Chapter 2 Installation | Series |
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Insertion Procedure for Flow Meters with Removable Insertion Tool
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.
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 calculated insertion depth.
2.Fully retract the flow meter until the sensor head is touching the bot- tom of the stem housing. Attach the meter assembly to the two inch
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 adja- cent 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.