Yoshitake SY-10 Series User manual

■EPDT-049a■
MODEL SY-10
STRAINER
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. Overview·································································· 1
2. Features ·································································· 1
3. Specifications···························································· 1
4. Dimensions ······························································ 2
5. Operation································································· 2
6. Nominal Size Selection ··············································· 3
6.1 Selection of nominal size········································ 3
6.2 Selection of nominal pipe size ································· 3
6.3 Pressure Loss Chart·············································· 4
7. Maintenance ··························································· 5
7.1 Precaution for installation ······································· 5
7.2 Precaution for operation ········································· 5
8. Disassembly, Cleaning and Reassembly ························ 6
8.1 Precaution for disassembly and inspection ················· 6
8.2 Precaution for reassembly ······································ 6
9. Piping Example ························································· 6
Warranty Information

1 ■EPDT-049a■
1. Overview
The SY-10 series strainers are widely used for removal of foreign substances such as dust, pipe
scale, chips, or slugs from various types of pipelines. Install this product at the inlet side of a
pressure reducing valve, temperature regulating valve, pump, or steam trap. The product has a body
made of cast carbon steel and a screen of stainless steel. Standard mesh size of the screen is 80
mesh.
2.
Features
1. The product is made of cast carbon steel, with connections of JIS 10K/20K/30K RF flanged and ASME
Class 150/300 flanged as standard specifications.
2. The standard product has a stainless steel screen of 80 mesh with perforation.
3. Specifications
Model SY-10-10 SY-10-20 SY-10-30 SY-10-150 SY-10-300
Application Steam, Air, Cold and hot water, Other non-dangerous fluids
Nominal size 15A-250A
Max. pressure 1.0 MPa 2.0 MPa 3.0 MPa 1.0 MPa 2.0 MPa
Max. temperature 260°C
Material
Body Cast carbon steel (SCPH2) Cast carbon steel
(A216 Gr.WCB)
Screen Stainless steel (SUS304)
Screen Perforations
φ6 - 8P
Mesh Standard 80 mesh
Connection JIS 10K RF
flanged
JIS 20K RF
flanged
JIS 30K RF
flanged
ASME Class 150
flanged
ASME Class 300
flanged
•Available with 20 to 100 mesh filter upon request.
•If the temperature is more than 260 °C, please contact us.

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4. Dimensions
SY-10-10, SY-10-150 (mm) SY-10-20, SY-10-30, SY-10-300 (mm)
Nominal
size L H1ds
ls Plug
Nominal
size L H1
ds ls Plug
15A 180 100 24 70 R 1/2 15A 180 100 24 70 R 1/2
20A 180 100 24 70 R 1/2 20A 180 100 24 70 R 1/2
25A 200 113 33 80 R 1/2 25A 200 113 33 80 R 1/2
32A 220 138 46 100 R 1/2 32A 240 140 46 100 R 1/2
40A 220 138 46 100 R 1/2 40A 240 140 46 100 R 1/2
50A 250 165 56 120 R 1/2 50A 275 170 56 120 R 1/2
65A 300 185 73 125 R 1/2 65A 310 188 73 125 R 1/2
80A 320 210 88 145 R 1/2 80A 345 215 88 145 R 1/2
100A 380 270 108 200 R 1/2 100A 395 275 108 200 R 1/2
125A 450 310 138 230 R 3/4 125A 470 325 138 230 R 3/4
150A 500 375 158 280 R 3/4 150A 520 380 158 280 R 3/4
200A 600 470 208 350 R 3/4 200A 655 475 208 350 R 3/4
250A 745 580 270 450 R 1 250A 780 580 270 450 R 1
5. Operation
No. Parts Name
1 Body
2 Cover
3 Screen
4 Gasket
5 Plug
Dust, scale, and other foreign substances which flow into the inlet side of the strainer are removed by the
screen [3].

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To make the best use of the strainer and satisfy the operating requirements to the maximum, take
notice of the following.
6.1 Selection of nominal size
Select a strainer of the same nominal size as that of the pipe (nominal size of piping = nominal size of
strainer). Note that using a strainer of a smaller nominal size increases the pressure loss of the
strainer and may result in the pressure fallen below the specified level at the inlet side of the
equipment.
6.2 Selection of nominal pipe size
When selecting an appropriate nominal pipe size, it is necessary to consider fluid type, maximum flow
rate, permissible pressure loss, costs of piping and equipment, etc.
If the nominal pipe size is smaller, the costs of piping and equipment decreases while the pressure
loss through the pipe increases to generate disturbances, possibly resulting in pipe wear, noise and/or
vibration. If the nominal pipe size is too large, not only the costs of piping and equipment but also the
thermal loss increases.
As a reference, the standard flow velocity is specified in the Japanese Industrial Standards (JIS) as a
guide to select an appropriate nominal pipe size. See the following table.
<<Standard flow velocity>>
Fluid Remarks Standard flow
velocity
Saturated steam
Auxiliary piping for vacuum or
small-diameter piping 15 m/s [10-20]
Large-diameter piping 30 m/s [20-40]
Superheated steam
Piping diameter: approx. Φ75 –Φ250 40 m/s [30-50]
Piping of high-grade material 70 m/s [65-80]
Inlet of steam coil 0.3-0.7 MPa 30 m/s [25-30]
Air
Higher pressure: 1.0 MPa or more 20 m/s [20-25]
Lower pressure 15 m/s [5-15]
Extremely low pressure: 0.1 MPa or less 10 m/s [3-10]
Water, Oil 2 m/s [2- 4]
* The above table is based on the requirements in JIS F 7101 “Shipbuilding - Pipes of
machinery - standard velocity of flow”.
6.
Nominal Size Selection

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6.3 Pressure Loss Chart
Model: SY-10 Strainer
Screen: φ6 - 8P perforations with 80 mesh filter
Nominal
size
ΔP: Pressure loss MPa
V: Flow rate L/min

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7. Maintenance
7.1 Precaution for installation
Caution
1. When installing, check the direction of the product so that the fluid flowing and the arrow marked on
the product are in the same direction.
* Setting the product in wrong directions prevents the product from performing as intended.
2. When installing, secure the space to remove the screen.
* Failure to follow this notice hampers cleaning of the screen.
3. Do not apply excessive load, torque or vibration to the product.
* Failure to follow this notice may result in fluid leakage.
4. Clogging inside the product can be known from the differential pressure measured, when pressure
gauges are installed in upstream and downstream of the product.
[See Fig. 1 in “9. Piping Example.”]
5. The product shall be installed with its cover faced downward.
* If drainage or similar problem occurs in a steam line, incline the product to the position at which the
cover is kept horizontally.
6. If the product can only be installed to run the fluid from the bottom to the top, make sure to install a
blow valve in order to remove the scale accumulated at the bottom of the riser pipe.
[See Fig. 2 in “9. Piping Example.”]
7.2 Precaution for operation
Warning
1. When the product is used for hot fluid, do not touch the product with bare hands.
* Failure to follow this notice may result in scalds or injury.
2. Do not retighten the cover after leading fluid into the product.
* Failure to follow this notice may damage the gasket and cause outside leakage.
* Failure to follow this notice may result in scalds or injury.
Caution
Use the product under a maximum pressure loss below 0.1 MPa. Periodically
clean the screen.
* Failure to follow this notice may damage the screen.

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8. Disassembly, Cleaning and Reassembly
Excessive amount of foreign substances inside the product reduces filtration area and hampers fluid
flow. If the product is kept for such condition, the screen is damaged and results in adverse effect on
the piping system due to excessive pressure difference.
8.1 Precaution for disassembly and inspection
Warning
1. Completely discharge the pressure inside of the product, piping and equipment prior to disassembly and
inspection. When fluid is hot, cool down the product.
* Failure to follow this notice may result in scalds or injury due to the residual pressure.
2. After checking the pressure gauge to make certain there is no pressure inside the body [1], remove the
cover [2] and screen [3]. Clean up the screen [3] by compressed air or water.
8.2 Precaution for reassembly
Caution
1. Clean the gasket contact surfaces of both the body and the cover.
* Improper cleaning may cause fluid leakage at the gasket resulting in scalds or injury.
2. When reassembling, replace the gasket with a new one.
* Failure to follow this notice may result in fluid leakage.
3. After cleaning the gasket contact surfaces of both the body [1] and the cover [2], attach a new gasket [4]
to the cover [2], and then attach the cleaned screen [3] into the groove on the cover [2]. Install the
assembly (cover [2], gasket [4], and screen [3]) to the body [1].
9. Piping Example
Fig. 1 Fig. 2

PDD-046f
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.