Compression fitting
nut
Process adapter
fitting
Ball valve
Compression fitting
i
i
When removing the flow meter, be sure to hold the electronics enclosure firmly by
hand before unscrewing the compression fitting nut. Failure to do this will allow the
pressure in the pipe to suddenly and rapidly force the meter from the pipe potentially
causing serious injury. The meter could
also be damaged or break apart causing
a break in the seal with the resultant loss
of fluid from the piping system. The hand
effort required to hold the meter will be
0.44 times the pipe pressure.
Procedure:
1. Slowly unscrew the compression
fitting nut while maintaining a firm
grip on the enclosure to counteract
the effect of pressure in the pipe.
2. Once the nut is fully disengaged
from the threads, the meter will be
free to move. Carefully withdraw the
flow meter stem from the pipe until
the sensor head is fully inside the
process adapter fitting.
3. After the meter is completely
withdrawn, slowly close the valve to isolate flow.
NOTE:
At this point, the piping system is isolated, but the process adapter fitting
will contain a small volume of process fluid under pressure.
4. After the valve is completely closed, slowly unscrew the compression fitting from
the top of the process adapter fitting leaving the adapter fitting on the ball valve.
NOTE:
As the compression fitting is removed, pressure will be vented from the ball
valve.
5. For meters provided with the high pressure adapter fitting, disconnect the safety
cable at the bottom by removing the capture nut. Be sure to fully re-attach the nut
to the cable once the meter is removed from the pipe.
Model F-5400
INST
ALL
A
TION
11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax +1 (727) 442-5699 • [email protected]
F-5400 Thermal Mass Flow Meter Manual 12/16 - 2031 / 107032
Page 17
Removing the
Meter
Installation: Insertion Type
