Yoshitake CF-90 User manual

■EPDT-337a■
MODEL CF-90
Constant Flow Valve
PRODUCT MANUAL .
Thank you very much for choosing the Yoshitake’s product. To ensure the correct and safe use of the product,
please read this manual before use. This manual shall be kept with care for future references.
The symbols used in this manual have the following meanings.
Warning
This symbol indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
Caution
This symbol indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury or may result in only property damage.
Table of Contents
1. Specifications····························································1
2. Structure, Dimensions and Weight·································2
3. Performance characteristic chart
3.1 Noise characteristic chart·······································3
3.2 Flow rate characteristic chart ··································3
4. Precautions for installation···········································4
5. Precautions for operation·············································5
6. Maintenance
6.1 Troubleshooting···················································6
6.2 Precautions for maintenance and inspection ··············6
Warranty Information

‐2‐■EPDT－337a■
1. Specifications
Model
CF-90
Nominal size
15～25A
Application
Cold and hot water
Max. pressure
1.0 MPa
Working differential pressure range
0.2～0.7MPa
Application temperature
5～90℃
Set flow rate
1L/min～40L/min
Tolerance of set flow rate
(15A、25A) Within ±20% of set flow rate
(20A) Within ±3L/min of set flow rate
Connection
JIS Rc screwed
Installation posture
Horizontal or vertical installation
●The product conforms to the standard of the Japanese Water Supply Act.
●NPb-treated
Caution
Please confirm that the indications on the product correspond with the
specifications of the ordered model before use.
* If they are different, do not use the product and contact us.
Nominal
size
Set flow rate list
15A
1L/min
2L/min
3L/min
4L/min
5L/min
6L/min
7L/min
20A
8L/min
10L/min
12L/min
14L/min
25A
20L/min
25L/min
30L/min
35L/min
40L/min

‐3‐■EPDT－337a■
2. Structure, Dimensions and Weight
Fig.2 Structure, Dimensions and Weight
No.
Parts name
1
Body
2
C type retaining rings
(internal)
3
Cartridge
4
Label
5
JWWA label
*6
Spacer
*7
Needle
*8
Needle plate
Parts No.6 is only for 20A.
Parts No.7 and 8 is only for 25A.
(mm)
Nominal
size
d
L
A
Weight
(kg)
15A
Rc 1/2
46.5
26
0.2
20A
Rc 3/4
60
32
0.3
25A
Rc 1
70
41
0.5
Internal structure of B (20A)
Internal structure of B (25A)

‐4‐■EPDT－337a■
3. Performance characteristic chart
3.1 Noise characteristic chart
Fig.3.1 Noise characteristic chart
3.2 Flow rate characteristic chart
Fig.3.2 Flow rate characteristic chart
Noise
Differential pressure
Differential pressure
Flow rate
(The chart shows the noise level at the max. flow rate of each nominal size.)
Working differential
pressure range
Set flow rate
(+20~-20%)

‐5‐■EPDT－337a■
4. Precautions for installation
Caution
(1) Before installing the product, remove foreign substances and scale from the piping,
and note that seal materials must not flow into the inside of the product or piping.
Commingling of foreign substances such as scale or seal material leads to
malfunction of the product.
(2) The product can be installed either horizontally or vertically.
To install the product, check the direction on the label of the product so that the
fluid flowing and the mark on the product are in the same direction.
*Wrong direction leads to malfunction of the product.
(3) Install pipes so that excessive load, torque or vibration is not applied to the
product.
(4) If component having negative effect on inner parts is included in fluid and
environment, deterioration of rubber parts is accelerated and causes outside
leakage and functional disorder.
(5) Impact by rapid pressure change, such as water hammer, breaks the product or
parts.
(6) If fluid cannot flow due to closed piping situation of the product, fluid temperature
rise expands volume of fluid in the piping and damages the product.
(7) Secure enough space needed for maintenance and inspection of the product.
(8) Do not make dissimilar metal piping which causes difference of electrical potential.
If doing so, the product and parts are corroded.
(9) Consider usage condition (usage frequency or durability) when selection.
(10) Install a strainer (mesh size of 60 or 80) at the inlet side of the product.
* Commingling of foreign substances such as scale material leads to prevent the
product from functioning properly.
(11) The majority of product failures are happened due to scales such as sands and
dust in the pipeline. Please pay attention to the dust inside the pipeline.
(12) Be sure to install bypass piping.
*The noise level is greatly affected by the condition of the piping system and indoor
environment. To balance the total flow rate, use a bypass pipe to reduce the flow
velocity or make other adjustments.
(13) The products cannot be used with pipe end core.
Fig.4 Piping example
Stop valve
Stop valve
Stop valve
Bypass
CF-90
Constant Flow Valve
Strainer
Stop valve

‐6‐■EPDT－337a■
5. Precautions for operation
Warning
(1) Before leading fluid, make sure that there is no danger when the fluid flows to the
end of piping.
* If tightening is not secured, hot fluid may spout out and result in burns.
* Fluid outflow may cause property damage.
(2) Close the stop valves before and after the valve, and remove all foreign matter and
scales via the by-pass line before operation.
* Commingling of foreign substances such as scale material leads to prevent the
product from functioning properly.
(3) If case of a possible frozen line, take proper measures to remove water inside the
piping or equip the product with insulating materials.
(4) Do not touch the product with bare hands when the product is used for hot fluid.
* Failure to follow this notice may result in burns.
Caution
(1) Completely discharge the fluid inside of the product and line before leaving the product not
operated for a long time.
* Failure to follow this notice may cause malfunction of the product due to rust inside of the
product and lines.

‐7‐■EPDT－337a■
6. Maintenance
6.1. Troubleshooting
* Please contact us for the troubles other than above.
6.2. Precautions for maintenance and inspection
Warning
(1) Do not disassemble the product.
* It will cause product malfunction.
(2) Ask professional or experienced company to do the inspection.
(3) Completely discharge the pressure insideof the product, line and equipment before
maintenance. In the case of high-temperature fluid, cool down the product till it can
be touched with bare hands.
* Failure to follow this notice may result in injury or burns.
Trouble
Cause
Remedy
No flow
or
Poor flow
The cartridge is clogged.
Clean the cartridge.
The cartridge is broken.
Replace the product.
The set flow rate is wrong.
Confirm the flow rate with the
indications on the product.
Stop valves before and after the
product are not completely opened.
Open completely the stop
valves.
It is frozen.
Check the piping.
The differential pressure is out of
the specified range.
Review usage conditions.
Flow rate more
than specified
The cartridge is broken.
The rubber part of the cartridge is
hardened.
Replace the product.
The set flow rate is wrong.
Confirm the flow rate with the
indications on the product.
The differential pressure is out of
the specified range.
Review usage conditions.
Steam leakage
Parts or body is damaged or
deformed.
Replace the product.
Installation on piping is loose.
Please retighten.

2015.8
PDD-046e
Warranty Information
1. Limited warranty
This product has been manufactured using highly-advanced techniques and subjected to
strict quality control. Please be sure to use the product in accordance with instructions on
the manual and the label attached to it.
Yoshitake warrants the product to be free from any defects in material and workmanship
under normal usage for a period of one year from the date of receipt by the original user, but
no longer than 24 months from the date of shipment from Yoshitake’s factory.
2. Parts supply after product discontinuation
This product may be subject to discontinuation or change for improvement without any prior
notice. After the discontinuation of the product, Yoshitake supplies the repair parts for 5
years otherwise individually agreed.
3. This warranty does not cover the damage due to any of below:
(1) Valve seat leakage or malfunction caused by foreign substances inside piping.
(2) Improper handling or misuse.
(3) Improper supply conditions such as abnormal water pressure/quality.
(4) Water scale or freezing.
(5) Trouble with power/air supply.
(6) Any alteration made by other than Yoshitake.
(7) Use under severe conditions deviating from the design specifications
( e.g. in case of corrosion due to outdoor use).
(8) Fire, flood, earthquake, thunder and other natural disasters.
(9) Consumable parts such as O-ring, gasket, diaphragm and etc.
Yoshitake is not liable for any damage or loss caused by malfunction or defect of the product.
INTERNATIONAL DEPT.
955-5, Miyamae, Irukadeshinden, Komaki, Aichi, 485-0084, Japan
Phone: [phone] Fax: [phone]
E-mail: [e-mail]