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Kleiss MCS60-1016 System Manual v.15 June 2020
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www.MainlineControlSystems.com
Prior to stopper inflation, verify system / pipeline
pressure is displaying on proper gauge (not more
than 60 psi).
The MDS Stopper inflation pressure gauge will be
indicating a negative pressure.
Inflate the stopper to 120 psi via air compressor
or nitrogen source. Inflate stopper as rapidly as
possible to ensure the best seal on pipeline wall.
NOTE: If 120 psi is not obtainable, then inflate to
a minimum of 2 times system pressure to achieve
stop off.
Install safety fitting on inflation pressure port.
Allow the stopper to stabilize inside the pipeline
for at least 10 minutes.
Evacuate or purge pipeline work area. Use the by-
pass / vent port on tower and vent stack, if desired.
(Do this in accordance with your gas company
procedures.)
Verify inflation pressure and system pressure
remains stable.
You may now start your work on the pipeline.
NOTE: Continue to monitor gauges on stopping
towers.
