Product
Ingersoll Rand 47722477001 Air Filter Element | MSG Centac / TURBO-AIR
Ingersoll Rand 47722477001 inlet air filter element for MSG TURBO-AIR and MSG Centac centrifugal compressors (part-level code P675, group C675). 5–10 μm filtration, ≥98% efficiency, cellulose pleated media, -10 to +80 °C. Recommended change at 2000 hours or 3 months.
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Product Overview
47722477001 is the inlet air filter element for Ingersoll Rand centrifugal air compressors. It mounts inside the intake filter assembly, upstream of the centrifugal impeller inlet. As the machine runs, outside air is drawn in and dust, grit and fibers are captured by the media before they reach the impeller and intercooler.
This element sits upstream of a high-speed rotating impeller. Dust buildup on the impeller causes dynamic balance drift, so intake filtration directly affects rotor stability and maintenance cost. The part belongs to the Ingersoll Rand centrifugal (CC) product line, with part-level machine code P675 and group identifier C675. Centrifugal machines are designed as 100% oil-free (ISO 8573-1 Class 0): there is no lubricating oil in the compression chamber to carry contaminants away, so particles deposit on impeller and cooler surfaces. Intake filtration requirements are therefore higher than for oil-flooded screw compressors.
Key Specifications
| Item | Value |
|---|---|
| Part Number | 47722477001 |
| Name | Air Filter Element |
| Brand | Ingersoll Rand |
| Application | Ingersoll Rand centrifugal compressors (MSG TURBO-AIR / MSG Centac series) and packaged systems |
| Part-level machine code | P675 |
| Group identifier | C675 |
| Product line | Centrifugal (CC) |
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% (for particles ≥5 μm) |
| Recommended change interval | 2000 hours or 3 months |
Technical Parameters
Filtration performance
| Parameter | Value / Notes |
|---|---|
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% (for particles ≥5 μm) |
| Filter class | Characterized per ISO 5011 by efficiency, resistance and dust holding capacity; HVAC class systems (G4/F7 etc.) do not apply |
Flow and resistance
| Parameter | Value / Notes |
|---|---|
| Rated air flow | Must exceed machine rated intake flow; select after correcting for discharge volume, intake temperature and altitude |
| Initial pressure drop | Approx. 0.3–0.5 kPa when new and clean |
| Operating differential range | 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 machines 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 machine energy consumption by about 1.0% |
Pressure drop vs. energy detail (theoretical, at 0.85 MPa discharge gauge pressure):
| Intake resistance | Compression ratio | Energy increase |
|---|---|---|
| 0 kPa (new element) | 9.39 | Baseline |
| 0.5 kPa | 9.44 | +0.5% |
| 1.0 kPa | 9.49 | +1.0% |
| 1.5 kPa | 9.53 | +1.5% |
| 2.0 kPa | 9.58 | +2.0% |
| 2.5 kPa | 9.63 | +2.5% |
From installation to the change threshold, intake resistance climbs by more than 2 kPa and machine energy consumption rises by roughly 2%. Centrifugal machines are high-power and often run continuously, so this energy gap frequently exceeds the price of the element itself. Running past the resistance limit rather than changing on condition is not economical.
Construction and materials
| Parameter | Value / Notes |
|---|---|
| Filter media | Cellulose (wood pulp fiber) pleated paper |
| Media weight | Approx. 130 g/m² |
| Inner / outer support | Galvanized steel perforated cages, supporting media on both sides |
| End caps | Metal or polyurethane end caps bonded to the media |
| Seal | Polyurethane or NBR seal, integral with or separate from the end cap |
| Bonding | Polyurethane adhesive fixing and sealing media to end caps and cages |
Operating conditions and service life
| Parameter | Value / Notes |
|---|---|
| Operating temperature | -10 °C to +80 °C |
| Relative humidity | ≤90% RH (no condensation) |
| Burst / collapse resistance | Standard design withstands at least 5 kPa differential across the media without deformation |
| Service life | 2000 hours or 3 months, whichever comes first |
| High-dust environments | Reduce hours accordingly (e.g. approx. 1500 hours) and bring the time limit forward |
| Storage shelf life | Use within 24 months; store dry, ventilated and out of direct light, protected from moisture and crushing |
| Change criteria | Intake depression gauge reading over limit, or media damage, debonding or flattened seal |
Standards
| Standard | Notes |
|---|---|
| ISO 5011 | Test method for intake filter efficiency and dust holding capacity; basis for performance characterization of this air filter type |
| ISO 8573-1 | Compressed air quality classes; these machines are Class 0 (100% oil-free) |
| Note | ISO 2941 / 2942 / 2943 / 3723 / 3724 are hydraulic filter standards covering pressure, burst and filtration characteristics. They do not apply to air filters and should not be used as air filter performance references. |
Installation and Maintenance Steps
- Confirm machine status and spare part. Check the machine nameplate model and group identifier, and confirm the new element matches the old part number. Have the new element, clean cloths and required tools ready.
- Shut down, depressurize, isolate power. Follow the shutdown procedure and wait until the machine is fully depressurized (centrifugal machines 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 part before dismantling. Before opening the intake filter assembly, read the stamped part number on the old element end cap and note its mounting position, confirming it matches the new part. Intake and clean-side elements on centrifugal machines carry different part numbers; this step is the key error check.
- Remove and inspect the old element. Lift the old element out vertically and check dust distribution and media condition. Replace immediately if the media is torn, perforated, debonded at the end cap, or the seal is flattened, even if the interval has not been reached. Black oily sludge on the outer surface indicates abnormal oil mist in the intake; investigate the upstream environment (a particular concern on oil-free machines).
- Clean the assembly interior. Wipe the inner walls and base with a lint-free cloth. Do not blow compressed air into the assembly, as this drives dust into the intake duct. The inner walls should be free of loose dust and the sealing face flat and clear of debris.
- Install the new element. Fit the new element in the same orientation and position as the old one, paying attention to seal face direction and clamping method. The element should sit without movement 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 impulse line is clear; a blocked line gives a falsely clean reading and is a common source of misjudgment.
- Reset, test run, record. Reset the service timer, start the machine unloaded and observe the intake depression gauge and running sound. The gauge should be stable within the permitted range with no abnormal whistling (whistling usually indicates seal bypass). Record the machine running hours at this change as the start of the next interval.
FAQ
Q1: Which machines use 47722477001?
It is used on Ingersoll Rand centrifugal air compressors (MSG TURBO-AIR and MSG Centac series and their packaged systems), part-level machine code P675, group identifier C675. Centrifugal machines are 100% oil-free by design. For a specific machine, confirm against the nameplate and the old part number.
Q2: Can it be fitted to an oil-flooded screw compressor?
Not recommended. This element belongs to the centrifugal product line, with dimensions and connections designed for centrifugal intake assemblies. Oil-flooded screw compressors use a different part number system, and cross-use cannot guarantee sealing or filtration performance.
Q3: What is the change interval?
The standard interval is 2000 hours or 3 months, whichever comes first. In high-dust environments (cement, quarrying, mining, metalworking) reduce to approximately 1500 hours. The intake depression gauge reading is the final criterion: change when the reading exceeds the limit, regardless of running hours.
Q4: Why do centrifugal machines demand more from intake filtration than screw machines?
Centrifugal machines are oil-free, so there is no lubricating oil to carry contaminants away and particles deposit on the high-speed impeller and intercooler surfaces. Impeller fouling causes dynamic balance drift, which requires shutdown and rotor correction. Screw machines have an oil film that can carry some contaminants away, giving more tolerance in intake filtration.
Q5: Why are dimensions not listed?
Centrifugal machines are supplied as project-specific packages, and intake assembly dimensions differ between groups and package scopes within the same series. Listing a single size would be misleading. We recommend measuring the old element (outer diameter, inner diameter, overall height, seal type) or providing photos of the old element and the machine nameplate so we can cross-check by part number.
Q6: What happens when intake resistance rises?
First, energy consumption increases: each 1 kPa of added intake resistance raises compression ratio by about 1% and machine energy consumption by about 1%. Second, intake volume falls, reducing discharge volume. Running past the change threshold costs more in electricity than the element saves.
Q7: Can alternative parts be used?
Yes, but verify three things: filtration rating, end cap seal type and dimensions. If an alternative's seal type does not match the original, bypass occurs. On an oil-free centrifugal machine, bypass means particles reach the impeller directly, a higher risk than on oil-flooded machines. When buying alternatives, provide photos of the old element and this part number.
Q8: What 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 machine and recheck seating and seal condition. Also check the intake depression gauge impulse line for blockage to avoid misdiagnosis.
Q9: How should spares be stored?
Store in a dry, ventilated place 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 similar filters are easily confused?
In the Ingersoll Rand centrifugal product line, a single machine often carries both an intake filter and a downstream clean-side filter with different part numbers and mounting positions. Before ordering, confirm whether the element is for the intake or clean side; filtration rating, materials and seal type differ between the two.
Compatible Machines
| Item | Details |
|---|---|
| Machine type | Centrifugal air compressor |
| Product line | Ingersoll Rand centrifugal product line (CC) |
| Series | MSG TURBO-AIR / MSG Centac |
| Part-level machine code | P675 |
| 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 only; individual fitment must be confirmed by serial number):
| Series | Representative models |
|---|---|
| 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 other high-pressure units |
| Packaged systems | Refrigerated dryers, filters, air receivers and other downstream treatment for the above units |
Why verify by part number rather than machine model: centrifugal machines are supplied as project-specific packages. Intake assembly configuration, downstream treatment scope and connection dimensions can differ between projects for the same machine model. A single machine also carries both intake and downstream clean-side elements with different part numbers. The old part number is the primary reference, the machine nameplate is secondary, and the mounting position is the third check.
Three-step verification
- Read the stamped part number on the old element end cap or cage and compare with the ordered part number.
- Read the model and group identifier on the machine nameplate and compare with the machine parts manual.
- Confirm the old element's mounting position (intake or clean side); the two are not interchangeable.
If these three steps do not confirm fitment, provide a photo of the machine nameplate, a photo of the old element (including the stamped part number) and the mounting position. We will cross-check by part number.
Cross-series note: centrifugal machine elements and oil-flooded screw machine elements belong to different part number systems and cannot be interchanged. Screw compressor air filters are dimensioned and connected for external intake assemblies; direct substitution will cause seal failure.
Related Parts
Parts maintained on the same cycle or in the same air path section on the Ingersoll Rand centrifugal product line:
| Part | Part number | Function | Check points |
|---|---|---|---|
| Sterile filter element | 47722478001 | Downstream sterile-grade element, further removing microorganisms and particles from compressed air for higher cleanliness requirements | Different filtration stage from the intake element; part numbers are not interchangeable. Confirm mounting position when replacing. |
| Air filter assembly (housing) | — | Housing assembly that holds and locates the intake element | Check clamps, sealing faces and outlet end for deformation or corrosion |
| Intake depression / differential gauge | — | Displays intake resistance; final criterion for the change interval | Check the impulse line regularly for blockage; a blocked line gives a falsely clean reading |
| Seals | — | Prevent bypass between element and assembly | Check together with the element; replace if flattened, hardened or missing |
| Machine lubricating oil and oil filter | — | For the gearbox and bearing lubrication system (not the compression chamber) | Change per the machine parts manual interval; check alongside the intake element |
Paired replacement advice: check the intake element, downstream clean-side element and seals at the same time, but decide each on its own criteria. The intake and downstream clean-side elements have different change intervals (the downstream element is usually judged by cleanliness requirement rather than dust loading), so they need not be changed together.
For specific part numbers: items marked "—" above should be confirmed against the machine's parts manual. Centrifugal machines are packaged per project, and the associated part numbers listed in the manual correspond to the serial numbers of the machines in that project; they should not be applied across projects.