Specification

TIANYU Flange-End Floating Ball Valve: Reliable Flow Control for Industrial Pipelines

I. Product Overview

TIANYU flange-end floating ball valve is a versatile industrial flow control solution designed to regulate the flow of liquids, gases, and slurries in diverse pipeline systems. Characterized by its “floating” ball design—where the ball is not fixed to a trunnion but instead relies on media pressure to seal against the seat—this valve combines simplicity, durability, and efficient operation. Equipped with flange connections for secure integration into pipelines, it is engineered to handle a range of pressures and temperatures, making it suitable for industries such as petroleum, chemical processing, water treatment, power generation, and general manufacturing.

Crafted from high-quality materials (including carbon steel, stainless steel, and alloy steel) with precision-machined components, TIANYU’s floating ball valve ensures tight sealing, low pressure drop, and long service life. Whether used for on-off isolation or basic flow modulation, it delivers consistent performance in both routine and demanding operating conditions.

II. Key Attribute Specifications

A. Dimensional and Pressure Parameters

Nominal Diameter: Available in sizes from DN15 to DN300 (½ inch to 12 inches), accommodating flow rates from small-scale pipeline systems (e.g., DN15 for laboratory or instrumentation lines) to large industrial pipelines (e.g., DN300 for water distribution or oil transfer).
Pressure Rating: Designed to handle pressure classes including PN10 (1.0MPa), PN16 (1.6MPa), PN25 (2.5MPa), PN40 (4.0MPa), and ANSI Class 150 (2.0MPa), 300 (5.0MPa), 600 (10.0MPa). This range allows deployment in low-pressure water systems, medium-pressure chemical lines, and high-pressure oil and gas pipelines.
Temperature Range: Dependent on seat material:
- PTFE/RPTFE seats: -20℃ to 180℃, suitable for ambient and moderately high-temperature media (e.g., water, mineral oil).
- PPL (polyphenylene) seats: -20℃ to 260℃, ideal for hot oils or steam.
- Metal seats: -20℃ to 400℃, designed for high-temperature applications (e.g., superheated steam, molten wax).

B. Material Composition

Valve Body:
- WCB (Cast Carbon Steel): Cost-effective, high-strength option for non-corrosive media (water, steam, oil). Tensile strength 485–655MPa, suitable for general industrial use.
- CF8 (304 Stainless Steel): Contains 18–20% chromium and 8–10.5% nickel, offering excellent corrosion resistance to water, mild acids, and atmospheric conditions. Ideal for food processing, pharmaceutical, and coastal applications.
- CF8M (316 Stainless Steel): Adds 2–3% molybdenum to 304 stainless steel, enhancing resistance to chlorides, sulfides, and aggressive chemicals (e.g., seawater, brine, sulfuric acid).
- Alloy Steel (WC6/WC9): For high-temperature, high-pressure systems (e.g., power plant steam lines), with superior creep resistance at temperatures up to 540℃.
Ball and Stem:
- Ball: Machined from the same material as the body (or hardened alloy for abrasive media) to ensure compatibility and corrosion resistance. Surface finish Ra ≤ 0.8μm for tight sealing.
- Stem: 304/316 stainless steel or alloy steel, precision-ground to minimize friction and prevent leakage. Equipped with anti-blowout design to enhance safety.
Seat Material:
- PTFE (Polytetrafluoroethylene): Chemically inert, low friction, and self-lubricating. Ideal for clean, non-abrasive media (gases, solvents).
- RPTFE (Reinforced PTFE): PTFE reinforced with glass fiber or carbon, improving mechanical strength for higher pressures and abrasive media (e.g., low-solids slurries).
- PPL (Polyphenylene): Heat-resistant, wear-resistant, suitable for high-temperature oils and steam.
- Metal (316 Stainless Steel/Alloy): For high-pressure, high-temperature, or abrasive media (e.g., slurry, high-pressure steam). Metal-to-metal sealing ensures durability under extreme conditions.

C. Connection and Operation

Connection Type: Flange-end, conforming to international standards:
- ASME B16.5 (USA): For Class 150, 300, 600 flanges with raised face (RF) or flat face (FF) profiles.
- EN 1092-1 (Europe): For PN10, PN16, PN25, PN40 flanges with PN or Class designations.
  Flange connections distribute pressure evenly, ensuring leak-tight assembly and easy installation/removal without cutting pipelines.
Operation Mode:
- Manual: Lever handle (for small sizes, DN15–DN100) or handwheel (for larger sizes, DN125–DN300) with 90° rotation for quick on-off operation. Position indicator (open/closed) for visual confirmation.
- Actuated: Optional pneumatic, electric, or hydraulic actuators for automated control. Pneumatic actuators (double-acting or spring-return) offer fast response for process automation; electric actuators provide precise modulating control via 4–20mA signals.

Product Overview

III. Feature Description

A. Floating Ball Design for Reliable Sealing

The defining feature of this valve is its floating ball, which is not fixed to a trunnion but instead “floats” within the valve body. When media flows through the valve, pressure pushes the ball against the downstream seat, creating a tight seal. This self-centering design ensures uniform contact between the ball and seat, minimizing leakage (ANSI/FCI Class V for soft seals, Class IV for metal seals).

In low-pressure applications, spring-loaded seats compensate for insufficient media pressure, maintaining sealing integrity. For high-pressure systems, the floating design leverages media pressure to enhance sealing—making it suitable for both low and high-pressure scenarios without compromising performance.

B. Flange Connection for Secure Integration

Flange ends provide several advantages over threaded or welded connections:

Leak Resistance: Flange gaskets (e.g., spiral-wound, non-asbestos) create a robust seal, even under pressure fluctuations. The raised face (RF) flange profile enhances gasket compression, reducing the risk of leakage.
Ease of Maintenance: Flanges allow the valve to be removed from the pipeline without cutting, simplifying inspections, seat replacements, or actuator repairs. This is critical for minimizing downtime in continuous-process industries.
Scalability: Standard flange dimensions (ASME/EN) ensure compatibility with existing pipelines, enabling easy retrofitting or system expansion.

C. Low Pressure Drop and High Flow Efficiency

The full-port design (where the ball’s bore matches the pipeline diameter) minimizes pressure drop across the valve. When fully open, the ball’s unobstructed flow path allows media to pass with minimal turbulence, reducing energy consumption for pumps and compressors. This efficiency is particularly valuable in large-scale systems (e.g., water treatment plants, oil pipelines) where energy costs are significant.

D. Versatility in Media Handling

TIANYU’s floating ball valve adapts to diverse media:

Liquids: Water, oils, chemicals, and low-solids slurries (with RPTFE or metal seats).
Gases: Natural gas, nitrogen, compressed air, and corrosive gases (with 316 stainless steel and PTFE seats).
High-Temperature Media: Steam, hot oils, and molten materials (with PPL or metal seats).

Material customization ensures compatibility with aggressive substances (e.g., CF8M for chloride-rich media) or high-purity applications (e.g., electropolished 316 for pharmaceuticals).

IV. Manufacturing Processes

A. Material Selection and Testing

Raw Material Inspection: All materials (steel billets, stainless steel sheets) undergo spectral analysis to verify chemical composition (e.g., chromium/nickel content in 304/316) and mechanical testing (tensile strength, impact resistance) to meet standards like ASTM A216 (WCB) or ASTM A351 (CF8/CF8M).
Defect Detection: Billets and castings are inspected via ultrasonic testing (UT) and magnetic particle inspection (MPI) to identify internal cracks or porosity, ensuring structural integrity under pressure.

B. Precision Machining

Valve Body: CNC turning and milling machines shape the body, with flange faces machined to flatness tolerance ≤0.05mm/m and surface finish Ra ≤3.2μm for proper gasket seating. Internal flow paths are honed to minimize turbulence.
Ball and Seat: The ball is CNC-machined to spherical tolerance ≤0.02mm, then lapped to Ra ≤0.8μm for uniform contact with the seat. Seats are precision-molded (for PTFE/RPTFE) or machined (for metal) to match the ball’s curvature.
Stem and Actuator Mounting: Stems are ground to diameter tolerance h7 (±0.01mm) for smooth rotation. Actuator mounting pads (ISO 5211) are machined to ensure alignment with actuators.

C. Assembly and Sealing

Seat Installation: Seats are press-fitted into the body with retaining rings to prevent displacement. Soft seats (PTFE/RPTFE) are pre-loaded with springs to maintain contact with the ball; metal seats are welded or bolted for high-pressure applications.
Ball and Stem Assembly: The ball is connected to the stem via a keyway or spline, ensuring torque transmission without slippage. Stem packing (graphite or PTFE) is installed to prevent media leakage while allowing smooth rotation.

D. Quality Testing

Hydrostatic Test: The valve body is pressurized to 1.5× rated pressure with water for 30 minutes, checking for leaks or deformation.
Seat Leak Test: Under 1.1× rated pressure (air or water), leakage is measured to ensure compliance with ANSI/FCI Class V (≤0.1×DN mm³/min for soft seals) or Class IV (≤0.01% of rated flow for metal seals).
Operation Test: Manual or actuated valves undergo 100+ open-close cycles to verify smooth operation, with torque measurements recorded to ensure consistency.

Valve Details

V. Product Advantages

A. Reliable Sealing Performance

The floating ball design, combined with precision-machined seats, ensures tight sealing across pressure ranges. In chemical processing applications, TIANYU’s valve has demonstrated zero leakage during 5,000+ cycles, outperforming competitors with conventional ball designs.

B. Cost-Effective and Easy to Maintain

Lower Initial Cost: Compared to trunnion-mounted ball valves, the floating design eliminates trunnion components, reducing material and manufacturing costs—ideal for budget-conscious projects.
Simplified Maintenance: Flange connections and top-entry access (on select models) allow quick replacement of seats or stems without removing the valve from the pipeline, cutting maintenance time by 40% vs. welded valves.

C. Versatility Across Industries

With a wide range of materials and pressure/temperature ratings, the valve adapts to diverse applications:

In water treatment, WCB/PTFE valves handle potable water with minimal corrosion.
In oil and gas, CF8M/metal seat valves resist sour gas (H₂S) and high pressures.
In food processing, electropolished 304/PTFE valves meet FDA hygiene standards.

D. Energy Efficiency

Full-port design reduces pressure drop by 30–50% compared to globe valves, lowering pump energy consumption. In a municipal water distribution system, this translates to annual energy savings of $10,000+ for a DN300 pipeline.

Application

VI. Product Applications

A. Petroleum and Natural Gas

Upstream: Controls flow of crude oil and natural gas in wellhead gathering lines (CF8M/metal seats for sour service).
Midstream: Isolates sections of pipelines during maintenance or pigging operations (WCB/PTFE for cost-effectiveness).
Downstream: Regulates flow of refined products (gasoline, diesel) in refineries (316/PPL for high-temperature oils).

B. Chemical Processing

Batch Reactors: On-off control of raw materials (acids, solvents) with CF8/PTFE valves to prevent corrosion.
Slurry Handling: Manages low-solids slurries (e.g., lime slurry in water treatment) with RPTFE seats for wear resistance.
High-Pressure Systems: Controls flow in polymerization reactors with WC6/metal seat valves (Class 600, 300℃).

C. Water and Wastewater Treatment

Municipal Water Supply: Isolates pipeline sections or regulates flow with WCB/PTFE valves (PN16, DN100–DN300).
Industrial Wastewater: Handles corrosive effluents with 316/RPTFE valves, resisting chemicals like chlorine and sulfuric acid.

D. Power Generation

Cooling Water Systems: Controls flow of cooling water in thermal power plants with WCB/PTFE valves (PN25).
Steam Auxiliaries: Regulates low-pressure steam (≤180℃) in boiler feed systems with CF8/PPL valves.

E. Food and Pharmaceutical

Food Processing: Manages flow of ingredients (syrups, oils) with 304/PTFE valves, meeting 3-A sanitary standards.
Pharmaceutical Manufacturing: Controls high-purity water and solvents with electropolished 316/PTFE valves, ensuring no product contamination.

TIANYU flange-end floating ball valve: DN15–DN300, PN10–PN40/Class 150–600, with WCB/CF8/CF8M materials. Offers reliable sealing, low pressure drop, and easy maintenance for petroleum, chemical, water, and food industries.Customize with: 316L for extreme corrosion, metal seats for high temps, pneumatic/electric actuators, or sanitary polish. Tailored to your media, pressure, and control needs for optimal performance.

PN16 DN100 Flange-End Floating Ball Valve for water tank: Reliable Flow Control for Industrial Pipelines