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Sep 29
Valve interlock installation

Vacancies

Sofis is part of Halma PLC, a market leader in specialist safety, health and environmental technologies, registered at the London Stock Exchange. Halma’s business is about protecting and improving the quality of life for people worldwide. Halma companies have a core focus on health, safety, and the environment, providing innovative... read more →
Jun 28
Jun 16
Ellen Maes

#INWED21: celebrating our women in engineering

We are excited to celebrate International Women in Engineering Day today, in which we acknowledge the amazing work that women engineers around the world are doing. Supporting lives and livelihoods every day. At Sofis, we’re proud of our women in engineering, like Ellen Maes, who identifies a problem, then dares... read more →
Jun 02
Jun 01
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, electronical and mechanical solutions, according to Stephan Sadowski (Sofis). “The industry trend is towards increased control via central oversight and... read more →
Dec 21
Key storage for for interlocks

Integrating electronics into mechanical valve interlocks

Mechanical valve interlocks guarantee strict adherence to procedure and thus avoid human error. They are particularly useful for operations that are generally recognized as highly dangerous, such as pigging. Valve interlocks are a cost-effective measure that results in extremely high safety levels. New developments create intelligence that allows each step within... read more →
Nov 28
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 ‘bracket type’ solutions for valve position indicating. They often experience serious issues with the use of these kinds of solution.... read more →
Nov 28
Self made bracket type valve position indicator

Typical problems with manual 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 with these types of valve position indicators and what product characteristics would end users in the industry actually prefer? Research... read more →
May 20
Operator inserts key in a valve interlock

New Smith and Netherlocks interlocks Quick Fix Guides now available

Following the success of the Netherlocks interlocks Quick Fix Guide, we recently produced the Smith interlocks Quick Fix Guide. Both guides can now be downloaded in the download section of this website. The Quick Fix Guides are reference guides, and help to better understand the basic functionality of both Netherlocks... read more →
Mar 25
Valve interlock installation

Sofis and partners install more than 1500 interlocks

For one of its customers's projects, Sofis was asked supply installation support, initially for measuring, installing and commissioning more than 1500 Netherlocks interlocks. In the end, Sofis supplied 1610 Netherlocks interlocks and 8 Smith interlocks. For 99%, the interlocks were installed on pressure relief valves (PSV). The entire process was... read more →