Coupling manufacturers have an “acceptable” misalignment tolerance range that is typically much greater than precision shaft alignment tolerances. Why is that? Because flexible couplings are designed to allow for incidental movement of machines during operation. Seal manufacturers have very tight tolerances for allowable misalignment. Why? Because of how they seal. Typical mechanical seals have mating…
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Although it is not the millwright or mechanics responsibility to specify mechanical seal applications, it is a good idea to have a basic understanding of their purpose. This blog will give the basics of double and tandem mechanical seals. The double mechanical seal uses two mechanical seals (an inboard and outboard seal). They can…
Read MoreAt VibrAlign, we are in the precision maintenance business. Our tools, our training, and our people, are all about precision maintenance. While teaching the field alignment portion of our shaft alignment training, at a customer site, we went out to align a particularly troublesome pump. They didn’t think they were getting the life…
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One of the common misconceptions in industry is that precision shaft alignment is not needed when using flexible couplings. Studies have show that nearly 50% of all machine breakdowns is due to misalignment. So what happens to misaligned machines? Check out the recently added video to the VibrAlign You Tube Channel titled “5 Effects of…
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After completing a recent training class, I had opportunity to ask our customer what were some of the highest cost failures they experienced. The answer? Mechanical seal failures. Mechanical seals come in a wide variety of configurations and manufacturers. The cost of these seals can range from $1000 to $3000 per inch of shaft diameter.…
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