GE PanaFlow MV80, Руководство пользователя

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PanaFlow™ MV80 & MV82 User’s Manual 25
Chapter 2. Installation
2.3.4 Insertion Procedure for Flowmeters with Permanent Insertion Tool (cont.)
Note: If line pressure is above 500 psig, it could require up to 25 ft-lb of torque to insert the flowmeter. Do not
confuse this with possible interference in the pipe.
1. Calculate the required sensor probe insertion length (see
Example 1
on page 23 ). Measure from the depth
marker arrow down the stanchion and scribe a mark at the calculated insertion depth.
2. Fully retract the flowmeter 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. 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.
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.
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 use a torque over 20 ft-lb.
CAUTION!
The sensor alignment pointer must point downstream, in the direction of flow.