Yoshitake CF-90 Manuale utente

■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

Body

C type retaining rings

(internal)

Cartridge

Label

JWWA label

Spacer

Needle

Needle plate

Parts No.6 is only for 20A.

Parts No.7 and 8 is only for 25A.

(mm)

Nominal

size

Weight

(kg)

15A

Rc 1/2

46.5

0.2

20A

Rc 3/4

0.3

25A

Rc 1

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

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

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

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: +81-568-75-4432 Fax: +81-568-75-4763

E-mail: Intntl@yoshitake.co.jp

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