Duplex Check Valve
WDL Duplex Check Valve provides automatic prevention of reverse flow for seawater and desalination systems and offshore and marine pipelines. Connections, trim and operation are selected to the project conditions.
Description
Duplex Check Valve
WDL Duplex Check Valve provides automatic prevention of reverse flow for process systems that need high strength with resistance to chloride pitting and stress-corrosion cracking. Duplex stainless steel combines austenitic and ferritic phases for chloride service that requires higher strength than 300-series stainless steel.
Design Options
| Item | Available specification |
|---|---|
| Material | Duplex 2205, Super Duplex 2507 or project grade |
| Function | automatic prevention of reverse flow |
| Connections | Wafer, lugged, flanged or butt-welded |
| Operation | Self-actuated swing, lift, piston or dual-plate mechanism |
| Design basis | API 594, BS 1868, API 598 or project standard |
Typical Applications
- Seawater and desalination systems
- Offshore and marine pipelines
- Pulp and paper processing
- Pump discharge protection
- Backflow prevention in process lines
Selection Notes
Choose 2205, 2507 or another grade from chloride level, temperature, pressure and required pitting resistance.
Confirm installation direction, minimum flow, cracking pressure, slam risk and allowable pressure drop.
Frequently Asked Questions
Why select Duplex Stainless Steel for this check valve?
Duplex stainless steel combines austenitic and ferritic phases for chloride service that requires higher strength than 300-series stainless steel. Final suitability depends on the complete process conditions and the selected valve trim.
What information is needed for selection?
Provide the size, pressure rating, medium composition, concentration, temperature, connection standard, operating method and required quantity.
Send the process datasheet to WDL for material review, dimensional confirmation and quotation.
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