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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
Jan 19
LNG 2026

Meet Sofis at LNG2026, and book your live demo in Qatar!

Are you attending LNG2026 in Qatar? Make sure to stop by the Sofis booth, where we’ll be exhibiting together with our local partner Qatar Hydraulic. LNG 2026, the 21st International Conference and Exhibition on Liquefied Natural Gas, in Doha, Qatar, is bringing together global leaders, policymakers, and industry experts at... read more →
  • 19 January 2026
  • News
Jan 12
Andrea Giovane

Tecnova HT: Partnering with Sofis since 2014 to advance safe plant operations

In 2025, Sofis celebrates 40 years of pioneering linear key valve interlocking, a milestone that reflects not only technological innovation but also the enduring partnerships that have driven safer plant operations worldwide. One of those long-standing collaborations is with Tecnova HT, a trusted partner with deep expertise in complex industrial... read more →
  • 12 January 2026
  • Company, News
Jan 09
INEOS facility in Belgium

Ensuring safety in industrial powder mixing

In industries like food processing, pharmaceuticals, and chemical processing, powder mixing plays a vital role in the manufacturing process. Industrial powder mixers are essential to blend ingredients consistently and efficiently. However, with these mixers comes a significant challenge: ensuring safety while operating complex machinery. Adherence to strict regulatory standards A... read more →
  • 9 January 2026
  • Customer stories, Safe valve operation
Dec 08
Allen Liao

Jordons and Sofis: working jointly to improve process safety in China

As Sofis celebrates 40 years of linear key valve interlocking, we look back at partnerships that have shaped our journey. One that stands out in particular is our collaboration with Jordons MEP Engineering Shanghai. Established in 2003, Jordons has grown into a technical service company supplying imported industrial equipment to... read more →
  • 8 December 2025
  • Company, News
Dec 03
Susan Little

Susan Little: From design innovation to coaching future talent

Celebrating 40 years of linear key valve interlocking is also a celebration of the people who have built this expertise over the decades. Susan Little, Design Engineering Manager, has been part of our journey for over 21 years. Beyond her engineering role, Susan is a dedicated photographer and a qualified... read more →
  • 3 December 2025
  • Company, News
Nov 19
Stephan Sadowski

Unlocking the past and future: A conversation with Stephan Sadowski

In 1985, Smith Flow Control introduced the linear key valve interlock – a groundbreaking mechanical solution that revolutionized process safety. Forty years later, Sofis proudly continues that legacy, drawing strength from its roots in Smith Flow Control, Netherlocks, and other pioneers in the valve interlocking industry. To celebrate this milestone,... read more →
  • 19 November 2025
  • Company, News
Nov 01
Truck loading dock

Ensuring precision in truck loading: How to solve misloading challenges?

Even a single mistake can lead to major losses in industries that rely on accuracy. A Brazilian facility of a specialty chemicals company was using four 4-inch valves used for daily truck-loading operations. They faced the potential of expensive issues, as operators could accidentally open the wrong valves, causing trucks... read more →
  • 1 November 2025
  • Customer stories, News, Safe valve operation
Oct 25
Bernard Thiele

40 years of linear key valve interlocking: A veteran’s view from the field

As Sofis celebrates 40 years of pioneering linear key valve interlocking, we’re shining a light on the people behind the systems; the engineers whose hands and insights helped build our legacy. One of them is Bernard Thiele, a long-serving Sofis professional whose journey through service engineering to technical support has... read more →
  • 25 October 2025
  • Company, News
Sep 28
Chain wheel operated valves

Why chain wheel operated handwheels are putting operators at risk

In many industrial facilities, particularly in the oil & gas, chemical, and power sectors, chain wheels are still commonly used to operate manual valves in elevated or hard-to-reach locations. They are considered a low-cost, easy-to-implement solution that allows operators to actuate valves from ground level. While offering convenience, they also... read more →
  • 28 September 2025
  • Remote manual valve operation
Aug 25

From paper drawings to digital safety: 14 years at Sofis with Nitul Sanghvi

This year marks 40 years since Smith Flow Control introduced the concept of linear key valve interlocking, a breakthrough in operational safety that helped shape an entire industry. To celebrate this milestone, we’re highlighting the people behind the evolution. Nitul Sanghvi, Senior Manager Strategic Accounts (APAC, Middle East & Africa)... read more →
  • 25 August 2025
  • Company, News
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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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