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Gate valves

Sentinel Valve



The Sentinel Gate Valve’s robust design and proven dependability make it a permanent solution for pervasive gate valve performance issues in critical isolation applications in both BWR and PWR plants.

  • Minimize dose exposure
  • Minimize recurring or emergent maintenance requirements
  • Excellent leak rate performance across current installed base
  • Innovative wedge designed by Kalsi engineering and validated by extensive flow loop and design-effects qualification testing
  • T-head stem
  • Full port or reduced port design
  • Pressure seal or bolted bonnet design
  • Full length wedge guides
  • Meet design requirements of ASME B16.34, B16.25, B16.10 and ASME Section III


  • Full range of body/bonnet materials
  • Full range of trim materials

Size Range

  • 3 thru 12

Other sizes may be available and require additional evaluation

Pressure Rating

  • Class 600 thru Class 1500

Other pressure classes may be available and require additional evaluation

Temp Range

  • Up to 1000 °F (Carbon steel valves)
  • Up to 1500 °F (Stainless steel valves)

Typical Applications:

  • Reactor water cleanup
  • HPCI
  • RCCI
  • Emergency feedwater
  • Containment isolation

Other Applications:
Suitable for critical water or steam applications where a gate valve has chronic leakage issues or pressure locking. Replacement for gate valves that are subject to low leakage requirements and/or high maintenance costs. Can be installed in a BWR, PWR, or new reactor designs.

Other sizes may be available and require additional evaluation

Emergency Valve Parts & Machining: 800-272-6315