A passing valve was causing significant problems at a Montana refinery, where two out of three cooling pumps had reliability issues while the third was inoperable. The refinery was facing outages unless a suitable solution could be found. Furthermore, traditional interventions would require relatively major changes to infrastructure, including removal of roofing, due to accessibility issues.
The client, a Supermajor, had not used the Izomax AOGV mechanical isolation system previously – meaning that a detailed evaluation of the AOGV technology, engineered solution and all processes and procedures would be required.
The application was a high temperature environment with 400 degrees Fahrenheit, with internal pressure in the region of 725 psi.
All three cooling pumps were connected to the same main spools, so initiating maintenance work was only possible by isolating the passing valve. An additional consideration was the asbestos gasket which would require careful handling and disposal.