Sierra INNOVA-FLO 220 - Manual (Page 27)

Series 220/221 Instruction Manual Chapter 2 Installation
Insertion Procedure for Flow Meters with Permanent Insertion Tool
Figure 2-9. Flow Meter with Permanent Insertion Tool
1. Calculate the required sensor probe insertion length (see previous page).
Measure from the depth marker arrow down the stanchion and scribe a
mark at the calculated 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.
3. Loosen the two packing gland nuts on the stem housing of the meter.
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 position.
Caution!
The sensor alignment
pointer must point
downstream, in the
direction of flow.
4. 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.
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. Turn the insertion tool handle clockwise to insert the sensor head into the
pipe. Continue until the top of the upper retractor bracket aligns with the
insertion length position scribed on the stanchion. Do not force the stem
into the pipe.
6. Tighten the packing gland nuts to stop leakage around the stem. Do not
torque over 20 ft-lb.
IM-22 2-13