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IMI CCI
DAS - Main Steam and Feedwater Isolation Valve
High-performance steam and feedwater isolation valve for nuclear applications with fast emergency closure.
Provides rapid emergency closure without relying on external power, ensuring operational safety.
Features a fully enclosed design with no gland, preventing leaks and reducing maintenance needs.
Qualified position indication system enables accurate monitoring without penetrating the valve body.
Features
The DAS Type Globe Valve is a high-integrity isolation valve designed for nuclear power applications, including main steam and feedwater isolation in BWR and PWR reactors. Utilizing a pressurizing principle and a block design with direct-mounted pilot valves, it ensures stable operation across all specified conditions, including steam, water, and transitional phases. The valve offers rapid emergency closing without external power, ensuring safety and reliability. Its fully enclosed system prevents gland leakage, and its IMI CCI-qualified position indicating system enhances monitoring without valve body penetration. Available in forged or cast materials, it supports redundancy levels for enhanced operational security.
Key features
Designed for nuclear applications
Operates in steam, water & transition phases
Pressure class up to 2500
Forged or cast carbon/stainless steel
Direct-mounted pilot valves
Sizes up to 24.8” (630mm)
BWR/PWR nuclear reactor use
System pressure actuation
Multiple qualification programs
Redundant control for safety
Specifications
Fluid Types
Water
Steam
Port Size (")
1 to 24.8
Maximum Working Pressure (barg)
172
Material
Forged Carbon Steel
Forged Stainless Steel
Design Codes
ASME
EN
Temperature Limits (°C)
20 to 400
