Mechanical Seal Design Enhancements for Improved Reliability | John Crane скачать в хорошем качестве

Mechanical Seal Design Enhancements for Improved Reliability | John Crane

Presented By: Brian Kalfrin - Sr. Regional Engineering Manager – Americas Located in Alberta, Canada, one of the world's largest ethylene and polyethylene production complexes faced reliability issues with mechanical seals on ethylene product pumps. These pumps, classified as API 610 BB5 types, operate under extreme conditions with seal chamber pressures consistently exceeding 1,000 psig at sub-zero temperatures and shaft speeds surpassing 5,000 rpm. The existing setup utilized dual unpressurized mechanical seals supported by an API Piping Plan 11 and 52, achieving an 18-24 month mean time between repair (MTBR) through collaboration with the end user. During failure analysis, existing seal failures were attributed to the breakdown of the dynamic secondary sealing element, particularly the O-ring, which suffered severe abrasion. To counter this, John Crane recommended a new approach. The proposed alternative seal configuration incorporated active seal face features to enhance ethylene sealing. It also introduced a non-pusher secondary seal (NPSS) for both process and containment seals, addressing the O-ring concerns. Improvements were made to the circulation and cooling of the Plan 52 loop through computerized fluid dynamics (CFD) modeling of the internal circulation device and support system piping. These enhancements were integrated into a redesigned seal cartridge, which was successfully installed during a unit outage in September 2021. Despite process stream upsets, the performance of the new design has been remarkably satisfactory. For a deeper understanding of how this project unfolded and its impressive results, listen in on Brian Kalfrin, John Crane’s senior regional engineering manager, as he delves into the details in this webinar that sheds light on the collaborative efforts that made this achievement possible. #johncrane #mechanicalseal #mechanicalengineering Learn more about John Crane: Website: https://bit.ly/3XHpdnf LinkedIn:   / john-crane   About John Crane: We pioneer mission-critical mechanical seal and support systems, coupling and filtration technologies and solutions for the energy and process industries, enabling efficient and sustainable operations. As pioneers of progress, we are committed to leveraging our legacy of technology leadership, innovative solutions and service excellence to help customers achieve their net-zero ambitions. We’re fully committed to supporting global efforts that address climate change and are taking concrete steps to reach net carbon neutrality by 2050. Engineering a better future, today. The videos available on our YouTube channel, including those in webinar format, are openly accessible and intended for informational and educational purposes only. While we encourage the use of our content to enhance knowledge and skills, any use of these videos for educational purposes must be done with proper credit to John Crane. Please note that the use of these public videos is not the responsibility of John Crane and should not be considered as official training for our appliances. For official training and certification, please contact us directly. Unauthorized commercial use of our videos without prior written consent from John Crane is prohibited 0:00 Introduction 0:04 Case Study: Ethylene Product Pump 7:08 The original seal's failure modes and systems 9:34 Inner Seal Comparison-Original vs Proposed 15:24 CFD Analysis-API Plan 11 Flush Flow Guide 17:04 Boundary Conditions for CFD Analysis 19:40 Existing CFD Outputs: Calculated Flow Rate: 16 GPM 21:45 Proposed CFD Outputs: Calculated Flow Rate: 18 GPM 24:35 Containment Seal Modifications 29:15 API Plan 52 Support System Analysis 30:31 Pumping Ring Iterations for Analysis 31:21 Pumping Ring Iteration Results 36:14 Finished Design