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Case Studies

Correcting Engine Skid Vibration

Background Compression of natural gas at gathering and transmission stations is commonly performed by engine driven reciprocating compressor systems. In the design stage, API


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Balancing of Forced Draft Fan

Problem This a case study of a forced draft (FD) fan that experienced high vibration due to unbalance and an impeller resonance near the


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Balancing of Gas Turbine

Problem This gas turbine had history of high vibration since commissioning 20 years ago. Previous balancing attempts were largely unsuccessful. The keyphasor (KP) was


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Axial Thrust Measurement in Vertical Turbine Pump

Problem EDI was requested to help perform an axial load test on a vertical water pump. Since commissioning, the pump experienced accelerated bearing and


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Identifying the Cause of Reciprocating Machinery Coupling Failure

Problem Weeks after commissioning, a compressor unit tripped on high motor vibration.  Upon inspection, cracks were found in the center piece of the coupling


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Eliminating High Frequency Pulsation and Vibration from a Screw Compressor

Challenge As part of the vapor recovery system in a refinery, a two-stage screw compressor was used to boost gas pressure prior to burning


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