Fabricated Duplex Strainer
A twin-basket strainer for systems that cannot be shut down to service a screen. Changeover is by butterfly or three-way ball valve, giving a bubble-tight shut-off between the two chambers.
At a glance
- Size range
- 2" to 20"
- Arrangement
- Two separate basket housings
- Changeover
- Butterfly or three-way ball valve
Specification
| Size range | 2" to 20" |
|---|---|
| Arrangement | Two separate strainer basket housings |
| Changeover | Butterfly valve or three-way ball valve |
| Service | High pressure and temperature duties, and high viscosity services, where a sturdy screen is required |
| Rating | ASME Class 150 to 300 |
| Connection type | Flanged, welded or grooved |
| Flange type | SORF or WNRF |
| Body material | IS 2062, SA 516 Gr. 70, A 106 or stainless steel |
| Element | SS 316 or duplex steel |
| Element design | UL 331 |
| Flange material | IS 2062, A 105 or stainless steel |
| Bolts and nuts | Carbon steel or stainless steel |
| Screen | Open area | Opening |
|---|---|---|
| Perforated, IPA 120 | 58% | — |
| Perforated, IPA 118 | 51% | — |
| Perforated, IPA 113 | 40% | — |
| Perforated, IPA 106 | 23% | — |
| Perforated, IPA 102 | 23% | — |
| 20 mesh | 49% | 0.035" |
| 30 mesh | 45% | 0.022" |
| 40 mesh | 41% | 0.016" |
| 60 mesh | 38% | 0.010" |
| 80 mesh | 36% | 0.008" |
| 100 mesh | 30% | 0.006" |
Construction & operation
A twin-basket strainer for fuel, oil or water pipework, removing large particles of dirt and debris. Two separate basket housings let one be serviced while the other stays in flow, for lines that cannot be shut down.
Changeover is by butterfly valves or a three-way ball valve, giving a bubble-tight shut-off between the chambers — essential on negative-head pump suction systems.
Suited to services that need an extremely sturdy screen: high pressure and temperature duties, and high viscosity fluids.
Filtration level. When choosing a perforation or a mesh-and-perforation combination, avoid overstraining: as a rule the specified filtration should be no finer than half the size of the particle to be removed. Too fine a filtration raises the pressure drop very rapidly and can damage the basket.
Where it is used
Part of these fire fighting solutions
Fire Hydrant SystemPlant-wide ring main, hydrants, monitors and hose boxes, sized to the site.
Fire Pump House and ReservoirPumps, drivers, suction reservoir and controls — the source everything else runs on.
Fire Water Spray SystemMedium and high velocity spray for vessels, transformers and process equipment.
Specified for these hazards
Cable Galleries / TrenchesLinear heat detection with water spray or clean agent.
Conveyor BeltsLinear detection and deluge along the belt run.
Pipeline ManifoldsSpray protection at valve and manifold congestion.
Pump & Compressor AreasSpray protection over rotating equipment and seal leakage points.
Sphere & BulletWater spray for cooling and exposure protection on pressurised storage.
Transformers & SwitchyardsHigh velocity water spray, with drainage and separation designed in.
Truck & Rail GantryFoam and water spray over loading bays, with detection at the arms.
Downloads
- Product datasheetPDF ↓
Images · 2
Main view
Pressure drop, liquids, 2" to 20"
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