Analysis of High Vibration Causing 211-P-25A Centrifugal  Pump Damage in Hydrocraker Process

Eflita Yohana; Bachtiar Yusuf; Muhammad Arrafi Lazuardi; Mohamad Endy Julianto; Vita  Paramita

Authors

Eflita Yohana Department of Mechanical Engineering, Diponegoro University, Jl. Prof. Sudharto, SH., Semarang 50275, Indonesia
Bachtiar Yusuf Department of Mechanical Engineering, Diponegoro University, Jl. Prof. Sudharto, SH., Semarang 50275, Indonesia
Muhammad Arrafi Lazuardi Department of Mechanical Engineering, Diponegoro University, Jl. Prof. Sudharto, SH., Semarang 50275, Indonesia
Mohamad Endy Julianto Department of Chemical Engineering, Vocational School, Diponegoro University, Jl. Prof. Sudharto, SH., Semarang 50275, Indonesia
Vita Paramita Department of Chemical Engineering, Vocational School, Diponegoro University, Jl. Prof. Sudharto, SH., Semarang 50275, Indonesia

Keywords:

High Vibration, Internal Recirculation, Cavitation, Centrifugal Pump

Abstract

The more developing technology enhances the need for energy; this requires the maximization of the performance of power plant components and energy. Refinery Unit (RU) is currently one of the real applications. Reliable equipment is required in running a massive industry. In running the oil production process at Refinery Unit (RU), the thing that needs to be put into consideration is pumps. A pump is a device for distributing fluids from one place to another. In Refinery Unit (RU), the pump is not only for oil but also for other fluids. In this research at Refinery Unit, the pump that is to be discussed is a centrifugal pump 211-P-25A. The objective of this research is to analyze the damage of pump 211-P-25A, which indicated high vibration. This causes the pump not to work optimally, so it requires the right maintenance. The research is done by using an analytical method, visual observation towards impeller and shaft, and comparing the results in accordance to API 610. Afterwards, the right maintenance will be known for centrifugal pump 211-P-25A to reduce the high vibration that occurred in the pump. High vibration may be caused by cavitation and internal recirculation. The damage in pump 211-P-25A is caused by repeated internal circulation, which causes damage to the impeller and high-speed shaft. Pump 211-P- 25A experiences high vibration due to low flow. The flow produced is 2.67 m3/h, with a pump design minimum flow of 8.6 m3/h. This causes damage to pump components. Due to this damage, the performance of the pump will not be optimal, and its efficiency will be reduced.