Toshiba HWS-1402H-E, HWS-802XWHT6-E, HWS-802H-E Fig Prevention of oxidation during brazing

5)Use the reducing valve to adjust the nitrogen gas flow speed to 0.05 m3/hour or 0.02 MPa (0.2 kgf/cm2).

6)After the steps above, keep the nitrogen gas flowing until the pipe cools down to a certain extent. (Temperature where the pipe is cool enough to be touched by hands)

7)Remove the flux completely after brazing.

Fig 2-5-1

Prevention of oxidation during brazing

M

Flow meter

Stop valve

Nitrogen gas cylinder

From nitrogen cylinder

Pipe Nitrogen gas

Robber plug

14