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Sofis valve operation Sofis valve operation
  • Home
  • Products
    • Smith interlocks
    • Netherlocks interlocks
    • Ellis interlocks
    • Key Management System
    • EasiDrive portable actuator
    • Power Wrench portable actuator
    • FlexiDrive remote operator
    • VPI position indicator
    • SiLoC silo loading & unloading
  • Services
  • Solutions
    • Enforce safe valve operation
    • Monitor manual valve positions
    • Operate manual valves quickly
    • Operate manual valves remotely
    • Ensure integrity of critical safety systems
    • Ensure operational efficiency
    • Mitigate effects of human error
  • Applications
  • Industries
  • Customer stories
  • About us
    • Sustainability
    • Certification
    • Sofis: The safest choice
    • Our heritage
    • Vacancies
    • Internships
  • News
    • Download brochures & application notes
    • Sofis Connect newsletter
    • View product videos
  • Contact
Valve interlocks are used to safeguard safe boiler blow down procedures

Enforcing safe valve operations in boiler blow-down procedures

For efficient operation of boilers, frequent ‘bottom blow-down’ procedures are required to help remove sludge deposits from within the vessel. Sludge may form from dirt in the water supply or... read more →
  • 6 November 2017
  • Safe valve operation
Valve interlocks are used to secure safe ethylene cracking.

Securing safe ethylene production with the use of valve interlocks

Ethylene production is an inherently complex and dangerous process, particularly when considering the operation of valves and/or line blinds around a cracking furnace. The incorrect operation of the controls to... read more →
  • 6 November 2017
  • Safe valve operation
Valve interlocks on pressure safety valves

Safety Relief Systems; securing an open path to relief at all times

An open path to relief must be maintained on Safety Relief Systems at all times during work exercises. A spare relief capacity, enables continuous production while maintenance procedures take place,... read more →
  • 6 November 2017
  • Safe valve operation
Valve interlock start key release is based on key detection and compressor inputs

Valve interlock key panel for SBM releases start key based on key detection and compressor input

SBM reaches new levels of pigging safety using valve interlocks managed by a sequence control panel. This electronic panel manages start key release, based on compressor input signals and key... read more →
  • 9 October 2017
  • Safe valve operation
How to open a Netherlocks interlock locked open valve

How to operate a locked-open valve and a locked-closed valve

In order to operate a valve equipped with a Netherlocks interlock from a locked-open to a locked-closed position, you first need the 'open' key for that particular valve interlock. The... read more →
  • 8 September 2017
  • Safe valve operation
A valve locking device for incidental isolation of valves

Using a valve locking device for incidental valve isolation

If sequential control is unnecessary, a valve locking device can be used to temporarily lock off the valve. The valve locking device enables individual personnel to isolate equipment while they... read more →
  • 8 September 2017
  • Safe valve operation
Valve sequence control unit for pipeline pigging operations

A pigging procedure should address both normal and unusual conditions

Pigging systems are used to insert a pipeline inspection gauge (pig) into a live system transporting gas or liquid media, in order to perform various maintenance operations. As they involve... read more →
  • 5 September 2017
  • Safe valve operation
Valve interlocks guarantee safe pigging operation

Using valve interlocks to enforce a safe pigging operation procedure

A pigging operation is dangerous, as opening a pig trap closure while there is pressure in the barrel can shoot the pig out of the launcher at high speeds. Attempting... read more →
  • 5 September 2017
  • Safe valve operation

Bulk handling system prevents contamination

Sofis valve operation has installed a safety system for bulk handling at logistics company Limpens Elsloo. The system prevents contamination due to incorrect filling of silos. Thanks to the smart... read more →
  • 9 January 2017
  • Safe valve operation, Valve position monitoring
Valve interlock for pigging closure door

Fatal incident stresses importance of eliminating human error on pigging operations

A fatal incident on June 25th 2012 at a production facility of one of the globally leading oil companies in the United States proves the need for guaranteeing safe pigging... read more →
  • 21 December 2016
  • Safe valve operation
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About us

Sofis is a manufacturer of valve operation systems such as mechanical valve interlocks, portable actuators and valve position indicators. We are the world’s largest interlock manufacturer, providing bespoke design solutions that protect people and property throughout the world. We create smart valve solutions that improve process and operator safety to protect people and the planet.

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