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Duplex Stainless Steel Basket Strainer Filter: Flanged/Threaded Connection for Continuous Industrial Filtration
  • Duplex Stainless Steel Basket Strainer Filter: Flanged/Threaded Connection for Continuous Industrial Filtration
  • Duplex Stainless Steel Basket Strainer Filter: Flanged/Threaded Connection for Continuous Industrial Filtration
  • Duplex Stainless Steel Basket Strainer Filter: Flanged/Threaded Connection for Continuous Industrial Filtration
  • Duplex Stainless Steel Basket Strainer Filter: Flanged/Threaded Connection for Continuous Industrial Filtration

Duplex Stainless Steel Basket Strainer Filter: Flanged/Threaded Connection for Continuous Industrial Filtration

Product Attribute: Size Range: DN50 ~ DN500
Pressure Rating: Class 150 ~ 300
Design Standard: ASME B16.34, MSS SP-95
Body Material: Duplex 2205 (ASTM A182 F51)
Filter Basket: Perforated Duplex 2205 (Std) / 316L
Mesh Size: 30 ~ 200Meshes (Standard 60Meshes)
End Connections: RF Flange (ASME B16.5)
Max Operating Temp: 150°C (EPDM) / 300°C (Graphite)
Design Pressure: 1.6MPa ~ 5.0MPa
Screen Area: 10x Pipe Cross-Section (Min)
Pressure Drop: < 0.1Bar (Clean Screen)
Gasket Material: EPDM / PTFE / Graphite
Surface Finish: 180 Grit Polish / Electropolish
Applications: Seawater, Chemicals, Oil & Gas
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Specification

Duplex Stainless Steel Basket Strainer Filter: Flanged/Threaded Connection for Continuous Industrial Filtration

I. Product Overview

TIANYU duplex stainless steel basket strainer filter is a high-performance industrial filtration solution engineered for continuous operation in demanding fluid processing systems. Comprising two parallel basket strainers connected via 3-way valves, it enables seamless switching between filter chambers—allowing one to operate while the other is cleaned or maintained. Crafted from 304/316 stainless steel, this filter balances corrosion resistance, high-pressure tolerance, and efficient particle removal, making it ideal for industries requiring uninterrupted filtration, such as petrochemicals, food & beverage, water treatment, and metallurgy. With a filtration range of 0.04μm to 1000μm and pressure handling up to 40bar, it effectively removes solids, debris, and contaminants from liquids and gases, protecting downstream equipment like pumps, valves, and meters from wear or clogging. Its flanged or threaded connections ensure easy integration into existing pipelines, while the quick-open cover design simplifies maintenance, solidifying its role as a reliable core component in continuous-process systems.

II. Key Attribute Specifications

Category Details
Size Range DN20~DN500 (3/4”~20”), accommodating flow rates from 5m³/h to 1000m³/h for diverse industrial pipelines.
Material Composition – Body & Baskets: 304 stainless steel (standard) for general corrosion resistance; 316 stainless steel (optional) for enhanced resistance to chlorides, acids, and seawater.
– Filter Screen: 304/316 stainless steel mesh, woven or sintered, with precise aperture control.
– Valves & Hardware: 3-way valves in stainless steel; fasteners in 304/316 to avoid galvanic corrosion.
Pressure Rating Up to 40bar (4.0MPa), suitable for high-pressure systems such as petrochemical pipelines, hydraulic circuits, and industrial water mains.
Temperature Range -20℃~200℃ (with EPDM gaskets); up to 300℃ with Viton gaskets, adapting to ambient, hot, or mildly cryogenic media.
Filtration Precision 0.04μm~1000μm, customizable via mesh selection (e.g., 5μm for fine chemicals, 500μm for large debris in water treatment).
Connection Type Flanged (ASME B16.5, RF) or threaded (NPT/BSPT), compatible with standard pipeline components for flexible installation.
Structural Features Two parallel filter chambers; 3-way valves for flow diversion; quick-open cover (bolt-on or clamp-type); vent valve for air release; drain valve for cleaning.
Performance Metrics – Filtration Efficiency: ≥99% for particles ≥ rated micron size.
– Pressure Drop: ≤0.1bar at rated flow (varies by size/filter mesh).
– Cycle Life: ≥10,000 operations for valves; filter baskets ≥5 years with proper maintenance.

Product Overview

III. Feature Description

A. Duplex Design for Continuous Filtration

The core advantage of this strainer lies in its duplex configuration: two independent basket filters connected by 3-way valves. When one filter is in operation, the other can be isolated for cleaning, emptying, or basket replacement—eliminating the need to shut down the entire system. This is critical for continuous-process industries: in a petrochemical plant, for example, it ensures uninterrupted flow of crude oil while removing sediment; in a food beverage facility, it maintains production during screen cleaning, avoiding costly downtime. The 3-way valves feature precise flow diversion, with minimal pressure drop during switching, ensuring stable system pressure.

B. Stainless Steel Corrosion Resistance

Constructed from 304 or 316 stainless steel, the filter excels in corrosive environments. 304 stainless steel, with 18% chromium and 8% nickel, forms a passive oxide layer resisting rust and mild chemicals—ideal for water treatment, dairy processing, or general industrial fluids. For harsher conditions (e.g., seawater, chlorinated water, or acidic solutions), 316 stainless steel (with molybdenum) provides superior pitting and crevice corrosion resistance, extending service life in offshore platforms or chemical processing lines. Both grades offer high tensile strength (≥515MPa), ensuring structural integrity under 40bar pressure.

C. High-Efficiency Basket Filtration

Each filter chamber houses a stainless steel basket with a precision-woven mesh screen. The basket’s cylindrical design maximizes filtration area, allowing high flow rates with minimal pressure drop. Fine mesh (0.04μm) captures submicron particles in pharmaceutical or electronics manufacturing, while coarser mesh (1000μm) removes large debris (e.g., pipe scale, sediment) in water mains. The basket is supported by a perforated base, preventing mesh deformation under high flow velocities—a key feature in turbulent systems like pump discharge lines.

D. Quick-Open Cover for Easy Maintenance

The filter’s cover features a quick-open design (bolt-on with handwheels or clamp-type) that allows rapid access to the basket. Unlike welded or flange-mounted covers, it can be opened in minutes, reducing maintenance time by 60% compared to traditional strainers. A vent valve releases trapped air during chamber re-pressurization, preventing water hammer; a drain valve simplifies debris removal during cleaning. This design is particularly valuable in industries with frequent filter checks, such as food processing (to maintain hygiene) or mining (to clear abrasive slurries).

E. Versatile Compatibility with Fluids

The filter handles a wide range of media: liquids (water, oils, chemicals), gases (compressed air, natural gas), and slurries (low-solids). Its stainless steel construction and compatible gaskets (EPDM for water, Viton for oils/chemicals) resist degradation from most industrial fluids, avoiding media contamination. In hydraulic systems, it protects pumps and valves from particulate wear; in beverage production, it ensures product purity by removing sediment and foreign particles.

IV. Manufacturing Processes

A. Material Preparation & Quality Validation

  • Stainless Steel Sourcing: 304/316 stainless steel plates or billets are sourced from certified mills, with chemical composition verified via spectral analysis (e.g., 316: 16-18% Cr, 10-14% Ni, 2-3% Mo) to ensure corrosion resistance.
  • Defect Detection: Raw materials undergo ultrasonic testing to identify internal flaws (porosity, cracks) that could compromise pressure integrity in high-pressure applications.

B. Body & Chamber Fabrication

  • Forming: Filter bodies and chambers are fabricated via forging (for high-pressure models) or precision welding (for large diameters). Forging enhances material density, critical for withstanding 40bar pressure; welded bodies are post-weld heat-treated to relieve internal stresses.
  • Machining: Chamber interiors, valve ports, and connection surfaces are CNC-machined to tight tolerances (±0.05mm). Flange faces are ground to Ra ≤3.2μm for leak-tight sealing; threaded connections (NPT/BSPT) are precision-cut to ensure compatible assembly with pipes.

C. Filter Basket & Screen Production

  • Basket Construction: Stainless steel sheets are laser-cut and formed into cylindrical baskets, with perforated bases (1-3mm holes) for structural support. Seams are TIG-welded to prevent fluid bypass.
  • Mesh Attachment: Woven/sintered stainless steel mesh is secured to the basket frame via crimping or welding. Mesh aperture is verified using a micrometer to ensure filtration precision (e.g., 50μm mesh checked for uniform opening size).

D. Valve & Assembly Integration

  • 3-Way Valve Fabrication: Valves are machined from solid stainless steel, with precision-ground balls or plugs to ensure leak-free flow diversion. Seats are lapped to Ra ≤0.8μm for tight sealing.
  • Final Assembly: Chambers are connected to 3-way valves via flanged or threaded joints. Quick-open covers are fitted with gaskets (EPDM/Viton) and hinge hardware. Vent/drain valves are installed to facilitate maintenance.

E. Testing & Certification

  • Hydrostatic Test: Each filter is pressurized to 1.5×rated pressure (60bar for 40bar models) for 30 minutes, with no visible leakage or deformation.
  • Filtration Efficiency Test: Challenged with standardized particles (e.g., glass beads) to verify ≥99% removal at rated micron size.
  • Operation Test: 3-way valves are cycled 100+ times to ensure smooth switching; quick-open covers are tested for easy access and secure closure.

Valve Details

V. Product Advantages

A. Uninterrupted Production with Continuous Filtration

The duplex design eliminates shutdowns for cleaning—critical for industries like petrochemicals, where production halts cost thousands per hour. By switching to the standby chamber, operators can service the active filter without disrupting flow, maintaining process efficiency.

B. Superior Corrosion Resistance for Longevity

304/316 stainless steel construction resists rust, pitting, and chemical attack, outperforming carbon steel filters in humid or aggressive environments. In coastal water treatment plants, 316 models show 70% less corrosion than carbon steel alternatives over a 5-year period, reducing replacement costs.

C. High Filtration Efficiency Protects Downstream Equipment

By removing 99% of particles ≥ rated size, the filter prevents wear on pumps, valves, and meters. In a hydraulic system case study, installing TIANYU duplex strainers reduced pump maintenance by 40% by eliminating abrasive particle damage to impellers.

D. Low Maintenance & Operational Costs

Quick-open covers and accessible baskets cut maintenance time by 60% compared to traditional strainers. Reusable stainless steel baskets eliminate the need for disposable filter cartridges, lowering long-term consumable costs—especially in high-flow systems.

E. Versatile Adaptation to Industrial Needs

With customizable mesh sizes (0.04μm~1000μm), connections (flanged/threaded), and materials (304/316), the filter adapts to diverse applications: from fine chemical filtration to heavy-duty debris removal in mining slurries.

Application

VI. Product Applications

A. Petrochemical & Oil/Gas

  • Crude Oil Processing: Removes sediment, scale, and paraffin from pipelines to protect pumps and heat exchangers.
  • Refinery Systems: Filters fuels (gasoline, diesel) and process fluids to prevent catalyst contamination in cracking units.

B. Food & Beverage

  • Beverage Production: Filters fruit juices, beer, and water to remove pulp, yeast, and particulate matter, ensuring product clarity.
  • Dairy Processing: Strains milk and cream to remove solids, maintaining hygiene and preventing clogging in pasteurizers.

C. Water Treatment & Utilities

  • Municipal Water Supply: Captures sediment, algae, and debris from raw water before treatment, protecting membrane filters and disinfection systems.
  • Wastewater Treatment: Removes large solids from influent to prevent damage to pumps and aeration equipment.

D. Industrial Manufacturing

  • Hydraulic & Lubrication Systems: Filters hydraulic oil and lubricants to remove metal particles, extending equipment life in machinery (presses, turbines).
  • Metallurgy: Strains cooling water and process fluids in steel mills, removing scale and slag to maintain heat exchanger efficiency.
TIANYU duplex stainless steel basket strainer filter: DN20~DN500, 40bar max pressure, 304/316 construction. Enables continuous filtration via dual chambers, ideal for petrochemical, food, and water treatment industries.Customize with: 316L stainless steel for extreme corrosion, finer mesh (0.04μm) for precision filtration, high-temperature Viton gaskets (300℃), or threaded connections for compact installations. Tailored to your fluid type, pressure, and filtration needs.

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