November 28, 2016

Kirk access interlocks increase safety in switchgear applications, prevent arc flash

North Canton, Ohio (November 28, 2016) – KIRK interlocking products provide safe access to switchgear within HV substations. Trapped key access interlocks and key exchange units restrict physical entry and prevent dangerous operating conditions, ensuring that personnel operate equipment according to the correct sequence of operation.

Trapped key interlocks prevent injury to personnel, protect equipment from damage...

Watch for our Ad in the August 2016 print and online publication of Oil & Gas Engineering.

Mitigate hazardous risks with trapped key interlock sequenced process safety systems.

February 4, 2016

KIRK Heavy and Medium Duty Series interlocks are constructed to withstand exposure to extreme temperatures, weather, dirt, and corrosive elements that will deliver long, reliable operations.  The robust key design prevents keys from snapping and minimizes the chance of keys dropping through industrial floor grating.


The construction of both the HD and MD Series interlocks use 316 stainless steel cylinders, keys, bolts, and inner-workings that withstand harsher outdoor temperatures and...

April 7, 2015


Smaller footprint bolt lock offers greater product options for switchgear applications


North Canton, Ohio (April 7, 2015) – Kirk Key has developed a reduced size mechanical bolt interlock for smaller stature breakers. Modelled on the KIRK Standard Duty series Type F, the smaller Type FF ensures that workers follow a pre-determined sequence of operation to safely access electrical switchgear. Manufactured with a brass lock housing and cylinder, the Type FF has a ¾” travel, with a smaller diamete...

March 5, 2015


Trapped key interlocking information and products easy to find at


North Canton, Ohio (March 4, 2015) - KIRK® has launched a redesigned website at The all new site design helps users more easily navigate through trapped key interlocking product and educational information with application specific pages, standards information, and a customer portal.


The site’s new Applications section provides comprehensive information on trapped key interlock use in switchgear,...

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