Installation | Flow Switches
Bulletin 8590 Page 9
INSTALLATION
The sensing ports of the flow sensor must be correctly positioned for measurement accuracy. The side connection or high pressure should be pointed upstream. The top connection is for static or low pressure. The sensor should be installed in the flowing line with a rule of thumb of 10 - 15 pipe diameters upstream and 5 downstream. The table below lists recommended up and down stream piping requirements.
When installing, drill through the center of the thred-o-let into the pipe with a drill that is slightly larger than the flow sensor diameter. Insert sensor until it bottoms out, then withdraw 1/16" to allow for thermal expansion.
Upstream and Downstream Dimensions in terms of Diameter of pipe
Upstream Condition
Downstream
Upstream (In-Plane) Upstream (Out of Plane)
One elbow or tee
7
9
5 5 5 5 5
Two 90° bends in same plane Two 90° bends in different plane
8
12
18
24
Reducer or expanders
8
8
Any valves
24
24
1/4 NPT (male)
5/16"
Flow
1/16 (1.59) Clearance
WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
CONTACT fna.sales@fivesgroup.com T +1 800 626 3477 - F +1 216 373 4237
Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA www.fivesgroup.com
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