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When parts are washed the parts themselves, as well as the basket they are in, carry some of the wash with them into the rinse tank. This “drag out” means that the rinse solution has to be constantly replaced or will simply become less and less clean over time. The biggest issue is not that […]
Why does spotting occur on parts after washing and DI rinse?
There are three ways that spotting can occur: If there is soil introduced with the rinse (ie: contaminants in the DI bath), If soil is introduced in the air stream (ie: either present in the atmosphere and blown onto the parts or circulated from the air supply into the heater and blown onto the parts), […]
What’s the difference between solvent based cleaning and aqueous cleaning?
There is an old saying when it comes to parts cleaning: “Like dissolves like”. This comes from the world of chemistry, and is really quite a simple and useful phrase to remember. In chemistry molecules are described as being polar or non-polar. (Think north and south pole on the Earth) Polar molecules have a polarity […]
How does a vapor degreaser work?
If you’ve ever been wearing glasses as you walked into an air-conditioned building on a hot summer day, you already have a good understanding of part of how the Vapor Degreaser process works. (For those in colder climates, walking outside while wearing glasses on a cold winter day is an even better example.) So, how […]
How does a rotary drum parts washer work?
A Rotary Drum Parts Washer is essentially a large “inside-out” screw. Small parts are fed into the opening and the continuous rotation or tumbling of the barrel causes the parts to travel along this auger from one end of the barrel to the other. As the parts travel through the inside of the barrel they […]
Is desiccant required in a vapor degreaser?
Desiccants are used to absorb the water found in humid conditions to reduce or eliminate condensation. It can also be added directly to liquids to absorb the water content from the fluid. We are used to seeing the small white bags of desiccant found in packaging for everything from shoes to electronic equipment. Most of […]
Why are automated systems easier to process validate than manual equipment?
Process control and stability are critical aspects to regulated medical device and aerospace processes. It is important to ensure that a process has input and output variable limits which are defined and fully tested during process design, Equipment Qualification (IQ), Operational Qualification (OQ) and Process Qualification (PQ) validation testing. Setting up a proper DOE (Design […]
What is ultrasonic degassing? How to degas ultrasonic cleaning tanks
Air and other gases dissolved in a cleaning solution will impact performance of ultrasonic cleaning tanks. Gases in the cleaning solution absorb some of the cavitation energy that would otherwise go toward cleaning, and thus reduce effectiveness. Removal of these gases from the cleaning solution will result in maximum ultrasonic cleaning performance. The process of […]