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IMI CCI
NB Main Feedwater and Bypass Feedwater Control Valve
Precision feed-water control for nuclear systems.
Delivers stable performance with high tightness classes for reliable operation.
Features advanced disc-stack technology for wide controllability.
Equipped with IEEE-qualified electro-motor and overload protection system.
Features
The NB Type Globe Valve from IMI delivers precise control for main and bypass feed-water systems in nuclear applications. Operated by an electro-motor or manually, this valve offers exceptional stability and high tightness classes for reliable performance. Forged or cast from carbon or stainless steel, it is designed to handle water and two-phase flows under demanding conditions. With sizes up to 450 mm and a class rating of 1500, the NB valve features IMI’s proprietary mechanical overload protection and IEEE-qualified components for enhanced durability and safety. Its advanced disc-stack technology ensures superior controllability across a wide range of operations.
Key features
Designed for nuclear applications
Electro-motor or manually operated control
Class rating up to 1500
Size up to 17.7” (450 mm)
Forged or cast carbon or stainless steel construction
Handles water and two-phase flows
High tightness classes for leakage prevention
Advanced disc-stack technology for controllability
Proprietary mechanical overload protection
Qualified under IEEE standards
Specifications
Fluid Types
Steam
Trim Category
Single Stage
Material
A217-WC9
A217-C12A
G17CrMoV5-10
Actuator Type
Hydraulic
Design Codes
ASME (Section VIII)
ASME (B16.34)
EN
Service Category
Severe
Max. ASME Rating
1500
Certification
PED
Temperature Limits (°C)
0 to 580
