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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
Refinery in Southern Europe

Refinery avoids human error with VPI position indicator

A petroleum industry company based in Southern Europe recently decided to install Sofis VPI position indicators on 13 manual-operated valves, as part of a modernization process of their tanker loading... read more →
  • 13 August 2024
  • Customer stories, News, Valve position monitoring
Sofis safety solutions for the chemical industry

Safety solutions for the chemical industry

Chemical plants manufacture or process chemicals using specialized equipment, units, and technology in the manufacturing process. Other kinds of plants, such as polymer, pharmaceutical, food, and some beverage production facilities,... read more →
  • 25 January 2024
  • Fast manual valve operation, Safe valve operation, Valve position monitoring
Self made bracket type valve position indicator

Typical problems with self-made solutions for valve position indicators

Self-made solutions for valve position indicators are often used to determine the open and closed position of a manual multi rotation valve. What are the main problems that customers experience... read more →
  • 28 November 2023
  • Valve position monitoring
EuroTank Terminals port of Amsterdam

VPI position indicator allows Dutch tank terminal to avoid contamination and incorrect tank line-ups

A long-established terminal in The Netherlands employs Sofis VPI position indicators to prevent incorrect valve line-ups. The terminal consists of 11 jetties to handle the demand. It provides deep water... read more →
  • 29 August 2023
  • Safe valve operation, Valve position monitoring
Sofis solutions for the energy transition

Sofis for the energy transition

Sofis provide valve interlocks and portable actuators used in next generation energy infrastructure. We ensure that valves are operated correctly, preventing accidents and protecting the planet. Green hydrogen Protecting critical... read more →
  • 24 October 2022
  • Fast manual valve operation, Remote manual valve operation, Safe valve operation, Valve position monitoring
Key management system for process interlocking

Evolution in valve interlocks towards integration

Interview with Stephan Sadowski (Head of Business Development) for Valve World, May 2021 edition, page 38-39. Valve interlocks have evolved over the years, from mechanical, stand-alone devices to integrated electrical,... read more →
  • 1 June 2021
  • News, Safe valve operation, Valve position monitoring
Valve postion indicator for gate and globe valves

To better solutions for valve position indicating

In the process industry, awareness of the valve status is essential to avoid injury and equipment damage. A market research conducted by Sofis reveals that many companies apply self-made or... read more →
  • 28 November 2020
  • Valve position monitoring
Position transmitter for linear manual valves

The most reliable position transmitter for manual gate and globe valves

Market research by Sofis has revealed that many companies apply a self-made or ‘bracket-type’ position transmitter or position indicator to manual multi-rotation valves. This transmitter measures the distance of travel... read more →
  • 6 September 2017
  • Valve position monitoring
Reliable valve status information for linear valves

Reliable linear valve status information

The VPI position indicator (VPI) provides process facility control rooms with a reliable remote signal, keeping personnel aware of the current position of hand wheel-operated gate valves. Accurate valve status... read more →
  • 5 September 2017
  • Valve position monitoring
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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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