TIANYU Stainless Steel Floating Ball Valve: Full Port 2PC Flange-Connected Valve with Fire-Safe & Anti-Static Design for Oil, Gas, and Industrial Media Control

I. Product Overview

TIANYU stainless steel floating ball valve is a precision-engineered flow control solution designed to meet the rigorous demands of oil, gas, chemical, and industrial applications. As a two-piece (2PC) floating ball valve with full port design, it delivers unobstructed flow, reliable sealing, and robust performance in corrosive, high-pressure, and mission-critical environments. Constructed from premium stainless steel alloys (CF8/CF8M equivalent to 304/316 stainless steel), this valve adheres to international standards including API 608, API 6D, and ASME B16.34, ensuring seamless integration with global industrial pipelines.

The flange connection (RF/RTJ) enables secure installation, while the floating ball design leverages media pressure to achieve bubble-tight sealing (ANSI/FCI Class VI). Equipped with optional fire-safe and anti-static features, it addresses safety concerns in hazardous environments—making it a trusted choice for oil and gas transmission, chemical processing, and industrial fluid management. Whether isolating media, regulating flow, or ensuring system integrity, this valve embodies durability, precision, and operational reliability.

II. Key Attribute Specifications

A. Dimensional & Pressure-Temperature Parameters

Port Size: Ranging from ½” to 8” (DN15 to DN200), covering small to medium-scale industrial pipeline requirements. The full port design ensures the valve’s internal diameter matches the pipeline, minimizing pressure drop and maximizing flow efficiency for applications requiring high throughput.
Pressure Rating: Class 150 to Class 600 (PN16 to PN100), accommodating low to high-pressure operating conditions. This versatility makes it suitable for both general industrial use and critical high-pressure systems like oil and gas transmission lines.
Temperature Range: -20℃ to 200℃ (extendable to -40℃ with low-temperature materials), enabled by compatible seat materials (PTFE, RPTFE, PPL, PEEK) and stainless steel’s thermal stability. The range supports cryogenic fluids, ambient media, and moderately heated industrial processes.

B. Material Composition

Valve Body & Bonnet: Stainless steel (CF8/CF8M/A351, equivalent to 304/316 stainless steel) as standard, with optional WCB carbon steel or low-temperature alloys (LCB/LCC) for specialized applications. CF8M (316 stainless steel) offers superior corrosion resistance to chlorides, acids, and alkalis, ideal for coastal or chemical-rich environments.
Ball: Solid stainless steel (matching body material) with precision-ground surface finish, ensuring uniform contact with the seat for reliable sealing. The ball’s floating design allows it to shift under media pressure, enhancing seal tightness.
Valve Stem: 304/316 stainless steel or 17-4PH alloy, featuring an anti-blowout design to prevent stem ejection under pressure. The material resists corrosion and mechanical wear, ensuring long-term operational safety.
Seat/Seal Materials: PTFE (polytetrafluoroethylene) for general industrial media, RPTFE (reinforced PTFE) for enhanced durability, PPL (poly-phenylene sulfide) for high-temperature applications, and PEEK (polyether ether ketone) for extreme pressure and chemical resistance.
Gaskets & Packing: Metal gaskets for body-bonnet sealing, preventing leakage due to vibration or temperature fluctuations. PTFE-impregnated packing ensures stem sealing integrity while reducing friction during operation.

C. Connection & Operational Features

Connection Type: Flange ends (RF/RTJ/BW) conforming to ASME B16.5/ASME B16.47 standards. The RF (Raised Face) flange is suitable for general applications, while RTJ (Ring Type Joint) flanges provide enhanced sealing for high-pressure/high-temperature systems.
Operation Mode: Manual (hand wheel/worm wheel) as standard, with optional pneumatic or electric actuation for automated control. Worm wheel operators reduce torque requirements for larger valves, enabling easy manual operation, while actuators support remote monitoring and integration with SCADA/DCS systems.
Safety Features: Optional fire-safe design and anti-static protection. The fire-safe structure ensures metal-to-metal sealing between the ball and body if non-metallic seats burn in a fire, preventing catastrophic media leakage. Anti-static devices discharge static electricity, mitigating explosion risks in flammable media applications.

D. Certifications & Compliance

Industry Standards: API 608, API 6D, ASME B16.34, ASME B16.10, BS 5351.
Material Certifications: ASTM A351 (stainless steel), ASTM A216 (WCB), ISO 9001.
Regional Approvals: CE, ATEX (for hazardous environments), FDA (optional for food-grade applications).

III. Feature Description

A. Floating Ball Design: Self-Enhancing Sealing Performance

The floating ball design is a defining feature of this valve, setting it apart from trunnion-mounted alternatives. Unlike fixed trunnion balls, the floating ball is not anchored to the stem—instead, it “floats” within the valve body, shifting under the pressure of the media. This movement presses the ball firmly against the downstream seat, creating a tight seal that improves with increasing pressure.

In high-pressure oil pipelines, for example, the floating ball automatically adjusts to media pressure, maintaining leak-tight performance even during pressure spikes. This self-enhancing sealing mechanism eliminates the need for additional actuation force, reducing operational complexity and ensuring reliability in dynamic operating conditions.

B. Full Port Configuration: Maximizing Flow Efficiency

The full port design ensures the valve’s internal diameter is identical to the connected pipeline, eliminating flow restrictions. Unlike reduced port valves, which narrow the flow path and increase pressure drop, full port floating ball valves allow media to pass through with minimal resistance—ideal for applications requiring high flow rates, such as chemical transfer lines or oil distribution systems.

This design also simplifies pipeline cleaning and maintenance, as pigging (pipe cleaning) tools can pass through the valve unobstructed. In a refinery’s gasoline blending system, the full port design reduces pump energy consumption by up to 20% compared to reduced port valves, delivering long-term cost savings.

C. Two-Piece (2PC) Body Construction: Durability & Maintenance Ease

The two-piece body and bonnet design balances structural integrity with serviceability. The split construction allows the valve to be disassembled without removing it from the pipeline, simplifying maintenance tasks like seat replacement or stem packing adjustment. This is particularly valuable in confined spaces or remote installations where pipeline shutdowns are costly.

The body-bonnet connection uses a gasket seal reinforced by metal-to-metal contact, preventing leakage due to vibration, temperature changes, or pressure fluctuations. In industrial settings with frequent operational cycles, this robust connection ensures the valve maintains structural integrity for years, reducing unplanned downtime.

D. Fire-Safe & Anti-Static Features: Safety in Hazardous Environments

The optional fire-safe design addresses a critical risk in oil, gas, and chemical applications: seat failure during fires. If non-metallic seats (PTFE/PPL) burn, the floating ball shifts to make direct metal-to-metal contact with the valve body’s internal metal seat, forming a secondary seal that prevents massive media leakage. This design complies with API 607/API 6FA standards, minimizing fire spread and environmental damage.

Anti-static protection is another key safety feature, especially for flammable media. A conductive path between the ball, stem, and body discharges static electricity that builds up during operation, eliminating the risk of spark-induced explosions. In natural gas transmission lines, these features are not just optional—they are essential for regulatory compliance and operational safety.

E. Corrosion-Resistant Stainless Steel Construction

Stainless steel (CF8/CF8M) construction provides exceptional resistance to corrosion, pitting, and crevice damage. CF8 (304 stainless steel) is suitable for general industrial media like water, air, and mild chemicals, while CF8M (316 stainless steel) includes molybdenum for enhanced resistance to chlorides and aggressive chemicals.

In coastal desalination plants, for example, a CF8M floating ball valve resists corrosion from saltwater, maintaining performance for over a decade—whereas carbon steel valves would degrade within 2–3 years. The material’s durability also reduces maintenance costs, as the valve requires minimal cleaning or replacement of corroded components.

PN16 Stainless Steel Floating Ball Valve: Full Port 2PC Flange-Connected Valve with Fire-Safe & Anti-Static SS Ball Valve

IV. Manufacturing Processes

A. Material Inspection & Preparation

Raw Material Verification: Stainless steel billets (CF8/CF8M) undergo spectral analysis to confirm chemical composition (Cr: 16–18%, Ni: 10–12%, Mo: 2–3% for CF8M) and ultrasonic testing to detect internal defects. Mechanical testing (tensile, impact) ensures compliance with ASTM A351 standards.
Seat Material Testing: Seat materials (PTFE, RPTFE, PPL, PEEK) are tested for compression set, tensile strength, and chemical resistance to ensure compatibility with intended media and temperature ranges.

B. Valve Body & Bonnet Fabrication

Casting: Body and bonnet are produced via investment casting for stainless steel, ensuring dimensional accuracy and a smooth internal surface. Castings are solution-annealed to restore corrosion resistance and relieve internal stresses.
Machining: CNC turning and milling centers precision-machine the body, bonnet, and flange faces. Flange dimensions are machined to ASME B16.5 standards, with flatness tolerance ≤0.05mm/m and surface finish Ra ≤3.2μm for proper gasket seating. The body’s internal seat pocket is machined to exact tolerances to ensure uniform seat contact.

C. Ball & Stem Manufacturing

Ball Production: Solid stainless steel blanks are turned, ground, and lapped to achieve a mirror-like surface finish (Ra ≤0.2μm), critical for sealing performance. The ball’s diameter is precision-controlled to ensure a tight fit within the seat.
Stem Machining: Valve stems are CNC-machined from 316 stainless steel or 17-4PH alloy, with a surface treatment (polishing) to reduce friction and enhance corrosion resistance. The anti-blowout feature is integrated during machining, ensuring the stem cannot be ejected under pressure.

D. Assembly & Quality Testing

Component Assembly: The ball, stem, seat, and packing are assembled into the body-bonnet assembly. The seat is press-fitted into the body pocket, with spring loading to compensate for thermal expansion and wear. The bonnet is secured with studs and nuts, with the gasket compressed to form a leak-tight seal.
Hydrostatic Testing: The valve undergoes shell testing at 1.5× rated pressure and seat testing at 1.1× rated pressure, with no leakage allowed. For gas service, pneumatic testing is performed to confirm bubble-tight sealing.
Operational & Safety Testing: The valve is cycled 100 times to verify smooth operation and torque consistency. Fire-safe testing (per API 607) and anti-static testing are conducted for valves with these features, ensuring compliance with safety standards.
Traceability & Documentation: Each valve is marked with a unique serial number for material traceability. Test reports, material certificates, and compliance documents (API 608/API 6D) are provided with every unit.

V. Product Advantages

A. Superior Sealing Reliability

The floating ball design and precision-ground ball ensure ANSI/FCI Class VI leakage performance, eliminating media loss in critical applications. The self-enhancing seal improves with pressure, making it ideal for high-pressure systems where leakage could lead to safety hazards or costly downtime.

B. Flow Efficiency & Energy Savings

The full port design minimizes pressure drop, reducing pump energy consumption by up to 20% compared to reduced port valves. For facilities with multiple valves, this translates to significant annual energy savings while maintaining high flow rates for efficient process operation.

C. Durability in Harsh Environments

Stainless steel construction resists corrosion, pitting, and wear, extending the valve’s service life to 8–12 years in industrial settings. The robust two-piece design withstands vibration, temperature fluctuations, and cyclic operation, reducing maintenance and replacement costs.

D. Safety Compliance for Hazardous Applications

Optional fire-safe and anti-static features meet API 607/ATEX standards, mitigating risks in flammable or explosive environments. This compliance ensures regulatory adherence and protects personnel, equipment, and the environment from potential accidents.

E. Versatile Installation & Maintenance

Flange connections (ASME B16.5) ensure compatibility with standard pipelines, simplifying installation and retrofitting. The two-piece design allows in-line maintenance, eliminating the need for full pipeline shutdowns and reducing downtime.

F. Broad Application Compatibility

With a wide range of pressure, temperature, and material options, the valve adapts to diverse media—including oil, gas, chemicals, water, and steam. This versatility eliminates the need for multiple valve types, streamlining inventory management and procurement.

VI. Product Applications

A. Oil & Gas Industry

Upstream Exploration: Controls flow of crude oil, natural gas, and drilling fluids in wellheads and production lines. The fire-safe and anti-static features are critical for offshore and onshore drilling platforms.
Midstream Transmission: Regulates flow in pipelines transporting crude oil, refined products, or natural gas. The high-pressure rating (Class 600) and corrosion resistance make it suitable for long-distance transmission lines.
Downstream Refining: Manages flow of hydrocarbons, solvents, and steam in refinery units. The full port design supports high flow rates in gasoline blending and distillation systems.

B. Chemical Processing

Acid/Alkali Handling: Controls flow of sulfuric acid, hydrochloric acid, sodium hydroxide, and other corrosive chemicals. CF8M stainless steel and PTFE/PEEK seats ensure chemical inertness and long-term reliability.
Solvent & Petrochemical Processing: Regulates flow of organic solvents, monomers, and petrochemical intermediates. The fire-safe design minimizes risks in flammable solvent applications.

C. Water & Wastewater Treatment

Desalination Plants: Handles seawater and brine in reverse osmosis systems. CF8M stainless steel resists chloride-induced corrosion, ensuring durability in coastal environments.
Industrial Wastewater: Manages flow of corrosive effluents in manufacturing facilities. The robust construction withstands abrasive solids and chemical-rich wastewater.

D. Power Generation

Thermal Power Plants: Controls flow of steam, cooling water, and lubricating oils in boilers, turbines, and auxiliary systems. The high-temperature tolerance (up to 200℃) supports continuous operation.
Nuclear Power Auxiliaries: Regulates flow of cooling water and process fluids in non-radiation zones. Stainless steel construction ensures compliance with strict safety and corrosion standards.

E. General Industrial Applications

Pharmaceutical Manufacturing: With FDA-compliant PTFE seats, the valve handles sanitized process fluids and APIs (Active Pharmaceutical Ingredients) in sterile environments.
Food & Beverage: Controls flow of food-grade media (juices, dairy, beverages) with non-toxic seals, ensuring product purity.
Marine & Offshore: Manages seawater, fuel, and hydraulic fluids in ships and offshore platforms. Corrosion-resistant materials withstand saltwater exposure and harsh marine conditions.

VII. Summary & Customization

TIANYU stainless steel floating ball valve delivers reliable sealing, flow efficiency, and safety for oil, gas, chemical, and industrial applications. Its full port design, two-piece construction, and corrosion-resistant materials ensure durability and performance, backed by API/ASME standards.

Customize with 316L/2205 duplex steel for extreme corrosion, low-temperature alloys (LCB/LCC) for cryogenic use, electric/pneumatic actuators for automation, or fire-safe/anti-static features for hazardous environments. Tailor port size, pressure rating, and seat material to your media and operational needs for optimal performance.

PN16 Stainless Steel Floating Ball Valve: Full Port 2PC Flange-Connected Valve with Fire-Safe & Anti-Static SS Ball Valve