IMAC Systems


locking device

This locking device is a favorite among gas service and distribution companies that require security and tamper-proof protection for their lubricated plug valves. Originally developed by Kerotest, tens of thousands of units have been sold and are in service today.

It fits most existing sizes (1/2" to 8") without modification.

Click here for product literature/installation instructions.

locking device pieces


  • Adapts Easily For Most Lubricated 1/2" Through 8"
  • Fits Most Existing Plug Valves Without Modification
  • One Size Fits All
  • Eliminates Need To Stock Different Sizes
  • Unique Swivel Feature Allows To Be Turned With No Rotation Of The Plug
  • Tamper-Proof - Eliminates Gas Pilferage
  • Will Not Rust Or Freeze Up
  • Installs With Snap Ring Pliers
  • Reduces Need For Security Checks