Panametrics PanaFlow MV80, User Manual, Page: 41 / 184

PanaFlow™ MV80, MV82 & MV84 User’s Manual 29
Chapter 2. Installation
2.3.5 Insertion Procedure for Flow Meters with Removable Insertion Tool (cont.)
CAUTION!
The sensor alignment pointer must point downstream, in the direction of flow.
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.
1. Calculate the required sensor probe insertion length. 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 PTFE tape or pipe sealant to improve the seal and
prevent seizing on NPT style meters.
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 position.
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 insertion length mark scribed on the stanchion. Do not force the stem into the
pipe.
7. Tighten the packing gland nuts to stop leakage around the stem. Do not use a torque over 20 ft-lb.
8. Slide the stem clamp back into position, and torque stem clamp bolts to 15 ft-lb. Replace the stem clamp nuts
and torque them to 10-15 ft-lb.
9. To separate the insertion tool from the flow meter, remove the four socket head cap bolts securing the upper and
lower retractor brackets. Then, remove the insertion tool.