ONICON F-1100 Series - Manual (Page 8)

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Turbine Flow Meter Manual 05/14 - 0721-3 / 13518
Page 8
SECTION 3.0: INSTALLATION, REMOVAL & ADJUSTMENT
WARNING
Insertion flow meters may often be installed in pipes which are under high pressure. Accidents
with these systems can cause serious injury or death. Only persons experienced with high pressure
systems and related knowledge in the heating, cooling and fluid metering fields should attempt to
install adjust or remove the flow meter. Carefully read the installation and removal instructions in
this manual before performing any work on these meters.
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ONICON will be happy to assist with technical recommendations and to provide guidance by
telephone or e-mail. On-site field engineering, installation and service is also available at additional
cost.
3.1 INSTALLATION SITE SELECTION
Install the flow meter where it will be accessible for personnel to perform necessary periodic
maintenance. The clearance required for insertion meter installations is typically 23”-36”
from the pipe wall to the nearest obstruction above the valve assembly. This clearance
dimension will increase with large diameter pipes. Allow at least 6” of clearance for inline
meter installations. The environment should be free of corrosive liquids/fumes, temperature
extremes and heavy vibration. The following information should be used as a guide to the
proper location for installing the meter.
GENERAL PRACTICES:
1. For best results, install the flow meter in a straight run of pipe, free of bends,
tees, valves, transitions, and obstructions.
2. Straight run requirements vary based on the nature of the upstream obstruction.
Review the following pages for guidelines in determining minimum
upstream straight run requirements based on the nature of the obstruction.
Note: Depending upon specific location details, more or less straight run may be
required to produce a satisfactory flow profile.
3. If there is insufficient straight run, allow 80% of the run upstream and 20% of the
run downstream. If the total length of straight run is less than 70% of the
recommended length, performance may seriously degrade, and consideration
should be given to changing to the series F-3000 In-line Electromagnetic Flow
Meter.
How To Determine The Available Straight Pipe Diameters:
For each application, locate the longest straight, unobstructed section of pipe (no bends, tees, valves,
other insertion probes, size transitions). The longest straight pipe run in inches divided by nominal
pipe size in inches equals “diameters of straight pipe.” For closed loop applications, consider both
the supply and return lines as possible locations.
IMPORTANT NOTE
Always use the maximum available straight run. When more than the minimum required
straight run is available, place the meter such that the excess straight run is upstream of the
meter location.
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