Initial Actuator Settings; Table 6.1 Preferred Copper Tube Properties - Branson Emerson Ultraseal 20 Operating Manual

6.2

Initial Actuator Settings

When properly set up the Ultraseal 20 System will produce quality seals by simply placing
the appropriate tubing against both tube stops and actuating the start switch. Consistent
quality tubing is important to maintaining a reliable process. The following material
specification is recommended and will produce the most reliable results.
6.2.1 Tube Specifications

Table 6.1 Preferred Copper Tube Properties

Material
C12200
The material should conform to ASTM B 280-88 or 95A
Temper:
"O" Soft annealed to 50-60
Tensile strength 17,000 psi
Yield Strength 11,000-13,000 psi
% Elongation 40-50
Grain size 0.1 micron max.
Hardness, Rockwell 15T scale 42-46
• The tube should be free from cracks or tears on the outer surface when bent 180° around a plate
with thickness 1.5 times the I.D. of the tube
• The tube should be free from excessive porosity or grain boundary inherent to hydrogen
embrittlement or physical structure indicating any segregation of grain boundary, when subject
to the following:
• Tubing shall be heated at 850 +/- 25° C for 30 minutes in a hydrogen environment. It may be
etched with FeCl
• The location of the weld should ideally be at least 3" (75mm) away from any brazed joint in the
refrigeration system. This will minimize the effect of the heat hardening and oxidation which
takes place during brazing
6.2.2 Factory Air Source
Factory air must be turned on, supplying the Controller's air pressure regulator with air
pressure. If factory air is too low (below 70 psi maintained) the actuator will not weld or
operate reliably. Factory air is also used to provide cooling air to the converter.
Factory air input may affect weld results for applications requiring more weld pressure
buildup.
DCM00051 REV. 10
Cu%
99.9 (min)
if necessary
3
P%
0.015-0.040 Not to exceed 0.10
Total Bi, Pb, P
content%
55