Reference Manual
00809-0100-4731, Rev FA
April 2003
APEX
™
and APEX Sentry
™
Radar Gauge
2-18
Figure 2-14. Diagram for
Installation with a Process
Window
5. Center the second spiral-wound gasket (4) on top of the standoff
pipe/spool piece.
6. Attach the radar gauge(1) to the standoff pipe or spool piece using the
bolts and nuts as shown. Tighten the bolts to
75-100 ft-lbs (102-136 N-m).
NOTE
Intermittent purge lines are acceptable. Either purging onto the antenna to
flush away material or onto the window for periodic cleaning. See Figure 5-1
on page 5-3 for more detailed information.
NOTE
When a process window is used, the window and spool piece heights will
need to be incorporated into the Reference Gauge Height and Upper Null
Zone. Refer to the definitions on page 3-8 for more information.
Cross-Section of
Installed Process Window
1. APEX Radar
Gauge
4. Spiral-wound
Gasket (non-wetted)
9. Mounting Bolts/Nuts
3. Process
Flange
2. Standoff Pipe or Spool
Piece (non-wetted)
4. Spiral-wound
Gasket (non-wetted)
6. Teflon Window
5. SST Window Ring
8. EMI O-Ring
7. Process O-Ring
Process
O-Ring
Spiral-wound
Gasket
Teflon
Window
EMI
O-Ring
SST
Window Ring
3700_2005A01A
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