How Does Trublu Work; The Science And The Math (+%#-++/+%??) - AccuTools TruBlu User Instructions

TruBlu hoses are dedicated evacuation hoses and should never be used
as refrigerant transport hoses or for positive pressure application. Oils
used in refrigeration applications also have an affinity for moisture.
Moreover, oil coating the hose lining significantly impacts the evacuation
speed due to desorption of moisture which occurs in vacuum.
Buy a BluVac Micron
+
Gauge and Use the Free
BluVac App!
TruBlu hoses work with most any vacuum gauge,
however we strongly recommend the Accutools
BluVac+ models to take advantage of the free
BluVac App. The BluVac App offers guidance,
education, reporting, and diagnostics to assist and
document the evacuation process.
The BluVac Application supports BluVac+ Pro, BluVac+ LTE, and the BluVac+ Micro.

How Does TruBlu Work?

If you want the short answer, pretty darn good and freaky fast! If you want to know the science, and the
math read below. If you hate math and just want to believe us, skip to the Getting Started section following
this section.
The Science and the Math
(+%#-++/+%??)
The first principle to remember is that evacuation accomplishes two key things; degassing, and dehydration.
Degassing is the removal of air and other gasses. Dehydration is the removal of water and water vaper.
Degassing happens fairly quickly, while dehydration requires a much deeper vacuum and more time. TruBlu
hoses accomplish both in a fraction of the time of typical hoses. What's the secret sauce? Trublu hoses actually
achieve lower evacuation targets than our competitors' hoses. The deeper the evacuation, the faster the job.
To have flow in a line, there has to be a pressure difference. When evacuating atmosphere from a system,
the pressures become so small that the flow becomes minute. If the pressure at your vacuum pump inlet for
example is 500 microns (.009 psi), and in your system outlet 700 microns (.013 psi) the pressure difference
across the hose is .004 psi or 4/1000th of a psi. With pressures so small, the friction created by small lines
can have a huge impact on flow.
The friction created by the connecting lines is measured by "Conductance Speed". Conductance is simply the
maximum attainable flow through a hose at a stated average pressure. Where in a pressure system we refer
to pressure losses as "Pipe Friction Loss" in vacuum we refer to these losses as Pressure Drop. Specifically,
we are referring to the pressure drop created by the friction in the connecting hoses. As can be seen by the
quote below, Conductance Speed in evacuation is nothing new. As an industry, it is something we simply
seem to forget.
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