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GB/T Flanged Y-Strainer
Y-TYPE 45° SCREEN · PN10–PN40 · INLINE FILTRATION
The GB/T Flanged Y-Strainer is an inline pipeline filtration
device designed to remove solid particulates, scale, and
debris from process fluids, protecting downstream equipment
including valves, pumps, meters, and heat exchangers from
damage and premature wear. The Y-type configuration (45°
screen angle) ensures minimal pressure drop while
maximizing filtration area and ease of maintenance.
| HG/T 21637 | |
|---|---|
| Pressure Rating | PN10 / PN16 / PN25 / PN40 |
| Size Range | DN15 – DN600 |
| Body Material | WCB · CF8 · CF8M |
| Screen | SS304 / SS316 mesh, 0.5–3mm |
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— Full Specifications
GB/T Flanged Y-Strainer - Parameter Table
| PARAMETER | SPECIFICATION |
|---|---|
| Standard | HG/T21637 |
| Pressure Rating | PN10 / PN16 / PN25 / PN40 |
| Size Range | DN15 – DN600 |
| Body Material | WCB (Carbon Steel) / CF8 (304SS) / CF8M (316SS) |
| Screen Material | SS304 / SS316 Stainless Steel Wire Mesh |
| Screen Perforation | 0.5mm / 1mm / 2mm / 3mm (Customizable) |
| End Connection | Flanged – GB/T 9113 / RF Face |
| Strainer Type | Y-Type (45° Screen Angle) |
| Drain Connection | DN15 / DN20 Threaded Drain Plug |
| Installation | Horizontal / Vertical |
| Leakage Class | GB/T 26480 / API 598 |
| Test Standard | GB/T 26480 / API 598 (100% Factory Pressure Test) |
| Temperature Range | -29°C ~ +425°C (Material Dependent) |
| Applicable Media | Water / Steam / Oil / Gas / Chemical Media |
Our Production Process
1. Casting
2. Machining
3. Testing
4. Loading
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This Product Spec Sheet
Single-page datasheet for GB/T Flanged Y-Strainer.
- Full parameter table
- Dimensional drawing
- Materials & standards list
- Ordering code guide
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— WHY bAUTU
Why Specify This Valve from Bautu
Stainless Steel Screen & Filtration Precision
The stainless steel wire mesh screen (SS304 / SS316) is available in multiple perforation sizes from 0.5mm to 3mm, providing customizable filtration precision for different process media and protection requirements. The robust screen construction withstands high flow velocities and pressure differentials without deformation, ensuring consistent filtration performance over extended service intervals.
Easy Maintenance & Drain Design
The Y-strainer features a removable screen cap and integrated DN15/DN20 threaded drain plug, enabling quick on-site screen cleaning and blowdown without pipeline shutdown. This design significantly reduces maintenance downtime and total cost of ownership in continuous industrial process systems
— FAQ
Frequently Asked Questions
What is a HG/T 21637 flanged Y-strainer?
HG/T 21637 is the Chinese chemical industry standard governing flanged Y-type strainers for industrial pipeline systems. A Y-strainer is a mechanical filter installed inline to remove solid particles, debris, and scale from pipelines, protecting downstream equipment such as pumps, meters, control valves, and heat exchangers from damage. Bautu manufactures HG/T 21637 flanged Y-strainers in pressure ratings from PN10 to PN40 and sizes from DN15 to DN600, in body materials including WCB carbon steel, CF8M stainless steel, and ductile iron.
What does the "Y" shape mean, and how does a Y-strainer work?
The "Y" refers to the angled body geometry — the strainer screen is housed in a leg that branches off the main flow path at approximately 45°. This design allows the screen to have a larger filtration area relative to the pipe bore, reducing pressure drop across the strainer and extending cleaning intervals. Flow enters the body, passes through the stainless steel mesh screen (standard 16–40 mesh, with finer options available), and exits clean. Captured particles collect in the screen pocket, which can be removed and cleaned by simply unscrewing the bottom plug or blow-off drain — without removing the strainer body from the pipeline. Y-strainers are suitable for both horizontal and vertical pipelines and handle steam, water, oil, gas, and chemical media.
What is the standard lead time, and can Bautu handle custom requirements?
Standard HG/T 21637 flanged Y-strainers are delivered in 2–4 weeks from order confirmation. Large bore sizes (DN400–DN600) or special materials typically require 4–6 weeks. Bautu supports custom configurations including fine mesh screens (60–200 mesh) for precise filtration, duplex or Hastelloy screen materials for corrosive media, magnetic inserts for ferrous particle removal, and blow-off valve connections for continuous-duty cleaning. Submit your pipeline specifications for a tailored quotation within 24 hours.
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