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, group C675). 5–10 μm filtration, ≥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 inlet filter assembly, upstream of the centrifugal impeller intake. As the first barrier in the air path, it captures dust, grit, and fibers before they reach the impeller and intercooler — critical protection for high-speed rotating components where dust buildup can shift dynamic balance and drive up maintenance costs.
This part belongs to the Ingersoll Rand centrifugal product line (line code CC), with part-level model code P675 and group designation C675. Centrifugal units are designed as 100% oil-free (ISO 8573-1 Class 0), meaning no lubricating oil carries contaminants away from the compression chamber. Particles deposit directly on impeller and cooler surfaces, so inlet filtration requirements exceed those of oil-flooded screw compressors.
| Item | Value |
|---|---|
| Part Number | 47722477001 |
| Product Name | Air Filter Element |
| Brand | Ingersoll Rand |
| Compatible Units | 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 Specifications
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; not classified under HVAC systems (G4/F7 etc.) |
| Dust Holding Capacity | — |
Flow and Pressure Drop
| Parameter | Value / Notes |
|---|---|
| Rated Air Flow | Must exceed unit rated inlet flow; matched after correction for discharge volume, 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 inlet resistance raises compression ratio by approx. 1%, increasing unit energy consumption by approx. 1.0% |
Pressure drop vs. energy consumption (theoretical calculation at 0.85 MPa discharge gauge pressure):
| Inlet Resistance | Compression Ratio | Energy Increase |
|---|---|---|
| 0 kPa (new) | 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, inlet resistance rises by more than 2 kPa, increasing energy consumption by approximately 2%. Centrifugal units are high-power and typically run continuously, so this energy penalty often exceeds the filter price itself — running past the resistance limit is not economical.
Construction and Materials
| Parameter | Value / Notes |
|---|---|
| Filter Media | Cellulose fiber filter paper, 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, integral or separate from end cap |
| Adhesive | Polyurethane adhesive for media-to-end-cap and cage bonding |
Operating Conditions
| Parameter | Value / Notes |
|---|---|
| Operating Temperature | -10 °C to +80 °C |
| Relative Humidity | ≤90% RH (non-condensing) |
| Burst / Collapse Pressure | Standard design withstands at least 5 kPa differential without deformation |
| Special Function | Inlet-stage filtration for oil-free centrifugal units; works with downstream clean filter element 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; store in dry, ventilated, dark area; avoid moisture and crushing |
| 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 basis for this class of air filter element |
| ISO 8573-1 | Compressed air quality classes; this class of unit is Class 0 (100% oil-free) |
| Note | ISO 2941 / 2942 / 2943 / 3723 / 3724 series commonly cited in replacement parts data 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 |
Installation and Maintenance Steps
- Confirm unit status and spare part. Check unit nameplate model and group designation; confirm the new element matches the old part number. Prepare new element, clean cloth and necessary tools.
- Shut down, depressurize, disconnect power. Follow shutdown procedure and wait for full depressurization (centrifugal units have rotational inertia — wait for controller to confirm zero speed). Lock out main power. This step is mandatory.
- Verify old part before disassembly. Before opening the inlet filter assembly, read the part number stamped on the old element end cap and note its installation position. Inlet and clean-stage elements on centrifugal units have different part numbers — this step prevents errors.
- Remove old element and inspect. Lift out vertically and observe dust distribution and media condition. Replace immediately if media is damaged, punctured, end cap is debonded, or seal face is compressed — even if the service interval has not been reached. If the outer surface has black oil sludge, investigate abnormal oil mist upstream (particularly important for oil-free units).
- Clean assembly interior. Wipe inner walls and bottom with lint-free cloth. Do not blow compressed air into the assembly (it drives dust into the intake). Criterion: no loose dust on walls, seal surface flat and free of debris.
- Install new element. Insert in the same orientation and position as the old part; note seal face direction and compression method. Criterion: element sits without movement, seal face evenly compressed around circumference.
- Reassemble and confirm seal. Refit 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.
- Reset, test run, record. Reset maintenance timer, start unit at no load, observe intake depression gauge reading and operating sound. Criterion: gauge stable within unit limits, no abnormal whistling (whistling often indicates seal bypass). Record 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 packaged systems (part-level model code P675, group designation C675). Centrifugal units are 100% oil-free by design. For a specific unit, always verify against the unit nameplate and old part number.
Q2: Can it be used on oil-flooded screw compressors?
Not recommended. This element belongs to the centrifugal product line; dimensions and connections are designed for centrifugal unit inlet assemblies. Oil-flooded screw compressors use a different part number system — cross-series 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, quarry, mining, metalworking), reduce to approx. 1,500 hours. Ultimately, the intake depression gauge reading is the criterion — replace when the reading 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 — no lubricating oil carries contaminants away from the compression chamber. Particles deposit on high-speed impeller and intercooler surfaces. Impeller dust buildup causes dynamic balance shift, requiring shutdown for rotor correction. Screw compressors have an oil film that partially carries away contaminants, giving more tolerance for inlet filtration.
Q5: Why are dimensions not listed?
Centrifugal units are supplied as project packages; inlet assembly dimensions vary between groups and package scopes within the same series. Listing a single dimension could mislead procurement. We recommend measuring the old element's outer diameter, inner diameter, total 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 inlet resistance?
First, energy consumption rises — each 1 kPa increase in inlet resistance raises compression ratio by approx. 1%, increasing unit energy consumption by approx. 1%. Second, inlet flow decreases, reducing discharge volume. Continuing to use a filter past its replacement threshold costs more in electricity than the filter itself.
Q7: Can alternative parts be used?
Yes, but verify three items: filtration rating, end cap seal type, and dimensions. If the seal type does not match the original, bypass occurs — for oil-free centrifugal units, bypass means particles enter the impeller directly, a higher risk than for oil-flooded units. When sourcing alternatives, provide old part photos 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?
Store in a dry, ventilated, dark area. Avoid moisture, rain and heavy compression. Moisture reduces media strength; compression deforms the seal fit. Use within 24 months.
Q10: What 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 — different part numbers, different installation positions. Always confirm whether you need the inlet stage or clean stage — filtration ratings, materials and seal types differ.
Compatible Models
This part is suitable 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 |
| 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, textiles, pneumatic conveying) |
Representative model families (family-level reference; individual compatibility 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 other high-pressure units |
| Packaged systems | Refrigerated dryers, filters, air receivers and other downstream equipment for the above units |
Why verify by part number instead of unit model: Centrifugal units are supplied as project packages — the same unit model may have different inlet assembly configurations, downstream equipment and connection dimensions across projects. The same unit also has both inlet-stage and downstream clean-stage elements with different part numbers. Therefore, selection should be based on: (1) the part number stamped on the old element, (2) the unit nameplate, and (3) the installation position.
Three-step verification method:
- Read the part number stamped on the old element end cap or cage and compare with the ordered part number.
- Read the unit nameplate model and group designation; 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 compatibility, provide unit nameplate photos, old part photos (including stamped part number) and installation position description. We will cross-reference by part number before confirming.
Cross-series note: Centrifugal compressor filter elements and oil-flooded screw compressor filter elements belong to different part number systems and cannot be used interchangeably. Screw compressor air filters are designed for external inlet assemblies — direct substitution will cause seal failure.
Related Parts
Components in the Ingersoll Rand centrifugal product line inlet and air path system that share the same maintenance cycle 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 cleanliness requirements | Different filtration stage from inlet filter; 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 surfaces and outlet end for deformation or corrosion |
| Intake depression gauge / differential pressure gauge | — | Displays inlet resistance; final criterion for replacement interval | Regularly check impulse line for blockage — blockage gives false "clean" readings |
| Seals | — | Prevents 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 |
Recommended companion replacement: 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 filter elements have different replacement intervals (downstream elements are typically judged by cleanliness requirements rather than dust loading) — they do not need to be replaced at the same time.
For specific part numbers: Items marked "—" above should be confirmed against the unit-specific parts manual. Centrifugal units are supplied as project packages; part numbers listed in the manual correspond to the application unit's serial number and should not be used across projects.
To request a quotation, datasheet or sample, please provide your unit nameplate photo, old element photo (with stamped part number) and required quantity. Our export team will respond with pricing, lead time and packing details.