Ingersoll Rand ATN18504 Air Filter Element | 185kW Centrifugal Compressor

Product Overview

The ATN18504 air filter element is a genuine Ingersoll Rand intake filter element engineered for ATN-series 185kW oil-free centrifugal compressors. Using micro-fiberglass media, it captures 99.5% of particles at 3.0 μm, blocking dust and particulate from entering the compression chamber and protecting high-speed precision impellers and diffusers from erosion.

As a core service part of the Ingersoll Rand centrifugal compressor intake filtration system, the 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 unplanned downtime.

Key Specifications

• 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: Normally stocked

Filtration Performance

• Filtration Rating: 3.0 μm
• 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 to final resistance
• Beta Ratio: β₃.₀ ≥ 200

The micro-fiberglass media in the ATN18504 delivers 99.5% efficiency at 3.0 μm, significantly higher than standard screw compressor air filters (F5, 98% @ 5 μm). This meets the stringent intake cleanliness requirements of centrifugal compressors and protects the precision impellers and diffusers of 185kW units.

Flow and Pressure Drop

• 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 Range: 300–550 Pa
• Alarm / Final Resistance: alarm at 650 Pa; final resistance 800 Pa (replace immediately)
• Pressure Drop vs. Energy: every 100 Pa increase in intake pressure loss raises compressor shaft power by approx. 0.35%

The Ingersoll Rand centrifugal compressor intake filter is designed with micro-fiberglass media. Its clean pressure drop is approximately 40% lower than comparable competitors, and dust-holding capacity is approximately 89% higher, reducing energy consumption and extending replacement intervals.

Dimensions and Installation

• Dimensions: approx. φ420 × φ220 × 380 mm (outer diameter × inner diameter × height)
• Effective Filtration Area: approx. 12–15 m² (pleated cartridge expanded area)
• Pleats / Pleat Spacing: approx. 200–240 pleats, spacing approx. 6–8 mm
• Mounting Interface: flange or end-cap slot type, mates with intake filter housing
• Sealing: polyurethane (PU) foam gasket integrated into the media end frame for seamless, zero-leak fit

Material Construction

• Media: micro-fiberglass
• Media Weight: approx. 120–150 g/m²
• Inner/Outer Support: galvanized metal support mesh inside, protective mesh outside, prevents media collapse
• End Caps: polystyrene frame, lightweight, corrosion-resistant, incinerable
• Seal: polyurethane (PU) integrally foamed gasket, high elasticity, seamless fit
• Adhesive: polyurethane bonding of end caps to media, high-temperature resistant, no debonding

Operating Tolerance

• Operating Temperature: continuous -20°C to 80°C; maximum 93°C (200°F)
• Relative Humidity: ≤95% RH, non-condensing
• Collapse Pressure: overall collapse differential ≥ 2.8 kPa
• Features: low initial pressure drop, high dust-holding capacity, long replacement interval, zero-leak seal

Service Life and Maintenance

• 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

Compliance and Standards

• ISO 5011 — intake filter performance testing for internal combustion engines and compressors (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

1. Shut down and lock out: disconnect main power, apply lockout/tagout (LOTO), confirm the unit has fully stopped and is 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 whether the seal ring remains 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, or seal aging.
6. Install the new element: place vertically into the housing center; ensure the seal ring seats evenly against the sealing surface without skew or twist.
7. Reassemble the housing: refit the cover; 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 confirm the differential pressure gauge returns to normal (initial drop should be 220–300 Pa).

Frequently Asked Questions

Q1: Which Ingersoll Rand compressors does the ATN18504 fit?
A: 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 the ATN18504 different from a standard screw compressor air filter?
A: Centrifugal compressors require much higher intake cleanliness than screw compressors. The ATN18504 uses micro-fiberglass high-efficiency media (99.5% @ 3.0 μm), whereas standard screw compressor filters are only F5 (98% @ 5 μm). Using a standard filter can cause impeller fouling, dynamic balance disruption, and even costly impeller 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 seal aging/deformation.

Q4: Is the ATN18504 a genuine OEM part?
A: The ATN18504 is a genuine Ingersoll Rand part manufactured to Ingersoll Rand global technical standards, compatible with original Ingersoll Rand intake filter housings.

Q5: Is one filter element enough?
A: Centrifugal compressor intake filters may use single or multiple elements. The exact configuration depends on the intake filter assembly specification. Please provide the compressor serial number for confirmation.

Related Parts

• ATS11057 — Air filter element for ATS-series centrifugal compressors (110kW class)
• ATN09504 — Air filter element for ATN-series centrifugal compressors (95kW class)
• ATN10504 — Air filter element for ATN-series centrifugal compressors (105kW class)
• ATN72018 — Air filter element for large ATN-series centrifugal compressors (720kW class)
• A29504376 — Pre-filter element for oil-free screw compressors
• A29504406 — Main filter element for oil-free screw compressors (H11 class)
• A11516974 — Panel filter element for medium centrifugal compressors
• A13368674 — Panel filter element for large centrifugal compressors

Note: The technical parameters above are compiled from 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 OEM parts diagram and confirm current supply. Contact us for a quotation, datasheet, or sample.