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. Match by serial number for exact fit.
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Ingersoll Rand ATN18504 Air Filter Element
The ATN18504 is a genuine Ingersoll Rand intake air filter element built for ATN-series 185kW oil-free centrifugal compressors. Its micro-fiberglass media captures 99.5% of particles at 3.0 μm, keeping dust and debris out of the compression chamber and protecting the high-speed impeller and diffuser from wear. This helps your machine maintain ISO 8573-1 Class 0 oil-free air quality.
As a core service part in the centrifugal compressor intake system, the ATN18504 is manufactured to Ingersoll Rand global technical standards. It combines low initial pressure drop, high dust-holding capacity, and long service life to reduce energy consumption and unplanned downtime.
Key Specifications
| Item | Specification |
|---|---|
| Part Number | ATN18504 |
| Brand | Ingersoll Rand |
| Part Name | Air Filter Element |
| Product Line | CC (Centrifugal Compressor) |
| Compatible Models | ATN-series oil-free centrifugal compressors (185kW class) |
| Unit of Measure | EA |
| Availability | Normally in supply |
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 and above — well above standard screw compressor intake filters (F5, 98% @ 5μm). This meets the higher intake cleanliness demands of centrifugal compressors and protects the precision impeller and diffuser of 185kW units.
Flow and Pressure Drop
| Parameter | Value |
|---|---|
| Rated Air Flow | Approx. 25–40 Nm³/min (for 185kW-class centrifugal units) |
| Initial Pressure Drop | Approx. 220–300 Pa (clean, rated flow) |
| Operating Differential Range | 300–550 Pa |
| Alarm / Terminal Resistance | Alarm: 650 Pa; terminal: 800 Pa (replace immediately) |
| Pressure Drop vs. Energy | Each 100 Pa rise in intake loss increases compressor shaft power by approx. 0.35% |
The micro-fiberglass design runs at roughly 40% lower clean pressure drop and offers about 89% higher dust-holding capacity than comparable alternatives, cutting 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 Spacing | Approx. 200–240 pleats, spacing approx. 6–8 mm |
| Mounting Interface | Flange / end-cap slot, mates with intake filter housing |
| Sealing | Polyurethane (PU) foam gasket integrated into end frame, seamless zero-leak fit |
Materials of Construction
| Parameter | Value |
|---|---|
| Media | Micro-fiberglass |
| Media Weight | Approx. 120–150 g/m² |
| Support Grid | Inner galvanized metal mesh + outer protective mesh, prevents media collapse |
| End Caps | Polystyrene frame — lightweight, corrosion-resistant, incinerable |
| Seal | One-piece polyurethane (PU) foam gasket, high elasticity, seamless fit |
| Adhesive | Polyurethane bonding end caps to media, heat-resistant, no de-bonding |
Operating Conditions and Service Life
| 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 |
| Service Life | Approx. 6,000–8,000 hours (8–12 months) standard; 3,000–4,000 hours in high-dust conditions |
| Shelf Life | 36 months sealed, in a dry, ambient-temperature environment |
Standards
- ISO 5011 — Intake filter performance testing (efficiency and dust capacity)
- ISO 16889 — Determination of filter beta ratio β
- 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 the differential pressure alarm triggers (≥650 Pa)
Installation Steps
- Shut down and lock out: Switch off the main power, apply lockout/tagout (LOTO), confirm the unit has fully stopped and is depressurized.
- Open the intake filter housing: Release the housing clamps or bolts and remove the top cover or access door.
- Remove the old element: Pull the old ATN18504 straight up and check whether the gasket has stuck in the housing groove.
- Clean the housing: Wipe the inner walls and sealing surface with a clean cloth — no dust, oil, or debris.
- Inspect the new element: Verify part number ATN18504, check media for damage, pleats for deformation, and gasket for aging.
- Install the new element: Lower it vertically into the housing center, ensuring the gasket seats evenly with no tilt or twist.
- Refit the housing: Replace the cover and tighten bolts or clamps evenly for a gap-free seal.
- Start up and leak-check: Run the compressor, listen for air leaks at the intake filter, and confirm the differential pressure gauge returns to normal (initial drop should read 220–300 Pa).
Frequently Asked Questions
Q1: Which Ingersoll Rand compressors does ATN18504 fit?
The ATN18504 is designed for Ingersoll Rand ATN-series 185kW oil-free centrifugal compressors. If you are unsure whether it fits your model, provide the compressor serial number and we will match it precisely.
Q2: How is ATN18504 different from a standard screw compressor air filter?
Centrifugal compressors demand far higher intake cleanliness than screw compressors. The ATN18504 uses micro-fiberglass high-efficiency media (99.5% @ 3.0μm), while standard screw compressor filters are only F5 (98% @ 5μm). Using a standard filter can cause dust buildup on the impeller, upset dynamic balance, and even lead to expensive impeller scrapping.
Q3: How do I know when to replace the air filter element?
Three triggers: ① operating differential pressure reaches the 650 Pa alarm value; ② the 6,000–8,000 hour or 8–12 month interval is reached; ③ visual inspection shows damaged media or an aged, deformed gasket.
Q4: Is ATN18504 a genuine original part?
Yes — ATN18504 is a genuine Ingersoll Rand original part, produced to Ingersoll Rand global technical standards and compatible with the original intake filter housing.
Q5: Is one filter element enough?
Centrifugal compressor intake filters may use one or multiple elements depending on the intake filter assembly specification. Provide your serial number to confirm the correct quantity.
Related Parts
| Part Number | Name | Description |
|---|---|---|
| ATS11057 | Air Filter Element | ATS-series centrifugal compressor intake filter (110kW class) |
| ATN09504 | Air Filter Element | ATN-series centrifugal compressor intake filter (95kW class) |
| ATN10504 | Air Filter Element | ATN-series centrifugal compressor intake filter (105kW class) |
| ATN72018 | Air Filter Element | ATN-series large centrifugal compressor intake 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: The technical parameters above are compiled from Ingersoll Rand centrifugal compressor filtration system specifications and industrial filtration standards. For a 100% exact match, provide the complete compressor serial number so we can check the original parts diagram and confirm current supply.