Six Sigma – Monitoring Variables in Cleaning – Part 3 (final)

A few more things to monitor – Dirty rinse – An effective rinse is critical to most cleaning processes.  Only in very limited cases can residues from the cleaning step be left on parts after they are cleaned.  It does not, of course, do any good to clean the parts if they become re-contaminated by a …

Ultrasonic Cleaning – Benefits of Agitation

I have written before that there are four major variables we consider in cleaning – – Time, Temperature, Chemistry and Agitation. Based on some recent feedback from the field, however, I guess I need to provide a little more emphasis on the benefits and definition of agitation as it relates specifically to ultrasonic cleaning processes. …

Ultrasonic Cleaning Time – Enough is Enough

In The BIG Four, I talked about the four important variables in cleaning. These are time, temperature, chemistry and agitation. In that blog, I mentioned that a shortcoming in one variable can, to a point, be overcome by changing another of the variables. For example, increasing temperature or changing chemistry may reduce the time required …

Six Sigma – Process Selection and Monitoring

In order to achieve six sigma results, one must evaluate, measure and statistically control ALL phases of the cleaning process.  A typical cleaning process is comprised of three main stages – – washing, rinsing and drying.  Each of these must be addressed and controlled separately as any one of the three being out of control …

Six Sigma – – The Role of Cleaning

Achieving Six Sigma Capability Parts Washing “Six Sigma” methodology is one of many tools that can be used to improve process efficiency.  The following several blogs are excerpted from an article written by Dale Bowden of the Cleaning Technologies Group and was published in Process Cleaning Magazine.  Mr. Bowden specifically explores the role of cleaning …

Plumbing for High Purity Applications

Just about everyone can recognize the benefits of sterilization to eliminate bio-burden in a plumbing system. Heat or chemicals toxic to living organisms are periodically introduced to kill the offending critters. This process can be conducted using either CIP (Clean In Place) or COP (Clean Out of Place) procedures. CIP simply means cleaning by flushing …

“Sanitary” vs. “High Purity” Plumbing

Previous blogs have addressed what might be called the universal or common requirements for sanitary plumbing. Although obviously important, things like selecting the right materials and surface finishes are only the beginning of designing a system which is compliant with the requirements for a sanitary system as they may be defined by a particular user. …

What is “Sanitary Plumbing?”

As revealed in the preceding post, the material of construction is a critical factor in the design of “sanitary” plumbing.  Although the selection of material is important, there are other considerations that are equally important in the design of a system that will resist contamination. Surface Finish – Surface finish can have a significant influence …