Product
Ingersoll Rand 47722477001 Air Filter Element for MSG TURBO-AIR / Centac
Ingersoll Rand 47722477001 inlet air filter element for MSG TURBO-AIR and MSG Centac centrifugal compressors (item code P675, group C675). 5–10 μm filtration at ≥98% efficiency, cellulose pleated media, −10 to +80 °C, 2000 h / 3-month change interval. Verify by part number before ordering.
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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, capturing dust, grit and fibers before they reach the impeller and intercooler.
This part belongs to the Ingersoll Rand centrifugal (CC) product line, with item-level model code P675 and unit group designation C675. Centrifugal units are designed as 100% oil-free (ISO 8573-1 Class 0). Because there is no lubricating oil in the compression chamber to carry contaminants away, particles deposit directly on the impeller and cooler surfaces — inlet filtration requirements are therefore higher than for oil-flooded screw compressors.
Key Specifications
| Item | Value |
|---|---|
| Part number | 47722477001 |
| Product name | Air Filter Element |
| Brand | Ingersoll Rand |
| Application | Ingersoll Rand centrifugal compressors (MSG TURBO-AIR / MSG Centac series) and packaged systems |
| Item-level model code | P675 |
| Unit group designation | 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 |
| Operating temperature | −10 °C to +80 °C |
| Filter media | Cellulose (wood-pulp fiber) pleated paper, approx. 130 g/m² |
| Support structure | Galvanized steel perforated inner and outer cages |
| End caps | Metal or polyurethane, bonded to media |
| Seal | Polyurethane or NBR, integral or separate |
| Installation position | Inside intake filter assembly, upstream of impeller inlet |
| Air quality class | 100% oil-free, ISO 8573-1 Class 0 |
Fitment Verification
Centrifugal units typically carry two filter elements — an inlet-stage element and a downstream clean-air element — with different part numbers. Before ordering, confirm: (1) the part number stamped on the old element's end cap or cage matches the number you are ordering; (2) the model and group designation on the unit nameplate; (3) the old element's installation position (inlet stage vs. clean stage). Ordering by unit model alone is a common source of error, especially on centrifugal machines.
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 classes such as G4/F7 do not apply |
Flow and Pressure Drop
| Parameter | Value / Notes |
|---|---|
| Rated air flow | Must exceed unit rated inlet flow; match after correcting for discharge volume, inlet 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 of inlet resistance raises the compression ratio by about 1%, increasing unit energy consumption by approx. 1.0% |
Pressure drop / energy relationship (theoretical, at 0.85 MPa discharge gauge pressure):
| Inlet 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% |
Over the life of a single element, inlet resistance climbs by more than 2 kPa, adding roughly 2% to unit energy consumption. Centrifugal units are high-power and typically run continuously, so this energy penalty often exceeds the price of the element itself. Running past the resistance threshold rather than changing on schedule is not economical.
Materials of Construction
| Component | Material |
|---|---|
| Filter media | Cellulose (wood-pulp fiber) paper, pleated |
| Media weight | Approx. 130 g/m² |
| Inner / outer cage | Galvanized steel, perforated, supporting media on both sides |
| End caps | Metal or polyurethane, bonded to media |
| Seal | Polyurethane or NBR, integral with or separate from end cap |
| Bonding | Polyurethane adhesive for media-to-cap and media-to-cage sealing |
Operating Limits and Service Life
| Parameter | Value / Notes |
|---|---|
| Operating temperature | −10 °C to +80 °C |
| Relative humidity | ≤90% RH, non-condensing |
| Collapse / burst 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 | Shorten hours accordingly (e.g. approx. 1500 hours); calendar limit also moves earlier |
| Shelf life | Use within 24 months; store dry, ventilated and out of direct light, protected from moisture and crushing |
| Replacement criteria | Intake depression gauge reading out of range, or media damage, adhesive failure, or flattened seal face |
Applicable Standards
| Standard | Notes |
|---|---|
| ISO 5011 | Test method for inlet filter efficiency and dust holding capacity; basis for performance characterization of this air filter element |
| ISO 8573-1 | Compressed air quality classes; this unit family is Class 0 (100% oil-free) |
| Note | ISO 2941 / 2942 / 2943 / 3723 / 3724 are hydraulic filter standards for pressure, burst and filtration characteristics and do not apply to air filter elements; they should not be used as performance evidence when sourcing |
Installation and Maintenance Steps
Step 1 — Confirm unit status and spare parts. Check the unit nameplate model and group designation, and confirm the new element matches the old part number. Have the new element, lint-free cloths and required tools ready.
Step 2 — Shut down, depressurize and lock out. Follow the shutdown procedure and wait until the unit is fully depressurized (centrifugal units have rotational inertia — wait for the controller to confirm zero speed). Isolate the main power and apply lockout/tagout. This step is mandatory.
Step 3 — Verify the old element before disassembly. Before opening the intake filter assembly, read the stamped part number on the old element's end cap and note its installation position. Confirm it matches the ordered part before proceeding. Inlet-stage and clean-stage elements carry different part numbers — this step is the key error-prevention check.
Step 4 — Remove and inspect the old element. Lift the old element out vertically and examine dust distribution and media condition. Replace immediately if the media is torn, perforated, the end cap has debonded, or the seal face is flattened — even if the interval has not elapsed. Black oily sludge on the outer surface indicates abnormal oil mist in the intake; investigate the upstream environment (a priority check on oil-free units).
Step 5 — Clean the assembly interior. Wipe the inner walls and base with a lint-free cloth. Do not blow compressed air into the assembly — this drives dust into the intake duct. Criterion: no loose dust on inner walls, seal face flat and free of debris.
Step 6 — Install the new element. Fit the new element in the same orientation and position as the old one, observing seal face direction and clamping method. Criterion: no movement once seated, seal face evenly compressed around its circumference.
Step 7 — Reassemble and confirm sealing. Refit the cover or clamp and tighten evenly per unit requirements. Check that the intake depression gauge impulse line is clear — a blocked impulse line gives a false "clean" reading and is a common source of misjudgment.
Step 8 — Reset, test run and record. Reset the maintenance timer, start the unit unloaded, and observe the intake depression gauge and running sound. Criterion: gauge stable within the unit's permitted range, no abnormal whistling (whistling usually indicates seal bypass). Record the unit running hours at replacement as the starting point for the next interval.
FAQ
Q1: Which machines use 47722477001?
Ingersoll Rand centrifugal air compressors — MSG TURBO-AIR and MSG Centac series and their packaged systems (item-level model code P675, unit group designation C675). Centrifugal units are 100% oil-free by design. For any specific unit, confirm against the nameplate and the old element's part number.
Q2: Can it be used on 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; mixing them 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), shorten to approximately 1500 hours. Ultimately the intake depression gauge reading governs: replace when it exceeds the limit, regardless of running hours.
Q4: Why is inlet filtration more critical on centrifugal than screw compressors?
Centrifugal units are oil-free, so there is no lubricating oil in the compression chamber to carry contaminants away; particles deposit on the high-speed impeller and intercooler surfaces. Impeller fouling causes dynamic balance drift, which requires shutdown and rotor correction to resolve. Screw compressors have an oil film that carries some contaminants away, giving more tolerance in inlet filtration.
Q5: Why are dimensions not listed?
Centrifugal units are supplied as project-based packages; intake assembly dimensions vary between groups and package scopes within the same series, so publishing a single dimension set can mislead buyers. We recommend measuring the old element's OD, ID, overall height and seal type, or providing photos of the old element and the unit nameplate so we can cross-reference by part number.
Q6: What happens when inlet resistance rises?
First, energy consumption increases: each 1 kPa of inlet resistance raises the compression ratio by about 1%, adding roughly 1% to unit energy consumption. Second, inlet air volume drops, reducing discharge volume. Running past the change threshold costs more in electricity than the element costs to replace.
Q7: Can aftermarket equivalents be used?
Yes, but verify three things: filtration rating, end-cap seal type, and dimensions. An equivalent with a different seal configuration can bypass — and on an oil-free centrifugal unit, bypass means particles reach the impeller directly, a higher risk than on oil-flooded machines. When sourcing equivalents, provide photos of the old element along with 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 a seal is missing. Stop the unit immediately and recheck seating and seal condition. Also check whether the intake depression gauge impulse line is blocked 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 deformation damages the sealing fit. Use within 24 months.
Q10: Which similar elements are easily confused?
In the Ingersoll Rand centrifugal product line, the same unit often carries both an inlet-stage and a downstream clean-air element, with different part numbers and installation positions. Always confirm whether you need the inlet stage or the clean stage before ordering — filtration rating, materials and seal type differ between the two.
Compatible Machines
| Item | Details |
|---|---|
| Machine type | Centrifugal air compressor |
| Product line | Ingersoll Rand centrifugal line (CC) |
| Series | MSG TURBO-AIR / MSG Centac |
| Item-level model code | P675 |
| Unit group designation | 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 verified by serial number):
| Series | Representative models |
|---|---|
| MSG TURBO-AIR | TA / NX packaged units |
| MSG Centac standard pressure | C series (C400, C700, C800, C1000, C3000, etc.) |
| MSG Centac high pressure | C750, C1050, 2CII, 3C, 4C and similar high-pressure units |
| Packaged systems | Refrigerated dryers, filters, air receivers and other downstream equipment for the above units |
Why verify by part number rather than unit model: centrifugal units are supplied as project-based packages — intake assembly configuration, downstream scope and connection dimensions can differ between projects for the same unit model. The same unit also carries both inlet-stage and downstream clean-air elements with different part numbers. Select parts using 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 cage and compare it with the ordered part number.
- Read the model and group designation on the unit nameplate and compare with the unit parts manual.
- Confirm the old element's installation position (inlet stage / clean stage) — the two are not interchangeable.
If these three steps do not confirm fitment, provide photos of the unit nameplate and old element (including the stamped part number) plus the installation position, and we will cross-reference by part number.
Cross-series note: centrifugal unit elements and oil-flooded screw compressor 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 Components
| Component | Part number | Function | Inspection points |
|---|---|---|---|
| Sterile filter element | 47722478001 | Downstream sterile-grade element for further removal of microorganisms and particles where higher air purity is required | Different filtration stage from the inlet element; part numbers are not interchangeable — confirm installation position |
| Air filter assembly (housing) | — | Housing assembly that holds and locates the inlet element | Check clamps, seal faces and outlet end for deformation or corrosion |
| Intake depression / differential gauge | — | Displays inlet resistance; the final criterion for change intervals | Periodically check the impulse line for blockage — a blocked line gives a false "clean" reading |
| Seals | — | Prevent bypass between element and assembly | Inspect together with the element; replace if flattened, hardened or missing |
| Unit lubricating oil and oil filter | — | For the gearbox and bearing lubrication system (not the compression chamber) | Change per the unit parts manual interval; inspect alongside the inlet element |
Recommended companion checks: inspect the inlet element, downstream clean-air element and seals together, deciding replacement for each by its own criteria. Change intervals differ (downstream elements are usually judged by cleanliness requirements rather than dust loading), so synchronized replacement is not required.
For specific part numbers: items marked "—" above should be confirmed against the unit's own parts manual. Centrifugal units are supplied as project packages; the companion part numbers listed in the manual correspond to the serial number of the applied unit and should not be carried across projects.