Ingersoll Rand ATN72018 Air Filter Element | ATN Series 720kW Centrifugal Compressor

Product Overview

The ATN72018 air filter element is a genuine Ingersoll Rand intake filter designed for ATN series 720kW high-capacity oil-free centrifugal compressors. Manufactured with micro-fiberglass media, it achieves over 99.9% filtration efficiency for particles 3.0 μm and larger, effectively blocking dust and particulate matter from entering the compression chamber. This protects high-speed precision impellers and diffusers from erosion and maintains stable ISO 8573-1 Class 0 oil-free air quality.

As a core spare part in the Ingersoll Rand centrifugal compressor intake filtration system, the ATN72018 is produced to global unified technical standards. It offers high airflow with low resistance, high dust holding capacity, and extended service life, helping large centrifugal compressor stations reduce energy consumption and unplanned downtime.

Key Specifications

Filtration Performance

• Filtration rating: 3.0 μm
• Filtration efficiency: 99.9% @ 3.0 μm
• Filter class: F8 (medium-high efficiency, per EN 779 / ISO 16890)
• Dust holding capacity: approx. 7.2 kg at rated airflow and final resistance
• Beta ratio: β₃.₀ ≥ 1000

The micro-fiberglass construction delivers 99.9% efficiency at 3.0 μm, significantly outperforming standard screw compressor filters (F5 class, 98% @ 5μm). This meets the stringent intake cleanliness requirements of large centrifugal compressors and protects the precision impellers and diffusers of 720kW units.

Flow and Pressure Drop

• Rated flow capacity: approx. 50–80 Nm³/min per element (for 720kW class centrifugal units)
• Initial pressure drop: approx. 250–350 Pa (clean, at rated flow)
• Operating differential pressure: 350–600 Pa
• Alarm / final resistance: Alarm at 700 Pa; final resistance at 800 Pa (mandatory replacement)
• Pressure drop vs. energy: Every 100 Pa increase in inlet pressure loss raises compressor shaft power by approx. 0.35%

The Ingersoll Rand centrifugal intake filter uses micro-fiberglass media with approximately 40% lower clean pressure drop and 89% higher dust holding capacity than comparable alternatives, reducing energy consumption and extending replacement intervals in high-airflow applications.

Dimensions and Installation

• Dimensions: approx. φ600 × φ310 × 600 mm (outer diameter × inner diameter × height)
• Effective filtration area: approx. 25–30 m² (pleated cartridge expanded area)
• Pleats / pleat spacing: approx. 300–350 pleats, approx. 6–7 mm spacing
• Installation interface: Flange or end-cap groove type, mates with large intake filter housing
• Sealing: Polyurethane (PU) foam gasket integrated into the end frame for seamless zero-leak fit

Materials of Construction

• Media: Micro-fiberglass
• Media weight: approx. 120–150 g/m²
• Support: Inner galvanized metal support mesh + outer protective mesh to prevent media collapse
• End caps: Polystyrene frame — lightweight, corrosion-resistant, incinerable
• Seal: Polyurethane (PU) integrally foamed gasket, high elasticity, seamless fit
• Adhesive: Polyurethane bonding end caps to media, high-temperature resistant, no debonding

Operating Conditions

• Operating temperature: Continuous: -20°C to 80°C; maximum: 93°C (200°F)
• Relative humidity: ≤95% RH, no condensation
• Collapse pressure resistance: ≥ 2.8 kPa overall
• Features: High airflow with low resistance, high dust holding capacity, extended service interval, zero-leak sealing

Service Life and Storage

• Service life: Approx. 4,000–6,000 hours (8–10 months) under standard conditions; reduced to 3,000 hours in high-dust environments
• Shelf life: 36 months in original sealed packaging, stored in a dry environment at room temperature

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 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: Methods for performance testing of air filters (efficiency and resistance)

Maintenance and Installation

Replacement Schedule

• Standard conditions: every 4,000–6,000 hours or 8–10 months, whichever comes first
• High-dust conditions (mining, building materials, cement, steel, etc.): every 3,000 hours
• Replace immediately when differential pressure alarm triggers (≥700 Pa)

Installation Steps

1. Shut down and isolate power: Turn off the main compressor power, apply lockout/tagout (LOTO), confirm the unit has fully stopped and is depressurized.
2. Open the intake filter housing: Release the latches or bolts on the large intake filter housing and remove the cover or access door.
3. Remove the old element: Pull the old ATN72018 element vertically upward and check whether the gasket remains in the housing groove.
4. Clean the housing interior: Wipe the inner walls and sealing surfaces with a clean cloth to ensure no dust, oil, or foreign objects remain.
5. Inspect the new element: Verify the part number ATN72018, check the media for damage, pleat deformation, and gasket aging.
6. Install the new element: Place the new element vertically into the center of the housing, ensuring the gasket seats evenly on the sealing surface without skew or twist.
7. Reassemble the housing: Reinstall the cover or access door and tighten bolts or latches evenly to ensure a gap-free seal.
8. Start and leak-check: Start the compressor, listen for air leaks at the intake filter, and check that the differential pressure gauge reads normal (initial pressure drop should be 250–350 Pa).

Frequently Asked Questions

Q1: Which Ingersoll Rand compressors does the ATN72018 fit?

A: The ATN72018 is designed for Ingersoll Rand ATN series 720kW high-capacity 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 the ATN72018 different from a standard screw compressor air filter?

A: Centrifugal compressors require much higher intake cleanliness and airflow than screw compressors. The ATN72018 uses micro-fiberglass high-efficiency media (99.9% @ 3.0μm) and handles 50–80 Nm³/min per element, whereas standard screw compressor filters are only F5 class (98% @ 5μm) with much lower flow capacity. Using a standard filter can cause dust accumulation on the impeller, dynamic imbalance, and even costly impeller damage.

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

A: Replacement is required in three cases: ① operating differential pressure reaches the alarm value of 700 Pa; ② the 4,000–6,000 hour or 8–10 month service interval is reached; ③ visual inspection reveals media damage or gasket aging/deformation.

Q4: Is the ATN72018 a genuine OEM part?

A: The ATN72018 is a genuine Ingersoll Rand spare part, manufactured to Ingersoll Rand global technical standards and designed to fit original intake filter housings.

Q5: Is one filter element enough?

A: 720kW large centrifugal compressors typically use multiple filter elements in parallel. The exact quantity depends on the intake filter assembly specification. Please provide the compressor serial number to confirm the required quantity.

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Note: Technical parameters 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 availability.