Fluid Components International ST75_ST75V - Manual

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ST75/ST75V MASS FLOW METER
Installation and Operation Guide
Pre-Installation
Serial number Alignment
The ST75 and ST75V (Vortab) can be specified with integral or remote electronics. The flow element has a serial number etched into
the side of the HEX as shown on figure A. In addition, the tag on the enclosure will also denote serial number and model number. The
associated transmitter circuit card has a serial number noted on the board as shown in figure B. The flow sensor and transmitter
circuit have been calibrated as a matched set and should be paired together in service unless otherwise approved by a factory techni-
cian.
Flow Direction Alignment
All sensor elements have a flow arrow indicator marked on the element assembly at the reference HEX flat. These flow elements have
been calibrated in a particular direction and are designed to be used in service with the flow arrow going in the same direction as flow
in the pipe stream. The flow element has been calibrated directly in the pipe tee or tube tee with careful consideration for orientation
and insertion depth. Removal from the tee section while physically possible is not recommended unless authorized by a factory
technician.
Recommended Straight Run
To optimize flow meter system performance, FCI recommends installation with a minimum of 20 diameters upstream straight run and
10 pipe diameters of downstream straight run. Where straight run limitations significantly reduce the available pipe diameters, FCI
utilizes flow conditioners to produce a transferable flow profile from the calibration installation to actual field installations. FCI’s
proprietary AVAL software is available to make flow meter installation evaluations where straight run limitations are considered. See
Figure C for recommended installation.
Figure A Figure B
Flow Direction
Serial Number
FLOW
0.000 SFPS
32.2 DEGREES F
FLUID COMPONENTS
INTERNATIONAL LLC
Figure C - Recommended Straight Run Condition