+31 (0)172 471 339 / +44 (0)1376 517901 | info@sofisglobal.com

Smith valve interlocks

The industry standard for premium valve interlocks. Originators of coded card linear key.

Global standard for premium interlocks

Smith Flow Control introduced the modern valve interlock in 1985. The brand became the global standard for premium valve interlocks. Smith valve and equipment interlocks provide highly reliable sequencing to operation of your valves and adjacent equipment.

Safe and efficient valve operation

Valve interlocks guarantee safety and first-time-right in manual valve operations through a key transfer principle. Valve interlocks are mechanical devices which are permanently mounted to your equipment. They avoid operator errors by enforcing adherence to procedures. By eliminating chances to human error, they avoid costs and safety risks.

Mechanical valve interlock on lmulti rotation valve
Valve interlocks on gearbox valves

Optimize your operating performance

  • Guaranteed first-time-right operation
  • Higher equipment efficiency and asset availability
  • Reliable process status feedback through color coded key positions
  • Improved HS&E performance

Premium design

  • Integral lock assembly
  • AISI 316 Stainless steel
  • Standard coated body

Easy installation

  • Bespoke mounting kit for perfect fit
  • Sequence-free commissioning with one-time commissioning keys

Optimal reliability

  • Anti-tamper assembly
  • Linear key improves reliability and operability
  • Uniquely coded keys for each lock

Universal applicability

  • Fits to any quarter or multi-turn valve
  • Fits large valves and gearboxes with high rotation counter
  • Integrates adjacent equipment in operational sequencing
valve interlocks on gearbox valves
Valve interlock on multi rotation valve

Easy installation

  • Bespoke mounting kit for perfect fit
  • Sequence-free commissioning with one-time commissioning keys

A Smith lock for every equipment

Engineering support

Valve interlocking application is probably not part of your daily routine. We can assist you with our extensive application expertise and over 30 years of field experience and project management skills. Our global team of engineers assist you with valve operating sequence design or customized interlocking solutions.

Get free advice

Find your local partner

Contact us

Get your interlocks offer

Get offer

Subscribe to our newsletter

Subscribe