A Duplex Type Strainer is a continuous-flow filtration device designed to remove solid particles, debris, rust, scale, and other contaminants from liquid process lines without interrupting system operation. It consists of two separate strainer chambers connected through a changeover valve arrangement, allowing one basket to remain in service while the other is cleaned or maintained.
Duplex Type Strainers are widely used in critical industrial applications where uninterrupted flow is essential. These strainers provide reliable protection for pumps, valves, flow meters, heat exchangers, compressors, and other downstream equipment while minimizing downtime and maintenance interruptions./p>
Commonly used in industries such as oil & gas, petrochemicals, power generation, pharmaceuticals, food & beverage, marine, water treatment, and chemical processing, Duplex Type Strainers ensure efficient filtration and continuous process operation even during cleaning or replacement of the filter element.
Applications of Duplex Type Strainer
- Oil & Gas Processing Plants
- Petrochemical Industries
- Power Generation Facilities
- Water and Wastewater Treatment Plants
- Marine and Offshore Applications
- Chemical Processing Industries
- Food & Beverage Manufacturing
- Pharmaceutical Processing
- Cooling Water and Utility Systems
- Pump and Heat Exchanger Protection
Features of Duplex Type Strainer
- Continuous filtration without process shutdown
- Dual basket design for uninterrupted operation
- High dirt-holding capacity
- Low pressure drop and high flow efficiency
- Easy basket cleaning and maintenance
- Robust and corrosion-resistant construction
- Suitable for high-flow industrial applications
- Available in various sizes, materials, and filtration ratings
Available Options
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Manual Changeover Duplex Strainers
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Automatic Self-Cleaning Duplex Strainers
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Magnetic Basket Inserts
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Fine Mesh and Heavy-Duty Filtration Baskets
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Quick Opening Covers
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Drain and Vent Connections
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High-Pressure and High-Temperature Designs
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Special Alloy Construction (Monel, Hastelloy, Inconel, Duplex SS)
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Customized Basket Sizes and Filtration Ratings
Specifications
| Parameter | Details |
|---|---|
| Product Name | Duplex Type Strainer |
| Type | Continuous Flow Duplex Strainer |
| Size Range | 25 NB to 1200 NB (1" to 48") |
| Body Material | Cast Iron, Cast Steel, SS 304, SS 316, SS 316L, Duplex Stainless Steel |
| Basket Material | SS 304, SS 316, SS 316L |
| Filtration Element | Perforated Basket, Wire Mesh Basket, Combination Type |
| Mesh Size | 20 to 500 Mesh (Application Dependent) |
| Perforation Size | 1 mm to 25 mm |
| End Connection | Flanged, Threaded, Butt Weld |
| Flange Standard | ANSI, ASME, DIN, BS, IS |
| Pressure Rating | ANSI 150#, 300#, 600#, 900#, 1500# |
| Operating Pressure | Up to 150 Bar |
| Operating Temperature | Up to 500°C (Depending on Material) |
| Changeover Mechanism | Plug Valve / Ball Valve / Butterfly Valve Arrangement |
| Gasket Material | PTFE, Graphite, Spiral Wound, CAF |
| Cover Type | Bolted Cover / Quick Opening Cover |
| Testing | Hydrostatic, Leakage & Dimensional Testing |
| Compliance | ASME, ANSI, DIN, ISO Standards |
Benefits
Duplex Type Strainers provide continuous filtration without interrupting the process, making them ideal for critical applications where downtime is costly. Their dual-chamber design allows maintenance and cleaning to be performed while the system remains operational, improving productivity and reducing maintenance costs. With high dirt-holding capacity, robust construction, and reliable performance, Duplex Type Strainers help protect valuable equipment, enhance system efficiency, and ensure smooth industrial operations.