Smith Flow Control and Netherlocks have merged. We are now Sofis.


If sequential control is unnecessary but a secure lock is required, the Sofis range of lockout products can provide the solution you need.

Temporary Isolation of your equipment

Sofis valve lockout products enable you to isolate and lockout equipment. This prevents the release of potentially hazardous materials during maintenance and servicing activities. Lockout products are flexible personal safety only solutions for maintenance environments. They should not be mistaken with or wrongfully used as a process safety solution like valve interlocking.

Lockout padlock


  • Wirelock (Car seal) for one time use
  • Wirelock (Car seal) reusable
  • Chain Lock SFC (Ellis locked)
  • Hybrid lock (NL-H)
  • Multi pad Lock (MPL)
  • EasiLok padlocks
  • Handwheel covers

In case of uncertainty concerning the possible process safety aspects of your objected LOTO application, please contact our experts for alternative process safety solutions.

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Sofis offers you support through local service centers and a network of certified local service partners. This enables efficient execution of installation and maintenance of your Sofis products. We strive to create partnerships with our clients, providing a turnkey approach to service. This will result in a reduction of your total cost of ownership.

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