Reliability Improvement Of Magnetic Drive Pump For Special Services
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We, SKI, had used successfully the sealless pumps such as magnetic drive pump and canned motor pump in order to meet the environmental regulation for clean service. Based on successful experiences for many years, magnetic drive pumps have been aggressively applied to improve the seal life for special services such as sulfur, caustic, ammonia, etc since 2005. The magnetic drive pump has been preferred because of various advantages (easy maintenance, robust design, leak free, etc). However, we have faced important and didactic issues due to inappropriate operating procedures, protection systems and design. Unless the application and operation are taken into a consideration for special services like as molten sulfur and ammonia, the consequences of pump failure could result in devastating damage to pump parts and even fire. This case study will show how the bad actors were improved, lessons learned and guidelines for reliable operation. Users are reluctant to apply protection systems fully compliant with API685 or vendor recommendations for non-hazardous services based on economic considerations. But they should consider providing minimum protection systems for special services, if not for all pumps.
Kim, BumSu; Lee, SangJu (2014). Reliability Improvement Of Magnetic Drive Pump For Special Services. Turbomachinery Laboratories, Texas A&M Engineering Experiment Station. Available electronically from