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AAL FRP Multi-Bag Filter Housing for Pre-Treatment and High Flow Industrial Water Filtration
- Robust FRP Construction with Superior Corrosion Resistance
- Multi-Bag Configuration for High Filtration Capacity
- Heavy-Duty Top Cover and Precision Sealing System
- Easy Operation with Tool-Free Opening
- Efficient Internal Guiding and Bag Positioning Structure
- Multiple Inlet–Outlet Sizes for Flexible System Integration
- Lightweight, Easy Maintenance, and Long Service Life
The AAL FRP Multi-Bag Filter Housing, engineered by AAL Filter, is a high-performance filtration system designed to meet the requirements of large-flow industrial applications. Constructed from premium fiberglass reinforced plastic (FRP), the housing provides outstanding corrosion resistance, excellent mechanical strength, and long-term durability even in harsh chemical, seawater, and industrial environments.
Supporting 2 to 12 standard #2 filter bags (Φ180 × 820 mm), this multi-bag design significantly increases filtration area, dirt-holding capacity, and operational efficiency. The system is ideal for high-volume pre-filtration, coarse filtration, and medium-precision liquid treatment processes.
AAL offers a comprehensive FRP product portfolio—including melt-blown cartridge housings, single-bag housings, high-flow cartridge housings, and multi-stage systems—to ensure full compatibility across flow demands and installation layouts.
Key Features
1. Robust FRP Construction with Superior Corrosion Resistance
Manufactured using advanced fiberglass winding and compression-molding techniques, the housing delivers exceptional corrosion protection and structural stability. It is suitable for seawater desalination, chemical processing, and corrosive liquid applications.
2. Multi-Bag Configuration for High Filtration Capacity
Available in 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12-bags configurations, the housing accommodates high flow rates while reducing maintenance frequency. Each #2 filter bag offers large surface area for extended service cycles.
3. Heavy-Duty Top Cover and Precision Sealing System
The reinforced top-cover design integrates an adjustable sealing nut that ensures secure, leak-free operation even under fluctuating pressure conditions, ensuring consistent filtration quality.
4. Easy Operation with Tool-Free Opening
Equipped with a manual lifting ring, operators can easily open or close the housing without tools—minimizing maintenance time.
5. Efficient Internal Guiding and Bag Positioning Structure
A built-in guiding system ensures fast and accurate alignment of filter bags during installation, preventing bypass and improving operational reliability.
6. Multiple Inlet–Outlet Sizes for Flexible System Integration
Inlet and outlet sizes can be selected as DN100, DN125, DN150, DN200, or DN250, meeting diverse pipeline requirements for large-flow industrial systems.
7. Lightweight, Easy Maintenance, and Long Service Life
Compared with metal housings, FRP structures are lighter, easier to handle, and offer a longer life cycle with minimal risk of corrosion, scaling, or structural degradation.
Working Principle
During operation, pressurized liquid enters the FRP multi-bag housing and flows through multiple #2 filter bags simultaneously. Suspended solids and contaminants are captured either on the surface or inside the depth layer of the filter media. The filtered liquid exits the housing with significantly lower turbidity.
Depending on the selected filter bags, filtration ratings range from 0.2 to 200 μm, making the system suitable for a wide variety of industrial purification applications.
Model Specifications
Installation Dimensions
Specifications
Model | AAL2-2B | AAL2-3B | AAL2-4B | AAL2-5B | AAL2-6B | AAL2-7B | AAL2-12B (8-12) |
Filter Bag Size | #2(Ф180 × 820) | ||||||
Bag Qty | 2 | 3 | 4 | 5 | 6 | 7 | 8-12 |
Cap Dia | 500 | 500 | 620 | 725 | 725 | 725 | 920 |
Height L1 | 1310 | 1310 | 1380 | 1405 | 1405 | 1405 | 1540 |
Height L2 | 1000 | 1000 | 1000 | 1040 | 1040 | 1040 | 1030 |
Height L3 | 278 | 278 | 278 | 280 | 280 | 280 | 290 |
In-outlet | DN100 | DN125 | DN125 | DN150 | DN150 | DN200 | DN250 |
Max Flow m³/h | 45-60 | 75-90 | 100-120 | 130-150 | 160-180 | 190-210 | 220-360 |
D Outer Dia | 437 | 437 | 520 | 647 | 647 | 647 | 860 |
D2 Install Dim | 346 | 346 | 393 | 495 | 495 | 495 | 495 |
Tips: The inlet and outlet sizes are available in DN100, DN125, DN150, DN200 and DN250.Working Temp：5-66℃ .
Max Working pressure: 0.8 MPa Dimension unit: mm .
Applications
The AAL FRP Multi-Bag Filter Housing is widely used in industries requiring high flow capacity, strong corrosion resistance, and stable filtration performance:
● Industrial water treatment and cooling water systems
● Large-scale chemical processing
● Seawater desalination and pretreatment
● Food and beverage production
● Petrochemical, coatings, and electronic plating lines
● Environmental protection and wastewater treatment
● Pharmaceutical and fine chemical industries
Precautions
● Ensure the filter bag is correctly installed and tighten the sealing block nut securely
● Do not exceed the rated working pressure (≤ 6 kg/cm²).
● Before system startup, open the air-release valve and close it once all air has been expelled.
● The inlet-outlet pressure difference should not exceed 1.5 kg/cm²; replace filter media promptly once this limit is reached.
Your High-Capacity FRP Filtration Solution for Industrial Efficiency
Upgrade your liquid filtration system with the AAL FRP Multi-Bag Filter Housing—engineered for long service life, corrosion resistance, and reliable performance in high-demand environments.
Whether you are expanding production capacity or optimizing your filtration process, our FRP multi-bag systems deliver consistent results with reduced downtime and operational cost.
Contact us today for specification sheets, quotations, or technical support for your upcoming filtration project.
