Fluid Interlock

Fluid Interlocks is a Netherlands-based engineering company that designs and manufactures mechanical valve interlocking systems used to improve safety in industrial process operations, especially in oil & gas, petrochemical, and energy industries.

Their core focus is ensuring that valves can only be operated in a safe, pre-defined sequence, preventing human error and process accidents.

The company develops mechanical, key-based interlocking solutions that physically enforce correct operating procedures without relying on electronics or software, making them highly reliable in harsh environments.

They emphasize:

• Process safety and risk prevention
• Simple, robust mechanical design
• No modification required on existing valves
• Ease of installation on live industrial plants
• Compliance with international safety standards (API / ISO certifications)

Fluid Interlocks offers a modular product range used to control valve operations and sequencing:

• FQT (Quarter Turn Interlocks) – for ball/butterfly valves
• FMT (Multi Turn Interlocks) – for gate/globe valves
• FKE (Key Exchange Systems) – for sequencing control
• FKC (Key Cabinets) – for key management and process status
• FPC (Pig Closure Interlocks) – for pigging vessel safety
• FSC (Sequence Control Systems) – for complex operational logic