Yoshitake SY-20-10 is a high-flow-rate marine type Y-strainer designed with the largest possible filtration area to minimize flow rate decreases caused by clogging. It is widely used for removing dust, scale, and foreign matter from water, oil, and other fluids, and is especially suited for cooling water and industrial water applications. The strainer features a cast carbon steel body and a standard 80 mesh stainless steel screen.

Specifications

Specification	Value
Application	Steam, Air, Cold and hot water, Oil, Other non-dangerous fluids
Nominal Size	15A-150A
Maximum Pressure	1.0 MPa
Maximum Temperature	260°C
Connection	JIS 10K RF Flanged
Body Material	Cast Carbon Steel (SCPH2)
Screen Material	Stainless Steel (SUS304)
Perforation	φ6-8P (φ6-1.8 holes/cm²)
Mesh	80 mesh (Standard), 20-60 mesh available

Dimensions and Weights

Size	L	H1	ds	ls	Plug	Weight (kg)
15A	160	104	25	65.5	R 3/8	3.0
20A	160	113	30	71.5	R 3/8	3.7
25A	180	122	33	76.0	R 3/8	4.8
32A	240	154	55	105.0	R 1/2	8.0
40A	240	154	55	105.0	R 1/2	8.0
50A	260	174	57	112.0	R 1/2	10.5
65A	275	187	74	130.0	R 1/2	14.3

Details

Note: The nominal size range is up to 150A; this table presents the dimensions available from the truncated source excerpt.

Structure and Parts

No.	Name of Parts	Material
1	Body	Cast Steel (SCPH2)
2	Cover	Cast Steel (SCPH2)
3	Screen	Stainless Steel (SUS304)
4	Gasket	Non-Asbestos
5	Stud Bolt	Steel
6	Nut	Steel
7	Plug	Steel
8	Name Plate	Stainless Steel (SUS)

The screen (3) removes dust, scale, and other foreign matter from the fluid flowing from the inlet port of the strainer.

Pressure Loss

When selecting the nominal diameter of the pipe, consider the fluid kind, maximum flow rate, allowable pressure loss, and installation cost. A smaller diameter pipe lowers piping cost but increases pressure loss and the possibility of abrasion, noise, and vibration. If the pipe diameter is too large, both piping cost and heat loss increase.

Standard Flow Velocity of Fluid

Fluid	Standard Flow Velocity
Water, Oil	2 ~ 3 m/s (2~4)
Steam	30 ~ 40 m/s (20~40)

Installation

WARNING

Because of heavy weight, hold the valve with lifting equipment while piping. Failure to do so may result in injury due to dropping the valve.

Precautions

• Confirm if the direction of fluid flow matches the inlet and outlet port. If installed in the opposite direction, it will not function as designed.
• Carry out securing of pipes and the product properly to avoid excessive piping stress causing deformation.
• Reserve adequate space for maintenance and checking (cleaning of the screen).

1. In case installing pressure gauge at backward and forward of strainer, clogging can be checked by differential pressure.
2. Install strainer with the cap parts facing downward. However, install strainer with cap parts facing sideways in case of steam piping so that condensate accumulation is minimized.
3. If fluid flows from bottom to top, install a blow valve in order to remove scale accumulated at the bottom of the riser pipe.

Maintenance Space Requirements (H)

Size	H (mm)
15A	146
20A	158
25A	170
32A	223
40A	223
50A	248
65A	276
80A	342
100A	393
125A	467
150A	585

Maintenance and Troubleshooting

WARNING

Completely discharge internal pressure from the strainer, lines, and equipment, and cool the strainer down to a level where you can touch it with bare hands before disassembly and inspection. Since the screen is heavy, when extracting the screen from the body, secure it properly with lifting devices.

Disassembly Procedure After confirming that the remaining pressure is relieved from the strainer, remove the bolts from the cover and the gasket, and remove the cover from the body. Extract the screen from the body and clean it with compressed air or cleanser.

Assembly Procedure Clean the gasket contacting surface of the body and cap, and fit a new gasket to the cap. Fit the screen to the body and the cap before tightening the nut. Tighten the bolts evenly on each bolt in turn of diagonal position.

Troubleshooting

Trouble Condition	Cause of Trouble	Countermeasure and Remedy
No fluid flows	1. Screen is clogged up. 2. Stop valves at inlet and/or outlet side are shut.	1. Disassemble and clean the screen. 2. Open stop valves.
Pressure loss is excessive	1. Screen is clogged up. 2. Pressure gauge is damaged.	1. Disassemble and clean the screen. 2. Renew the pressure gauge.
Outer leakage occurs	1. Gasket has deterioration.	1. Replace the gasket.