• ATWOOD&MORRILL Main Steam Isolation Valve 6
  • ATWOOD&MORRILL Main Steam Isolation Valve 1
  • ATWOOD&MORRILL Main Steam Isolation Valve 2
  • ATWOOD&MORRILL Main Steam Isolation Valve 3
  • ATWOOD&MORRILL Main Steam Isolation Valve 4
  • ATWOOD&MORRILL Main Steam Isolation Valve 5

ATWOOD & MORRILL®

Main Steam Isolation Valve

Main Steam Isolation valves are utilized to assure rapid closure and tight shut off of the main steam lines for primary containment in Nuclear Power plants. The design is used extensively throughout the nuclear fleet worldwide. The durability and reliability has been proven in service and through rigorous qualification testing.

KEY FEATURES & BENEFITS

Fail safe operating reliability
Design simplicity
Tight shut-off
Low pressure drop
Ability to open against differential pressure
One piece forged stem

APPLICATIONS

Main Steam lines in BWR and PWR Power Stations

DESIGN STANDARD

ASME B16.34, ASME Sec III

PRESSURE CLASS RANGE

ASME 600 to 1500

SIZE RANGE

14 – 34 inches (350 – 850 mm)

TEMPERATURE RANGE

Up to 1200ºF

MATERIALS

Carbon steel or alloy steel

UPGRADES & ADAPTATIONS

Poppet stabilization
Preventive maintenance

DOWNLOADS

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