300LB CF3 Stainless Steel Flanged ASME Globe Valve

Product Overview

The 300LB CF3 Stainless Steel Flanged ASME Globe Valve is a high-performance flow control valve engineered for medium-pressure (300LB/PN50) and corrosive applications, integrating the superior intergranular corrosion resistance of CF3 stainless steel with strict compliance to ASME standards. As an austenitic cast stainless steel (ASTM A351 CF3) — the cast equivalent of wrought 304L stainless steel — CF3 features an ultra-low carbon content (≤0.03%) that eliminates sensitization risks during welding, making it ideal for welded systems or thick-section components where post-weld heat treatment (PWHT) is impractical . Rated for 300LB (5.0 MPa / 725 psi) working pressure and equipped with ASME B16.5 flanged connections, this valve operates reliably in temperatures ranging from -196℃ to 425℃ (-320°F to 800°F), providing precise throttling, tight shutoff (API 598 Class IV), and long-term durability. Fully compliant with ASME B16.34 (design)、ASME B16.10 (structure length) and API 598 (testing) standards, it is widely trusted in chemical processing, pharmaceutical, food & beverage, and water treatment industries, excelling in handling high-purity, non-chloride corrosive media.

Core Product Features

1. Premium CF3 Stainless Steel Construction

Manufactured from ASTM A351 CF3 stainless steel (UNS S30403 cast equivalent), featuring a chemical composition of 17.0-21.0% chromium, 8.0-12.0% nickel, and ≤0.03% carbon . The ultra-low carbon content inhibits chromium carbide precipitation at grain boundaries during welding, eliminating intergranular corrosion risks — a critical advantage for welded piping systems or components where PWHT is unfeasible . Mechanical properties include tensile strength ≥485 MPa, yield strength ≥205 MPa, and elongation ≥35% , ensuring structural integrity under medium-pressure cycling. The material maintains excellent toughness in cryogenic conditions down to -196℃ and resists oxidation at temperatures up to 425℃, outperforming standard CF8 (304) stainless steel in welding-related applications.

2. ASME Standard Compliance

Fully adheres to ASME B16.34 (Valves—Flanged, Threaded, and Welded Ends) for design, pressure-temperature ratings, and material requirements . Complies with ASME B16.10 for structure length and ASME B16.5 for flanged connections, ensuring seamless integration into global industrial piping systems . Meets API 598 standards for inspection and testing, guaranteeing leak-free performance (API 598 Class IV) and interchangeability with ASME-compliant valves . The valve’s heavy-wall body design (per ASME B16.34) resists external impact and pressure surges, enhancing operational safety.

3. 300LB (PN50) Medium-Pressure Rating

Rated for working pressures up to 5.0 MPa (725 psi) at ambient temperatures, with pressure-temperature ratings strictly aligned to ASME B16.34 Standard Class requirements . 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, high-purity water pipelines, and pharmaceutical process systems . 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, with gasket compatibility for medium-temperature medium-pressure services.

5. Precise Flow Control & Tight Shutoff

Features a linear motion plug-and-seat design optimized for throttling and on-off service, with a cone-shaped valve disc that provides precise flow regulation . The valve disc and seat are precision-machined, with optional Stellite 6 overlay welding (hardness HRC ≥55) for enhanced wear, erosion, and high-temperature resistance . The metal-to-metal seal meets API 598 Class IV leakage standards, preventing media waste and environmental hazards in critical applications . The streamlined flow channel minimizes pressure drop while reducing cavitation and noise in medium-pressure systems .

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 (ASTM A479 F304L) ensures corrosion resistance and structural integrity, 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. The valve’s  (backseat) structure ensures reliable sealing during stem maintenance .

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 300LB CF3 Stainless Steel Flanged ASME Globe Valve is ideally suited for:

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

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

• Food & beverage industry (high-purity fluid transfer, corrosive cleaning agents)

• 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 300LB CF3 ASME Globe Valve?

✅ Superior Intergranular Corrosion Resistance: CF3’s ultra-low carbon content eliminates sensitization during welding, ideal for welded systems .

✅ ASME Standard Compliance: Meets ASME B16.34/B16.5/B16.10 standards for global compatibility and operational safety .

✅ Precise Flow Regulation: Globe valve design enables accurate throttling, ideal for pressure control and medium-pressure differential systems .

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

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

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

Order & Certification 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 High Pressure Globe Valve

A High Pressure Globe Valve is a precision control valve designed to regulate or stop the flow of liquids, steam, and gases in demanding industrial systems. It operates through a disc and seat arrangement that allows accurate adjustment of the flow path. Built with robust materials and reinforced internal components, the valve is capable of handling severe operating conditions. It is commonly applied in power generation facilities, refinery systems, chemical plants, and other processes requiring dependable flow control.

Why the High Pressure Globe Valve Matters

The High Pressure Globe Valve is essential for maintaining stable operation in systems exposed to elevated pressure and temperature conditions. Its design provides accurate throttling capability and reliable shutoff, helping to protect pumps, turbines, and other important equipment. Strong structural integrity enables the valve to resist thermal stress and pressure fluctuations. By ensuring smooth flow regulation and minimizing leakage risks, the valve supports safe and efficient industrial processes.

Common Product Types by High Pressure Globe Valve

Different types of High Pressure Globe Valves are available to suit various service requirements. Standard pattern designs are commonly selected for general flow regulation, while angle pattern valves are suitable for installations requiring directional changes. Y pattern valves provide reduced flow resistance and improved efficiency. Depending on the operating environment, valves may feature bolted bonnets, welded bonnets, or pressure seal bonnets. Manual, electric, pneumatic, and gear operated configurations are also widely used.

Key Advantages of High Pressure Globe Valve

The High Pressure Globe Valve offers excellent flow control accuracy and dependable sealing performance. Its durable body structure and wear resistant trim components contribute to long service life under severe operating conditions. The valve performs effectively in applications involving high temperature and pressure variations. Flexible actuation options allow easy integration into automated systems, while precision seating surfaces help reduce maintenance requirements and enhance operational reliability.

High Pressure Globe Valve Machine Structure and Core Stations

The manufacturing process begins with forging or casting major components such as the body, bonnet, stem, and disc using high strength materials. Core production stations include heat treatment, precision machining, and hardfacing processes to improve durability and sealing quality. Assembly stations install the stem, disc, packing components, and operating mechanism. Final operations involve pressure testing, leakage inspection, surface treatment, cleaning, marking, and packaging to ensure reliable performance and consistent dimensional accuracy.