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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 →
Mar 18

Covid-19 update

Update March 18, 2020 In order to protect our staff and customers and help to avoid further spreading of the COVID-19 virus, we have put various measures in place. These measures balance the safety of our customers and employees and sustaining our business. We are restricting any form of unnecessary... read more →
Feb 18
Operating heavy manual valves is time consuming

Health and safety in valve operations – Human Factors Engineering (HFE)

Major global operating companies are progressively adopting the human factors engineering (HFE) discipline to ensure quality, safety, and fit-for-purpose equipment and facilities. Human factors are all those considerations that enhance or improve human performance in the workplace and negate the possibility of human error. HFE is the design of work... read more →
Oct 29
Storage tanks

FlexiDrive under gas spheres

Our customer operates a butane plant, where individual canisters are loaded with butane. The butane spheres on site are located about 1 meter above the ground. Underneath these spheres there are 4 manual valves that must... read more →
Jul 24
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May 07
Sofis interns working on new customer applications

Internships

Sofis is part of the 'Process Safety' division of Halma Plc, an FTSE 100 company, which is an organization with 50 companies and 5,000 employees worldwide. Sofis is based in Alphen aan den Rijn and has the two market-leading brands of Netherlocks interlocks and Smith interlocks, which contain a range... read more →