Ellis Valve Interlocks

Discontinuation of Ellis interlocks

Sofis is continually looking to improve its product offerings and streamline its processes to offer customers the best solutions available for managing valve operations.

In order to improve our ability to accommodate emergency shipments and make room to grow in our newer and innovative solutions, we must discontinue production lines that are in low demand
and decreasing year over year.

Sofis will be discontinuing the Ellis line of interlocks effective in December of 2018. We will be accepting final purchase orders until December 7th 2018.

The Ellis chain lock will continue to be produced, as well as spare keys.

The Sofis brands, Smith flow control and Netherlocks are our leading interlock lines that include the latest developments to suit all interlock requirements.

Please consult a Sofis representative to understand how we can replace your current Ellis locks with a Sofis interlock system.



New Ellis Key Interlock








Recognised worldwide, Ellis interlocks are used for critical process applications in oil and gas, petrochemical and water industries.  The Ellis integral design is developed around the turnkey principle, incorporating a rotational locking mechanism and spring loaded rubber seal, which helps prevent ingress of sand, dust and water or any other foreign matter.

GG Interlocks For Wheel Operated Valves

  • Gate Valves
  • Gear Operated Valves
  • Globe Valves
  • Knife Valves
  • Diaphragm Valves

90L Interlocks For Lever Operated Valves

  • Ball Valves
  • Butterfly Valves
  • Plug Valves
  • 3-way Valves

Colour Aware Key Cabinet System

  • Secure storage and control of valve interlock keys.