Molten Urea Transfer Pump Seal Failures
Urea melt pumps had been a reliability concern since commissioning (1992). Majority of the concerns were related to the failure of mechanical seal. Unexpected failures of seal were encountered during plant startups or during pump changeover. It resulted in a major reliability concern as the continuity of operation of plant had been at stake. Also huge expenses were incurred as damaged seal caused other parts to fail. A typical overhaul costs around USD 10,000. This Case Study highlights the identification of Failure Modes and steps taken to resolve the issues pertaining to seal reliability on this service.
Moin, Danish (2018). Molten Urea Transfer Pump Seal Failures. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from