Proper airflow is vital to personnel who are working with corrosive, hazardous, or volatile materials in a cleanroom. Safety hinges on proper fume hood exhaust monitoring; it alerts workers when the airflow drops below calibrated levels. In Part 1, we discussed some available options in fume hoods. With a fume hood selected, you can focus on maintenance, replacing equipment, and selecting the monitoring system.
Regular maintenance will likely be an annual or semiannual certification consisting of a velocity test with a thermal anemometer at predetermined points. The points depend on the size of the sash opening. The certification also includes calibrating the alarm and performing a smoke visualization test to prove airflow direction and smoke containment. In addition to certification, facility personnel should carry out scheduled checks on the blower motor belt.
Your fume hood monitor does not need to be … Read More »
What kinds of options do you have available when selecting a fume hood for your cleanroom? What else do you need to know?
When working in a cleanroom with corrosive, hazardous, or volatile materials, sufficient airflow is critical to personnel safety. Calibrated exhaust monitors typically have audible and visual alarms to alert workers when the airflow drops below calibrated levels. In addition to monitoring this airflow, exhaust monitor alarms can also indicate that there is a problem with the pressure. As you can see, it is imperative to have calibrated exhaust monitors for your fume hoods. We offer some quick tips on choosing and maintaining your fume hoods. First, a few words about your options:
Selections in Fume Hoods
There are numerous options for fume hoods. Among these, you will find two different airflow valve setups:
Variable Air Volume (VAV) – This can be … Read More »
You have numerous options for pretreatment methods for pure water, but what is the best combination to produce Type 2 water?
In our last post, we covered the six methods for pretreating water to make it pure for cleanroom purposes. This pretreatment is a vital stage in water purification, but it’s often overlooked. None of the methods will completely remove contaminants on its own, so it’s imperative that you find the right combination. While the exact best fit for you will depend on the application, there is one combination that is often the best to create Type 2 water: Reverse Osmosis (RO), and Electrodeionization (EDI).
To recap, RO is extremely useful in the first step of the purification process. It removes the majority of broad range of contaminants. Its efficiency, however, does vary among contaminant types.
EDI combines direct electrical current with ion … Read More »
Here is a look at the 6 kind of methods used to pretreat water in the purification process necessary to use it in a cleanroom laboratory.
There’s water purification that produces Type 1, or ultrapure water, but equally important is the pretreatment step that results in Type 2 water. Pretreatment actually removes most of the contaminants in tap water. This step needs to be relied upon consistently, yet it is often overlooked. To ensure your water is purified to the highest possible standard, be sure to use a combination of the following technologies:
Distillation. This removes a wide range of contaminants, but it requires large volumes of tap water and electrical energy. This method of purification is relied on much less today as contaminants are carried into the condensate.
Reverse osmosis. The efficiency of this method varies among contaminants, but it is capable … Read More »