Adding water to cleaning and rinsing tanks is inevitable in a cleaning process. Most modern machines include a means to sense liquid level and add more water or other appropriate liquid as necessary. It would seem simple enough, but there are a lot of factors to consider in managing liquid makeup. The first thing to determine is …
Wrong! I don’t think most of us would consider using motor oil to moisten our dry skin. By the same token, we wouldn’t use body oil in our car’s engine. The notion seems to persist in the cleaning industry, however, that oil is oil. We often neglect to differentiate between oils when it comes to developing or recommending a …
As a prolog to the following let me just say, as I may have said before in this blog, that being an engineer is both a blessing and a curse. A blessing because you intuitively understand how things work (or at least think you do) that other people see as magic, and a curse because …
Since DI water quality is critical to many cleaning processes, it is important to understand its behavior. In too many cases, the quest for numbers results in high costs in the use of DI water. In short, delivering super-high resistivity water does not always have a significant impact on the resistivity of de-ionized water in the ultimate application. …
De-ionized water is commonly used in both industrial and precision cleaning systems, primarily for rinsing. De-ionized water is a little like the speed of light or absolute zero in that you can never quite TOTALLY remove all the ions from the water (although we can get close) and, once a certain level of de-ionization is achieved, it …
Drying is almost always the longest step in a cleaning process. Because of this, anything that will speed up the drying process is of special interest to the process engineer. Hot air drying is, by far, the most common means of drying used in the industrial parts cleaning arena. Major variables in hot air drying are temperature, …
When a sound wave encounters an object or discontinuity in the sound conducting medium, at least part of the sound is reflected. The way the sound reflects depends in large part on the rigidity of the reflecting surface. If the object is hard, like a substantial piece of metal, the wave reflects as shown below. …
I’ve made reference in the blog before to the fact that some surfaces are good candidates for ultrasonic cleaning while others are either difficult or impossible to clean. In general, surfaces that are hard (metal, glass) are easily cleaned using ultrasonics while softer surfaces (rubber, soft plastic) resist ultrasonic cleaning. The reason has to do …
The final type of weir I’ll discuss in this series is the four-sided overflow weir in which liquid overflows all four sides of a process tank. This type of weir is normally found in equipment designed for “precision cleaning” applications and most commonly in rinses where efficient particle removal is a major consideration. The theory behind …
The concept and purposes of an overflow weir are pretty simple but making them perform for maximum benefit can be a challenge. For the best performance of a weir used in a skimming application, liquid should overflow the entire width of the weir. An area of stagnation is formed behind an area where there is no …
English
Spanish
Chinese
Canada
Mexico
United Kingdom
