Product
Ingersoll Rand ATN18504 Air Filter Element | 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. Match by serial number for exact fitment.
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Ingersoll Rand ATN18504 Air Filter Element
ATN18504 is a genuine Ingersoll Rand inlet air filter element engineered for ATN series 185kW oil-free centrifugal compressors. The micro-fiberglass media captures 99.5% of particles at 3.0 μm, blocking dust and particulate from entering the compression chamber to protect high-speed impellers and diffusers while supporting ISO 8573-1 Class 0 oil-free air quality.
As a core consumable in the centrifugal compressor inlet filtration system, ATN18504 is built to Ingersoll Rand global technical standards with low initial pressure drop, high dust holding capacity and extended service life—helping operators 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 class) |
| Unit of Measure | EA |
| Availability | In regular supply |
Technical Data
Filtration Performance
| Parameter | Value |
|---|---|
| Filtration Rating | 3.0 μm |
| Filtration 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, terminal resistance) |
| Beta Ratio β | β₃.₀ ≥ 200 |
The micro-fiberglass media achieves 99.5% efficiency at 3.0 μm—well above standard screw compressor elements (F5, 98% @ 5μm)—meeting the stringent inlet cleanliness demands of 185kW centrifugal machines.
Flow and Pressure Drop
| Parameter | Value |
|---|---|
| Rated Air Flow | Approx. 25–40 Nm³/min (for 185kW centrifugal class) |
| Initial Pressure Drop | Approx. 220–300 Pa (clean, rated flow) |
| Operating Differential | 300–550 Pa |
| Alarm / Terminal Resistance | Alarm: 650 Pa; Terminal: 800 Pa (replace immediately) |
| Pressure Drop vs. Energy | Every 100 Pa inlet loss increases shaft power by approx. 0.35% |
Designed with micro-fiberglass media, the ATN18504 offers 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
| Parameter | Value |
|---|---|
| Dimensions | Approx. φ420 × φ220 × 380 mm (OD × ID × Height) |
| Effective Filter Area | Approx. 12–15 m² (pleated cartridge) |
| Pleats / Pleat Pitch | Approx. 200–240 pleats, pitch approx. 6–8 mm |
| Mounting Interface | Flange / end-cap slot, mates with inlet filter housing |
| Sealing | Polyurethane (PU) foam gasket integrated into end frame, seamless zero-leak fit |
Construction Materials
| Parameter | Value |
|---|---|
| Media | Micro-fiberglass |
| Media Weight | Approx. 120–150 g/m² |
| Support | Inner galvanized metal support mesh + outer protective mesh |
| End Caps | Polystyrene frame, lightweight, corrosion-resistant, incinerable |
| Gasket | Polyurethane (PU) one-piece foam gasket, high elasticity |
| Adhesive | Polyurethane bonding for end caps and media, heat-resistant |
Operating Conditions
| Parameter | Value |
|---|---|
| Operating Temperature | Continuous: -20°C to 80°C; Max: 93°C (200°F) |
| Relative Humidity | ≤95% RH, no condensation |
| Collapse Pressure | ≥ 2.8 kPa overall |
| Features | Low initial pressure drop, high dust holding capacity, long service life, zero-leak seal |
Service Life and Storage
| Parameter | Value |
|---|---|
| Service Life | Standard conditions: approx. 6,000–8,000 hours (8–12 months); high-dust: 3,000–4,000 hours |
| Shelf Life | 36 months in sealed original packaging, dry ambient temperature |
Standards
- ISO 5011 — Inlet air filter performance testing (efficiency and dust capacity)
- ISO 16889 — Hydraulic filter beta ratio determination
- ISO 16890 / EN 779 — General ventilation air filter classification
- ISO 29463 — High-efficiency air filter performance testing
- GB/T 14295 — Air filters
- GB/T 6165 — Air filter performance test methods (efficiency and resistance)
Maintenance and Installation
Replacement Intervals
- 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 the inlet filter housing: Release latches or bolts and remove the cover or access door.
- Remove the old element: Pull the old ATN18504 straight up; check whether the gasket remains in the housing groove.
- Clean the housing interior: Wipe the inner walls and sealing surfaces free of dust, oil and foreign matter.
- Inspect the new element: Verify part number ATN18504, check media for damage, pleats for deformation, gasket for aging.
- Install the new element: Place vertically in the housing center, ensuring the gasket seats evenly without skew or twist.
- Refit the housing: Replace the cover and tighten bolts or latches evenly for a gap-free seal.
- Start up and leak-check: Run the compressor, listen for air leaks at the filter, and confirm the differential gauge returns to normal (initial drop 220–300 Pa).
FAQ
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 and we will match it precisely.
Q2: How is ATN18504 different from a standard screw compressor air filter?
A: Centrifugal compressors demand far higher inlet cleanliness. ATN18504 uses micro-fiberglass media (99.5% @ 3.0μm), while standard screw filters are typically F5 (98% @ 5μm). Using a standard filter can cause impeller fouling, imbalance and costly impeller damage.
Q3: How do I know when to replace the air filter?
A: Replace when: (1) differential pressure reaches the 650 Pa alarm; (2) service interval of 6,000–8,000 hours or 8–12 months is reached; or (3) visual inspection shows media damage or gasket aging.
Q4: Is ATN18504 a genuine OEM part?
A: ATN18504 is a genuine Ingersoll Rand part manufactured to Ingersoll Rand global technical standards and fits original inlet filter housings.
Q5: Is one filter element sufficient?
A: Centrifugal compressor inlet filter assemblies may use one or multiple elements. The quantity depends on the filter assembly specification—provide the serial number to confirm.
Related Parts
| Part Number | Name | Description |
|---|---|---|
| ATS11057 | Air Filter Element | ATS series centrifugal compressor inlet filter (110kW class) |
| ATN09504 | Air Filter Element | ATN series centrifugal compressor inlet filter (95kW class) |
| ATN10504 | Air Filter Element | ATN series centrifugal compressor inlet filter (105kW class) |
| ATN72018 | Air Filter Element | ATN series large centrifugal compressor inlet filter (720kW class) |
| 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 data above is compiled from Ingersoll Rand centrifugal compressor filtration specifications and industrial filter standards. For 100% accurate fitment, provide the complete compressor serial number so we can check the OEM parts diagram and confirm current supply. Contact us for quotation, datasheet or sample requests.