Kirk Key Interlock Company, Part of the Sentric Group

Kirk Key Interlock Company LLC manufactures trapped key interlocks and safety interlocking systems for the protection of personnel and equipment. Our products include mechanical interlocks, electro-mechanical interlocks, valve interlocks, solenoid key release units, time delay key release units, and transfer panels. Proper application of our trapped key interlocks guarantees that a sequential pattern is followed for each step of a prescribed sequence. KIRK key interlock systems are designed and configured to each user’s requirements and revolve around a key or keys that an operator must use at each step in the sequence. We manufacture four different styles of trapped key interlocks: SD Series, MD Series, HD Series, and Eagle Series interlocks, featuring valve interlocks for flow control applications.