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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
Sign showing days without accidents

Do you want to see a large number here?

At the entrance of nearly every industrial site, you’ll find a simple counter, updated daily, meant to promote awareness, caution, and pride. But what happens when that number resets? Every... read more →
  • 9 July 2025
  • Fast manual valve operation, Remote manual valve operation, Safe valve operation, Valve position monitoring
Explosion in the oil and gas industry

Why valve interlocks matter: Insights from the Freeport LNG incident

On June 8, 2022, the Freeport LNG export terminal in Texas experienced a serious incident: a vapor cloud explosion and fire that shut down operations for several months. This facility,... read more →
  • 24 June 2025
  • News, Safe valve operation
Refinery explosion

Preventing disaster: How a valve interlocking system could have averted the Valero refinery explosion

In 2020, a serious incident occurred at Valero’s Mereaux refinery in Louisiana when a hydrocracker unit released a flammable mixture of hydrogen and hydrocarbon gas. The gas ignited, triggering an... read more →
  • 18 June 2025
  • News, Safe valve operation
Valve interlock key

Why regular valve interlock checks are essential for compliance in the oil & gas industry

In the oil and gas industry, safety is a regulatory requirement. And when it comes to valve interlocking systems, regular inspections are not optional. They are essential to stay compliant... read more →
  • 16 June 2025
  • Customer stories, News, Safe valve operation
Key management system information screen

Unlocking safer, smarter valve operations with key management systems

Manual valve operations are a critical component of industrial plant safety, and valve interlocks play a crucial role in ensuring that these operations are carried out in the correct sequence.... read more →
  • 15 June 2025
  • Safe valve operation
Cruise ship

Guaranteeing safe and sustainable Hydrogen powered shipping

Hydrogen is a clean, sustainable alternative to traditional fossil fuels. However, adopting hydrogen as a marine fuel involves overcoming significant technological and regulatory hurdles. The sHYpS project addresses this challenge... read more →
  • 7 May 2025
  • Customer stories, News, Safe valve operation
LNG tanker unloading using unloading arm

Securing LNG operations: How valve interlocking systems are the last line of defense

The LNG industry operates in a high-risk environment where safety, reliability, and precision are paramount. Advanced valve interlocking solutions prevent operational errors, enforce correct valve operation sequences, and integrate seamlessly... read more →
  • 18 March 2025
  • Safe valve operation
Water treatment plant

Enhancing safety in water treatment by preventing Oxalic Acid contamination

The global supply of clean water is facing unprecedented pressure due to industrialization, growing demand, and increasing biological and chemical contamination. This strain presents a serious threat to the environment,... read more →
  • 2 December 2024
  • Customer stories, Safe valve operation

Enhancing safety at liquid hydrogen loading stations through collaborative innovation

Sofis recently partnered with a leading customer in the Botlek area of Rotterdam, The Netherlands, to tackle a critical safety challenge at their liquid hydrogen loading stations. The objective was... read more →
  • 25 November 2024
  • Customer stories, News, Safe valve operation
Valve interlocks installed in an aluminum process facility

Enhancing process safety with valve interlocks: avoiding incidents in the alumina industry

In process industries, the consequences of over-pressurization incidents can be catastrophic. A notable example in the oil and gas industry is the Piper Alpha disaster, where incorrect handling of pressure... read more →
  • 29 October 2024
  • Customer stories, 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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