Home » 2015 » September

Properly Selecting and Using a Cleanroom Vacuum

by Gerbig in General Cleanroom. Comments Off on Properly Selecting and Using a Cleanroom Vacuum

What you need to know about one of the most important pieces of equipment in your cleanroom.

We recently posted a comparison to help you choose between a central and portable vacuum system for your cleanroom. Once you decide which system is right for you, there are a few more things to know about picking out your vacuum.

Crucial Elements of the Equipment

The absolute first thing you must ensure is that your vacuum cleaner is HEPA-filtered. This is the only way to know that 99.97% of particles down to and including 0.3 microns are collected and retained.

Another critical piece of the filtration system is when the HEPA filter goes in. It should be installed after the motor to filter the exhaust stream. The commutator and carbon brushes in the motor generate dust; if the exhaust stream isn’t filtered, that dust will be … Read More »

Important Considerations for Cleanroom Vacuums

by Gerbig in General Cleanroom. Comments Off on Important Considerations for Cleanroom Vacuums

There are advantages to both portable and central vacuum systems for a cleanroom. Weigh your options with these comparisons.

When looking at everything needed to clean a cleanroom, the initial removal of dust and particles comes before sanitation. In critical cleaning situations, vacuuming tends to be a more efficient method than swabs and cloths. Measurements taken in a cleanroom setting show that dusting systems using disposable cloths polluted the space twice as much as a HEPA filtered vacuum cleaner.  Vacuums both retain particles inside the machine and eliminate fiber particles left behind by various wipers.

The first question you need to consider when choosing a cleanroom vacuum is: central system, portable, or both? While experts will argue for each option, the best choice for you depends on your application. Here are the pros and cons of the two systems:


PRO: Personnel can effectively … Read More »

How to Swab Cleanroom Surfaces in a Reproducible Manner

by Gerbig in General Cleanroom. Comments Off on How to Swab Cleanroom Surfaces in a Reproducible Manner

Validation relies on meticulous and accurate testing. When swabbing for residue samples, follow this advice for reproducible results.

If you consider cleaning validation a three-step process, it will involve 1) cleaning/rinsing of necessary surfaces, 2) sampling any residues left behind after step 1, and 3) analyzing your samples. The greatest challenge in this 3-step process is ensuring that step two is carried out in a highly reproducible manner. If it isn’t, the analysis won’t truly represent the condition of the sampled surface.

To accomplish reproducibility, you want to focus on four things:

Thorough completion of step one
Use the proper swab
Wet the swab correctly
Swipe the area consistently

The first step above is rather obvious. If you can actually see particles on any surface, you need to clean it. The residues you’re testing are invisible to the naked eye. Moving on to the second area of … Read More »

3 Tips on Testing for Fungal Control in Cleanrooms

by Gerbig in General Cleanroom. Comments Off on 3 Tips on Testing for Fungal Control in Cleanrooms

There is a lot to consider when taking action to control fungus in a controlled environment. Make sure you know these three tips.

Recently, we posted about controlling fungus in cleanrooms.  This is a tricky subject because it depends on the form of fungus, the surface type, and environment specific to your controlled environment. We ended the series with suggestions on the kinds of test you should perform. Here is some additional information to help with that process.

Suspension tests:

It is worth noting that there are many published methods to determine fungal activity in suspension or carrier tests. You can find general test procedures to use for fungicidal activity testing in the BS EN methods (1650 and 13697) established by the European Committee for Standardization and the AOAC. However, these methods are specifically used by disinfectant manufacturers to register a product for … Read More »