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

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

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

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

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

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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