C6.2.15/0815/E
15
Heat area 2 until braze temperature is attained, moving the torch up and down and rotating
around the tube as necessary to heat the tube evenly. Add braze material to the joint while
moving the torch around the joint to flow braze material around the circumference.
After the braze material flows around the joint, move the torch to heat area 3. This will draw
the braze material down into the joint. The time spent heating area 3 should be minimal.
As with any brazed joint, overheating may be detrimental to the final result.
To disconnect:
Heat joint areas 2 and 3 slowly and uniformly until the braze material softens and the tube
can be pulled out of the fitting.
To reconnect:
Recommended brazing materials: Silfos with minimum 5% silver or silver braze used on
other compressors. Due to the different thermal properties of steel and copper, brazing
procedures may have to be changed from those commonly used.
3.7 Shut-off valves and adaptors
CAUTION
Leaking system! System breakdown!
It is strongly recommended to
periodically re-torque all pipe and fixing connections to the original setting
after the system has been put into operation.
Figure 24: Adaptors and shut off valves
Braze connections can be converted to Rotalock by means of adaptors. Rotalock shut-off valves
are available for the suction as well as discharge sides. Using either straight or angled adaptors
provides a way to convert a Rotalock into a brazing connection.
Refer to
Table 3
for proper tightening torques:
Connection
Torque [Nm]
M10
45-55
Rotalock ¾"
40-50
Sight glass 1 ¼" Summit
100-110
Rotalock 1 ¾"
170-180
Rotalock 2 ¼"
190-200
Sight glass fitting
30-45
Mounting bolts 5/16”, M9
27 max
2
Table 3
NOTE:
More information about adaptors and shut-off valves can be found in the "Spare
parts list".
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