ST51 MASS FLOW FLUID COMPONENTS INTERNATIONAL LLC
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3 Doc. No. 06EN003389 Rev. -
Installing Flow Element
Insertion Depth
The ST51 is available with both Teflon compression fitting ferrules and metal ferrules. While the Teflon ferrule configuration can be
readjusted, it is possible that over tightening may result in permanent positioning or damage to the extension pipe and will make
future adjustment difficult. While Teflon provides for some adjustability, it has a lower process pressure rating and is not designed
for continuous adjustments. The metal ferrule version can only be tightened down once and it becomes permanently positioned. The
Ferrule type is indicated in the instrument part number displayed on the instrument tag. This can be cross referenced to the ordering
information sheet.
All flow meters have been calibrated with the flow element located at the centerline of the pipe and flow stream as indicated in Figure
D. Couplings and threadolets come in various dimensions. Proper installation requires that the element be measured with consider-
ation to process connection dimensions and pipe centerline. FCI recommends that the element be first installed in the line with the
compression fitting lightly tightened around the extension, then slowly move the pipe extension forward until the element is at
centerline as shown.
Warning: The element is shipped with a protective sleeve surrounding the flow element. After removing the sleeve,
take care to prevent the element from sliding through the compression fitting and contacting the opposing wall with any
force as it may cause damage to the element and potentially upset the calibration.
FLOW ELEMENT INSTALLATION & “U” LENGTH ADJUSTMENT
Figure D
Note: For proper performance, element shall be installed so that tip of probe is .25 inches [ 6mm] past pipe centerline. Instrument is
specifically calibrated for centerline referenced installation. Critical for line sizes 4" [ 25mm] and smaller.
Warning: On top mount installations, particularly, take care to prevent the element from sliding through the compres-
sion fitting and contacting the opposing wall with any force as it may cause damage to the element and potentially upset
the calibration.
0.000 SFPS
32.2 DEGREES F
FLUID COMPONENTS
INTERNATIONAL LLC
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