Ingersoll Rand ATN72018 Air Filter Element | 720kW Centac Intake Filter

Product Overview

ATN72018 is a genuine Ingersoll Rand air filter element engineered for ATN-series 720kW oil-free centrifugal compressors. Built with micro-fiberglass media, it delivers over 99.9% filtration efficiency at 3.0 μm, blocking dust and particulate matter from entering the compression chamber to protect high-speed impellers and diffusers. This supports stable delivery of ISO 8573-1 Class 0 oil-free air quality.

As a core consumable in the centrifugal compressor intake system, ATN72018 is manufactured to Ingersoll Rand global technical standards. It combines high flow capacity, low resistance, high dust holding capacity, and long service life to help large compressor stations reduce energy consumption and unplanned downtime.

Key Specifications

• Part Number: ATN72018
• Brand: Ingersoll Rand
• Component: Air Filter Element
• Product Line: CC (Centrifugal Compressor)
• Compatible Models: ATN-series oil-free centrifugal compressors (720kW class)
• Unit of Measure: EA (each)
• Availability: Normally supplied

Filtration Performance

• Filtration Rating: 3.0 μm
• 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 flow, terminal resistance)
• Beta Ratio: β₃.₀ ≥ 1000

The micro-fiberglass media achieves 99.9% efficiency at 3.0 μm, significantly higher than standard screw compressor filters (F5, 98% @ 5 μm), meeting the stringent intake cleanliness requirements of high-power centrifugal compressors.

Flow and Pressure Parameters

• Rated Air Flow: Approx. 50–80 Nm³/min (per element, for 720kW centrifugal units)
• Initial Pressure Drop: Approx. 250–350 Pa (clean, rated flow)
• Operating Differential: 350–600 Pa
• Alarm / Terminal Resistance: Alarm at 700 Pa; terminal at 800 Pa (must replace)
• Pressure Drop vs. Energy: Every 100 Pa increase in inlet pressure loss raises compressor shaft power by approx. 0.35%

The filter design delivers approximately 40% lower clean pressure drop and 89% higher dust holding capacity compared to competing products, reducing energy consumption and extending replacement intervals in high-flow applications.

Construction and Dimensions

• Dimensions: Approx. φ600 × φ310 × 600 mm (outer diameter × inner diameter × height)
• Effective Filter Area: Approx. 25–30 m² (pleated cartridge unfolded area)
• Pleats / Pitch: Approx. 300–350 pleats, pitch approx. 6–7 mm
• Mounting Interface: Flange / end-cap groove type, mating with large intake filter housings
• Sealing: Polyurethane (PU) foam gasket integrated into the end frame for seamless zero-leak fit

Materials

• 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
• Gasket: Polyurethane (PU) integrally foamed gasket, high elasticity, seamless fit
• Adhesive: Polyurethane adhesive bonding end caps to media, high-temperature 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 Resistance: ≥2.8 kPa overall
• Features: High flow, low resistance, high dust holding capacity, long replacement interval, zero-leak sealing

Service Life and Maintenance

• Service Life: Approx. 4,000–6,000 hours (8–10 months) under standard conditions; 3,000 hours in high-dust environments
• Shelf Life: 36 months in sealed original packaging, dry ambient temperature

Standards

• ISO 5011 — Inlet air filters for internal combustion engines and compressors: efficiency and dust capacity
• ISO 16889 — Hydraulic filter elements: beta ratio determination
• 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 — Air filter performance test methods (efficiency and resistance)

Installation and Maintenance

Replacement Interval

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

Installation Steps

1. Shut down and lock out: Turn off main power, apply lockout/tagout (LOTO), confirm the unit is fully stopped and depressurized.
2. Open intake filter housing: Release latches or bolts on the large intake filter housing and remove the cover or access door.
3. Remove old element: Pull the old ATN72018 element straight up; check that the gasket is not left in the housing groove.
4. Clean housing interior: Wipe the housing inner walls and sealing surfaces with a clean cloth; ensure no dust, oil, or foreign objects remain.
5. Inspect new element: Verify part number ATN72018; check media for damage, pleat deformation, or gasket aging.
6. Install new element: Place the new element vertically into the housing center, ensuring the gasket seats evenly on the sealing surface without skewing or twisting.
7. Reassemble housing: Replace the cover or access door; 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 check that the differential pressure gauge returns to normal (initial drop should be 250–350 Pa).

Frequently Asked Questions

Q1: Which Ingersoll Rand compressors does ATN72018 fit?
A: ATN72018 is designed specifically for Ingersoll Rand ATN-series 720kW high-power oil-free centrifugal compressors. If you are unsure about your model, provide the compressor serial number for precise matching.

Q2: What is the difference between ATN72018 and a standard screw compressor air filter?
A: Centrifugal compressors require much higher intake cleanliness and flow capacity than screw compressors. ATN72018 uses micro-fiberglass high-efficiency media (99.9% @ 3.0 μm) with single-element flow of 50–80 Nm³/min, while standard screw compressor filters are F5 grade (98% @ 5 μm) with flow of only a few to tens of Nm³/min. Using a standard filter can cause dust accumulation 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 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 replacement interval is reached; ③ visual inspection reveals media damage or gasket aging/deformation.

Q4: Is ATN72018 a genuine original part?
A: ATN72018 is a genuine Ingersoll Rand original accessory, manufactured to Ingersoll Rand global technical standards, and fits original Ingersoll Rand intake filter housings.

Q5: Is one filter element enough?
A: 720kW large centrifugal compressors typically use multiple filter elements in parallel. The exact number depends on the intake filter assembly specification; provide the serial number to confirm the required quantity.

Related Parts

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• ATN09504 — Air filter element for ATN-series centrifugal compressors (95kW class)
• ATN10504 — Air filter element for ATN-series centrifugal compressors (105kW class)
• ATN18504 — Air filter element for ATN-series centrifugal compressors (185kW class)
• A29504376 — Pre-filter element for oil-free screw compressors
• A29504406 — Main filter element for oil-free screw compressors (H11 grade)
• A11516974 — Filter element for medium centrifugal compressors (panel type)
• A13368674 — Filter element for large centrifugal compressors (panel type)

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 the latest supply information.