Meriam 70H_72H High Pressure Wet Tap Accutubes with Integral 3-Valve Head and Optional RTD - Manual (Page 22)

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4.7.5.3 Double support wet tap Accutubes include a specially machined
insertion cone on the end of the probe. Be sure that the flow sensor is
fully inserted into the opposite side support plug and not simply resting
on top. Rotating the probe and/or the plug while inserting the probe
will aid in alignment. Be sure to retighten the plug and provide
clearance as described in 4.7.2.20 to 4.7.3.22 for socket drive wet taps
or as described in 4.7.3.12 to 4.7.3.15 for gear drive wet taps.
4.7.5.4 All other instructions for the standard models apply.
Job #_______________________________
Item # __________
Model # _____________________________________
Maximum Insertion/Retraction Flow Rate __________
4.7.6 RETRACTION PROCEDURE 1/2”, 1” AND 2-3/8” DIAMETER PROBES
WITH SOCKET DRIVE
4.7.6.1 Close both instrument valves on the probe head.
4.7.6.2 Vent/depressurize the instrument connection lines and disconnect from
the probe valves.
4.7.6.3 Retract the probe by rotating the lower drive nuts in a clockwise
direction looking down from the probe head. Rotate each of the nuts a
small amount alternately so that the probe is forced out evenly from
both sides. If the pipe line pressure is not high enough to force the
probe out of the wet tap assembly as the nuts are rotated, use the upper
drive nuts to force the probe out. If the upper drive nuts are used, the
lower drive nuts should be unthreaded down the run rod an inch away
from the flange.
4.7.6.4 Continue the retraction of the probe until the lower drive nuts are
positioned on the thread rod 1” from the end of the thread rod.
NEVER UNTHREAD THE LOWER DRIVE NUTS FROM THE
ROD UNTIL 4.7.7.6 IS COMPLETE!
4.7.6.5 Close the insertion valve.
4.7.6.6 Depressurize the wet tap assembly by cracking open the instrument
valves. A short burst of line fluid will escape from the valves as the
wet tap assembly depressurizes.
4.7.6.7 Loosen the packing gland assembly cap screws.