Welcome to the premier engineering and manufacturing authority for high-capacity fluid filtration, continuous-flow pipeline protection, and uninterrupted process utility infrastructure. Operating heavy-duty fabrication complexes, advanced machining bays, and certified pressure-compliance testing complexes, FlowBiz Export Private Limited has established itself as a trusted name in the valve and filtration manufacturing industry. With a strong focus on quality, innovation, and customer satisfaction, we stand as a leading Best Duplex Type Strainer Manufacturer, Supplier, and Exporter in Gandhinagar, India.
A FlowBiz duplex strainer (alternatively known as a twin basket strainer) is a highly specialized mechanical filtration system integrated into fuel, oil, or water piping systems to remove large particles of dirt, scale, and debris. While traditional single-basket Y-strainers or simplex pot strainers require the entire process line to be completely shut down and depressurized during a filter cleaning cycle, a duplex strainer system consists of two separate strainer basket housings linked by a centralized changeover valve mechanism. This advanced configuration permits plant operators to divert the fluid flow seamlessly from one chamber to the other without a single moment of process interruption, safeguarding downstream machinery like high-expenditure pumps, motors, meters, and nozzles under continuous operating cycles.
Every duplex strainer assembly undergoes strict hydrostatic pressure verification and chamber-switch testing before dispatch, ensuring absolute compliance with international engineering safety benchmarks.
| Engineering Parameter | Certified Product Specifications & Compliance Codes |
| Design Standards | Fully compliant with ASME Section VIII Div 1, ASME B16.34, and BS 2080 |
| Testing Standards | 100% hydrostatically verified to API 598 pressure and seat protocols |
| Chamber Configuration | Twin Basket Layout (Dual filtration bodies with integrated diverter valve) |
| Diverter Valve Style | High-Integrity Dual Butterfly Valve Linkage, 3-Way Plug, or Ball design |
| Sizing Envelope Array | Broad matrix of standard sizes to fit a variety of industrial piping networks |
| Pressure Class Control | Precision-engineered for ASME Class 150# through Class 600# systems |
| Wetted Process Flow | Bulk Industrial Water, Fuel Oils, Lubricants, Coolants, and Chemicals |
| Body Shell Metallurgy | Heavy-Wall Premium Mild Steel (MS) / Carbon Steel (ASTM A216 WCB) |
| Filter Basket Elements | High-Area Stainless Steel (SS304 / SS316) perforated sheet and mesh |
| External Surface Shield | High-Durability Protective Coating featuring a Professional Blue Finish |
The defining mechanical advantage of our duplex strainer is its ability to handle industrial-scale filtration efficiently while maintaining non-stop line operation. The duplex design allows for continuous operation; one chamber can be isolated, depressurized, and opened for cleaning while the other continues filtration. This design enables essential maintenance or cleaning without halting operations, completely reducing costly production delays and process downtime.
Our strainers are manufactured from premium mild steel (MS), providing high structural strength, impact durability, and excellent resistance to internal pressure surges. This heavy-duty material choice makes the housings ideal for extended field use in challenging environments, preventing casing deformation under intense mechanical loads.
A heavy-duty manual lever or gear-driven linkage control structure connects the twin chambers. With a simple 90 or 180turn, the operator safely diverts the process fluid path from the clogged basket chamber to the clean standby chamber. The low-friction internal seating ensures a tight, leak-proof isolation of the off-line chamber, allowing the operator to service the isolated filter basket with absolute safety.
The internal stainless steel baskets are meticulously engineered with an optimized open-area ratio to minimize localized fluid restriction and line pressure drops (P). On the exterior, the durable blue-coated finish not only gives the asset a professional appearance but also serves as a rugged shield that protects the underlying mild steel body from atmospheric corrosion, weathering, and industrial environments.
Our heavy-duty industrial duplex twin basket strainers provide essential component defense across major continuous-process loops:
Power Generation & Cooling Utilities: Filtering raw cooling tower water, condenser circuits, and main boiler feed lines to prevent heat exchanger scaling.
Petrochemical & Fuel Distribution: Removing particulate contamination from crude oil pipelines, fuel loading bays, lubrication loops, and diesel fuel transfer lines.
Chemical Manufacturing & Processing: Protecting high-pressure positive displacement pumps, automated control valves, and inline processing nodes from abrasive solids.
Marine & Industrial Marine Engine Rooms: Filtering shipboard seawater intake loops, bilge pumps, ballast systems, and centralized lubricating oil lines.
FlowBiz Export Private Limited maintains substantial production supply capabilities across primary industrial and engineering hubs, serving as a prominent Manufacturer, Supplier, and Exporter of Duplex Type Strainers in:
Gujarat: Rajkot, Ahmedabad, Vapi, Valsad, Surat, Gandhidham, Kutch, Ankleshwer, Bharuch, and Gandhinagar.
Maharashtra: Mumbai, Nashik, Pune, Thane, Aurangabad, Satara, Sangli, Nagpur, and Kolhapur.
Other Major Hubs: Corporate supply across Indore, Dewas, Bhopal, Chennai, Coimbatore, Salem, and all major manufacturing sectors across India and global export markets.
A: Duplex Type Strainers are installed directly into fluid pipelines to filter out unwanted solid particles, debris, and scale from flowing liquids. By capturing these contaminants before they travel down the line, they protect high-value equipmentsuch as pumps, motors, heat exchangers, instrumentation, and control valvesfrom mechanical wear and catastrophic blockages.
A: The outer structural twin housings are manufactured from premium-grade mild steel (MS) or carbon steel to offer maximum mechanical strength and long-lasting performance. The internal removable filter elements are crafted exclusively from high-grade stainless steel (SS304/SS316) to resist corrosion and chemical oxidation.
A: Duplex Type Strainers are highly recommended whenever uninterrupted filtration is critical to your plant's operation. Unlike single (simplex) strainers, which require you to halt fluid flow and shut down the pipeline during filter maintenance, a duplex model allows you to switch chambers and clean the dirty filter basket without a single moment of production interruption.
A: When the pressure gauge indicates that the active basket is filled with debris, the operator uses the manual changeover handle to divert the fluid flow to the clean standby chamber. Once diverted, the technician opens a pressure-vent valve on the isolated chamber, unscrews the top cover plate, lifts out the captured stainless steel basket, flushes it clean, and replaces it so it is ready for the next cycle.
A: Our strainers offer exceptional structural quality, heavy-duty construction, ease of changeover maintenance, and highly reliable filtration performance. Their standard sizing matrices ensure trouble-free compatibility with your existing flange layouts, while the protective blue coating provides rapid field visual identification and superior corrosion defense.
A: You can contact our sales and engineering team directly via phone, email, or our corporate website. As a leading manufacturer, supplier, exporter, and trader in Gandhinagar, India, we cater to both standard domestic projects and specialized international requirements with efficient technical order handling, material test report (MTR) compliance, and global logistical support.
Are you designing a continuous-flow cooling tower loop or expanding a fuel oil processing line that cannot afford routine maintenance shutdowns? Contact our Gandhinagar sales and engineering division today to secure a factory-direct quote on our Mild Steel Duplex Type Strainers, or ask a single relevant question regarding your specific fluid viscosity or filtration mesh criteria below to guide the conversation forward.

Price:
Price 4500 INR / Unit
Minimum Order Quantity : 1 Number
Material : Mild Steel / Ductile Iron / Stainless Steel body, PTFE lining
Features : High corrosion resistance, easy maintenance, removable screen
Temperature : Up to 200C (392F)
Application : Corrosive chemical filtration, chemical plants, pharmaceuticals, petrochemical industries, water treatment
Price 4000 INR / Unit
Minimum Order Quantity : 1 Number
Material : Carbon Steel, Stainless Steel (SS304, SS316), Alloy Steel, Brass (as required)
Features : Easy installation, Low maintenance, Durable construction, High filtration efficiency
Temperature : Up to 400C (Depending on material)
Application : Pipeline filtration in oil, gas, chemical, and water treatment industries
Price 4000 INR / Unit
Minimum Order Quantity : 1 Number
Material : Cast iron, carbon steel, stainless steel, bronze (subject to specific requirements)
Features : Easy basket removal, high dirt holding capacity, lowpressure drop, maintenancefriendly design
Temperature : Up to 220C (subject to material selection)
Application : Industrial filtration, chemical processing, water treatment, oil & gas, HVAC systems
Price 2000.0 INR / Number
Minimum Order Quantity : 1 Number
Material : MS
Features : Good Quality