Product
Ingersoll Rand 47722477001 Air Filter Element | Centrifugal Compressor Intake
Replacement intake air filter element for Ingersoll Rand MSG TURBO-AIR and MSG Centac centrifugal compressors. Part number 47722477001, 5–10 μm filtration, ≥98% efficiency, cellulose media. Verify by part number before ordering.
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Product Overview
47722477001 is the intake air filter element for Ingersoll Rand centrifugal air compressors. It installs inside the intake filter assembly, upstream of the centrifugal impeller inlet. As the first barrier in the air path, it captures dust, sand and fibres before they reach the impeller and intercoolers — critical on a 100% oil-free machine (ISO 8573-1 Class 0), where no lubricant carries contaminants away and deposits on the high-speed impeller can shift rotor balance.
This part belongs to the Ingersoll Rand centrifugal (CC) product line. Item-level model code: P675; unit group identifier: C675.
| Item | Value |
|---|---|
| Part number | 47722477001 |
| Description | Air Filter Element |
| Brand | Ingersoll Rand |
| Application | Ingersoll Rand centrifugal compressors (MSG TURBO-AIR / MSG Centac series) and packaged systems |
| Product line | Centrifugal (CC) |
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% (for particles ≥5 μm) |
| Recommended change interval | 2,000 hours or 3 months |
Technical Parameters
Filtration Performance
| Parameter | Value / Note |
|---|---|
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% (particles ≥5 μm) |
| Filter class | Characterised per ISO 5011 by efficiency, resistance and dust holding capacity; HVAC classes (G4/F7) do not apply |
Flow and Pressure Drop
| Parameter | Value / Note |
|---|---|
| Rated air flow | Must exceed unit rated intake flow; match after correcting for discharge flow, intake temperature and altitude |
| Initial pressure drop | Approx. 0.3–0.5 kPa (clean element) |
| Operating differential | Rises with dust loading; typical range approx. 0.5–1.5 kPa |
| Alarm / final resistance | Typical change threshold approx. 1.5–2.5 kPa; on centrifugal units the intake depression gauge reading is the final criterion |
| Pressure drop vs. energy | Each 1 kPa increase in intake resistance raises compression ratio by about 1%, increasing unit energy consumption by about 1.0% |
Dimensions and Installation
| Parameter | Value / Note |
|---|---|
| Overall dimensions | — (measure the original part) |
| Effective filtration area | — (measure the original part) |
| Pleat count / pitch | — (measure the original part) |
| Mounting interface | Matches the intake filter assembly; verify against the old element |
| Sealing type | Face or radial seal; verify against the old element |
Measure these before ordering: outer diameter, inner diameter, overall height (including end caps), seal position and profile, and mounting interface type. Length, diameter and seal form determine fit and whether bypass occurs — do not substitute a unit model number for actual measurement.
Materials
| Parameter | Value / Note |
|---|---|
| Filter media | Wood-pulp cellulose filter paper, pleated construction |
| Media weight | Approx. 130 g/m² |
| Inner / outer support | Galvanised perforated steel, supporting the media on both sides |
| End caps | Metal or polyurethane, bonded to the media |
| Seal | Polyurethane or NBR, integral with or separate from the end cap |
| Bonding | Polyurethane adhesive for media-to-cap and edge sealing |
Operating Conditions
| Parameter | Value / Note |
|---|---|
| Operating temperature | -10 °C to +80 °C |
| Relative humidity | ≤90% RH (non-condensing) |
| Collapse resistance | Designed to withstand at least 5 kPa differential without deformation |
Service Life and Storage
| Parameter | Value / Note |
|---|---|
| Service life | 2,000 hours or 3 months, whichever comes first |
| High-dust environments | Shorten hours accordingly (e.g. approx. 1,500 hours) and bring the time limit forward |
| Storage life | Use within 24 months; store dry, ventilated and out of direct light, protected from moisture and crushing |
| Replacement criteria | Intake depression gauge reading exceeds limit, or media damage, de-bonding or flattened seal |
Applicable Standards
| Standard | Note |
|---|---|
| ISO 5011 | Test method for intake filter efficiency and dust holding capacity — the performance basis for this air filter element |
| ISO 8573-1 | Compressed air quality classes; the host units are Class 0 (100% oil-free) |
| Note | ISO 2941 / 2942 / 2943 / 3723 / 3724 are hydraulic filter standards and do not apply to air filter elements; do not use them as performance evidence for intake filters |
Installation and Maintenance Steps
- Confirm unit status and spare part. Check the unit nameplate model and group identifier, and confirm the new element matches the old part number. Have the new element, clean cloths and tools ready.
- Shut down, depressurise, isolate. Follow the shutdown procedure and wait until the unit is fully depressurised — centrifugal units have rotational inertia, so wait for the controller to confirm zero speed. Switch off the main power and apply lockout/tagout. This step is mandatory.
- Verify the old element before dismantling. Read the stamped part number and installation position on the old element's end cap and confirm it matches the new part. Intake and clean-side elements carry different part numbers — this step prevents mis-selection.
- Remove and inspect the old element. Lift it out vertically and check dust distribution and media condition. Replace immediately if the media is torn, perforated, de-bonded or the seal is flattened — even before the interval is due. Black oily sludge on the surface indicates abnormal oil mist in the intake and calls for upstream investigation.
- Clean the assembly interior. Wipe the inner walls and base with a lint-free cloth. Do not blow compressed air into the assembly — it drives dust into the intake path.
- Fit the new element. Install in the same orientation and position as the old part, paying attention to seal face direction and clamping. The element should not move once seated, and the seal should be evenly compressed around its circumference.
- Refit and confirm sealing. Replace the cover or clamp and tighten evenly as specified. Check that the intake depression gauge line is clear — a blocked line gives a false "clean" reading and is a common source of misjudgement.
- Reset, test run, record. Reset the service timer, start the unit unloaded and observe the depression gauge and running sound. The gauge should sit within the permitted range with no abnormal whistling, which usually indicates seal bypass. Record the unit running hours as the start of the next interval.
FAQ
Q1: Which units use 47722477001?
Ingersoll Rand centrifugal air compressors — MSG TURBO-AIR and MSG Centac series and packaged systems (item-level model code P675, unit group identifier C675). These are 100% oil-free designs. For a specific unit, confirm against the nameplate and the old part number.
Q2: Can it be used on an oil-flooded screw compressor?
Not recommended. This element belongs to the centrifugal product line and its dimensions and interface suit centrifugal intake assemblies. Oil-flooded screw compressors use a separate part number system, and mixing them cannot guarantee sealing or filtration.
Q3: What is the change interval?
Standard interval is 2,000 hours or 3 months, whichever comes first. In high-dust environments (cement, quarrying, mining, metalworking) shorten to about 1,500 hours. The intake depression gauge reading is the final criterion — replace when it exceeds the limit, regardless of running hours.
Q4: Why is intake filtration more critical on centrifugal machines than screw machines?
Centrifugal machines are oil-free, so no lubricant film carries contaminants away; particles deposit on the high-speed impeller and intercoolers. Deposits on the impeller shift dynamic balance and require a shutdown for rotor correction. Oil-flooded screw machines tolerate more intake contamination because an oil film removes some particles.
Q5: Why are dimensions not listed?
Centrifugal units are supplied as project packages, and intake assembly dimensions differ between groups and package scopes within the same series. Publishing a single size would mislead buyers. Measure the old element's outer diameter, inner diameter, overall height and seal type, or send photos of the old part and the unit nameplate so we can cross-check by part number.
Q6: What happens when intake resistance rises?
Energy consumption increases — each 1 kPa of additional intake resistance raises the compression ratio by about 1% and unit energy use by about 1% — and intake volume falls, reducing discharge flow. Running past the change threshold costs more in electricity than the filter element itself.
Q7: Can an alternative element be used?
Yes, but verify three points: filtration rating, end-cap seal type and dimensions. An alternative with a different seal form can bypass — on an oil-free centrifugal machine that means particles reach the impeller directly, a higher risk than on an oil-flooded unit. Provide old-part photos and this part number when sourcing alternatives.
Q8: What should I do if there is abnormal whistling after installation?
Whistling usually indicates seal bypass — the element is not fully seated, the seal face is deformed, or the seal is missing. Stop the unit and recheck seating and seal condition. Also check that the intake depression gauge line is not blocked to avoid misdiagnosis.
Q9: How should spares be stored?
Store dry, ventilated and out of direct light, protected from moisture, rain and heavy loads. Moisture reduces media strength and compression deforms the sealing fit. Use within 24 months.
Q10: Which filters in the same series are easily confused?
On the Ingersoll Rand centrifugal line, one unit often carries both an intake filter and a downstream clean-side filter with different part numbers and positions. Confirm whether you need the intake or clean-side element before ordering — filtration rating, materials and seal type differ between the two.
Compatible Units
| Item | Detail |
|---|---|
| Machine type | Centrifugal air compressor |
| Product line | Ingersoll Rand centrifugal (CC) |
| Series | MSG TURBO-AIR / MSG Centac |
| Item-level model code | P675 |
| Unit group identifier | C675 |
| Air quality class | 100% oil-free, ISO 8573-1 Class 0 |
| Typical applications | Continuous, clean, oil-free air supply — food and beverage, pharmaceutical, electronics, textiles, pneumatic conveying |
Representative model families (family-level reference; individual fitment must be verified by serial number): MSG TURBO-AIR TA / NX packaged units; MSG Centac standard pressure C series (C400, C700, C800, C1000, C3000 and others); MSG Centac high pressure C750, C1050, 2CII, 3C, 4C and similar; and downstream equipment for these units including dryers, filters and receivers.
Why select by part number, not unit model: centrifugal units are supplied as project packages, so intake assembly configuration, downstream scope and interface dimensions can vary between projects for the same unit. A single unit also carries both intake and clean-side filter elements with different part numbers. Use the old element's part number first, the unit nameplate second and the installation position third.
Three-step verification:
- Read the part number stamped on the old element's end cap or frame and compare with the ordered number.
- Read the model and group identifier on the unit nameplate and compare with the unit parts manual.
- Confirm the old element's position (intake or clean side) — the two are not interchangeable.
If verification is still inconclusive, send photos of the unit nameplate and the old element (including the stamped part number) plus the installation position, and we will cross-check by part number.
Cross-series note: centrifugal and oil-flooded screw compressor filter elements belong to different part number systems and cannot be interchanged. Screw compressor intake filters are dimensioned for external intake assemblies, and direct substitution causes seal failure.
Related Parts
| Component | Part number | Function | Inspection points |
|---|---|---|---|
| Sterile filter element | 47722478001 | Downstream sterile-grade element for further removal of micro-organisms and particles where higher air purity is required | Different filtration stage from the intake element; part numbers are not interchangeable — confirm position on replacement |
| Air filter assembly (housing) | — | Housing that holds and locates the intake element | Check clamps, seal faces and outlet for deformation or corrosion |
| Intake depression / differential gauge | — | Indicates intake resistance and is the final change-interval criterion | Check the impulse line regularly — blockage gives a false "clean" reading |
| Seals | — | Prevent bypass between element and assembly | Inspect together with the element; replace if flattened, hardened or missing |
| Unit lubricant and oil filter | — | For the gearbox and bearing lubrication system (not the compression chamber) | Change per the unit parts manual and inspect alongside the intake element |
Paired replacement advice: inspect the intake element, downstream clean-side element and seals together, but decide each on its own criteria. The intake and clean-side elements have different intervals — the downstream element is normally judged by air purity requirements rather than dust loading — so they need not be changed on the same schedule.
For specific part numbers marked "—", refer to the unit's own parts manual. Centrifugal units are supplied as project packages, and the accessory part numbers listed in the manual correspond to the serial numbers of the units in that project; do not apply them across projects.
To confirm fitment or request a quotation, send the unit nameplate details, the old element's stamped part number and a photo of the installation position. We support part-number-verified supply for importers, distributors and maintenance contractors.