Special Operations - Vertical Fusion (Movable Pipe Above)
5 - 5
Check Alignment
Move the carriage until ends of pipe butt together.
Check pipe joint for proper alignment.
Do not use finger to check for HI/LO (misalignment). The
unit is under pressure, and slippage could result in crushed
fingers. Always keep hands clear of the jaw area.
If pipe is not lined up, tighten the inner jaw on the high side to bring into
alignment.
IMPORTANT:
Always tighten the side that is higher, never loosen the low side.
When the pipe is properly aligned tighten outside clamps to insure against
slippage.
Ensure there is no unacceptable gap between the pipe ends. If there is an
unacceptable gap or if the clamp knobs were tighten, insert facer and reface.
NOTICE:
When clamping, do not over-tighten the clamp knobs because
machine damage can result. Check to see if there is space between the upper
and lower jaws. If the two jaws are touching, do not continue to tighten.
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Set Hydraulic Pressures
The weight of the top pipe will be pushing down on the carriage. This extra force
must be taken into account when setting pressures for vertical fusion.
Set Heating (Drag) Pressure:
1) Close the carriage.
2) Shift pressure selector control to heating (drag) pressure.
3) Adjust the heating pressure reducing knob to its lowest setting.
4) Move the carriage directional control to open position.
5) Adjust the pressure reducing knob until the carriage moves up, then adjust
down until the carriage stops. Then adjust the pressure reducing knob down
until the carriage moves down, then adjust up until the carriage stops.
6) Repeat steps 1-5 to verify the heating (drag) pressure.
The heating pressure will represent the same as drag pressure on a horizontal fusion.
NOTICE:
Setting the proper heating (drag) pressure will prevent the carriage from moving
away or moving toward the fusion joint resulting in a improperly made fusion joint.
Set Facing Pressure:
Turn the facing pressure reducing knob up until the carriage can lift
the pipe quickly (facing pressure will be higher than heating pressure).
Set Fusing Pressure:
To calculate the vertical fusion pressure, calculate the theoretical
fusion pressure and subtract the heating pressure. The heating pressure must be
subtracted or the weight of the pipe will apply too much force and squeeze out the melt.
Set fusing pressure to the absolute value of the calculation.
Vertical Fusion Pressure = Theoretical Fusion Pressure - Heating (Drag) Pressure.
IMPORTANT:
Follow the appropriate heating and fusing procedure based on either a positive or negative vertical
fusion pressure calculation.
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0
100
200
300
400
500
600
700
800
900
1000
DIRECTIONAL
CONTROL
VALVE
FACING
PRESSURE
HEATING
PRESSURE
FUSING
PRESSURE
SELECTOR
VALVE
CD013
39-10
-5-15
FUSES
MOTOR
POWER
SUPPLY
CD018
92
-12
-0
7-16
Acrobat HPU
DynaMc EP HPU
Summary of Contents for A714201
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