Fluid Components International FLT Series - Manual (Page 13)

Doc. No. 06EN003246 Rev. B 2 - 3 FLTÔ Series FlexSwitchÔ
CHAPTER 2 - INSTALLATION FLUID COMPONENTS, INTL
Flange Mounting
For flange mounted sensing elements, attach the process mating flange with care. The correct orientation of the
sensing element must be maintained to ensure optimum performance or calibration. See Figure 2-2 and the
appropriate drawings in Appendix A.
Packing Gland Assembly
Applications involving the use of a packing gland (low or medium pressure) should refer to the drawings in
Appendix A for additional detail.
1. Threaded or flanged packing gland mounts are available. The valve assembly with appropriate connections are
customer supplied. Follow the male NPT mounting procedure above to attach the pipe thread portion or flange
mounting portion as applicable.
2. Tighten the packing nut until the internal packing is tight enough so that the friction fit on the shaft is adequate
to prevent leakage but not prevent the shaft from sliding. Position the etched flow arrow parallel with the flow
(±1° of level) and position the flow arrow so it is pointing in the direction of the flow.
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 verified to be sure the assembly will fit into the process line. See
the appropriate figure in Appendix A to determine the assemblies length. The direction of flow is important for
proper operation. There is a flow direction arrow on the in-line pipe that is to point in the direction of flow. See
Figure 2-3 for the correct orientation.
Figure 2-2. Flange Mount