The Vacuum pump suffered catastrophic failure on a large UK refinery, classed as a high HPI incident as pumped medium is fuel vapour. Our client wanted a workable solution to prevent future failures that also could be rolled out to other Vacuum pumps on site. The Client also advised mechanical seal sleeve issues with these pumps.
Route cause of failure, identified as poorly cast impellers causing huge imbalance within pump, with multiple counter weights fitted. Sample impellers were reverse engineered and manufactured by Pinnacle Re-Tec to a much tighter casting tolerance ISO 8062 CT11-14. Additional material was also cast to centre of impeller hub to act as vane support.
O-ring grooves were machined into casing sections as an additional ‘preventative’ measure to prevent fuel vapour leak.
To improve sealing arrangement of the mechanical seal sleeve, a new key way was machined in shaft. A new mechanical seal sleeve was reverse engineered and manufactured to incorporate an o-ring groove in front of new key way location.
The Result & Benefits
Pinnacle Re-Tec has provided our refinery client with a “one-stop-shop” pump repair, incorporating reverse engineering and in-house manufacturing of all required parts, including upgrades to impeller design, mechanical seal sleeve and pump casing. The client has incorporated these pump design upgrades into other Vapour Vac pumps on the refinery, thus reducing HSE risk.
The Completed Vapour Vacuum Pump
A pdf version of this Case Study is available for download.
Privacy & Cookies Policy
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.