Ingersoll Rand ATN18504 Air Filter Element

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Product Overview

ATN18504 is a genuine Ingersoll Rand air intake filter element engineered specifically for ATN series 185kW oil-free centrifugal compressors. The element uses micro-fiberglass media to achieve over 99.5% filtration efficiency for particles down to 3.0 μm, preventing dust and particulate matter from entering the compression chamber and protecting the high-speed precision impeller and diffuser from erosion. This supports ISO 8573-1 Class 0 oil-free air quality.

As a core consumable in 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 extended service life, helping operators reduce energy consumption and maintenance downtime.

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Technical Specifications

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 delivers 99.5% efficiency at 3.0 μm, significantly higher than standard screw compressor air filters (F5, 98% @ 5 μm), meeting the stringent intake cleanliness requirements of centrifugal compressors and protecting the precision impeller and diffuser of 185kW units.

Flow and Pressure Drop

Parameter	Value
Rated flow	Approx. 25–40 Nm³/min (for 185kW class centrifugal units)
Initial pressure drop	Approx. 220–300 Pa (clean, at rated flow)
Operating differential range	300–550 Pa
Alarm / terminal resistance	Alarm: 650 Pa; terminal: 800 Pa (mandatory replacement)
Pressure drop vs. energy	Every 100 Pa increase in intake pressure loss raises compressor shaft power by approx. 0.35%

Designed with micro-fiberglass media, the ATN18504 provides approximately 40% lower clean pressure drop and 89% higher dust holding capacity compared to comparable alternatives, reducing energy consumption and extending replacement intervals.

Dimensions and Installation

Parameter	Value
Dimensions	Approx. φ420 × φ220 × 380 mm (OD × ID × height)
Effective filtration area	Approx. 12–15 m² (pleated cartridge)
Pleats / pleat spacing	Approx. 200–240 pleats, spacing approx. 6–8 mm
Mounting interface	Flange or end-cap slot, mates with intake filter housing
Sealing	Polyurethane (PU) foam gasket integrated into media end frame for zero-leak fit

Material Construction

Component	Material
Media	Micro-fiberglass
Media weight	Approx. 120–150 g/m²
Support	Galvanized metal inner support 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 of end caps to media, heat-resistant, no delamination

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 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 conditions: 3,000–4,000 hours
Shelf life	36 months in unopened packaging, dry ambient conditions

Standards

• ISO 5011: Inlet air cleaning equipment for internal combustion engines and compressors — performance testing
• ISO 16889: Hydraulic fluid power filters — determination of beta ratio
• 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)

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Maintenance and Installation

Replacement Intervals

• Standard conditions: every 6,000–8,000 hours or 8–12 months, whichever comes first
• High-dust environments (mining, construction materials, cement, steel): every 3,000–4,000 hours
• Replace immediately when differential pressure alarm triggers (≥650 Pa)

Installation Steps

1. Shut down and lock out: Disconnect main power, apply lockout/tagout (LOTO), confirm the unit has fully stopped and depressurized.
2. Open the intake filter housing: Release housing clamps or bolts and remove the cover or access door.
3. Remove the old element: Pull the old ATN18504 element straight up. Check that the gasket is not left in the housing groove.
4. Clean the housing interior: Wipe the inner walls and sealing surfaces with a clean cloth. Ensure no dust, oil or debris remains.
5. Inspect the new element: Verify part number ATN18504, check media for damage, pleat deformation and gasket aging.
6. Install the new element: Place vertically into the housing center. Ensure the gasket seats evenly on the sealing surface without tilting or twisting.
7. Reassemble the housing: Refit the cover and tighten bolts or clamps evenly to ensure a gap-free seal.
8. Start up and leak check: Run the compressor. Listen for air leaks at the intake filter and verify the differential pressure gauge returns to normal (initial drop should be 220–300 Pa).

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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 typically F5 (98% @ 5 μm). Using a standard filter can lead to impeller fouling, imbalance and potentially costly impeller damage.

Q3: How do I know when to replace the filter?

A: Replace when: (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 OEM part?

A: ATN18504 is a genuine Ingersoll Rand part manufactured to Ingersoll Rand global technical standards and fits original intake filter housings.

Q5: Is one filter element sufficient?

A: Centrifugal compressor intake filter assemblies may use one or multiple elements. The quantity depends on the intake filter assembly specification. Please provide the serial number to confirm.

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Related Parts

Part Number	Description	Notes
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)

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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. We will check the original parts diagram and confirm current availability.