Ingersoll Rand ATN72018 Air Filter Element | 720kW Centrifugal Compressor

Product Overview

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

As a core consumable in the centrifugal compressor intake filtration system, the 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 centrifugal compressor stations reduce energy consumption and unplanned downtime.

Technical Specifications

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 and 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 strict intake cleanliness requirements of 720kW centrifugal compressors.

Flow and Pressure Drop

• Rated flow: 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: 350–600 Pa
• Alarm / terminal resistance: alarm at 700 Pa; terminal at 800 Pa (replace immediately)
• Energy relationship: every 100 Pa increase in intake pressure loss raises compressor shaft power by approx. 0.35%

The ATN72018 delivers approximately 40% lower clean pressure drop and 89% higher dust-holding capacity than comparable alternatives, reducing energy consumption and extending replacement intervals in high-flow applications.

Dimensions and Installation

• Dimensions: approx. φ600 × φ310 × 600 mm (OD × ID × height)
• Effective filtration area: approx. 25–30 m² (pleated cartridge)
• Pleats: approx. 300–350 pleats, pitch approx. 6–7 mm
• Connection: flange or end-cap groove, mates with large intake filter housing
• Sealing: polyurethane (PU) foam gasket integrated into the end frame for zero-leak fit

Materials of Construction

• Media: micro-fiberglass
• Media weight: approx. 120–150 g/m²
• Support: internal galvanized metal mesh + external protective mesh
• End caps: polystyrene frame, lightweight, corrosion-resistant, incinerable
• Seal: one-piece polyurethane (PU) foam gasket
• Adhesive: polyurethane bonding, high-temperature resistant

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
• Features: high flow, low resistance, high dust-holding capacity, extended service life, zero-leak sealing

Service Life and Standards

• Service life: approx. 4,000–6,000 hours (8–10 months) under standard conditions; approx. 3,000 hours in high-dust environments
• Shelf life: 36 months in sealed original packaging, dry ambient conditions
• Standards: ISO 5011, ISO 16889, ISO 16890 / EN 779, ISO 29463, GB/T 14295, GB/T 6165

Maintenance and Installation

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 LOTO, confirm the unit has fully stopped and depressurized.
2. Open filter housing: release latches or bolts on the intake filter housing and remove the cover or access door.
3. Remove old element: pull the old ATN72018 element straight up; check for any gasket residue in the housing groove.
4. Clean housing interior: wipe the inner wall and sealing surface with a clean cloth; ensure no dust, oil, or foreign matter.
5. Inspect new element: verify part number ATN72018; check media for damage, pleats for deformation, gasket for aging.
6. Install new element: place vertically into the housing center; ensure the gasket seats evenly without skew or twist.
7. Reassemble housing: refit cover or access door and tighten bolts or latches evenly for a gap-free seal.
8. Start up and leak-check: run the compressor, listen for air leaks at the filter, and confirm the differential pressure gauge returns to normal (initial drop 250–350 Pa).

Frequently Asked Questions

Q1: Which Ingersoll Rand compressors does ATN72018 fit?
A: It is designed for Ingersoll Rand ATN-series 720kW oil-free centrifugal compressors. If unsure, provide your compressor serial number for precise matching.

Q2: How is ATN72018 different from a standard screw compressor filter?
A: Centrifugal compressors require much higher intake cleanliness and flow. ATN72018 uses micro-fiberglass media (99.9% @ 3.0 μm) with a per-element flow of 50–80 Nm³/min, versus F5 (98% @ 5 μm) and only a few to tens of Nm³/min for screw filters. Using a standard filter can cause impeller fouling, dynamic imbalance, and costly impeller damage.

Q3: How do I know when to replace the filter?
A: Replace when: ① operating differential reaches the 700 Pa alarm; ② the 4,000–6,000 hour or 8–10 month interval is reached; ③ visual inspection shows media damage or gasket aging/deformation.

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

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

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)
• ATN18504 — Air filter element, ATN-series centrifugal compressor (185kW 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 data above is based on Ingersoll Rand official centrifugal compressor filtration specifications and industrial filter standards. For 100% accurate matching, provide the complete compressor serial number so we can confirm the original parts diagram and current supply.