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. Model range available; match by machine serial number.
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Ingersoll Rand ATN18504 Air Filter Element
Product Overview
ATN18504 is a genuine Ingersoll Rand intake air filter element designed for ATN-series 185kW oil-free centrifugal compressors. The micro-fiberglass media achieves over 99.5% filtration efficiency at 3.0 μm, blocking dust and particulate matter from entering the compression chamber. This protects the high-speed precision impeller and diffuser from wear, helping maintain ISO 8573-1 Class 0 oil-free air quality.
As a core spare part for the Ingersoll Rand centrifugal compressor intake filtration system, ATN18504 is manufactured to Ingersoll Rand global technical standards. It offers low initial pressure drop, high dust holding capacity, and long service life, helping operators reduce energy consumption and maintenance downtime.
Basic 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 range) |
| Unit of Measure | EA (each) |
| Availability | Normally in supply |
Technical Parameters
1. 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, final resistance) |
| Beta Ratio β | β₃.₀ ≥ 200 |
The ATN18504 uses micro-fiberglass media with 99.5% efficiency at 3.0 μm and above, significantly higher than standard screw compressor air filters (F5, 98% @ 5 μm). This meets the high intake cleanliness requirements of centrifugal compressors and protects the precision impeller and diffuser of 185kW units.
2. Flow and Pressure Drop
| Parameter | Value |
|---|---|
| Rated Air Flow | Approx. 25–40 Nm³/min (for 185kW centrifugal units) |
| Initial Pressure Drop | Approx. 220–300 Pa (clean, at rated flow) |
| Operating Differential Range | 300–550 Pa |
| Alarm / Final Resistance | Alarm: 650 Pa; Final: 800 Pa (replace immediately) |
| Pressure Drop vs. Energy | Every 100 Pa increase in intake loss raises compressor shaft power by approx. 0.35% |
The micro-fiberglass media design delivers approximately 40% lower clean pressure drop and 89% higher dust holding capacity than comparable alternatives, reducing energy consumption and extending replacement intervals.
3. Dimensions and Installation
| Parameter | Value |
|---|---|
| Dimensions | Approx. φ420 × φ220 × 380 mm (OD × ID × H) |
| Effective Filtration Area | Approx. 12–15 m² (pleated cartridge) |
| Pleats / Pleat Pitch | Approx. 200–240 pleats, pitch approx. 6–8 mm |
| Mounting Interface | Flange or end-cap slot type, mates with intake filter housing |
| Sealing | Polyurethane (PU) foam gasket integrated into end frame, seamless zero-leak fit |
4. Material Construction
| Parameter | Value |
|---|---|
| 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 | Polyurethane (PU) one-piece foam gasket, high elasticity, seamless fit |
| Adhesive | Polyurethane bonding end caps to media, heat-resistant, no debonding |
5. 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 | Overall collapse differential ≥ 2.8 kPa |
| Features | Low initial pressure drop, high dust holding capacity, long replacement cycle, zero-leak seal |
6. Service Life and Maintenance
| Parameter | Value |
|---|---|
| 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 |
7. Standards
- ISO 5011 — Inlet air cleaning equipment 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 — Test methods for air filter performance (efficiency and resistance)
Maintenance and Installation Steps
Replacement Interval
- 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 Procedure
- Shut down and isolate power — Turn off main compressor power, apply lockout/tagout (LOTO), confirm complete stop and depressurization.
- Open intake filter housing — Release housing clips or bolts, remove cover or access door.
- Remove old element — Pull the old ATN18504 element straight up; check whether the gasket remains in the housing groove.
- Clean housing interior — Wipe the housing inner wall and sealing surface with a clean cloth; ensure no dust, oil, or foreign matter.
- Inspect new element — Verify part number ATN18504, check media for damage, pleat deformation, and gasket aging.
- Install new element — Place vertically into the housing center; ensure gasket seats evenly on the sealing surface without skew or twisting.
- Reassemble housing — Refit cover, tighten bolts evenly or secure clips, ensuring a gap-free seal.
- Start up and leak-check — Run the compressor, listen for air leaks at the intake filter, and confirm differential pressure gauge returns to normal (initial drop should be 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 you are unsure about 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?
A: Centrifugal compressors require much higher intake cleanliness than screw compressors. ATN18504 uses micro-fiberglass high-efficiency media (99.5% @ 3.0 μm), while standard screw compressor filters are only F5 class (98% @ 5 μm). Using a standard filter can cause impeller fouling, dynamic balance loss, and even costly impeller wear and scrapping.
Q3: How do I know when to replace the air filter element?
A: Replace in three cases: ① operating differential pressure reaches the alarm value of 650 Pa; ② the 6,000–8,000 hour or 8–12 month interval is reached; ③ visual inspection reveals media damage or gasket aging/deformation.
Q4: Is ATN18504 a genuine original part?
A: ATN18504 is a genuine Ingersoll Rand original spare part, manufactured to Ingersoll Rand global technical standards and compatible with original intake filter housings.
Q5: Is one filter element enough?
A: Centrifugal compressor intake filter assemblies may use one or multiple elements. The exact quantity depends on the intake filter assembly specification. Please provide the machine serial number for confirmation.
Related Part Numbers
| Part Number | Name | Description |
|---|---|---|
| ATS11057 | Air Filter Element | ATS series centrifugal compressor intake filter (110kW range) |
| ATN09504 | Air Filter Element | ATN series centrifugal compressor intake filter (95kW range) |
| ATN10504 | Air Filter Element | ATN series centrifugal compressor intake filter (105kW range) |
| ATN72018 | Air Filter Element | ATN series large centrifugal compressor intake filter (720kW range) |
| 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 above are based on Ingersoll Rand official 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 supply information.