Yoshitake SY-5 User manual

■EPDT-042b■
TYPE SＹ－５
STRAINER
Installation & Operation Manual
We thank you very much for using the Yoshitake Products. In order to put in
use our product correctly and safely, please make sure to read this manual
thoroughly prior to the installation. Also we kindly request you to keep this
manual with care at your hand.
The following safety symbols are used in this manual.
Warning
Indicates that mishandling this product might cause fatal or
serious bodily injury.
Caution
Indicates that mishandling this product might cause bodily
injury or material damage.
Table of Contents
1. Overview ············································································1
2. Specifications······································································1
3. Dimensions and Weights ····················································1
4. Operation·············································································2
5. Pressure loss
5.1. Stainer of diameter························································3
5.2. Selection of pipe diameter············································3
5.3. Pressure loss diagram ···················································4
6. Maintenance procedure
6.1. Precautions during installation ·····································5
6.2. Warning and Caution at the point of use·····················5
7. Disassembly, cleaning and assembly
7.1. Precautions during disassembly and inspection ·········6
7.2. Caution during assembly ···········································6

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■EPDT-042b■
General description
Strainer is used as dust exhaustion for various pipe lines. Strainer is necessary
especially in front of pressure reducing valve, temperature regulator, steam trap, and
various valves as the reason for maintenance and conservation.
１．Features
(1) The most economical superior type due to compactness and lightweight.
(2) The strainer is marine type to have maximum filtration area with due consideration
of lowering flow rate caused by clogging.
２．Ｓｐｅｃｉｆｉｃａｔｉｏｎｓ
Ａｐｐｌｉｃａｔｉｏｎ
Steam・Ａｉｒ・Cold and hot wａｔｅｒ・Oil・Other non-dangerous fluids
Max.Press.
2.0MPa
Max.Temp.
220℃
Material
Body
Ductile Cast Iron
Screen
Stainless Steel
Connection
JIS Rc
※Standard Screen：OutSide Screenφ2.5－7.21Holes/cm2 InSide Screen80Mesh
・20～100Mesh Screen are also available
・Plug made of bronze or brass is also available an order. And, size 10 to 32A
plug is also available.

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■EPDT-042b■
３．Dimensions and Weights
（mm）
Size
ｄ
Ｌ
Ｈ1
ｄs
ls
Plug Size
Weight(kg)
10A
Rc 3/8
65
50
18
32
(Rc 1/4)
0.4
15A
Rc 1/2
75
55
20
35
(Rc 1/4)
0.6
20A
Rc 3/4
90
70
25
50
(Rc 3/8)
0.9
25A
Rc 1
110
85
32
60
(Rc 3/8)
1.4
32A
Rc 1 1/4
135
95
40
70
(Rc 3/8)
2.2
40A
Rc 1 1/2
145
105
45
75
Rc 3/8
3.4
50A
Rc 2
170
120
56
90
Rc 3/8
4.5
The plug size ( ) is for the case with a plug.
４．Operation
No.
Name of Parts
１
Body
２
Cap
３
Screen
４
Gasket
５
Plug
The screen③removes dust, scale and other foreign matter out of the fluid flown from
inlet port of strainer.
40～50A
10～32A
40～50A
10～32A

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■EPDT-042b■
5.Pressure loss
To use the strainer most effectively and to fulfill the required criteria thoroughly,
please take the following points into consideration.
5.1 Selection of strainer diameter
The same one as the piping size is selected(piping size＝strainer size) if a small size is
used,pressure drop glows and pressure prescribed at the entrance of the equipment
might not be able to be maintained.
5.2 Selection of pipe diameter
When selecting the nominal diameter of pipe, it is necessary to consider the kind of
fluid, its maximum flow rate, allowable pressure loss and piping installation cost among
others. Smaller diameter of pipe makes the lower piping cost, but the pressure loss will
be increased and there are possibilities of abrasion of pipe, noise and vibration due to
turbulent flow. If the pipe diameter is too large, not only the piping cost but also the
heat loss will be increased.
As one method of selection of suitable pipe diameter, Japan Industrial Standard (JIS)
sets the standard flow velocity depends on the relative kind of fluid, its characteristic
and pipe diameter, to which please refer.
≪Standard flow velocity of fluid≫
Fluid
Standard flow velocity
Water ,Oil
2 m/s(2～4)
Steam
30 m/s(20～40)
※This list shows the standard flow velocity of relative fluid, which made in
reference with the standard of JIS F7101(Ship’s Machinery Standard Flow
Velocity in Pipes).

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■EPDT-042b■
５．３ Pressure loss diagram
Screen：Outside Screenφ１.２－２３.８Holes/cm2
Screen：Outside Screenφ２.５－７.２１Holes/cm2Inside Screen ８０Mesh
Fluid：Water
Size
△Ｐ:Loss of Pressure
(MPa)
V Flow Rate(L/min)

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■EPDT-042b■
６．Maintenance procedure
６．１ Precautions during installation
Caution
（１）When installing, confirm if the direction of fluid flow matches with inlet and
outlet port of the product respectively.
※If installed in opposite direction, it will not function as designed.
（２）When installing, reserve the space shown for the maintenance and checking
(cleaning of the screen).
※It will be impossible to carry out the maintenance and inspection (cleaning of the
screen).
（３）When installing, do not transmit unreasonable load, bending, vibration to the
products.
※The leakage problem may occur.
（４）Carry out the connection with pipes properly.
※Improper piping connection may cause the leakage of fluid due to vibration or
other cause. With some kind of fluid, there will be a danger of personnel being
scalded.
The fluid flowed out of pipe end may cause some material damages.
（１）In case installing pressure gauge at backward and forward of strainer, clogging
can be checked by differential pressure. ［Ref. 8．Piping example figure 1］
（２）Install strainer with the cap parts facing downward. ［Ref. 8．Piping example
figure 1］
However, install strainer with cap parts facing sideways in case of steam piping
so that condensate accumulation is minimized. ［Ref. 8．Piping example figure
2］
（３）if fluid flows from bottom to top, install a blow valve in order to remove scale
accumulated at the bottom of riser pipe. ［Ref. 8．Piping example figure 3］
６．２ Warning and Caution at the point of use
Warning
（１）In case the high temperature of fluid is applied, keep the bare hand off the
strainer.
※It may cause the personnel being scalded.
（２）Do not tighten the cap after flowing the fluids to the valve.
※The gasket will be broken and leads to have a leakage.
Caution
（１）Use the strainer in condition of maximum pressure loss of below 0.1MPa. Also
keep cleaning the screen periodically.
※The screen may be damaged.

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■EPDT-042b■
７． Disassembly, cleaning and assembly
(1) Since the screen is heavy in weight, when extracting the screen from the body, make
sure to secure it properly with lifting devices.
※The screen fallen down may cause the injury.
７．１ Precautions during disassembly and inspection
Warning
（１）Completely discharge internal pressure from the valves, lines, and equipment
before disassembly and inspection. And, cool the valve down to a level
where you can touch it with bare hands before disassembly and inspection.
※Failure to do so may result in injury or burns due to residual pressure or
spillage around the valve.
（１）After checking no internal pressure existed in the strainer by pressure gauge and
etc, dismount Cap②, and take out Screen ③which shall be washed by
compressed air or water.
７．２ Caution during assembly
Caution
（１）Clean the Body and gasket contact surface at the Cap.
※Incorrect cleaning may cause the leakage from the gasket and results in burns.
（２）Certainly replace into the new gasket whenever assembly.
※In case using old gasket without change, the fluids may leak to the outside of
the valve.
（１）Clean the gasket contact surface at Body①and Cap②, and mount the new
gasket at Cap②. At the last, assemble cleaned screen③at the groove on the
Cap②and screw to the body①.
８．Example of piping
Figure-1
Figure-2
Figure-3

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]