New projects, plant expansion and plant modernization

Zero issues means zero delay; specialized project management and specialist knowledge avoids unwanted project delays and hand-over problems.

Saving money on the short and longer term, by not compromising on quality

Facilitating ‘right first time’ installation and (re)setting of valve interlocks enab;les you to prevent issues that can lead to project delays.

Sofis provides skilled and trained staff with specialist knowledge and an in-depth understanding of valve operation sequences. Our engineers assure correct installation and setting of interlocks, avoiding integrity problems that cause unsafe situations and unnecessary downtime.

Acknowledging the need for specialized support in each project phase, avoiding issues
and delay

Plant expansion, modernization and process upgrading projects of oil refineries, gas processing plants, and petrochemical assets are complex and large-scale projects.

EPC contractors provide engineering, procurement, and construction services to support these significant upgrades and expansion projects.

Such projects require specialized project management to avoid unwanted project delays and hand-over problems.

Installation and commissioning of valve interlocks – often safeguarding critical applications – requires specialist knowledge. From planning to execution, Sofis successfully executes your large installation and commissioning projects.

Discuss your project support requirements

New project support

We offer specialized project management, and provide skilled and trained staff with specialist knowledge. Our engineers have an in-depth understanding of sequences and correct installation and setting of interlocks. Our project support aims to avoid integrity problems causing unsafe situations and downtime.

Pre installlation planning of large valve interlock order

Collecting valve topworks dimensions

Save time consuming and error prone process of information gathering at your valve suppliers.

Our engineers assure a correct fixation of the system, avoiding additional cost for extra material due to incorrect valve top works data.

Valve interlock installed on valve

Installation and commissioning

Assure yourself of a secured planning during the installation phase.

A smooth installation of your valve safety systems leads to the shortest installation time possible. Moreover, the standard Sofis commissioning report indicates your systems’ functionality is according to specifications.

Valve interlock installation training


Focus on ‘right first time’ installation and ensure correct valve top works information gathering at your valve suppliers.

Experienced and highly skilled Sofis service engineers help you maintain the highest quality level during installation. If required, small adjustments can be made on-site.

Sofis service engineers 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 managed and led by a Senior Service Engineer of Sofis.

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