In today’s fast-paced industrial environment, efficient liquid filtration is essential to ensure safe, stable, and high-quality production. The Perforated Tube Filters No.2 Basket has become one of the most dependable filtration components thanks to its rugged design, consistent performance, and adaptability across multiple sectors. Engineered from premium stainless steel and manufactured with tight tolerances, this filter basket delivers reliable separation of solid contaminants even under demanding operating conditions.

1. Construction and Design

The Perforated Tube Filters No.2 Basket is typically manufactured from high-grade stainless steel—SS304, SS316, or SS316L—to guarantee exceptional resistance to corrosion, heat, and mechanical stress. The core of the basket is a precision-machined perforated metal tube with evenly distributed holes or slots that allow liquid to pass while retaining unwanted solids.

The “No.2” designation corresponds to standardized dimensions used globally for No.2 bag filter housings, ensuring perfect compatibility with most industrial filtration systems. Its cylindrical structure, reinforced rims, and durable handles allow for easy installation, removal, and routine cleaning.

Perforation specifications—including hole size (0.5 mm to 5 mm), open area ratio, and hole type (round, slotted, or square)—can be fully customized to balance filtration accuracy and flow capacity based on application requirements.

2. Working Principle

As liquid flows into the filter housing, it first encounters the perforated basket. Solid contaminants—such as metal chips, sand, paint residue, sludge, or resin—are trapped inside, while the filtered liquid passes through the perforations and continues downstream.

Many systems use a filter bag or mesh liner inside the basket. In this setup, the perforated basket provides structural support, preventing the bag from collapsing or tearing under high pressure or high flow conditions. This dual-layer design enhances filtration precision while maintaining excellent flow performance.

Thanks to its rigid construction, the basket withstands high differential pressure without deforming, making it ideal for heavy-duty operations.

3. Key Features and Advantages

The No.2 perforated filter basket offers a combination of performance, durability, and versatility highly valued across industries.

• Exceptional Strength and Longevity

Stainless steel construction resists vibration, impact, and high flow pressure, providing stable performance over long service cycles.

• Superior Corrosion Resistance

Suitable for corrosive fluids, chemical solutions, and harsh processing environments without degrading or rusting.

• Easy Cleaning and Low Maintenance

The basket is designed for easy removal and can be cleaned by manual washing, backflushing, or ultrasonic cleaning—significantly reducing downtime.

• Fully Customizable Options

Customers can select perforation type, hole size, thickness, height, finishes, and handle styles to meet specific system requirements, including sanitary-grade electropolishing.

• High Flow Efficiency

Uniform perforations promote smooth liquid flow with minimal pressure drop, ensuring efficient and uninterrupted system operation.

4.Parameter Boundaries

5. Common Applications

The Perforated Tube Filters No.2 Basket is widely used in systems handling liquids with suspended solids. Key industries include:

• Water and wastewater treatment – removing debris, sediment, and rust before downstream equipment

• Petrochemical and refinery processes – filtering fuels, cooling fluids, lubricants, and chemicals

• Food & beverage production – maintaining purity and sanitary compliance

• Pharmaceutical and biotechnology – preventing contamination and protecting critical equipment

• Paints, inks, and coatings – eliminating impurities for smoother consistency

• Machinery, hydraulic, and lubrication systems – protecting pumps, valves, and heat exchangers

• Marine and power generation – filtering circulating water, oils, and fuels

Thanks to its universal No.2 sizing, it easily replaces standard filter bags or functions as a stand-alone metal filter element in new or existing systems.

6. Customization Options

Manufacturers offer extensive customization to tailor each basket to its application:

• Materials: SS304, SS316, SS316L, carbon steel, or specialty alloys

• Perforation types: round, slotted, or hexagonal

• Hole sizes: 0.5–5 mm or customized

• Dimensions: basket height, diameter, flange design

• Surface treatment: pickling, polishing, electropolishing

• Handles: fixed, swing, or lifting ring

• Base design: flat, conical, or reinforced bottom

These options ensure the filter basket meets specific flow rates, filtration accuracy, and mechanical requirements.

7. Operation and Maintenance

Maintaining the basket is straightforward. Regular inspection ensures solid buildup doesn’t compromise flow. Depending on the contaminant type, cleaning may involve:

• manual rinsing

• high-pressure washing

• chemical cleaning

• ultrasonic cleaning

For systems with heavy solid loads, duplex filter setups allow continuous operation during cleaning cycles. The stainless steel design withstands repeated cleaning without structural damage, reducing replacement costs over time.

8. Performance and Service Life

Compared with plastic or fiber filter elements, stainless steel perforated baskets offer superior mechanical and thermal performance. They operate reliably at elevated temperatures (up to ~400°C depending on alloy) and handle high-viscosity liquids with ease.

The optimized open-area design keeps pressure loss low while ensuring thorough filtration. At the end of their long service life, the baskets are fully recyclable—supporting sustainable and environmentally responsible operations.

9.Municipal Wastewater Treatment Plant

Application: Filtration of sand, grit, and suspended solids

Flow Rate: 12–18 m³/h

Fluid: Raw wastewater / secondary effluent

Viscosity: ~1.0 mPa·s

Before Using Stainless Perforated Basket

• Frequent clogging of bag filters

• ΔP increased rapidly (up to 20–25 kPa)

• Filter bag life: 2–3 days

• Manual cleaning required daily

10. Conclusion

The Perforated Tube Filters No.2 Basket provides robust, efficient, and customizable filtration across countless industrial applications. Its stainless steel construction guarantees durability and corrosion resistance, while its precision-engineered perforations deliver consistent, high-quality filtration.

Whether used alone or combined with filter bags, this basket protects downstream equipment, improves product quality, and reduces maintenance costs. With flexible customization and long service life, it remains one of the most cost-effective and reliable solutions for modern liquid filtration systems.

The Perforated Tube Filters No.2 Basket combines durability, effiency, and adaptability, Making it an insipensable component in liquid filtration systems across a wide range of industries.Its stainless steel construction guarantees corrosion resistance and mechanical reliability, while its perforated design ensures optimal flow and filtration performance.

Whether used as a stand-alone filter or as a support for filter bags, this basket delivers consistent results, protectiong downstream equipment and ensureing product quality.With customizable options and long service life, the Perforated Tube Filters No.2Basket stands as a cost-effective, high-performance solution for industrial filtration challenges today and into the future.