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Title: Turbine Meters In Dirty Gas Applications
Author: Daniel W. Peace
Source: American Gas Association 1999
Year Published: 1999
Abstract: Field tests have shown that turbine meters with sealed and permanently lubricated rotor shaft bearings provide long service life, reduced maintenance, and accurate measurements in very dirty gas environments. Considerations that led to the development of meters with these new bearings are provided, (i.e., extraordinary dirt accumulation, grit and debris damage, bearing contamination, and bearing wear). Data defining the minimum expected operating flow rates, pressures, and gas temperatures to ensure optimum accuracy of meters with these new bearings are shared. The Auto- Adjust Turbo-Meter is ideally suited to use these new bearings. An alternative to spin testing for evaluating bearing wear was developed and is described. This new test makes use of periodic measurements of rotor wobble and end play. Finally, it is shown how the Auto-Adjust was able to detect and compensate for accuracy effects despite extraordinary dirt accumulation and bearing contamination or wear.

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