Y-Type Strainer -- Cast Steel Flanged ASME B16.34 WCB
Compact Inline Debris Strainer for Large-Bore Pipeline Protection
Document No.SV-DS-STR-003
RevisionRev A
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
This datasheet describes heavy-duty Y-type strainers in WCB carbon steel for large-bore pipeline debris filtration in cooling water, process feed, and utility service.
Technical Specifications
| Parameter | Specification |
|---|
| Valve Size Range | DN50 to DN600 (2" to 24") |
| Pressure Rating | PN16 / PN40 / Class 150 / Class 300 |
| Body Material | WCB carbon steel, CF8 (SS304), CF8M (SS316) |
| Screen Material | SS304 or SS316 perforated sheet or wire mesh |
| Perforation | 1.5 mm, 3 mm, 6 mm standard; custom on request |
| Mesh Option | 20, 40, 60, 100 mesh SS316 wire mesh |
| Cover Type | Bolted flat cover with recessed gasket groove |
| Blow-Off Connection | 1" or 2" NPT blow-off valve with ball valve or gate valve |
| Temperature Range | -29°C to +425°C (WCB) |
| End Connections | Flanged ASME B16.5 / BS EN 1092-1 |
| Drain | 1/2" NPT drain plug at low point of body |
Materials of Construction
| Component | Material |
|---|
| Body | WCB carbon steel Y-pattern casting, rib-reinforced for high pressure |
| Cover | WCB flat cover, bolted, with spiral-wound gasket groove |
| Screen | SS304 or SS316 perforated cylinder with wire mesh overlay and reinforced top ring |
| Gasket | Spiral-wound SS316 + graphite for body/cover joint |
| Blow-Off Valve | WCB gate valve or SS316 ball valve, flanged or threaded connection |
| Drain Plug | CS hex plug with 1/2" NPT thread at body sump |
| Studs / Nuts | B7 studs with 2H heavy hex nuts, zinc-plated or hot-dip galvanised |
Testing & Inspection
| Test | Requirement |
|---|
| Test Standard | API 598 / ISO 5208 |
| Certification | CE, ISO 9001 |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | ASME B16.34 / BS EN 12516 |
Notes
- Y-strainer pressure drop at clean condition should be <0.05 bar; size for maximum flow to avoid excessive DP at high load.
- Blow-off valve must be opened slowly with downstream isolated to prevent pressurised debris discharge and operator injury.
- For sea water or corrosive service, specify CF8M (SS316) body and screen with cathodic protection or rubber lining.
- Screen must be inspected after first 48 hours of operation; initial construction debris often loads screen rapidly.
- For high-temperature service above 300°C, specify Inconel wire mesh to prevent oxidation of SS316 mesh.
