Spirax Sarco RIM20, Инструкция по установке и обслуживанию, Страница: 23 / 132

IM-P198-05 MI Issue 2 23
Caution!
The sensor alignment pointer must point downstream, in the direction of flow.
Note
If line pressure is above 34.47 bar g (500 psi g), it could require up to
33.895 N-m (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 previous page). 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 DN50 (2") 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.
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 torque over
27.116 N-m (20 ft-lb).