Product
Ingersoll Rand 47722477001 Air Filter Element | MSG Centac Centrifugal
Ingersoll Rand 47722477001 intake air filter element for MSG TURBO-AIR and MSG Centac centrifugal compressors. 5–10 μm filtration, ≥98% efficiency, cellulose pleated media, -10 to +80 °C. Order by part number with full verification support.
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Product Overview
47722477001 is the intake air filter element for Ingersoll Rand centrifugal air compressors. It is installed inside the intake filter assembly, upstream of the centrifugal impeller inlet. As the first barrier in the air path, it captures dust, sand, and fibers before they reach the impeller and intercoolers — protecting rotor balance and reducing maintenance cost on high-speed rotating components.
This part belongs to the Ingersoll Rand centrifugal (CC) product line, with piece-level model code P675 and unit group identifier C675. Centrifugal units are designed as 100% oil-free (ISO 8573-1 Class 0). With no lubricating oil in the compression chamber to carry away contaminants, all particles deposit on impeller and cooler surfaces — making intake filtration more critical than on oil-flooded screw compressors.
| 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 |
| Product Line | Centrifugal (CC) |
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% (for particles ≥5 μm) |
| Recommended Replacement | 2000 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; HVAC classification (G4/F7) does not apply |
Flow and Resistance
| Parameter | Value / Notes |
|---|---|
| Rated Air Flow | Must exceed unit rated intake volume; select based on discharge volume corrected for intake temperature and altitude |
| Initial Pressure Drop | Approx. 0.3–0.5 kPa (clean, new element) |
| Operating Differential Range | Rises with dust loading; normal operating range approx. 0.5–1.5 kPa |
| Alarm / Final Resistance | Typical replacement 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 approx. 1%, increasing unit energy consumption approx. 1.0% |
Construction and Materials
| Parameter | Value / Notes |
|---|---|
| Filter Media | Cellulose (wood pulp fiber) filter paper, pleated construction |
| Media Weight | Approx. 130 g/m² |
| Inner / Outer Support | Galvanized steel perforated cage, dual-sided media support |
| End Caps | Metal or polyurethane, bonded to media |
| Seal | Polyurethane or NBR seal, integral or separate |
| 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 | Intake-stage filtration for oil-free centrifugal units, working with downstream clean filtration to maintain air purity |
Service Life and Maintenance
| Parameter | Value / Notes |
|---|---|
| Service Life | 2000 hours or 3 months, whichever comes first |
| High-Dust Environment | Reduce hours accordingly (e.g. approx. 1500 hours); time limit also shortened |
| Shelf Life | Use within 24 months; 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 | Intake 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 unit class is Class 0 (100% oil-free) |
| Note | ISO 2941 / 2942 / 2943 / 3723 / 3724 series commonly cited for replacement parts 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
Step 1: Confirm unit status and spare parts. Check unit nameplate model and group identifier; confirm the new element matches the old part number. Prepare new element, clean cloth, and required tools.
Step 2: Shut down, depressurize, isolate power. Follow shutdown procedure, wait for full depressurization (centrifugal units have rotational inertia — wait for controller to confirm zero speed). Isolate main power and apply lockout/tagout. This is mandatory.
Step 3: Verify old part before disassembly. Before opening the intake filter assembly, read the stamped part number on the old element end cap and note its installation position. Centrifugal units have different part numbers for intake and clean stages — this step prevents errors.
Step 4: Remove old element and assess. Remove vertically and inspect dust distribution and media condition. Replace immediately if media shows damage, perforation, end-cap debonding, or compressed seal face — even if service interval has not been reached. Black oil sludge on the outer surface indicates abnormal oil mist in intake; investigate upstream conditions (especially on oil-free units).
Step 5: Clean assembly interior. Wipe inner walls and bottom with lint-free cloth. Do not blow compressed air directly into the assembly (it drives dust into the intake path). Criterion: no loose dust on inner walls; seal face flat and free of debris.
Step 6: Install new element. Install in the same orientation and position as the old element, observing seal face direction and compression method. Criterion: element seated without movement; seal face uniformly compressed around circumference.
Step 7: 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, a common source of misjudgment.
Step 8: 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 allowable range; no abnormal whistling (often indicates seal bypass). Record unit running hours at replacement as the starting point for the next interval.
Frequently Asked Questions
Q1: Which models use 47722477001?
Ingersoll Rand centrifugal air compressors — MSG TURBO-AIR and MSG Centac series and packaged systems (piece-level model code P675, unit group identifier C675). Centrifugal units are 100% oil-free. For a specific unit, verify against the nameplate and old part number.
Q2: Can it be used on oil-flooded screw compressors?
Not recommended. This is an intake filter element from the centrifugal product line, sized and ported for centrifugal intake assemblies. Oil-flooded screw compressors use a different part number system; cross-application cannot guarantee sealing or filtration performance.
Q3: What is the replacement interval?
Standard interval is 2000 hours or 3 months, whichever comes first. In high-dust environments (cement, quarrying, mining, metalworking), reduce to approx. 1500 hours. Final criterion is the intake depression gauge reading — replace when it exceeds the limit, regardless of running hours.
Q4: Why do centrifugal compressors require higher intake filtration than screw compressors?
Centrifugal units are oil-free; with no lubricating oil to carry away contaminants, particles deposit on high-speed impeller and intercooler surfaces. Impeller fouling causes balance offset requiring shutdown and rotor correction. Screw compressors have an oil film that partially carries away contaminants, giving more tolerance in intake 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. Listing a single dimension can mislead procurement. We recommend measuring the old element's outer diameter, inner diameter, overall height, and seal type, or providing old element photos and unit nameplate for verification 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 approx. 1%, increasing unit energy consumption approx. 1%. Second, intake volume drops, reducing discharge volume. Continuing 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, bypass occurs — on oil-free centrifugal units, bypass means particles enter the impeller directly, a higher risk than on oil-flooded units. Provide old element photos and this part number when sourcing alternatives.
Q8: What if abnormal whistling occurs after installation?
Whistling usually indicates seal bypass — element not fully seated, deformed seal face, or missing seal. Stop immediately and recheck: element seating, seal face compression or inversion. Also check the intake depression gauge impulse line for blockage to avoid misjudgment.
Q9: What are the storage requirements?
Store in dry, ventilated, light-protected area; avoid moisture, rain, and heavy compression. Moisture reduces media strength; compression deformation damages seal fit. Use within 24 months.
Q10: What other filter elements in the same series are easily confused?
In the Ingersoll Rand centrifugal product line, the same unit often has both intake filtration and downstream clean filtration elements with different part numbers and installation positions. Always confirm whether the intake or clean stage is required — filtration rating, materials, and seal types differ.
Compatible Models
This part applies to Ingersoll Rand centrifugal air compressors:
| Item | Content |
|---|---|
| Unit Type | Centrifugal air compressor |
| Product Line | Ingersoll Rand centrifugal product line (CC) |
| Series | MSG TURBO-AIR / MSG Centac |
| Piece-Level Model Code | P675 |
| Unit Group Identifier | C675 |
| Air Purity Class | 100% oil-free, ISO 8573-1 Class 0 |
| Typical Applications | Continuous, clean, oil-free air supply (food and 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 receivers and other downstream equipment for the above units |
Why verify by part number rather than unit model: Centrifugal units are supplied as project-specific packages — intake assembly configuration, downstream scope, and connection dimensions can vary between projects for the same unit. The same unit also has intake and downstream clean filtration elements with different part numbers. Always use the old element part number as the primary reference, unit nameplate as secondary, and installation position as tertiary.
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 unit nameplate model and group identifier and compare with the unit parts manual;
- Confirm the old element installation position (intake / clean stage) — the two are not interchangeable.
If verification cannot be completed, provide unit nameplate photos, old element photos (including stamped part number), and installation position description; we will cross-reference by part number.
Cross-series note: Centrifugal unit filter elements and oil-flooded screw compressor filter elements belong to different part number systems and are not interchangeable. Screw compressor air filters are sized and ported for external intake assemblies; direct substitution causes seal failure.
Related Components
Components maintained on the same cycle or in the same air path section as this part in the Ingersoll Rand centrifugal product line:
| Component | Part Number | Function | Inspection Points |
|---|---|---|---|
| Sterile filter element | 47722478001 | Downstream sterile-grade filtration, further removing microorganisms and particles from compressed air for higher purity applications | Different filtration stage from intake element; part numbers not interchangeable; confirm installation position at replacement |
| Air filter assembly (housing) | — | Housing assembly that holds and secures the intake filter element | Check clamps, seal faces, and outlet end for deformation or corrosion |
| Intake depression gauge / differential pressure gauge | — | Displays intake resistance; final criterion for replacement interval | Periodically 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 intake filter element |
Recommended replacement practice: Inspect intake filter element, downstream clean filter element, and seals together, deciding replacement individually per each criterion. Intake and downstream clean elements have different replacement intervals (downstream elements are typically judged by purity requirements rather than dust loading) and need not be replaced simultaneously.
For specific part numbers: Items marked "—" above should be verified against the unit-specific parts manual — centrifugal units are packaged per project and manual-listed part numbers correspond to the applied unit serial number; do not cross-apply between projects.
Ordering and Verification
To confirm fitment and receive a quotation, provide the old element part number, unit nameplate photo, and installation position. We support part-number-based verification and can supply datasheets on request. Contact us for pricing, lead time, and export packing details.