Product
Ingersoll Rand ATN18504 Air Filter Element | ATN 185kW Centrifugal Compressor Intake Filter
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. Serial-number matching available for accurate fit.
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Ingersoll Rand ATN18504 Air Filter Element — Product Details
1. Product Overview
ATN18504 is a genuine Ingersoll Rand intake air filter element for centrifugal compressors, engineered specifically for ATN-series 185kW oil-free centrifugal compressor units. The element uses micro-fiberglass filtration media with a filtration efficiency of over 99.5% at 3.0 μm, effectively blocking dust and particulate matter from entering the compression chamber. This protects the high-speed precision impeller and diffuser from wear and helps maintain ISO 8573-1 Class 0 oil-free air quality.
As a core spare part of 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.
2. 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 power range) |
| Unit of Measure | EA (each) |
| Availability | In regular supply |
3. Technical Parameters
3.1 Filtration Performance (Core Indicators)
| 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) |
| Filtration Ratio β | β₃.₀ ≥ 200 |
ATN18504 uses micro-fiberglass media with 99.5% filtration efficiency at 3.0 μm and above — significantly higher than standard screw compressor air filters (F5 class, 98% @ 5 μm). It meets the stringent intake cleanliness requirements of centrifugal compressors and protects the precision impeller and diffuser of 185kW units.
3.2 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, at rated flow) |
| Operating Differential Pressure | 300–550 Pa |
| Alarm / Final Resistance | Alarm: 650 Pa; Final: 800 Pa (must replace) |
| Pressure Drop vs. Energy | Every 100 Pa increase in intake pressure loss adds approx. 0.35% to compressor shaft power |
The micro-fiberglass media design delivers approximately 40% lower clean pressure drop and approximately 89% higher dust-holding capacity compared to similar competing elements, reducing compressor energy consumption and extending replacement intervals.
3.3 Dimensions and Installation
| Parameter | Value |
|---|---|
| Dimensions | Approx. φ420 × φ220 × 380 mm (OD × ID × height) |
| Effective Filtration Area | Approx. 12–15 m² (pleated cartridge unfolded area) |
| Pleats / Pleat Spacing | Approx. 200–240 pleats, spacing approx. 6–8 mm |
| Mounting Interface | Flange / end-cap groove type, mates with intake filter housing |
| Sealing | Polyurethane (PU) foam gasket integrated into end frame, seamless zero-leak fit |
3.4 Material Construction
| Parameter | Value |
|---|---|
| Media | Micro-fiberglass |
| Media Weight | Approx. 120–150 g/m² |
| Inner/Outer Support | Inner galvanized metal support mesh + outer protective mesh, prevents media collapse |
| End Caps | Polystyrene frame, lightweight, corrosion-resistant, incinerable |
| Gasket | Polyurethane (PU) one-piece foam gasket, high elasticity, seamless fit |
| Bonding | Polyurethane adhesive bonds end caps to media, heat-resistant, no debonding |
3.5 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 pressure ≥ 2.8 kPa |
| Special Features | Low initial pressure drop, high dust-holding capacity, long replacement interval, zero-leak seal |
3.6 Service Life and Maintenance
| Parameter | Value |
|---|---|
| Service Life | Standard conditions: approx. 6,000–8,000 hours (8–12 months); high-dust conditions: 3,000–4,000 hours |
| Shelf Life | 36 months in original sealed packaging, dry environment at room temperature |
3.7 Standards
- ISO 5011: Inlet air cleaning equipment for internal combustion engines and compressors — performance testing (efficiency and dust capacity)
- ISO 16889: Hydraulic fluid power filters — determination of filtration ratio β
- ISO 16890 / EN 779: General ventilation air filters — classification
- ISO 29463: High-efficiency air filters — performance testing
- GB/T 14295: Air filters
- GB/T 6165: Test methods for air filter performance (efficiency and resistance)
4. Standard 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, etc.): every 3,000–4,000 hours
- Replace immediately when differential pressure alarm triggers (≥650 Pa)
Installation Steps
- Shut down and disconnect power: Switch off the main compressor power, apply lockout/tagout (LOTO), confirm the unit has fully stopped and pressure is released.
- Open the intake filter housing: Release housing clamps or bolts and remove the cover or access door.
- Remove the old element: Pull the old ATN18504 element straight up and check whether the gasket remains in the housing groove.
- Clean the housing interior: Wipe the housing inner walls and sealing surfaces with a clean cloth — no dust, oil, or foreign matter.
- Inspect the new element: Verify part number ATN18504, check media for damage, pleats for deformation, and gasket for aging.
- Install the new element: Place the new element vertically into the housing center, ensuring the gasket seats evenly against the sealing surface without tilting or twisting.
- Reassemble the housing: Refit the cover, tighten bolts or clamps evenly to ensure a gap-free seal.
- Start up and leak-check: Run the compressor, listen for air leaks at the intake filter, and check that the differential pressure gauge returns to normal (initial pressure drop should be 220–300 Pa).
5. 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 you are unsure about your model, provide the compressor serial number and we will match it precisely.
Q2: What is the difference between ATN18504 and 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 lead to dust buildup on the centrifugal impeller, imbalance, and even costly impeller damage.
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 shows media damage or gasket aging/deformation.
Q4: Is ATN18504 a genuine original part?
A: ATN18504 is a genuine Ingersoll Rand original part, manufactured to Ingersoll Rand global technical standards and compatible with original Ingersoll Rand intake filter housings.
Q5: Is one ATN18504 element enough?
A: Centrifugal compressor intake filters may use single or multiple elements. The exact configuration depends on the intake filter assembly specifications — please provide the compressor serial number to confirm.
6. Related Parts
| 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 element (panel type) |
| A13368674 | Air Filter Element | Large centrifugal compressor filter element (panel type) |
Note: The technical parameters above 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 supply information.