Product
Ingersoll Rand ATN18504 Air Filter Element | ATN 185kW Centrifugal Compressor
Genuine Ingersoll Rand ATN18504 air filter element for ATN-series 185kW oil-free centrifugal compressors. Micro-fiberglass media delivers 99.5% filtration efficiency at 3.0 μm, low initial pressure drop, and high dust-holding capacity to protect precision impellers and diffusers.
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Ingersoll Rand ATN18504 Air Filter Element
ATN18504 is a genuine Ingersoll Rand air intake filter element engineered for ATN-series 185kW oil-free centrifugal compressors. Using micro-fiberglass media, it captures 99.5% of particles at 3.0 μm, protecting the high-speed impeller and diffuser from dust and particulate wear while supporting ISO 8573-1 Class 0 oil-free air quality.
As a core consumable in the centrifugal compressor intake filtration system, ATN18504 is manufactured to Ingersoll Rand global technical standards, offering low initial pressure drop, high dust-holding capacity, and extended service life to reduce energy consumption and unplanned downtime.
Key Specifications
| Item | Specification |
|---|---|
| Part Number | ATN18504 |
| Brand | Ingersoll Rand |
| Component | Air Filter Element |
| Product Line | CC (Centrifugal Compressor) |
| Compatible Models | ATN-series oil-free centrifugal compressors (185kW range) |
| Unit of Measure | EA |
| Availability | Normally in stock |
Filtration Performance
- Filtration Rating: 3.0 μm
- Efficiency: 99.5% @ 3.0 μm
- Filter Class: F7 (medium-high efficiency, per EN 779 / ISO 16890)
- Dust-Holding Capacity: Approx. 3.5 kg (at rated flow, final resistance)
- Beta Ratio: β₃.₀ ≥ 200
The micro-fiberglass media in ATN18504 delivers 99.5% efficiency at 3.0 μm, significantly exceeding standard rotary-screw compressor filters (F5, 98% @ 5 μm). This higher cleanliness level protects the precision impeller and diffuser of 185kW centrifugal compressors.
Flow and Pressure Drop
- Rated Air Flow: Approx. 25–40 Nm³/min (for 185kW centrifugal units)
- Initial Pressure Drop: Approx. 220–300 Pa (clean, rated flow)
- Operating Differential: 300–550 Pa
- Alarm / Final Resistance: Alarm at 650 Pa; final resistance 800 Pa (replace immediately)
- Energy Impact: Every 100 Pa increase in intake pressure loss raises compressor shaft power by approx. 0.35%
The micro-fiberglass design achieves approximately 40% lower clean pressure drop and 89% higher dust-holding capacity than comparable alternatives, reducing energy use and extending replacement intervals.
Dimensions and Installation
- Dimensions: Approx. φ420 × φ220 × 380 mm (OD × ID × H)
- Effective Filter Area: Approx. 12–15 m² (pleated cartridge)
- Pleats: Approx. 200–240 pleats, 6–8 mm pitch
- Connection: Flange / end-cap groove interface to filter housing
- Sealing: Polyurethane (PU) foam gasket integrated into end frame for zero-leak fit
Materials of Construction
- Media: Micro-fiberglass
- Media Weight: Approx. 120–150 g/m²
- Support: Inner galvanized metal mesh + outer protective mesh to prevent media collapse
- End Caps: Polystyrene frame — lightweight, corrosion-resistant, incinerable
- Gasket: One-piece polyurethane (PU) foam, high elasticity, seamless seal
- Adhesive: Polyurethane bonding, heat-resistant, no delamination
Operating Conditions
- Operating Temperature: Continuous -20°C to 80°C; max 93°C (200°F)
- Relative Humidity: ≤95% RH, non-condensing
- Collapse Pressure: ≥ 2.8 kPa overall
- Features: Low initial pressure drop, high dust-holding capacity, long service interval, zero-leak seal
Service Life and Storage
- Service Life: Approx. 6,000–8,000 hours (8–12 months) under standard conditions; 3,000–4,000 hours in high-dust environments
- Shelf Life: 36 months in original sealed packaging, dry, ambient temperature
Standards
- ISO 5011 — Inlet air filters for internal combustion engines and compressors: efficiency and dust capacity
- ISO 16889 — Hydraulic fluid power filters: beta ratio determination
- ISO 16890 / EN 779 — General ventilation air filter classification
- ISO 29463 — High-efficiency air filters (HEPA/ULPA) performance testing
- GB/T 14295 — Air filters
- GB/T 6165 — Air filter performance test methods (efficiency and resistance)
Maintenance and Installation
Replacement Schedule
- Standard conditions: every 6,000–8,000 hours or 8–12 months, whichever comes first
- High-dust conditions (mining, building materials, cement, steel): every 3,000–4,000 hours
- Replace immediately when differential pressure alarm triggers (≥650 Pa)
Installation Steps
- Shut down and lock out: Disconnect main power, apply LOTO, confirm the unit is fully stopped and depressurized.
- Open filter housing: Release clamps or bolts and remove the cover or access door.
- Remove old element: Pull the old ATN18504 straight up; check for gasket residue in the housing groove.
- Clean housing interior: Wipe inner walls and sealing surfaces free of dust, oil, and foreign matter.
- Inspect new element: Verify part number ATN18504; check media for damage, pleat deformation, and gasket aging.
- Install new element: Seat vertically in the housing center, ensuring the gasket contacts the sealing surface evenly without skew or twisting.
- Reassemble housing: Refit cover and tighten bolts or clamps evenly for a gap-free seal.
- Start and leak-check: Run the compressor, listen for air leaks at the filter, and confirm differential pressure returns to normal (initial drop should be 220–300 Pa).
Frequently Asked Questions
Q1: Which Ingersoll Rand compressors does ATN18504 fit?
A: ATN18504 is designed for Ingersoll Rand ATN-series 185kW oil-free centrifugal compressors. If unsure, provide the compressor serial number for precise matching.
Q2: How is ATN18504 different from a standard screw compressor air filter?
A: Centrifugal compressors require much higher intake cleanliness. ATN18504 uses micro-fiberglass media (99.5% @ 3.0 μm), while standard screw compressor filters are typically F5 (98% @ 5 μm). Using a standard filter can lead to impeller fouling, dynamic imbalance, and costly impeller damage.
Q3: How do I know when to replace the filter?
A: Replace when: (1) differential pressure reaches the 650 Pa alarm; (2) the 6,000–8,000 hour or 8–12 month interval is reached; or (3) visual inspection shows media damage or gasket deformation.
Q4: Is ATN18504 a genuine original part?
A: ATN18504 is a genuine Ingersoll Rand original accessory, manufactured to Ingersoll Rand global technical standards and compatible with original intake filter housings.
Q5: Is one filter element sufficient?
A: Centrifugal compressor intake filters may use single or multiple elements depending on the filter assembly specification. Provide the serial number to confirm the correct quantity.
Related Part Numbers
| Part Number | Description | Notes |
|---|---|---|
| ATS11057 | Air Filter Element | ATS-series centrifugal compressor intake filter (110kW) |
| ATN09504 | Air Filter Element | ATN-series centrifugal compressor intake filter (95kW) |
| ATN10504 | Air Filter Element | ATN-series centrifugal compressor intake filter (105kW) |
| ATN72018 | Air Filter Element | ATN-series large centrifugal compressor intake filter (720kW) |
| A29504376 | Air Filter Element | Oil-free screw compressor pre-filter (coarse) |
| A29504406 | Air Filter Element | Oil-free screw compressor main filter (H11 class) |
| A11516974 | Air Filter Element | Medium centrifugal compressor filter (panel type) |
| A13368674 | Air Filter Element | Large centrifugal compressor filter (panel type) |
Note: Technical parameters are compiled from Ingersoll Rand centrifugal compressor filtration system specifications and industrial filtration standards. For 100% accurate matching, please provide the complete compressor serial number so we can check the original parts diagram and confirm current availability.