DIN API DN50 2 Way Actuated CF8M SS304 WCB Flanged V Port Segment Metal Hard Seal Ball Valve with Pneumatic Actuator

I. Product Overview

TIANYU DIN API DN50 2-way actuated V port segment ball valve is a high-performance industrial valve engineered for precise flow control and reliable shutoff in complex media environments. Integrating a pneumatic actuator with a V-shaped segment ball design, this valve combines the advantages of fast actuation, strong shear capability, and durable hard sealing—making it suitable for both on-off control and throttling regulation. Constructed from corrosion-resistant materials (CF8M, SS304, WCB) and featuring flanged connections compliant with global standards, it excels in handling media such as water, steam, light oil, and fluids containing small solid particles or fibers.

Designed to meet DIN EN 12266 and API 609 norms, the valve delivers consistent performance across medium-to-high pressure (PN16-PN40) and wide temperature (-20℃ to 425℃) ranges. It is widely deployed in industries like petroleum, chemical processing, water treatment, power generation, and food manufacturing—where efficient flow modulation, resistance to media abrasion, and compatibility with automated systems are critical requirements.

II. Key Attributes and Specification Parameters

Basic Attributes

Structure Design: V port segment ball valve with a floating ball structure. The V-shaped segment on the ball creates a shearing effect during operation, preventing fiber or particle clogging; the floating ball relies on line pressure to enhance sealing contact with the valve seat, ensuring tight shutoff.
Body Material: Three primary options to match application needs:
- CF8M (316 stainless steel): Offers superior corrosion resistance against chlorides, mild acids, and coastal/marine environments.
- SS304 (304 stainless steel): Ideal for clean media (water, steam) and general industrial scenarios, providing reliable rust resistance.
- WCB (cast carbon steel): Suitable for non-corrosive media (light oil, air) in low-to-medium pressure systems, balancing strength and cost-effectiveness.
Internal Component Materials:
- Ball: SS304 or SS316 (matching body material for consistency, with precision-machined V port).
- Stem: SS316 (higher corrosion resistance than SS304, preventing stem leakage and extending service life).
- Seat: Metal hard seal (SS304/SS316) for high-temperature/high-pressure resilience; optional PTFE soft seal for bubble-tight shutoff in low-temperature clean media.
Pressure Rating: PN16 (1.6MPa), PN25 (2.5MPa), PN40 (4.0MPa) — compatible with medium-to-high pressure pipelines, with a maximum operating pressure of 200psi.
Temperature Range: -20℃ to 425℃ (metal hard seal), -20℃ to 280℃ (PTFE soft seal) — accommodating low-temperature chilled water, high-temperature steam, and most industrial process fluids.
Nominal Diameter Range: DN25 to DN300, with a focus on DN50 (2-inch) for balanced flow rates (suitable for both small-batch process lines and medium-scale distribution pipelines).
Connection Type: Flanged ends compliant with ASME B16.5 (Class 150/300) and DIN EN 1092-1 (PN16/PN40). Flanges feature a raised face (RF) design, with precision-drilled bolt holes to ensure leak-free installation when paired with matching gaskets.
Actuation System: Pneumatic actuator with dual operating modes:
- Double Action (DA): Requires air supply to both open and close the valve, offering fast response (0.5-2 seconds per 90° rotation) for dynamic process control.
- Spring Return (SR): Uses air to actuate one direction and a built-in spring to return to the default position (fail-open or fail-close) during air pressure loss, enhancing operational safety.
- Supporting Accessories: Standard configuration includes solenoid valve (for air control), limit switch box (for position feedback), and air filter regulator (FRL) to clean and stabilize air supply. Optional 4-20mA positioner for precise throttling, explosion-proof components (EXD/EX) for hazardous areas, and IP68 rating for underwater or damp environments.
Media Compatibility: Clean water, raw water, steam, light oil, diesel, natural gas, fluids containing small solid particles (≤1mm) or fibers (e.g., sewage, pulp), and mild chemicals (pH 4-10).
Design and Testing Standards:
- Design: DIN EN 12266 (industrial ball valves), API 609 (butterfly valves and ball valves for industrial applications), ASME B16.34 (valves—flanged, threaded, and welding end).
- Testing: API 598 (valve leakage and shell testing), ISO 5211 (mounting interface for actuators), ensuring consistent quality and performance.

Product Overview

III. Product Features

TIANYU DN50 V port segment ball valve stands out for its engineering precision and application adaptability, with core features including:

V Port Shear Capability: The V-shaped segment on the ball creates a strong shearing force when rotating, cutting through fibers, sludge, or small particles in the medium. This eliminates clogging— a common issue with standard full-port ball valves—making it ideal for sewage treatment, pulp processing, and mining slurry applications.
Dual-Seal Reliability: Metal hard seals (SS304/SS316) provide excellent wear resistance and high-temperature tolerance, maintaining sealing integrity even after repeated cycles. For clean, low-temperature media, PTFE soft seals offer API 598 Class VI bubble-tight shutoff (near-zero leakage), reducing media waste and environmental risks.
Fast Pneumatic Actuation: The pneumatic actuator delivers rapid 90° rotation (0.5-2 seconds), enabling quick response to process changes—critical for emergency shutdowns in chemical plants or flow adjustments in power generation steam lines.
Corrosion Resistance: CF8M/SS304 materials resist pitting, crevice corrosion, and chemical attack from chlorinated water, mild acids, or coastal salt air. WCB options provide cost-effective durability for non-corrosive media, ensuring long service life across diverse environments.
Flexible Control Modes: Supports both on-off control (for simple shutoff) and throttling regulation (with 4-20mA positioner). The positioner enables precise flow adjustment (±1% accuracy), making it suitable for processes requiring stable flow rates (e.g., chemical dosing, food beverage filling).
Safety and Durability Enhancements: Spring return actuators ensure fail-safe operation during air supply failure, preventing process overflow or equipment damage. Explosion-proof accessories (EXD solenoid valve, EX limit switch) meet ATEX or IECEx standards, enabling use in hazardous areas (e.g., oil refineries, gas processing plants).
Easy Installation and Alignment: Flanged connections comply with global standards (ASME/DIN), allowing seamless integration into existing pipelines without custom modifications. The actuator’s ISO 5211 mounting interface ensures quick, accurate alignment with the valve, reducing installation time.

IV. Manufacturing Process

TIANYU adheres to a 12-step rigorous manufacturing workflow to ensure the quality, precision, and reliability of the DN50 V port segment ball valve—each step optimized for industrial performance:

1. Raw Material Selection and Testing: All materials (CF8M, SS304, WCB, SS316 stem) undergo strict incoming inspection. Chemical composition analysis (via 光谱仪) verifies material purity (e.g., molybdenum content in CF8M), while mechanical testing (tensile strength, hardness) ensures compliance with ASTM standards. SS316 stems additionally undergo salt spray testing (48 hours) to confirm corrosion resistance.
2. Precision Casting: Valve bodies and balls are produced via investment casting (lost wax process) for CF8M/SS304, or sand casting for WCB. This process achieves a smooth internal surface (Ra ≤1.6μm) and dimensional accuracy (±0.05mm), eliminating internal defects like porosity that could cause pressure leakage.
3. Heat Treatment: Cast components undergo solution annealing (for stainless steel) or normalizing (for WCB) to relieve internal stress, enhance material toughness, and improve corrosion resistance. CF8M parts are heated to 1050-1100℃ and quenched in water, while WCB is heated to 850-900℃ and cooled in air.
4. CNC Machining: Critical components are processed using 5-axis CNC machines for precision:
- Ball: The V port is machined to a precise angle (15°/30°/60°, based on flow requirements) and polished to Ra ≤0.8μm to ensure smooth rotation and proper sealing.
- Valve Seat: Metal seats are ground to match the ball’s contour (tolerance ±0.02mm), while PTFE seats are molded and bonded to the seat ring for secure attachment.
- Flange Faces: Raised faces are machined to ASME B16.5/DIN EN 1092-1 standards, with bolt holes drilled using CNC positioning to ensure alignment.
5. Surface Treatment: Stainless steel components undergo passivation (using nitric acid) to form a protective oxide layer, enhancing corrosion resistance. WCB components are painted with epoxy resin (2-3 coats) to prevent rust in outdoor or damp environments.
6. Component Assembly:
- Stem Installation: The SS316 stem is inserted into the valve body, with a graphite packing gland compressed to prevent stem leakage.
- Ball and Seat Assembly: The V port ball is placed between two seats, with guided alignment to ensure the V segment aligns with the flow path.
- Actuator Mounting: The pneumatic actuator is mounted via ISO 5211 brackets, with torque calibration to match the valve’s operating requirements (ensuring smooth rotation without overloading).
7. Accessory Integration: Solenoid valves, limit switches, and FRL units are connected to the actuator, with wiring checked for continuity and proper signal transmission. Explosion-proof accessories undergo additional testing to verify seal integrity.
8. Pressure and Leakage Testing:
- Shell Test: The valve body is filled with water and pressurized to 1.5×nominal pressure (e.g., 2.4MPa for PN16) for 10 minutes, with no visible leakage or deformation.
- Seat Test: Air or water is applied at 1.1×nominal pressure, with leakage rates measured to meet API 598 Class IV (metal seal) or Class VI (PTFE seal).
- Actuation Test: The valve undergoes 500+ open/close cycles to verify actuator performance, with position feedback checked for accuracy.
9. Dimensional Inspection: Critical dimensions (flange thickness, ball diameter, V port angle) are measured using coordinate measuring machines (CMM) to ensure compliance with design standards.
10. Cleaning and Passivation: Final cleaning removes machining debris, with stainless steel parts re-passivated to restore the protective layer damaged during assembly.
11. Marking: Laser marking is applied to the valve body, indicating nominal diameter, pressure rating, material, and serial number for traceability.
12. Packaging: Valves are wrapped in bubble wrap, placed in EPS foam, and packed in export wooden cases (IPPC-certified) to prevent damage during transportation.

Valve Details

V. Product Advantages

TIANYU DN50 V port segment ball valve delivers tangible value for industrial operations, with key advantages including:

Clogging Prevention: The V port’s shear design solves the common problem of fiber/particle accumulation in standard ball valves, reducing maintenance downtime by 30-50% in sewage or pulp applications. For example, in a municipal wastewater treatment plant, this valve avoids frequent disassembly to clear clogs, ensuring continuous flow.
Extended Service Life: Metal hard seals and corrosion-resistant materials (CF8M/SS316) withstand abrasion and chemical attack, extending the valve’s service life to 8-12 years—twice that of plastic-sealed valves. In coastal power plants, SS316 components resist salt air corrosion, eliminating the need for annual replacements.
Energy and Cost Efficiency: Fast pneumatic actuation reduces energy consumption compared to electric actuators (no standby power required), while the full-bore V port minimizes pressure drop (≤5% at maximum flow). This lowers pumping energy costs by 15-20% in large-scale water distribution systems.
Operational Safety: Spring return actuators and explosion-proof accessories mitigate risks in hazardous environments. In an oil refinery, a sudden air pressure loss triggers the actuator’s spring to close the valve, preventing oil leakage and potential fires.
Versatile Compatibility: Compliance with DIN/API/ASME standards enables global deployment. For international chemical projects, the valve integrates seamlessly with European (DIN) or American (ASME) pipelines, avoiding costly custom adaptations.
Low Maintenance: Modular design allows easy replacement of seals or actuators without removing the valve from the pipeline. The bolted bonnet provides quick access to internal components, reducing maintenance time from hours to minutes.

Application

VI. Product Applications

TIANYU DN50 V port segment ball valve is tailored to meet the demands of diverse industries, with proven performance in the following scenarios:

Water and Wastewater Treatment: Used in sewage lift stations, sludge dewatering systems, and chemical dosing lines. The V port’s shear capability handles sewage containing fibers or small solids, while SS304/CF8M materials resist chlorine corrosion in disinfection processes.
Petroleum and Petrochemical: Deployed in light oil transfer lines, diesel blending systems, and low-pressure gas pipelines. The metal hard seal withstands moderate temperatures (up to 425℃) in heated oil applications, and explosion-proof accessories ensure safety in hazardous zones.
Power Generation: Controls steam flow in auxiliary boilers, cooling water in turbine systems, and condensate return lines. The valve’s fast actuation responds quickly to load changes, while the PN40 pressure rating handles steam pressure fluctuations.
Food and Beverage: Suitable for syrup transfer, fruit pulp processing, and clean-in-place (CIP) systems. SS304 Material meets FDA standards for food contact, and the V port’s smooth surface prevents media residue buildup, ensuring hygiene compliance.
Mining and Minerals: Regulates slurry flow in mineral processing (e.g., coal washing, ore grinding). The metal hard seal resists abrasion from mineral particles, while the shear design prevents clogging by cutting through sediment.
Chemical Processing: Manages flow of mild acids (e.g., dilute sulfuric acid), alkalis, and polymer solutions. CF8M Material resists chemical attack, and the 4-20mA positioner enables precise dosing of process chemicals.

TIANYU DIN API DN50 2-way actuated V port segment ball valve, with CF8M/SS304/WCB construction, flanged connections, and pneumatic actuation, excels in flow control for water, steam, and particle-containing media. It offers shear anti-clogging, hard-seal durability, and fast response, suiting water treatment, petroleum, and power sectors. Customizable in seal type (metal/PTFE), actuator mode (DA/SR), and accessories (explosion-proof/IP68) to meet specific application needs.