When parts aren’t coming clean two of the first things most process engineers target as potential problems are the temperature and concentration of the chemistry. These are, in most cases, good bets but one should resist knee-jerk reactions. Chemical Concentration – One of the common knee-jerk reactions to a cleaning problem is to increase chemical …
Surface cavitation erosion of ultrasonic transducers is a topic that users and manufacturers of ultrasonic equipment would often rather not talk about – – but we must. The erosion of a transducer surface due to surface cavitation is inevitable over time. Its severity depends on several factors, some of which can be controlled and some …
In the preceding blog I indicated that liquid in process tanks can be heated by the effects of ultrasonics and pumping as well as by surface-mounted or immersion heaters. The fact is that some process tanks may require cooling, not heating, to remain at the desired temperature. Since we have looked at the possible sources …
We all know that temperature is an important parameter in cleaning and cleaning-related processes. Too little and cleaning will be ineffective. Too much can lead to possible chemical separation, part degradation and loss of ultrasonic cavitation. So providing the proper temperature is mandatory for the best cleaning result. Sounds easy? Well, yes and no – consider …
So, the goal is to get the air out of the system so that the pump can operate properly. In the preceding blog I explained what factors might keep air from escaping from the inlet side of the pump. It would, then, be a logical question to ask, “Why doesn’t the air just go out the …
Let’s again look at the system schematic shown in the preceding blog. This time, however, it is shown with an “air lock.” The centrifugal pump, unable to pump air, is not able to move liquid to replace the air trapped in the plumbing system. At first glance, it may not be obvious how this condition …
The blog Pumps – Centrifugal Pumps provided some basic information about the type of pump most commonly used in industrial cleaning equipment. Centrifugal pumps are simple, relatively inexpensive, versatile and reliable. However, as I mentioned in that blog, they do have some limitations. In order for a centrifugal pump to function, liquid to be pumped …
As I said earlier, the cleaning equipment itself is often not the source of what is perceived to be a “cleaning” problem. It is understandable, however, that blame often falls on the cleaning process as it is during the cleaning process that the problem often first manifests itself. Once a problem is detected, the solution …
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