Meriam 70H_72H High Pressure Wet Tap Accutubes with Integral 3-Valve Head and Optional RTD User Manual
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4.7.6.8 The Accutube may be left in this position (properly supported)
prepared for future insertion or for removal from the wet tap assembly.
There are two methods of removing the probe from the wet tap
assembly.
4.7.6.8.1 Withdraw the probe completely out of the packing gland
assembly and set aside.
or
4.7.6.8.2 With the probe still in the wet tap assembly, unthread the cage
nipple from the valve (unbolt the flanges in the case of 2-3/8”
probe diameter models), treating the cage pipe, packing gland
assembly and probe as an assembled unit. When the nipple is
removed from the valve, the entire assembly can be simply
lifted and removed. This procedure allows removal of probe
in situations where minimum overhead clearance is available.
4.7.7
RETRACTION PROCEDURE ½”, 1” AND 2 3/8” DIAMETER PROBES
WITH GEAR DRIVE
4.7.7.1 Close both instrument valves on the probe head.
4.7.7.2 Vent / depressurize the instrument connection lines and disconnect
from the probe valves.
4.7.7.3 Remove locking rod from crank handle.
4.7.7.4 Retract the probe by rotating the crank handle clockwise.
4.7.7.5 Continue the retraction of the probe until the threaded rods reach their
mechanical stop.
4.7.7.6 Insert locking rod.
4.7.7.7 Close the insertion valve.
4.7.7.8 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.
4.7.7.9 Loosen the packing gland assembly cap screws.
4.7.7.9.1 Withdraw the probe completely out of the packing gland
assembly and set aside.
or
4.7.7.9.2 With the probe still in the wet tap assembly, unthread the cage
nipple from the valve (unbolt the flanges in the case of 2-3/8”
probe diameter models), treating the cage pipe, packing gland
assembly and probe as an assembled unit. When the nipple is
removed from the valve, the entire assembly can be simply
lifted and removed. This procedure allows removal of probe
in situations where minimum overhead clearance is available.
4.8
ACCUTUBES WITH DIRECT DP TRANSMITTER MOUNT INSTRUMENT HEAD,
INSERTION MODELS 40H – 43H AND WET TAP MODELS 70H & 72H