Case Study

Anti-Surge valve upgrade at LNG plant in Europe

The Challenge

Every four days a ship, loaded with LNG, leaves the facility to call at ports around the world. IMI CCI have a partnership with the customer going back more than 25 years with IMI CCI valves installed at all of their major onshore and offshore facilities for critical applications. This facility has over 25 IMI CCI valves installed in critical applications.

The site’s engineering team approached IMI CCI to upgrade the IMI CCI valves supplied in 2003 which were for anti-surge applications. The 18” x 30” and 24” x 32” valves with 16” and 20” DRAG®​ trim were operated in compressor recycle mode and hot gas bypass mode which was outside the original design of the valve, this caused vibrations in low lift conditions. Such ​vibrations on valves of this large size can impact the valve and nearby equipment, therefore the need was identified to resize the valves to include the new operating conditions.

The Benefits of Custom-Designed DRAG® Disk Stacks for Valve Performance.

Typical DRAG® disk stack

The Solution

IMI CCI rose to the challenge with a custom-designed DRAG® disk stack that has a progressive Cv versus stroke curve and a tri-linear characteristic. The high number of stages during low lift of the valve provides velocity control, high resolution and better controllability of the flow conditions -eliminating the vibrations. The custom-designed DRAG® disk stack could be installed in the existing valve bodies thereby saving the LNG facility significant cost. ​

Related Articles

Blog

IMI’s Growth Hub turns its attention to steam trap monitoring

DISCOVER
Blog

New valve stem packing design makes reducing fugitive emissions EEEasy

DISCOVER
Company News

Study identifies significant emissions savings for aftermarket valve c

DISCOVER
Company News

Unlocking Future Potential: Ongoing success for IMI’s graduate scheme

DISCOVER
We will find someone in your region to speak to