DESCRIPTION
The FL-1200 Flowmeters are variable area, glass tube,
flowrate indicating meters. The basic elements are a tapered
glass metering tube and a metering float. Features include
quick and simple removal or installation of the tube and float
while the meter remains in the process piping.
RECEIPT OF EQUIPMENT
When the equipment is received, the outside packing case
should be checked for any damage incurred during shipment.
If the packing case is damaged, the local carrier should be
notified at once regarding his liability.
UNPACKING
Carefully unpack the meter and inspect it for any damage
that may have occurred during shipment. The flowmeters are
shipped completely assembled and tested. It should not be
necessary to tighten or adjust any of the parts when it is
received.
RETURN SHIPMENT
Do not return any assembly without an authorized return
(AR) number from OMEGA Customer Service Department
(203) 359-1660.
INSTALLATION
The flowmeter should be mounted within 6° of the true
vertical. The inlet connection to the flowmeter is in the bottom
end fitting. The connections are normally horizontal, female
NPT. Be sure that the piping is adequately supported to
prevent undue strain on the meter. Both end fittings of the
flowmeter may be rotated in 90° increments. To rotate the end
fittings simply remove the side plates and tube and rotate the
end fitting to the desired location. When the meter is
reassembled, the side plates and endfittings are self-aligning.
OPERATION
CAUTION
Do not operate this instrument in excess of specifications.
After the flowmeter has been installed in the flow system, it is
ready for operation. A built-in needle control valve may be
provided to control the flow through flowmeter. These control
valves are designed for fine control. Excessive tightening may
damage the valve seat and limit its effectiveness as a control
valve. If tight shut-off is required, it is recommended that a
separate shut-off valve be installed in the line immediately
before the flowmeter.
DISASSEMBLY AND CLEANING
It is recommended the user periodically inspect the tube and
float, and clean if necessary. Dirt or foreign materials
adhering to the tube and float may cause inaccuracy and
sticking of the float. The metering tube (Borosilicate glass)
and related parts may be ultrasonically cleaned or cleaned
with any solvent which does not attack glass. To disassemble,
use the following procedures:
1. Remove the plastic safety shield.
2. Loosen the seal spindle or jack screw by turning it
counterclockwise with a 5/32" hex wrench. The tube may
now be canted out of the meter housing.
3. When cleaning Series FL-1200 meters, it is recommended
the spring float stops and float be removed to prevent the
stops and float from accidently failing out of the tube
during handling, and possibly causing damage to the float.
4. Packing seats and packing inserts now may be removed.
5. With the metering tube out, the seal spindle or jack screw
may be rotated clockwise for removal. it should not be
necessary to remove the seal spindle unless the “O” Ring
which seals the spindle requires replacement. The“O” Ring
may be used as long as it is not torn or distorted.
6. The needle control valve assembly may be removed by
turning the valve body counter-clockwise, The valve seat,
stem and packing then may be removed easily from the
valve body f or cleaning or replacement.
SPECIFICATIONS
SCALES
LENGTH:
65 mm
GRADUATIONS:
Direct reading in gpm water or
scfm air
RATINGS
PRESSURE:
200 PSIG maximum
TEMPERATURE:
250°F maximum. Fluid temperatures
below 32°F will cause
frosting of the glass metering tube.
CONNECTIONS:
Horizontal female, 3/8" NPT
ACCURACY:
Conforms to ISA R. P. 16.1,
Specifications 10-S-10 ±10% full scale
REPEATABILITY:
±0.5% of full scale
DIMENSIONS:
H: 8.44" x W: 1. 5" x D: 4.56"
CONSTRUCTION
METERING TUBE:
Borosilicate Glass
FLOAT:
316 Stainless Steel
FLOAT STOPS:
Stainless Steel
END FITTINGS &
TUBE RETAINING
ADAPTOR:
Chrome plated brass, 316 stainless
steel
SIDE PLATES:
Chrome plated brass
PACKING MATERIAL: O-Rings: Buna-N w/Brass, Viton
®
w/Stn Stl:
Packing: Neoprene
®
w/Brass, Viton
w/Stn StI.
FL-1200 Series
High Flow Rate Purge Rotometers
INSTRUCTION
SHEET
M0362/1200
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