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Kirk Key Interlock Company, Part of the Sentric Group
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  5. KIRK - Model Type F SD and HD Series - ...

KIRK - Model Type F SD and HD Series -Isolation Interlock

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KIRK Type F interlock is a key operated mechanical interlock that is suitable for the control of electrical switchgear. The standard unit comes with a stainless steel 5/8” diameter locking bolt with a throw or travel of 3/4”. The locking bolt is used to control the rotation or movement of operating handles or toggles of electrical switchgear. Many suppliers of switchgear equipment have mounting provisions available for KIRK® interlocks. The Type F interlock is available in both SD and HD series.

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  • Locking Bolt Length - when ordering, specify the length of the locking bolt in the withdrawn position. Standard lengths are 1/4", 3/8", 1/2", 3/4”, 1", 2", and 3". Non-standard lengths are also available. (1” Lock Bolt shown on drawing)
  • Key Removable - the key(s) is removable when the locking bolt is either in the extended (E) or withdrawn (W) position. Please choose E or W when ordering an interlock. Key removable extended is the most common because the locking bolt is typically extended to block/engage something.
  • Multi-Cylinder - up to 15 cylinders available. Housings with 5 cylinders or more come with mounting holes at each end of the housing. Designate "E" or "W" key removable position for each cylinder.
  • Stamp Key Interchange - specify an alphanumeric code to be stamped on the cylinder face and the key (e.g. A1, A2, B1, etc. - up to 5 characters). See SD Series Data Sheet for Keys (3.4) and Terminology (4.1) for details.
  • Auxiliary Switches - see SD Series Data Sheets for Type Thermoplastic (2.3), Type S (2.4) and Type K (2.5) for details.
  • Dust Covers - see SD Series Data Sheet for Dust Covers (3.1) for details.
  • Mounting Bolts - see SD Series Data Sheet for Mounting Bolts (3.2) for details.
  • "Opposite Hand" - see SD Series Data Sheet for Terminology (4.1) for details.