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Becht Engineering Blog

In this section of the site contributing authors submit interesting articles relating to the various services, industries and research & development efforts of Becht Engineering.

Your pump's Mean Time Between Repairs (MTBR) is what?...Or what should it be...

Your pump's Mean Time Between Repairs (MTBR) is what?...Or what should it be...
Many of the tourist spots around the world have panhandlers. Some of the more creative ones stand on street corners advertising that they will tell you where you got your shoes, for a dollar. Of course it turns out that “you got your shoes” at the corner of Bourbon and St. Peters - or wherever you happen to be standing at the moment. It’s a play on words. However, being able to predict your pump Mean Time Between Repairs (MTBR) is not a play on words. Indeed it can be done quite accurately. I am often asked to do a facility rotating equipment reliability audit. After all, the plant’s management has heard that top tier plants have pump MTBR’s in excess of 100 months. They would be happy to have half that number. Hence the need to understand the major MTBR influencing factors. The main broad reliability categories that determine...
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Machinery Hurricane Flood Damage– Innovative Seal Recovery Procedure

Serious floods rarely occur in the life of a refinery or petro-chemical plant. But when such an event does occur there are significant implications for the reliability of rotating equipment and associated business risks when it's time to restart the plant. And because this scenario is so uncommon, there are few, if any, industry standards offering guidance or practical advice on the methods appropriate to ensure a cost effective and reliable restart of the facility. Two Becht Machinery Advisors, Stanley Fussell and Randy Passman, developed an industry-unique and innovative procedure for flushing and testing oil film and gas seals that allowed a client to successfully restart over two dozen major machinery trains following a serious flood, without having to replace a single seal system. The experience involved the serious flooding of a large chemical plant due to hurricane surge. The entire plant was submerged in up to ten feet of...
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Process Compressor Gas Seals

Process Compressor Gas Seals
This is the second article in a planned series where questions related to process machinery will be addressed. The intent of these articles is to answer general questions you may have about the machinery that you work with or manage on a daily basis. In each article we will address different systems associated with the operation and maintenance of process machinery. Your comments on this article would be greatly appreciated. Or, if you have suggestions for additional topics of interest, you can reach us via comment at the end of the blog. PROCESS CENTRIFUGAL COMPRESSOR GAS SEALS The purpose of this article is to outline the basic components and operation of a compressor gas seal system. Compressor process seals are designed to seal the rotating assembly in the stationary compressor case to prevent the process gas in the compressor from getting to the atmosphere and to prevent the atmosphere from...
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Changing of the Guards

The Becht Guys were recently involved with removing an existing large WPII (weather protected, internal air-cooled) electric motor and installing a new spare motor on a planned outage. This work was being performed in a petrochemical plant where we spent most of our careers. Many years ago we had developed a program to extend the MTBR of large WPII electric motors by installing efficient bearing seals and high efficiency air filters. The new motor did not have the efficient bearing seals or the high efficiency air filters. We suggested installing both and were informed that they were not needed because they do not have problems with dirt and oil build up in this motor. As we travel to different petrochemical complexes in America, we can't help but notice all the new faces in the machinery world and the absence of the faces that we used to know. It appears that...
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