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3 Doc. No. 06EN003367 Rev. E
ST50 Mass Flow Meter Fluid Components International LLC
Installing Flow Element
Compression Fitting Mounting
The ST50 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.
Caution: 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 install the element so that probe tip is .50 inches [13 mm] past pipe centerline. The instru-
ment is specifically calibrated for centerline referenced installation, which is critical for line sizes 4" [25 mm] and smaller.
Caution: On top mount installations, particularly, 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.
4.5
[114]
4.00
[102]
U LENGTH
VARIABLE
L
C
.50
[13]
Ø.56
[Ø14]
FLUID COMPONENTS
y
SCFM
INTERNATIONAL LLC
3.28
[83]
3.56
[90]
XXXX
C01443-1-1
2X 1/2"
NPT
1/2" OR 3/4" NPT
PROCESS CONNECTION
MOUNTING ORIENTATION OF FLATS
TO BE PARALLEL TO FLOW
ADJUSTABLE COMPRESSION FITTING,
OPTIONAL TEFLON OR METAL FERRULE
REDUCER
BUSHING
SERIAL NUMBER
FPC HEAD
SHOWN
FLOW ARROW
ENCLOSURE MEETS EXPLOSION PROOF
WATER AND DUST TIGHT APPROVALS
(SEE MANUAL FOR SPECIFIC
APPROVAL TYPES)
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