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IMI CCI
STV - Main Steam Isolation Spring-loaded Valve
Compact spring-loaded valve providing precise main steam isolation for nuclear applications.
Unique design ensures high opening stability, eliminating chattering and set point drift.
Adjustable hysteresis allows for precise control tailored to application needs.
In-situ setup adjustment with a SEV device eliminates disassembly downtime.
Features
The STV Type Spring-loaded Valve is a compact, high-performance 3/2-way valve designed for main steam isolation in nuclear applications, including BWR and PWR reactors. Built from forged carbon or stainless steel, it operates with air, steam, water, and acids, making it a versatile solution for demanding environments. Fully qualified to IEEE 323 and IEEE 344 standards, this valve ensures reliable operation and precise control. Available with or without a bellow seal, it offers enhanced stability, set point accuracy, and in-situ adjustability, making it a trusted choice for nuclear power plants worldwide.
Key features
3/2-way valve for main steam isolation
Size: 0.2” (5mm)
Class rating up to 2500
Forged carbon or stainless steel construction
Qualified to IEEE 323 and IEEE 344 standards
Operates with air, steam, water, and acids
Available with or without bellow seal
Anti-simmering solenoid valve option
IEEE-qualified limit switches available
Installed in over 100 applications worldwide
Specifications
Fluid Types
Water
Steam
Maximum Working Pressure (barg)
172
Material
Forged Carbon Steel
Forged Stainless Steel
Cast Carbon Steel
Cast Stainless Steel
Design Codes
ASME
EN
Temperature Limits (°C)
20 to 400
