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UNI-4300
Aluminum Soft Solder Kit with metal tip flux applicator. The
service technician is frequently confronted with the task
of repairing or joining aluminum to aluminum and aluminum
to copper or brass. A common repair problem occurs when an
Air Conditioning System's evaporator coil develops a small
pin hole leak. UNI-4300 is an excellent product for this repair
application due to it’s low melting point of 500 °F
(260 °C) and 20,000 PSI tensile strength.
 For
best results, carefully read and follow the steps listed below:
(1.) Prepare the tubing by cleaning the surface and
removing any oil, grease and oxides. To remove the oil and
grease, use a chemical solvent. The oxides should be removed
using only a stainless steel wire brush or emery cloth. Tubing
surfaces MUST BE CLEAN.
(2.)
When making a repair on an evaporator coil, it will be necessary
to preheat the tubing prior to applying the flux. A common
mistake when making this type of repair is to apply the flux
and then begin heating the tubing. The evaporator coil disperses
the heat and the tubing never reaches the melting temperature
of the alloy. The flux overheats and burns which then acts
as an inhibitor that doesn't allow the alloy to bond properly
to the base metal. Preheat the evaporator tubing and then
apply the flux using the metal tip flux applicator. (3.)
Continue applying heat until the flux starts to bubble and
then apply the UNI-4300 solder into the area being repaired.
 (4.)
NOTE: If the solder is having difficulty flowing or the
area has been overheated, “do not panic”. Simply
apply more flux using the metal tip flux applicator. Reapplying
the flux will clean the surface and allow the alloy to flow
and bond with the base metal. Allow the assembly to cool down
slowly. Remove flux residue with hot water and clean using
only a stainless steel brush.
Part#
P4KD9
UNI-4300
Almminum
Soft Solder Kit
with a 1 oz Flux Bottle |
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