Ingersoll Rand ATN18504 Air Filter Element

ATN18504 is a genuine Ingersoll Rand intake air filter element engineered for ATN-series 185kW oil-free centrifugal compressors. Built with micro-fiberglass media, it captures 99.5% of particles at 3.0 μm, blocking dust and particulate matter from entering the compression chamber — protecting high-speed precision impellers and diffusers from erosion and maintaining ISO 8573-1 Class 0 oil-free air quality.

As a core consumable in the Ingersoll Rand centrifugal compressor intake filtration system, the ATN18504 is manufactured to Ingersoll Rand global technical standards. Low initial pressure drop, high dust-holding capacity, and extended service life help 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: In regular supply

Technical Data

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 airflow, terminal resistance)
• Beta ratio: β₃.₀ ≥ 200

The micro-fiberglass media achieves 99.5% efficiency at 3.0 μm — significantly higher than standard screw compressor air filters (F5, 98% @ 5μm) — meeting the strict intake cleanliness demands of centrifugal compressors and protecting the precision impellers and diffusers of 185kW units.

Flow & Resistance

• Rated airflow: Approx. 25–40 Nm³/min (for 185kW-class centrifugal units)
• Initial pressure drop: Approx. 220–300 Pa (clean, at rated airflow)
• Operating differential range: 300–550 Pa
• Alarm / terminal resistance: Alarm at 650 Pa; terminal at 800 Pa (mandatory replacement)
• 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 design delivers approximately 40% lower clean pressure drop and 89% higher dust-holding capacity than comparable alternatives, reducing energy consumption and extending replacement intervals.

Dimensions & Installation

• Dimensions: Approx. φ420 × φ220 × 380 mm (OD × ID × height)
• Effective filtration area: Approx. 12–15 m² (pleated media)
• Pleats: Approx. 200–240 pleats, 6–8 mm pitch
• Mounting: Flange / end-cap groove interface, mates with intake filter housing
• Sealing: Polyurethane (PU) foam gasket integrated into the end frame for seamless, zero-leak fit

Construction Materials

• 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: One-piece polyurethane (PU) foam seal, high elasticity, seamless fit
• Bonding: Polyurethane adhesive bonds end caps to media; heat-resistant, no debonding

Operating Conditions

• 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
• Features: Low initial pressure drop, high dust-holding capacity, long replacement interval, zero-leak seal

Service Life & Storage

• 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, ambient dry conditions

Standards

• ISO 5011: Inlet air cleaning equipment for internal combustion engines and compressors — performance testing
• ISO 16889: Hydraulic fluid power filters — multi-pass method for evaluating filtration performance
• ISO 16890 / EN 779: Air filters for general ventilation — classification
• ISO 29463: High-efficiency filters for removing particles from air
• GB/T 14295: Air filters
• GB/T 6165: Methods for testing air filter performance (efficiency and resistance)

Maintenance & 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: Switch off main power, apply lockout/tagout (LOTO), confirm the unit has fully stopped and depressurized.
2. Open the filter housing: Release housing latches or bolts; remove the cover or access door.
3. Remove old element: Pull the old ATN18504 straight up; check whether the gasket remains in the housing groove.
4. Clean the housing interior: Wipe the inner walls and sealing surface with a clean cloth — no dust, oil, or debris.
5. Inspect new element: Verify part number ATN18504; check media for damage, pleat deformation, and gasket aging.
6. Install new element: Place vertically into the housing center; ensure the gasket seats evenly on the sealing surface without skew or twist.
7. Reassemble housing: Refit the cover, tighten bolts or latches 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 differential pressure reads normal (initial drop should be 220–300 Pa).

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: How is ATN18504 different from a standard screw compressor air filter?

A: Centrifugal compressors demand far 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 (98% @ 5μm). Using a standard filter can cause dust buildup on centrifugal compressor impellers, disrupt dynamic balance, and even lead to costly impeller wear and scrapping.

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

A: Replace under any of three conditions: (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 reveals media damage or gasket aging/deformation.

Q4: Is ATN18504 a genuine OEM part?

A: ATN18504 is a genuine Ingersoll Rand OEM replacement part, manufactured to Ingersoll Rand global technical standards and compatible with Ingersoll Rand original intake filter housings.

Q5: Is one filter element enough?

A: Centrifugal compressor intake filter assemblies may use single or multiple elements. The exact quantity depends on the intake filter assembly specification — provide the serial number for confirmation.

Related Part Numbers

• ATS11057 — Air filter element, ATS-series centrifugal compressor (110kW class)
• ATN09504 — Air filter element, ATN-series centrifugal compressor (95kW class)
• ATN10504 — Air filter element, ATN-series centrifugal compressor (105kW class)
• ATN72018 — Air filter element, ATN-series large centrifugal compressor (720kW class)
• A29504376 — Pre-filter element, oil-free screw compressor
• A29504406 — Main filter element, oil-free screw compressor (H11 class)
• A11516974 — Filter element, medium centrifugal compressor (panel type)
• A13368674 — Filter element, large centrifugal compressor (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, provide the full compressor serial number and we will check the original parts diagram and confirm the latest supply information.