INDUSTRY COMPONENT

Intake Filter

Air intake filter for compressors that removes contaminants from incoming air to protect internal components and ensure clean compressed air output.

Component Specifications

Definition
An air intake filter is a critical filtration component installed at the compressor's air inlet. It mechanically captures airborne particulates (dust, pollen, debris) and, in some designs, coalesces moisture and oil aerosols. Its primary function is to prevent abrasive and corrosive contaminants from entering the compression chamber, thereby protecting valves, cylinders, rotors, and downstream equipment from wear, corrosion, and fouling, while maintaining air quality standards.
Working Principle
Operates on mechanical filtration and inertial separation principles. As air is drawn into the compressor, it passes through a porous filter media (e.g., pleated paper, synthetic fiber, or cellulose). Particulates larger than the media's pore size are trapped on the surface or within the depth of the media. In two-stage filters, a pre-filter removes larger particles, and a secondary fine filter or coalescing element captures sub-micron particles and liquid aerosols. The clean air then proceeds to the compression stage.
Materials
Filter Media: Pleated cellulose, synthetic fibers (polyester, glass fiber), or nanofiber coatings. Housing: Typically aluminum, galvanized steel, or engineered plastics (e.g., polycarbonate) for corrosion resistance. Seals: Nitrile rubber (NBR) or silicone gaskets for airtight sealing. Support Structures: Wire mesh or plastic grids to maintain media integrity under pressure differentials.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Filter ClassISO 8573-1:2010 Class 1-4 for particulates
Nominal Flow RateMatches compressor CFM/m³/min rating (e.g., 10-5000 CFM)
Temperature Range-20°C to +80°C (-4°F to 176°F)
Dust Holding Capacity200-1000 grams depending on media and size
Filtration Efficiency≥99.9% at 3-5 microns (standard), up to 99.99% at 0.01 microns (HEPA-grade for specific industries)
Initial Pressure Drop≤2.5 mbar (0.036 psi) at rated flow
Maximum Operating Pressure10-16 bar (145-232 psi) for standard industrial compressors

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 8573-1:2010, ISO 12500-1:2007, DIN 3188, ANSI/ASHRAE 52.2

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Increased energy consumption due to pressure drop
  • Reduced compressor efficiency and airflow
  • Contaminant ingress causing internal abrasion and corrosion
  • Oil contamination in downstream air lines
  • System overheating and potential thermal shutdown
  • Filter media rupture under excessive differential pressure
FMEA Triads
Trigger: Filter media clogged with particulates beyond capacity
Failure: Excessive pressure drop, reduced airflow, compressor overload
Mitigation: Implement scheduled maintenance based on pressure differential monitoring; use pre-filters in high-dust environments; select filters with higher dust holding capacity.
Trigger: Improper installation or damaged sealing gasket
Failure: Unfiltered air bypass, contaminant ingress, reduced filtration efficiency
Mitigation: Follow manufacturer torque specs during installation; inspect gaskets during replacement; use OEM or certified compatible parts.
Trigger: Exposure to moisture or oil aerosols without adequate coalescing
Failure: Media saturation, bacterial growth, structural collapse, increased pressure drop
Mitigation: Use filters with hydrophobic/oleophobic media or integrated coalescers; install aftercoolers and moisture separators upstream; ensure proper compressor oil management.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Filter housing must maintain seal integrity with ≤0.1% air bypass at maximum operating pressure. Filtration efficiency must meet specified ISO 8573-1 class with ±2% tolerance in tested conditions.
Test Method
Performance tested per ISO 12500-1 for pressure drop and ISO 8573-1 for particulate removal efficiency using particle counters and differential pressure gauges under standard conditions (20°C, 1 atm, 50% RH).

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Intake Filter

3 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Eawayfilter
Hunan, CN
Also makes: Fan Filter Unit (FFU), Filter Unit, HEPA Filter and 2 more
Listed on the company's own website · profile compiled by CNFX from public sources
Nanjing Blue Sky Filter Co.,Ltd.
Nanjing, Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Shijiazhuang Yitong Filter Machinery Co., Ltd.
Shijiazhuang, Hebei, CN
Also makes: Filtration Chamber, HEPA Filter, Pre-Filter and 1 more
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

How often should an air compressor intake filter be replaced?

Replacement intervals depend on operating environment air quality and compressor usage. Typically, inspect every 500-1000 operating hours and replace when pressure drop exceeds 6-7 mbar (0.087-0.1 psi) above initial drop or as per manufacturer's recommendation (often 2000-8000 hours). In dusty environments, replace more frequently.

What happens if the intake filter is clogged?

A clogged filter increases pressure drop, forcing the compressor to work harder to draw air, leading to reduced airflow (CFM), higher energy consumption, overheating, potential oil carryover, and accelerated wear on components. Severe clogging can cause compressor shutdown or failure.

Can intake filters be cleaned and reused?

Most industrial intake filters are disposable and not designed for cleaning, as washing can damage the media structure and reduce efficiency. Some heavy-duty models feature cleanable pre-filters or synthetic media that can be gently vacuumed or blown out with low-pressure air, but always consult the manufacturer's guidelines.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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