Product
Ingersoll Rand 47722477001 Air Filter Element | MSG Centac Inlet Filter
Ingersoll Rand 47722477001 inlet air filter element for MSG TURBO-AIR and MSG Centac centrifugal compressors (part-level model code P675, unit group C675). 5–10 μm filtration rating, ≥98% efficiency, cellulose pleated media, -10 to +80 °C. 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 installs inside the intake filter assembly, upstream of the centrifugal impeller inlet. As the first barrier in the air path, it captures dust, grit and fibers before they reach the impeller and intercooler.
This part belongs to the Ingersoll Rand centrifugal (CC) product line, with part-level model code P675 and unit group designation C675. Centrifugal units 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 directly on the impeller and cooler surfaces. Inlet filtration requirements are therefore higher than for oil-flooded screw compressors.
Core Specifications
| 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 Replacement | 2,000 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 classification systems (G4/F7 etc.) do not apply |
| Dust Holding Capacity | — |
Flow and Resistance
| Parameter | Value / Notes |
|---|---|
| Rated Air Flow | Must exceed unit rated intake volume; select based on discharge volume corrected for inlet temperature and altitude |
| Initial Pressure Drop | Approx. 0.3–0.5 kPa (clean, new element) |
| Operating Differential Range | Rises with dust loading; typical operating range approx. 0.5–1.5 kPa |
| Alarm / Final Resistance | Typical replacement threshold approx. 1.5–2.5 kPa; for 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 approx. 1%, increasing unit energy consumption by approx. 1.0% |
Pressure drop / energy relationship (theoretical, based on compression ratio 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 replacement threshold, intake resistance rises by over 2 kPa, increasing unit energy consumption by roughly 2%. Centrifugal units are high-power and typically run continuously — this energy differential often exceeds the filter element price, so running past the resistance threshold is not economical.
Construction and Materials
| Parameter | Value / Notes |
|---|---|
| Filter Media | Cellulose fiber paper (wood pulp), pleated construction |
| Media Weight | Approx. 130 g/m² |
| Inner / Outer Support | Galvanized steel perforated cage, supporting media on both sides |
| End Caps | Metal or polyurethane end caps, bonded to media |
| Seal | Polyurethane or nitrile rubber seal, integrated with or separate from end cap |
| Bonding | Polyurethane adhesive for media-to-end-cap and cage fixing and edge sealing |
Operating Conditions
| Parameter | Value / Notes |
|---|---|
| Operating Temperature | -10 °C to +80 °C |
| Relative Humidity | ≤90% RH (non-condensing) |
| Burst / Collapse Resistance | Standard design withstands differential pressure across media of not less than 5 kPa without deformation |
| Function | Inlet-stage filtration for oil-free centrifugal units; works with downstream clean filtration elements to maintain air quality |
Service Life and Maintenance
| Parameter | Value / Notes |
|---|---|
| Service Life | 2,000 hours or 3 months (whichever comes first) |
| High-Dust Environment | Reduce hours accordingly (e.g. approx. 1,500 hours); time limit also shortened |
| Shelf Life | Use within 24 months recommended; store in dry, ventilated, light-protected area; avoid moisture and compression deformation |
| Replacement Criteria | Intake depression gauge reading exceeds limit, or media shows damage, debonding, or compressed seal face |
Applicable Standards
| Standard | Notes |
|---|---|
| ISO 5011 | Inlet air filter efficiency and dust holding capacity test method — performance characterization basis for this type of air filter element |
| ISO 8573-1 | Compressed air quality classes; this unit type is Class 0 (100% oil-free) |
| Note | ISO 2941 / 2942 / 2943 / 3723 / 3724 series commonly cited in replacement-part documentation are hydraulic filter standards for pressure, burst and filtration characteristics — not applicable to air filter elements and should not be used as performance basis for air filters |
Standard Installation and Maintenance Procedure
Step 1: Confirm unit status and spare parts. Check the unit nameplate model and group designation; confirm the replacement element matches the old part number. Prepare the new element, clean cloths and necessary tools.
Step 2: Shut down, depressurize, and lock out. Follow the shutdown procedure and wait for complete depressurization (centrifugal units have rotational inertia — wait for the controller to confirm zero speed). Disconnect main power and apply lockout/tagout. This step is mandatory.
Step 3: 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 installation position to confirm it matches the purchased part. Inlet and clean stages use different part numbers — this step is the key error-prevention check.
Step 4: Remove old element and assess. Lift out the old element vertically and inspect dust distribution and media condition. Criteria: if media shows damage, perforation, end-cap debonding or compressed seal face, replace immediately even if the service interval has not been reached. Black oily sludge on the outer surface indicates abnormal oil mist in the intake — investigate upstream conditions (particularly important for oil-free units).
Step 5: Clean the assembly interior. Wipe the inner walls and bottom with a lint-free cloth. Do not blow compressed air into the assembly (this drives dust into the intake path). Criteria: no loose dust on inner walls; seal faces flat and free of debris.
Step 6: Install the new element. Insert in the same orientation and position as the old part, noting seal face direction and compression method. Criteria: element seats without movement; seal face uniformly compressed around the circumference.
Step 7: Reassemble and confirm seal. Replace cover or clamp and tighten evenly per unit requirements. Check that the intake depression gauge impulse line is clear — a blocked line gives a false "clean" reading and is a common source of misjudgment.
Step 8: Reset, test run, record. Reset the maintenance timer, start the unit at no load, and observe the intake depression gauge reading and running sound. Criteria: gauge stable within the unit's allowable range; no abnormal whistling (whistling often indicates seal bypass). Record the unit running hours at replacement as the starting point for the next interval.
Frequently Asked Questions
Q1: Which units use 47722477001?
Ingersoll Rand centrifugal air compressors — MSG TURBO-AIR and MSG Centac series and their packaged systems (part-level model code P675, unit group designation C675). Centrifugal units are 100% oil-free by design. For a specific unit, confirm against the unit nameplate and old part number.
Q2: Can it be used on an oil-flooded screw compressor?
Not recommended. This part belongs to the centrifugal product line; dimensions and connections are designed for centrifugal unit 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 replacement interval?
Standard interval is 2,000 hours or 3 months, whichever comes first. In high-dust environments (cement, quarrying, mining, metalworking), reduce hours to approximately 1,500. The final criterion is the intake depression gauge reading — replace when it exceeds the limit, regardless of running hours.
Q4: Why do centrifugal compressors have higher inlet filtration requirements than screw compressors?
Centrifugal units are oil-free by design — there is no lubricating oil in the compression chamber to carry contaminants away, so particles deposit on high-speed impeller and intercooler surfaces. Impeller fouling causes dynamic balance shift, requiring shutdown and rotor correction. Screw compressors have an oil film that can partially carry contaminants away, giving greater tolerance for inlet filtration.
Q5: Why are dimensions not listed?
Centrifugal units are supplied as project-specific packages; intake assembly dimensions vary between groups and package scopes within the same series, so listing a single dimension could mislead procurement. We recommend measuring the old element's outer diameter, inner diameter, overall height and seal type, or providing photos of the old part and unit nameplate so we can cross-reference by part number.
Q6: What are the consequences of increased intake resistance?
First, energy consumption rises — each 1 kPa increase in intake resistance raises compression ratio by approximately 1%, increasing unit energy consumption by approximately 1%. Second, intake volume drops, reducing discharge volume. Continuing to use an element past the replacement threshold costs more in electricity than the filter element itself.
Q7: Can alternative parts be used?
Yes, but three items must be verified: filtration rating, end-cap seal type, and dimensions. If the seal type does not match the original structure, bypass occurs — for oil-free centrifugal units, bypass means particles enter the impeller directly, a higher risk than for oil-flooded units. When purchasing alternatives, provide photos of the old part and this part number.
Q8: What if abnormal whistling occurs after installation?
Whistling usually indicates seal bypass — element not fully seated, deformed seal face, or missing seal. Stop the unit immediately and check: element seating, seal face compression or inversion. Also check the intake depression gauge impulse line for blockage to avoid misdiagnosis.
Q9: What are the storage requirements for spare parts?
Store in a dry, ventilated, light-protected area; avoid moisture, rain and heavy compression. Moisture reduces media strength; compression deformation damages seal fit. Use within 24 months recommended.
Q10: Which other filters in the same series are easily confused?
In the Ingersoll Rand centrifugal product line, the same unit often has both inlet filtration and downstream clean filtration elements with different part numbers and installation positions. Always confirm whether the part is for the inlet or clean stage — filtration rating, materials and seal type differ between stages.
Compatible Models
This part is for Ingersoll Rand centrifugal air compressors:
| Item | Details |
|---|---|
| Unit Type | Centrifugal air compressor |
| Product Line | Ingersoll Rand centrifugal product line (CC) |
| Series | MSG TURBO-AIR / MSG Centac |
| Part-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 & beverage, pharmaceutical, electronics, textile, pneumatic conveying, etc.) |
Representative model families (family-level reference; individual fit must be verified by serial number):
| Series | Representative Models |
|---|---|
| MSG TURBO-AIR | TA / NX series packaged units |
| MSG Centac standard pressure | C series (C400, C700, C800, C1000, C3000, etc.) |
| MSG Centac high pressure | C750, C1050, 2CII, 3C, 4C and other high-pressure units |
| Packaged systems | Refrigerated dryers, filters, air receiver and other downstream treatment for the above units |
Why part-number verification is essential rather than model-based selection
Centrifugal units are supplied as project-specific packages: the same unit model may have different intake assembly configurations, downstream treatment scope and connection dimensions across projects; and the same unit has both inlet-stage and downstream clean filtration elements with different part numbers. Selection should therefore be based first on the old part's stamped part number, second on the unit nameplate, and third on installation position.
Three-step verification method
- Read the stamped part number on the old element end cap or cage and compare with the ordered part number;
- Read the unit nameplate model and group designation and compare with the unit parts manual;
- Confirm the old part's installation position (inlet stage / clean stage) — the two stages are not interchangeable.
If these three steps do not confirm fit, provide photos of the unit nameplate, the old part (including stamped part number) and installation position description; we will cross-reference by part number and confirm.
Cross-series note: Centrifugal unit filter elements and oil-flooded screw compressor filter elements belong to different part number systems and cannot be used interchangeably. Screw compressor air filter dimensions and connections are designed for external intake assemblies; direct substitution will cause seal failure.
Related Components
Components in the Ingersoll Rand centrifugal product line's intake and air path system that share the same service interval or stage:
| Component | Part Number | Function | Inspection Points |
|---|---|---|---|
| Sterile filter element | 47722478001 | Downstream sterile-grade filtration, further removes microorganisms and particles from compressed air for higher air-quality applications | Different filtration stage from inlet element; part numbers not interchangeable; confirm installation position when replacing |
| Air filter assembly (housing) | — | Housing assembly that holds and secures the inlet filter element | Check clamps, seal faces and outlet end for deformation and corrosion |
| Intake depression gauge / differential pressure gauge | — | Displays intake resistance; final criterion for replacement interval | Periodically check impulse line for blockage — blockage gives a false "clean" reading |
| Seals | — | Ensures no bypass between element and assembly | Inspect together with element; replace if compressed, hardened or missing |
| Unit lubricating oil and oil filter | — | For gearbox and bearing lubrication system (not compression chamber oil) | Replace per unit parts manual intervals; inspect together with inlet filter element |
Paired replacement recommendation: Inspect inlet filter element, downstream clean filter element and seals together, and decide replacement for each based on its own criteria. Inlet and downstream clean elements have different replacement intervals (downstream elements are typically judged by cleanliness requirements rather than dust loading) and do not need to be replaced simultaneously.
For specific part numbers: Items marked "—" above should be confirmed against the unit's accompanying parts manual — centrifugal units are project-specific packages, and the manual lists part numbers corresponding to the application unit's serial number; do not apply across projects.