Y-strainer symbol
Also called Y-type strainer
A Y-strainer catches debris in a mesh screen held in a branch set at an angle to the line. It is cheap, compact and common on small lines.
What the Y-strainer symbol means
A Y-strainer catches debris in a mesh screen held in a branch set at an angle to the line. It is cheap, compact and common on small lines.
How it is drawn
A Y shape in the line, with the screen branch angled downwards.
The Y-strainer symbol in each standard
Drawn as on most US-style legend sheets.
Strainer. ISO has one strainer symbol for all body shapes: a narrow box with a dashed diagonal. The cone type is X8150.
ISO SVG
German (DIN): Schmutzfänger (Y-Form). See DIN P&ID symbols.
Where you see it on a P&ID
Upstream of pumps, control valves, steam traps and meters.
Tag codes
The Y-strainer is commonly tagged:
- S
- Y
Tag formats follow the project numbering procedure. For instruments, the letters follow ISA 5.1, explained on the instrument symbols page.
Related symbols
Frequently asked questions
What does the Y-strainer symbol look like on a P&ID?
A Y shape in the line, with the screen branch angled downwards.
What is a Y-strainer used for?
A Y-strainer catches debris in a mesh screen held in a branch set at an angle to the line. It is cheap, compact and common on small lines. Upstream of pumps, control valves, steam traps and meters.
What tag does a Y-strainer have?
It is commonly tagged S, Y. The exact tag format comes from the project numbering procedure and the legend sheets.
Is the Y-strainer symbol the same in ISA and ISO?
No. ISO has one strainer symbol for all body shapes: a narrow box with a dashed diagonal. The cone type is X8150. The ISO 10628-2 registration number is X8090. Always check the legend sheets at the front of the P&ID set.
What is the Y-strainer called in German?
Schmutzfänger (Y-Form). On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2.
- In production since 2014
- Thousands of daily users
- On MODEC FPSO projects since 2016