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8.0 Retrieving MDS Stopper:
NOTE: Always equalize pressure
on both sides of the stopper before
deflation or removal.
After the work on the pipeline is complete,
equalize the pressure behind the MDS Stopper and
in front of the MDS Stopper.
This can be done in a variety of ways. Refer to
examples in Section 3.0 of this manual and your
gas company procedures.
Once pressure is equalized, open the inflation
valve of the MDS Stopper to deflate the stopper.
Pressure inside the pipeline will assist with the
evacuation.
Connect the hand pump to the stopper and pull a
vacuum on the stopper to make it as compact as
possible.
Unlock the gauge rod by operating the black
thumb screw.
Pull the gauge rod completely upwards. You may
need to use some force to do this.
Hint: If you feel some resistance and can't
move the rod further, push rod in slightly then
with speed and a 1/4 turn clockwise pull the rod
upwards.
Lock the gauge rod by operating the black thumb
screw.
* ALWAYS EQUALIZE PRESSURE *
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