A box-type air filter for a gas turbine is a critical component in the air intake system, designed to protect the turbine from contaminants such as dust, dirt, and other particulate matter.
A box-type air filter for a gas turbine is a critical component in the air intake system, designed to protect the turbine from contaminants such as dust, dirt, and other particulate matter. These filters ensure that the air entering the gas turbine is clean, which is essential for maintaining efficiency, performance, and the longevity of the turbine.
Subject | Requirements |
Size: Nominal (inches) | 24x24×12 |
No. of Pleats | To be mentioned |
Type | High efficiency cartridge type air filter (box). |
Cell sides/ Filter Frame | Galvanized Metal / Aluminum/ Plastic (further enhanced with galvanized wire mesh. |
Separators in filter media | Filter media folded between corrugated aluminum/ plastic separators. |
Face guards | Permanently affixed to air entering sides & air leaving sides. (Assembly of the galvanized metal/plastic |
Header | Single header (flanged galvanized steel/plastic) at air entering side of the filter (No use of screw or nut bolt). |
Filter materials | Ultra-fine Glass fiber |
Filter Media | Filter media should be water resistant and withstand exposure to free moisture in the airstream. |
Thermal Stability | 70℃ |
Bursting strength (Pa) | >6225 Pa |
Protection Screen | Metallic/ Plastic |
Adhesive | Polyurethane |
Gasket | Seamless |
Initial Pressure drop(Pa) | Max 130 Pa @3400 m³/h |
Final resistance (pa) | 450 Pa as per EN779:2012 @3400 m³/h; |
Average Efficiency(%) | ≥95 as per EN779:2012 @3400 m³/h; |
Min. Efficiency(%) | 70%(for 0.4μm particles)@450Pa |
Dust Holding Capacity | Min.820 gm @450Pa as per EN779:2012; or Min 820 gm @300 Pa as per ISO 16890 |
Filter Class | F9 as per EN779:2012; or ISO ePM₂ s85%-95%/ISO ePM₁80%-90% as per ISO 16890. |
1. High Filtration Efficiency:
- Designed to capture fine particles, often with high efficiency (e.g., HEPA or ULPA filters for critical applications).
- Prevents damage to compressor blades and other internal components.
2. Durable Construction:
- Made from robust materials like synthetic media, fiberglass, or pleated filters to withstand harsh environmental conditions.
- Resistant to moisture, chemicals, and temperature variations.
3. Modular Design:
- Box-type filters are typically modular, allowing for easy installation, replacement, and maintenance.
- Can be configured in multi-stage filtration systems (e.g., pre-filters, main filters, and coalescing filters).
4. Low Pressure Drop:
- Engineered to minimize pressure drop across the filter, ensuring optimal airflow to the turbine and maintaining efficiency.
5. Self-Supporting Structure:
- The box-type design provides structural integrity, allowing the filter to handle high airflow rates without collapsing.
6. Fire Resistance:
- Many filters are treated with fire-retardant materials to reduce the risk of combustion in high-temperature environments.
7. Customizable Sizes:
- Available in various sizes and configurations to fit different gas turbine models and air intake systems.
- Power Generation: Used in gas turbine power plants to ensure clean air supply.
- Oil and Gas: Protects turbines in offshore and onshore facilities.
- Industrial Processes: Ensures reliable operation in industries using gas turbines for mechanical drive or power generation.
- Regular inspection and replacement of filters are necessary to maintain performance.
- Monitoring pressure differentials across the filter can indicate when replacement is needed.
