Overview

Kirk Key Interlock, part of the Sentric Safety Group, is a pioneer in mechanical and electromechanical interlocking systems that ensure safety by enforcing operational sequences in power, process, and hazardous energy systems. With over 85 years of experience, Kirk’s trapped key interlock systems are trusted in critical infrastructure where human error must be prevented.

Their interlocks are engineered to protect personnel and equipment by preventing access to energized systems or unsafe operations, aligning with lockout/tagout procedures and plant safety policies.

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Product Offerings

  • Trapped Key Interlocks (Mechanical & Electromechanical)
  • Panel Interlocks and Transfer Switch Interlocks
  • Switchgear Interlock Systems
  • Valve and Access Interlocks
  • Custom Interlocking Systems for Substations & Process Plants
  • Safety Control Keys and Transfer Devices
  • Accessories for Mounting, Tagging, and Identification

Resources

Industries & Applications

Kirk Key systems are widely used in:

  • Electrical Utilities and Substations
  • Power Generation and Distribution
  • Chemical and Petrochemical Facilities
  • Water Treatment Plants
  • Industrial Manufacturing
  • Data Centers and Renewable Energy Systems

Key Advantages

  • Enforces Safe Operating Sequences and Lockout Protocols
  • Prevents Human Error in High-Risk Systems
  • Compatible with New and Retrofit Equipment
  • Custom Engineered Interlocking Schemes Available
  • UL, CSA, and IEC Certified for Global Compliance