Fluid Components International FLT93 Nuclear - Manual (Page 13)

FLT ® Series FlexSwitch TM INSTALLATION
Fluid Components International LLC 13
Packing Gland Assembly
1. Threaded or fl anged packing gland mounts are available. The valve assembly with appropriate connections are customer supplied. Fol-
low the male NPT mounting procedure above to attach the pipe thread portion or fl ange mounting portion as applicable.
2. Tighten the packing nut until the internal packing is tight enough so that the friction fi t on the shaft is adequate to prevent leakage but
not prevent the shaft from sliding. Position the etched fl ow arrow parallel with the fl ow (±1° of level) and position the fl ow arrow so it is
pointing in the direction of the fl ow.
3. Proceed to insert the probe into the process media line. Use the adjusting nuts on the all-thread to pull the sensing element into proper
predetermined depth position.
4. Tighten the opposing lock nuts on the all-threads. Tighten the packing nut another half to full turn until tight (approximately 65 to 85
ft-lbs [88 to 115 N-m] torque).
5. Rotate the split ring locking collar to line up with the connecting strap welded to the packing nut. Tighten the two 1/4-28 hex socket cap
screws on the split ring locking collar.
Reverse these steps for removal.
In-line NPT Assembly (FLT 93 -L)
The body length of the in-line assembly should be verifi ed to be sure the assembly will fi t into the process line. The direction of fl ow is im-
portant for proper operation. There is a fl ow direction arrow on the in-line pipe that is to point in the direction of fl ow. See Figure 2-3 for the
correct orientation.
If the instrument is a butt weld assembly, be sure to do the following: Remove the circuit board, properly ground the fl ow element before
welding, GTAW is highly recommended.
Figure 2-3 FLT93-L In-Line Flow Element