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Chapter 2 Installation Series 220/221 Instruction Manual
Insertion Procedure for Flow Meters with Removable Insertion Tool
Figure 2-10. Flow Meter with Removable Insertion Tool
1. Calculate the required sensor probe insertion length. Measure from the
depth marker arrow down the stanchion and scribe a mark at the calcu-
lated insertion depth.
2. Fully retract the flow meter until the sensor head is touching the bottom
of the stem housing. Attach the meter assembly to the two inch full-port
isolation valve, if used. Use Teflon tape or pipe sealant to improve seal
and prevent seizing on NPT style.
Caution!
The sensor alignment
pointer must point
downstream, in the
direction of flow.
3. Remove the two top stem clamp nuts and loosen two stem clamp bolts.
Slide the stem clamp away to expose the packing gland nuts.
4. Loosen the two packing gland nuts. Loosen the stem lock bolt adjacent to
the sensor alignment pointer. Align the sensor head using the sensor
alignment pointer. Adjust the alignment pointer parallel to the pipe and
pointing downstream. Tighten the stem lock bolt to secure the sensor po-
sition.
Note
If line pressure is above
500 psig, it could require
up to 25 ft lb of torque to
insert the flow meter.
Do not confuse this with
possible interference
in the pipe.
5. Slowly open the isolation valve to the full open position. If necessary,
slightly tighten the two packing gland nuts to reduce the leakage around
the stem.
6. Turn the insertion tool handle clockwise to insert the stem into the pipe.
Continue until the top of the upper retractor bracket lines up with the in-
sertion length mark scribed on the stanchion. Do not force the stem into
the pipe.
2-14 IM-22