Rapid urbanization in the last 50 years and its effects are felt intensely. Undoubtedly, one of the most important processes of urbanization is water and wastewater management.
- Tumay Karaver
- Artesis Technology Systems
Variable frequency drives (VFDs) have become a preferred method of process control for electric motor driven equipment ranging from vertical water pumps to centrifugal air fans. The following is a basic discussion of risks of using a VFD with direct driven centrifugal fans and methods of mitigating those risks to maintain equipment reliability.
- David Sheffler
- IVC Technologies
Studies show that 50 to 70% of all equipment failures can be directly traced to a lubrication-related issue, most of which can be found with oil analysis.
This case study discusses the damaging effect water can have on an electric motor. Also discussed is the testing required to diagnose the problem with the motor and the cost savings by detecting and diagnosing the problem early.
- Noah Bethel
- PdMA Corporation
A small number of semiconductor manufacturers have overcome the noise, bandwidth and g-Range shortcomings commonly associated with MEMS sensors used in Condition-based Monitoring (CbM) by producing several medium and high-performance MEMS vibration sensors with the latter being comparable to piezo accelerometers.
- Chris Murphy
- Analog Devices, Inc
Water is one of the most destructive contaminants faced by industrial maintenance departments. Some systems may be more tolerant to water, while others can be more sensitive. Some manufacturers have set limits as low as 30 ppm. Best practice would tend to indicate that it is beneficial to keep water contamination at the lowest level possible..
- Heather Vercillo