TIANYU DN65 Flanged Manual and Power-Operated Ball Valve for Industrial Flow Control Applications

I. Product Overview

TIANYU DN65 flanged manual and power-operated ball valve is a versatile industrial valve engineered for precise flow control in medium-pressure pipelines. Designed with a floating ball structure and flanged connections, this valve accommodates both manual (handwheel/lever) and power actuation (pneumatic/electric) to suit diverse operational needs. Constructed from robust materials such as cast steel (WCB) or stainless steel (CF8/CF8M), it ensures durability and corrosion resistance across applications involving water, oil, gas, steam, and mild chemicals. Ideal for industries like petroleum, chemical processing, municipal water treatment, and HVAC, this valve delivers reliable shutoff, minimal flow resistance, and adaptability to varying temperatures and pressures—critical for systems where uptime and efficiency are paramount.

II. Key Attributes and Specification Parameters

Basic Attributes

Structure Design: Two-piece floating ball valve with a full-port design, where the ball’s bore matches the pipeline diameter to minimize pressure drop. The floating ball relies on line pressure to enhance sealing against PTFE or metal seats, ensuring tight shutoff.
Body Material: Cast steel (ASTM A216 WCB) for general industrial applications or stainless steel (ASTM A351 CF8/CF8M) for corrosive environments. CF8 (304 stainless steel) offers resistance to water, steam, and mild chemicals, while CF8M (316 stainless steel) provides enhanced protection against chlorides and harsh media.
Sealing System: Soft seal (PTFE/RTFE) or metal seal (Stellite/tungsten carbide) options. PTFE seals deliver bubble-tight shutoff (near-zero leakage) for clean media, while metal seals withstand high temperatures (up to 425℃) and abrasive particles.
Pressure Rating: PN16 (1.6MPa) to PN40 (4.0MPa), suitable for medium to high-pressure industrial systems.
Temperature Range: -29℃ to 175℃ with PTFE seals; extended to 425℃ with metal seals, accommodating both low-temperature fluids (e.g., chilled water) and moderately heated media (e.g., saturated steam, hot oil).
Nominal Diameter: DN65 (2.5”), catering to medium-diameter pipeline requirements for balanced flow rates.
Connection Type: Flanged ends conforming to ASME B16.5 (Class 150/300) and DIN PN16/PN40 standards, ensuring compatibility with global pipeline flanges. Flanges feature precision-drilled bolt holes for secure, leak-free installation.
Operation Modes: Manual (handwheel/lever) or power actuation (pneumatic/electric). Manual operation offers direct control, while power actuation enables remote operation and integration into automated systems.
Media Compatibility: Versatile for clean water, raw water, mineral oil, natural gas, LPG, steam, and mild chemicals (pH 4–10), making it suitable for a wide range of industrial and municipal uses.
Design Standards: Complies with API 6D (pipeline valves), ASME B16.34 (valves—flanged, threaded, and welding end), and EN 12266 (industrial valves—shell and seat test), ensuring adherence to domestic and international quality and safety norms.

Product Overview

III. Product Features

TIANYU DN65 flanged ball valve integrates advanced engineering with practical functionality:

Full-Port Flow Efficiency: The full-port design ensures the ball’s bore matches the pipeline diameter, minimizing pressure drop and maximizing flow capacity. This is critical for applications like water distribution or oil transfer, where efficient fluid movement reduces energy consumption.
Dual Actuation Flexibility: Compatible with both manual and power actuation, the valve adapts to diverse operational scenarios—from manual on-site adjustments to automated process control in large facilities.
Corrosion Resistance: Cast steel (WCB) and stainless steel (CF8/CF8M) constructions resist corrosion, pitting, and crevice corrosion—even in outdoor, coastal, or chemical environments. Stainless steel variants excel in marine or high-salt applications.
Reliable Sealing Performance: PTFE soft seals offer exceptional chemical resistance and low friction, achieving API 598 Class VI leakage rates (near-zero leakage) for liquid media. Metal seals provide a robust backup for high-temperature or abrasive conditions, ensuring long-term sealing integrity.
Flanged Connection Versatility: ASME B16.5 and DIN PN16/PN40 flanged connections allow easy integration into existing pipelines, with uniform pressure distribution that reduces leakage risks compared to threaded valves.
Fire-Safe Design: Optional fire-safe construction (per API 607) ensures seal integrity during high-temperature events, enhancing safety in hazardous environments (e.g., oil refineries, chemical plants).
Low Maintenance Design: The valve’s modular construction allows for easy disassembly and seal replacement without removing the entire valve from the pipeline. Stainless steel components require minimal upkeep, reducing lifecycle costs.

IV. Manufacturing Process

TIANYU adheres to strict manufacturing protocols to ensure the quality and performance of its DN65 ball valves:

Material Selection and Testing: Raw materials (WCB, CF8, CF8M) undergo chemical composition analysis and mechanical testing (tensile strength, elongation) to verify compliance with ASTM standards. Each batch is inspected for corrosion resistance via salt spray testing (for stainless steel variants).
Precision Casting: Valve bodies and bonnets are produced via investment casting (lost wax process) to achieve a smooth surface finish (Ra ≤1.6μm) and dimensional accuracy. This process eliminates internal defects like porosity, critical for pressure-containing components.
CNC Machining: The ball is precision-ground to a mirror finish (Ra ≤0.8μm) to ensure proper seating against seals. Valve seats are machined to tight tolerances (±0.02mm) to match the ball’s contour, with PTFE seals bonded using high-temperature adhesive.
Assembly and Calibration: The floating ball is assembled with guided seats, ensuring vertical alignment. Actuators (manual or power) are calibrated for smooth operation, with torque testing to ensure easy control. Power actuation systems include position feedback for precise monitoring.
Testing and Quality Control: Each valve undergoes:
- Shell test: 1.5×nominal pressure (hydrostatic) to verify the body’s structural integrity, with no visible leakage.
- Seat test: 1.1×nominal pressure using air or water, ensuring leakage rates meet API 598 Class VI standards.
- Fire test (optional): API 607 compliance verified via 30-minute 750℃ exposure, ensuring post-fire sealing.

Valve Details

V. Product Advantages

TIANYU DN65 flanged ball valve offers significant benefits for industrial applications:

Extended Service Life: Robust materials (WCB, CF8, CF8M) and durable seals resist corrosion and wear, extending service life to 10+ years in typical environments—reducing replacement costs and downtime.
Energy Efficiency: Full-port design minimizes pressure drop, lowering pumping energy consumption by up to 20% compared to reduced-port valves. This is especially valuable in large-scale water or oil distribution systems.
Operational Safety: The fire-safe design (optional) and bubble-tight seal prevent accidental leakage, enhancing safety in hazardous environments (e.g., gas pipelines, chemical plants).
Versatility Across Industries: Compatible with water, oil, gas, steam, and mild chemicals, the valve eliminates the need for multiple valve types in mixed-process facilities.
Ease of Installation: Flanged connections align with global standards, simplifying retrofitting into existing pipelines without modifications. The DN65 size is readily compatible with medium-diameter industrial systems.
Cost-Effective Performance: Competitive pricing for robust construction, combined with low maintenance requirements, results in a low total cost of ownership over the valve’s lifecycle.

Application

VI. Product Applications

TIANYU DN65 flanged ball valve is widely used in industries requiring reliable flow control for medium-diameter pipelines:

Petroleum and Gas: Deployed in oil refineries, gas processing plants, and distribution networks, controlling the flow of crude oil, refined products, and natural gas in medium-pressure lines.
Chemical Processing: Suitable for pipelines handling mild acids, solvents, and process fluids, with CF8M stainless steel options providing enhanced chemical resistance.
Municipal Water and Wastewater: Installed in water supply mains, sewage treatment plants, and stormwater systems, where corrosion resistance and medium flow capacity are essential.
HVAC and Building Services: Controls water and steam flow in large-scale heating, cooling, and plumbing systems for commercial or industrial buildings, leveraging the valve’s efficient flow and reliable shutoff.
Food and Beverage: Used in sanitary applications (e.g., water treatment for food production, beverage transfer), where stainless steel meets hygiene requirements.

TIANYU DN65 flanged manual and power-operated ball valve, with full-port design and versatile actuation, ensures reliable flow control for water, oil, gas, and mild chemicals. Robust materials (WCB/CF8) offer corrosion resistance, PTFE/metal seals provide tight shutoff, and flanged connections simplify installation. Ideal for petroleum, chemical, and municipal sectors. Customizable in materials, seals, actuation, and pressure ratings to meet specific application needs.