Omega Products FL-W01 Installation Manual
®
FL-W Series
Water Meter Monitors
INSTRUCTION
SHEET
M-0373/1206
INTRODUCTION
OMEGA ’s FL-W Series of Water Flow Monitors are rugged, vanable-area flowmeters that can be used with
flows from 1 gpm to 90 gpm. These flowmeters utilize
the fluid movement to actuate either a swinging vane
or piston, which drives the scale pointer and triggers
the signal switch. Models FL-W01, FLW02, FL-W05,
FL-W10, FL-W15 and FL-W20 use the piston design.
Models FL-W30, FL-W40, FL-W50, FL-W60, FL-W70,
FL-W80 and FL-W90 use the swinging vane design.
SPECIFICATIONS
ACCURACY: _+ 5% full scale / piston models;
± 2% full scale / vane models
REPEATABILITY: + 1% of reading
TEMPERATURE RA TING: 200 ˚F max.
PRESSURE RATING: 150 psig max. (piston models);
300 psig max. (vane models)
PRESSURE DROP: 2-5 psi (piston models);
2.2 - 3.8 psi (vane models)
SIGNALSWITCH: 3-wire SPDT, 15 A @ 125 V AC,CSA/CE rated
INTERNAL WETTED PARTS: 300 Series SS
SEALS: Buna and T eflon (piston models); Buna (vane models)
Model Flow Rate Readout Port Design
Number GPM Increments Size Type
FL-W01 0-1 0.2 3/4" PISTON
FL-W02 0-2 0.25 3/4" PISTON
FL-W05 0-5 1.0 3/4" PISTON
FL-W10 0-10 2.0 3/4" PISTON
FL-W15 0-15 3.0 3/4" PISTON
FL-W20 0-20 4.0 3/4" PISTON
FL-W30 0-30 5.0 1 1/2" VANE
FL-W40 0-40 5.0 1 1/2" VANE
FL-W50 0-50 10.0 1 1/2" VANE
FL-W60 0-60 10.0 1 1/2" VANE
FL-W70 0-70 10.0 2" VANE
FL-W80 0-80 10.0 2" VANE
FL-W90 0-90 10.0 2" VANE
INSTRUCTIONS FOR MODELS FL-W30,
FL-W40, FL-W50, FL-W60, FL-W70, FLW80 and FL-W90
THEORY OF OPERATION
The FLW flow monitor utilizes the kinetic energy of a
flowing liquid to move a spring-biased swinging vane.
This action varies the orifice size in proportion to the
flow rate. The vane is mechanically linked to a pointer
which indicates the rate of flow on a scale. This mechanical output can also be used to trip electric
switches.
NPT
12
16
20
OPERATION DIAGRAM
INSTALLATION
This is an in-line device. To install, thread your piping
into the NPT ports, with flow going into the port
marked “IN”. Mounting can be in any position. See
dimension diagram.
4-1/2
4-1/2
RECOMMENDED INSTALLATION PRACTICES
Water hammer and surges can be damaging to
any flowmeter and must
Water hammer occurs when a liquid flow is suddenly stopped as with quick closing and solenoid
operated valves. Surges occur when flow is suddenly begun, as when a pump is turned on at full
power or a valve is quickly opened. Liquid surges
are particularly damaging to flowmeters if the pipe
is originally empty . To avoid damaging surges, fluid
lines should remain full (if possible) and pumps
should be brought up to power slowly and valves
opened slowly . In addition, to avoid both water hammer and surges, a surge chamber should be installed.
1
5-5/8
SWING
RADIUS
5
9
DIMENSION DIAGRAM
always
5-1/2
be avoided.
8
4
0
CHANGING THE SPRING (VANE STYLE)
Remove the spring cover and the main spring. Place
the new main spring onto the shaft and attach it by
sliding the hole in the inside loop of the coil over the flat
head rivet, and then place the outside loop over the roll
pin with only 1/4 turn of the spring counter clockwise.
SOCKET HEAD CAP SCREWS
PERIODIC MAINTENANCE
Using a valve to vary the flow, observe the pointer
tracking the flow rate. If the flow monitor does not
respond properly, it is probably due to foreign material building up around the swinging vane and hanging it up. The vane can sometimes be jogged loose
by manipulating the pointer. If lt doesn’t free up, remove the bowl and clean out the flow chamber around
the swinging vane with a knife or brush.
For replacement parts, contact OMEGA Engineering
Customer Service Department.
SPRING COVER
MAIN SPRING
MEDIUM SPRING PLATE
MEDIUM HOUSING
SWINGING VANE
BOWL
GASKET
ROLL PIN
CONTROL BOX
SHAFT
3 WIRE SPDT SWITCH
PARTS DIAGRAM FOR VANE MODELS
SHAFT
INDICATOR DIAL
SCALE
HEX NUTS
INDICATOR DIAL
SPRING
O RING
CAM RETAINER
SCREW
CAM RING
ALLEN SCREWS
POINTER SCREW
POINTER
2
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