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