or moreVibration or moreVibration/
impact
20
m/s
2
98
m/s
2
A
External view of strainer
B
C
D
12
Water-use equipment
Safety Precautions
Always read this section before use.
CE-compliant working conditions
This product is CE-marked, indicating conformity
with the EMC Directives. The standard for the
immunity for industrial environments applied to this
product is EN61000-6-2; the following requirements
must be satised in order to conform to this standard:
Conditions
The assessment of this product is performed by using a
cable pairing a power supply line and a signal line,
treating this cable as a signal line.
This product is not equipped with surge protection.
Implement surge protection measures on the system side.
DANGER
1. Working uids
Design/selection
Do not use in drinking water.
As it does not conform to the requirements of the
Food Sanitation Act, do not use this product for
applications that measure water entering the human
body. Intended applications include industrial sensors.
Do not use this product for ammable uids.
This product cannot be used as a business meter.
This product does not comply with Measurement
Laws, and cannot be used for commercial business. It
cannot be calibrated, so use it as an industrial sensor.
Applicable uid is water (industrial water, pure
water); do not use with any other uid.
Explosion-proof environment
Never use this product in an explosive gas
atmosphere. The structure is not explosion-proof,
and explosions or res could occur.
Corrosive environment
Do not use this product in an atmosphere containing
corrosive gases such as sulfur dioxide.
Fluid temperature and ambient temperature
Use in a uid temperature range of 1 to 95°C, and
an ambient temperature range of 0 to 50°C. If the
uid temperature rises to 95°C or higher, cool it
down using a cooling system such as a chiller. As
well, if there is a risk of freezing, drain the product
or keep it warm to prevent freezing.
When the uid and ambient temperatures are high,
the product may also get hot. There is a risk of
burns if it is touched directly.
Even if the ambient temperature is within the
specied range, do not use this product in a location
where rapid changes in temperature can occur.
Max. working pressure
Do not use at a pressure exceeding the max.
working pressure, as excessive pressure can
cause product failure. To prevent the pressure from
reaching the max. working pressure, particularly
due to water hammer, take the following measures:
(1)
Using a water hammer reduction valve or other similar
mechanism, reduce the valve closing speed.
(2) Using elastic piping material, e.g. rubber hose, and an
accumulator, absorb the impact pressure.
(3) Make the pipe length as short as possible.
Drip-proof environment
This product employs a dust-proof, drip-proof
structure that provides reliability during maintenance
and cleaning, during which it may be exposed to
water splashing. However, avoid using this product
in a location where it may be constantly exposed to
water or intense splattering of water and/or oil.
WARNING
DANGER
2. Working environment
WARNING
If there is a risk of foreign matter entering the uid,
install a lter (strainer) on the primary side. If foreign
matter adheres to the vortex generator or vortex
detector, measurement accuracy can be compromised.
When using after adjusting to a small ow rate with the
manual valve, the valve's opening (clearance) becomes
very small. If there are large foreign bodies in the uid, they
may clog the clearance and reduce the ow rate.
Strainer specications
Descriptions Usage
Specication uid Water
Pressure resistance MPa 2
Working pressure range MPa 0 to 1
Operating ambient temperature range
°C 1 to 90
Main material Usage
Body Copper alloy casting
Strainer Stainless steel
CAUTION
Model No. A B C D
WF-FL-280730 70 44 23 Rc3/8
WF-FL-280731 80 49 28 Rc1/2
WF-FL-280732 100 57 35 Rc3/4
WF-FL-280733 115 72 43 Rc1
WF-FL-280734 135 82 52 Rc1 1/4
WF-FL-280735 160 98 59 Rc1 1/2
Vibration/impact
Do not use this product in an environment exposed
to vibrations of 20 m/s
2
and over and shocks of
98 m/s
2
and over. This may cause malfunction and/
or damage, as this product uses the Karman's
vortex type detection principle.
Water temperatureWater temperature
Below 1°C
Higher than
95°C
Keep
warm
Cool with
chiller
(Sealant tape, etc.)
Strainer
Vortex generator
Foreign matter
Vortex detector
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