate Valve is a high-performance industrial shutoff valve engineered for corrosive, medium-pressure applications, combining the superior anti-corrosion properties of CF3 stainless steel with strict compliance to API 600 standards. As an austenitic cast stainless steel (ASTM A351) — the cast equivalent of wrought 304L stainless steel — CF3 features an ultra-low carbon content (≤0.03%) that eliminates sensitization and intergranular corrosion risks, even after welding or post-weld heat treatment (PWHT) is impractical . Rated for 300LB (PN50) pressure class and equipped with ASME B16.5 flanged connections, this valve operates reliably in temperatures ranging from -196℃ to 425℃ (-320°F to 800°F), delivering tight shutoff (API 598 Class IV) and minimal flow resistance. Widely trusted in chemical processing, food & beverage, pharmaceutical, and water treatment industries, it excels in handling non-chloride corrosive media, high-purity fluids, and cryogenic services.

Key Features & Advantages

1.Premium CF3 Stainless Steel Construction

Manufactured from ASTM A351 CF3 stainless steel, featuring a chemical composition of 17-21% chromium, 8-12% nickel, and ≤0.03% carbon . The ultra-low carbon content prevents chromium carbide precipitation at grain boundaries during welding, ensuring superior resistance to intergranular corrosion — critical for field-welded systems or thick-walled components where PWHT is unfeasible . CF3 offers excellent compatibility with organic acids, dilute nitric acid, high-purity water, and non-chloride corrosive media, with mechanical properties including tensile strength ≥485 MPa, yield strength ≥205 MPa, and elongation ≥30% . It also maintains toughness in cryogenic conditions down to -196℃, making it suitable for low-temperature applications.

2.API 600 Standard Compliance

Fully adheres to API 600 specifications for bolted bonnet steel gate valves, including heavy-wall body construction, full-port flow channels, rigid wedge disc design, and precise dimensional tolerances . Complies with API 598 (inspection and testing) and ASME B16.34 (pressure-temperature ratings), ensuring interchangeability with API 600-compliant valves and leak-free performance . The valve’s structure length meets ASME B16.10 standards, while flanged connections align with ASME B16.5, facilitating seamless integration into global industrial piping systems.

3.300LB (PN50) Pressure Class Rating

Rated for working pressures up to 5.0 MPa (725 psi) at ambient temperatures, with pressure-temperature ratings aligned to ASME B16.34 standards . At 300℃ (572°F), the valve retains a working pressure of 3.9 MPa (566 psi), ensuring stable performance in medium-pressure corrosive systems such as chemical process lines and high-purity water pipelines . The reinforced CF3 body and precision-engineered internal components handle pressure cycling without deformation or leakage.

4.ASME B16.5 Flanged Connections

Equipped with flanged ends per ASME B16.5 standards, available in RF (Raised Face) or RTJ (Ring Type Joint) configurations for secure, leak-proof installation . The flanged design enables easy assembly, disassembly, and maintenance, compatible with standard industrial flanges across sizes from 1/2" to 24" (DN15 to DN600) . Ideal for applications requiring frequent inspection or system modifications, the flanged connection ensures reliable sealing even in cyclic pressure conditions.

5.Reliable Shutoff & Flow Efficiency

Features a rigid wedge disc design with precision-machined seating surfaces, optionally overlay-welded with Stellite 6 for enhanced wear, erosion, and high-temperature resistance . The full-port flow channel minimizes pressure drop when fully open, optimizing energy efficiency for large-volume fluid transfer . The metal-to-metal seal meets API 598 Class IV leakage standards, preventing media waste and environmental hazards in critical applications. The valve’s bidirectional flow capability adapts to complex piping systems where fluid direction may change .

6.Robust & Low-Maintenance Design

Bolted bonnet construction with a backseat design allows in-line maintenance — inspection, repair, or replacement of internal components (stem, disc, seat) — without removing the valve from the pipeline . The one-piece forged 304L stainless steel stem ensures structural integrity and corrosion resistance, while the (rising stem) design provides visual confirmation of valve position for easy operation monitoring . All wetted parts are manufactured from CF3 or compatible corrosion-resistant materials, extending service life in harsh environments.

7.Wide Operating Temperature Range

Suitable for extreme temperature conditions from -196℃ (-320°F) to 425℃ (800°F) . The austenitic structure of CF3 stainless steel maintains toughness in cryogenic services (e.g., liquid nitrogen, LNG) and resists oxidation at high temperatures, adapting to diverse industrial environments from pharmaceutical cleanrooms to chemical reactors.

Technical Specifications

Applications

The CF3 Stainless Steel 300LB Flanged API600 Gate Valve is ideally suited for:

•Chemical & petrochemical processing (organic acids, dilute nitric acid, non-chloride corrosive media)

•Food & beverage industry (breweries, dairies, bottling plants — high purity, non-reactive)

•Pharmaceutical & biotechnology (sterile process lines, clean-in-place (CIP) systems)

•Water treatment (deionized water, municipal water systems, corrosion-free fluid transfer)

•Cryogenic services (liquid nitrogen, LNG, low-temperature fluid handling down to -196℃)

•Power generation (auxiliary systems, high-purity steam lines)

•Marine and offshore utilities (non-chloride corrosive environments)

Why Choose Our CF3 300LB API600 Gate Valve?

✅ Superior Corrosion Resistance: CF3’s ultra-low carbon content eliminates intergranular corrosion, ideal for welded systems and corrosive media .

✅ API 600 Reliability: Complies with global standards for consistent performance in critical industrial applications .

✅ 300LB Pressure Stability: PN50 rating handles medium-pressure systems, ensuring safe operation across temperature ranges .

✅ Versatile Temperature Adaptability: Operates from cryogenic -196℃ to 425℃, adapting to diverse 工况 .

✅ Easy Installation & Maintenance: ASME B16.5 flanged connections and bolted bonnet enable quick assembly and in-line service .

✅ High Purity Compatibility: Non-reactive CF3 material meets sanitary requirements for food, pharmaceutical, and high-purity applications.

Order Information

•Minimum Order Quantity (MOQ): 1 Unit

•Lead Time: 10-25 Working Days (Standard Sizes); Customized Orders: 25-40 Working Days

•Payment Terms: T/T (30% Advance + 70% Against B/L Copy), L/C, Western Union

•Shipping: Sea Freight (FCL/LCL), Air Freight, Express (DHL/FedEx/UPS)

•Packaging: Anti-corrosion Coating + Wooden Case + Custom Labeling (Meets Export Standards)

•After-Sales Service: 12-Month Warranty, Technical Support, Spare Parts Supply

•Certifications Provided: Material Mill Test Certificate (EN 10204 3.1), API 598 Test Report, ISO 9001 Certificate, FDA Compliance (for Sanitary Applications)

Contact our technical sales team for personalized quotes, 2D/3D drawings, ASTM A351 CF3 material certificates, or sample requests. We provide tailored corrosion-resistant valve solutions to meet your specific application needs.

What Is a CF3 Stainless Steel 300LB Flanged API600 Gate Valve

A CF3 Stainless Steel 300LB Flanged API600 Gate Valve is a corrosion resistant isolation valve designed for full open or full closed service in industrial pipelines. CF3 is a low carbon cast stainless steel that offers excellent resistance to oxidation and intergranular corrosion, especially after welding. The gate moves vertically to clear the flow path and minimize pressure loss. Flanged ends allow convenient installation, and API600 design requirements ensure dependable performance in critical process systems.

Why the CF3 Stainless Steel 300LB Flanged API600 Gate Valve Matters

This valve is important because it combines reliable shutoff with strong corrosion resistance in aggressive environments. The low carbon CF3 material helps maintain structural integrity and reduces the risk of weld related corrosion. The full bore design allows unrestricted flow when the valve is open, protecting process efficiency. API600 compliance provides confidence in material quality, dimensional consistency, and operational reliability in chemical, water treatment, and marine applications.

Common Product Types by CF3 Stainless Steel 300LB Flanged API600 Gate Valve

Common product types include rising stem outside screw and yoke gate valves, bolted bonnet gate valves, and flexible wedge gate valves. Solid wedge designs are selected for general service, while flexible wedges compensate for temperature changes and improve seat contact. Optional configurations include extended stems, locking devices, and special trim materials. Different seat facings are available to suit corrosive fluids and varying service conditions.

Key Advantages of CF3 Stainless Steel 300LB Flanged API600 Gate Valve

The valve offers excellent corrosion resistance, dependable bidirectional sealing, and minimal pressure drop when fully open. CF3 stainless steel is well suited for welded systems and high purity applications. Flanged connections simplify installation and maintenance. The robust wedge and seat design provides long service life, while API600 construction ensures consistent quality and reliable operation in demanding industrial environments.

CF3 Stainless Steel 300LB Flanged API600 Gate Valve Machine Structure and Core Stations

Production begins with precision casting of the body, bonnet, wedge, and related components in CF3 stainless steel. Core stations include solution treatment, CNC machining of flange faces, guide slots, stem threads, and sealing surfaces. Assembly stations install the wedge, stem, packing, bonnet, and handwheel. Final operations include seat lapping, pressure testing, cleaning, passivation, marking, and packaging to ensure corrosion resistance, dimensional accuracy, and leak tight performance.