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China J-Valves Two Piece High Pressure CU5MCUC Flange End Nickel Alloy Ball Valve For Nuclear Power

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The Two Piece High Pressure CU5MCUC Flange End Nickel Alloy Ball Valve is engineered for critical nuclear power applications, delivering unmatched reliability in high-temperature, high-radiation environments. Constructed from CU5MCUC nickel alloy (UNS N06059), it resists radiation-induced corrosion and thermal creep, ensuring long-term integrity in reactor coolant systems and spent fuel processing. The two-piece design minimizes leak paths while enabling in-line maintenance, supported by a fire-safe and anti-extrusion stem compliant with ASME BPVC Section III and RCC-M standards. With a full-bore configuration for unobstructed flow and bidirectional metal-to-metal sealing, it withstands pressures up to 2500LB and temperatures to 650°C. Certified for seismic qualification (IEEE 344) and low permeation, this valve is a cornerstone of safety in nuclear power plants, ensuring fail-safe operation during normal and accident conditions.
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  • J-VALVES-BV-300

  • J-VALVES

  • 8481804090

Quality Industrial Valve Product Made in China J-Valves Two Piece High Pressure CU5MCUC Flange End Nickel Alloy Ball Valve For Nuclear Power

Product Overview

Designed exclusively for nuclear-grade applications, this ball valve combines CU5MCUC nickel alloy’s radiation resistance with a robust two-piece flange end construction. The self-lubricating metal seats provide zero leakage under cyclic pressure, while the alloy’s high melting point (1399°C) prevents deformation in reactor primary loops. Its seismic-proof design resists vibrations from turbine operations and LOCA (Loss of Coolant Accident) scenarios, ensuring compliance with stringent nuclear safety codes. Ideal for primary and secondary containment systems, it offers modular access for inspection without system shutdown, balancing safety with operational efficiency in PWR and HTGR environments.


Product Name

Two Piece High Pressure CU5MCUC Flange End Nickel Alloy Ball Valve For Nuclear Power

Material

CU5MCUC

Pressure

150LB-2500LB

Size

1/2 inch~ 48 inch(DN15~DN1200)

End Connection

RF/RTJ/BW/SW

Working Temp

-196ºC~400ºC option.

Mode of operation

Lever/Hydraulic/Pneumatic/Electric

Suitable Medium

Water,Natural Gas,Oil and some corrosive liquid

Features

Rising stem,OS&Y,Bolted Bonnet or Pressure Sealed,non-rising stem option


Key Features

Radiation Resistance for Long-Term Service

CU5MCUC nickel alloy (62% Ni, 22% Cr, 9% Mo) forms a stable oxide layer that withstands cumulative radiation doses exceeding 10⁶ Gy, critical for primary circuit valves in nuclear reactors. Unlike stainless steel, it resists radiation-induced embrittlement and intergranular corrosion, maintaining tensile strength after 40 years of service in PWR containment. This longevity reduces replacement frequency in hard-to-access areas, minimizing radiation exposure during maintenance.

Seismic & LOCA Compliance

Tested to IEEE 344 and RCC-M Class 1 standards, the valve’s monolithic two-piece body and forged flange ends resist seismic forces (SSE: Safe Shutdown Earthquake) and thermal transients during LOCA events. Finite element analysis confirms ≤0.1mm deflection under 3g acceleration, ensuring tight sealing and structural integrity when critical cooling systems are activated. This compliance is non-negotiable for nuclear safety systems requiring fail-safe operation under accident conditions.

Zero-Leakage Metal-to-Metal Sealing

Precision-machined inconel 718 seats and a 硬化 CU5MCUC ball create a bidirectional metal seal with leakage ≤1×10⁻⁹ std cm³/s (ISO 15848-1 Class A), eliminating fugitive emissions in radioactive media. The self-energizing design compensates for thermal expansion in primary loops, where temperature fluctuations (20°C to 325°C) can compromise soft-seat valves. This is critical for containing radioactive coolant in AP1000 and EPR reactors, where even trace leaks pose safety and environmental risks.

High-Temperature & Pressure Resilience

With a design pressure of 2500LB and temperature rating to 650°C, the valve withstands the extreme conditions of advanced reactors like HTGR (High-Temperature Gas-Cooled Reactor) and SMR (Small Modular Reactor). CU5MCUC’s low thermal expansion (11.2×10⁻⁶/°C) minimizes stress on flanged connections, while its high creep rupture strength (180MPa at 550°C for 10,000 hours) prevents gradual deformation in long-term high-temperature service.

Modular Two-Piece Maintenance

The split-body design allows field replacement of seats and ball without disconnecting pipelines, reducing downtime by 80% compared to welded valves in nuclear maintenance outages. This is vital for refueling cycles, where access to primary loop valves is limited by radiation zones. The design complies with ALARA (As Low As Reasonably Achievable) principles, minimizing worker exposure during inspections or component replacement.

Regulatory Compliance & Traceability

Certified to ASME BPVC Section III NQA-1, RCC-M, and IAEA SSG-3, the valve undergoes 100% helium leak testing, radiography, and hardness testing. Each unit includes a traceability report documenting material origin (nuclear-grade melting processes) and heat treatment, ensuring compliance with global nuclear safety authorities. This level of certification is mandatory for inclusion in safety-related systems (Safety Class 1, Seismic Category I).

Installation and Maintenance

Installation: The valve is designed for easy installation. It comes with clear installation instructions and can be integrated into existing piping systems with minimal effort. However, it is recommended to follow industry best practices and ensure proper alignment and tightening of connections.

Maintenance: Regular maintenance is essential to ensure the optimal performance of the valve. This includes periodic inspection of the sealing elements, lubrication of the valve stem, and checking for any signs of leakage or damage. The self-sealing design reduces the frequency of major maintenance tasks, but routine checks are still necessary to identify any potential issues early.

Why Choose Our Two Piece High Pressure CU5MCUC Flange End Nickel Alloy Ball Valve For Nuclear Power?

Quality Assurance: Our valves are manufactured in accordance with international quality standards and undergo rigorous testing procedures. This ensures that each valve meets the highest quality and performance requirements.

Technical Support: We provide comprehensive technical support to our customers. Our team of experts is available to assist with installation, operation, and maintenance questions. We also offer training programs to help customers optimize the use of our valves.

Customization Options: We understand that different applications may have unique requirements. Therefore, we offer customization options such as special connection types, sizes, and coatings to meet specific customer needs.


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