A return-on-investment calculation worksheet, supplied as an Excel spreadsheet module, allows users of pumps and motors to quantify the effectiveness of bearing isolators when applied to rotating equipment.

Once downloaded and completed, the worksheet from Inpro/Seal Co., Rock Island, Ill., allows plants to calculate their own ROI relative to the use of bearing isolators, including benchmarks of current repair costs and the effect of doubling the reliability of their rotating equipment.

To get the ROI, users plug in their respective numbers to benchmark the amount of repairs and maintenance dollars saved by installing bearing isolators. Data entered includes the number of pumps and motors in operation, bearing isolator per unit costs and the average mean time between failures (MTBF). The worksheet then calculates the actual costs of the bearing isolators, taking MTBF and previous maintenance histories into consideration.

According to the company, the benchmarks are conservatively based on more than 30 years experience working with end users, experience that has allowed the company to compile thousands of comparisons related to the use, installation and operation of bearing isolators on process equipment. It is available at www.inpro-seal.com, the company’s web site.