Swagelok 8HPH Series, User Manual

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Series 8HPH Weld Head User’s Manual 19
Verify the Alignment of the Work
The series 8HPH weld head allows the user to verify work piece
alignment while fixtured. To check the weld joint BEFORE initiating the
weld sequence:
1. Open the arc shield by pushing down on the thumb tab.
See Figure 28.
2. Release the tab to have the arc shield return to the closed position.
3. Program the power supply as instructed in the power supply
manual.
4. Press PURGE to begin shielding gas flow. The shielding gas
should remain on at all times when using the weld head.
5. Check the shielding gas flow rate. Proper shielding gas flow for this
weld head is 10 to 15 std ft3/hr (4.7 to 7.1 std L/min).
6. Verify the arc shield is in the closed position. See Figure 29.

WARNING!
CLOSE ARC SHIELD BEFORE
BEGINNING WELD . USER COULD
BE EXPOSED TO THE UV RAYS OF
THE ARC IF THE ARC SHIELD IS NOT
CLOSED DURING WELDING .
Caution!
Quality of the weld could be
affected by an open arc shield
during welding .
Caution!
Provide support to the purge tube
and heavy work pieces to prevent
an unacceptable weld, damage
to the series 8HPH weld head, or
both .
Figure 28 Arc Shield Open
Figure 29 Arc Shield Closed
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