Product
Ingersoll Rand 47722477001 Air Filter Element | Centrifugal Compressor Intake
Replacement intake air filter element for Ingersoll Rand MSG TURBO-AIR and MSG Centac centrifugal compressors. Part number 47722477001, piece-level model code P675, 5–10 μm filtration at ≥98% efficiency. Verify by part number before ordering.
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Product Overview
47722477001 is the intake air filter element for Ingersoll Rand centrifugal air compressors. It mounts inside the intake filter assembly, upstream of the centrifugal impeller inlet. As outside air is drawn in, dust, grit, and fibers are captured before they reach the impeller and intercooler.
This element is the first barrier in the air path of a centrifugal machine. The downstream impeller is a high-speed rotating component, and deposited dust can shift its dynamic balance. Intake filtration condition therefore directly affects rotor stability and maintenance cost.
This part number belongs to the Ingersoll Rand centrifugal product line (line code CC). The piece-level model code is P675, with package group identifier C675. Centrifugal machines are designed as 100% oil-free (ISO 8573-1 Class 0); with no lubricating oil in the compression chamber to carry contaminants away, particles deposit on the impeller and cooler surfaces. Intake 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 change interval | 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 (G4/F7 etc.) does not apply |
| Dust holding capacity | — |
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 clean and new |
| Operating differential range | Rises gradually with dust loading; typical range approx. 0.5–1.5 kPa |
| Alarm / final resistance | Typical replacement 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 the compression ratio by about 1%, increasing machine energy consumption by about 1.0% |
Pressure drop / energy detail (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 the replacement threshold, intake resistance rises by more than 2 kPa, and machine energy consumption rises by roughly 2% in step. Centrifugal machines are high-power and often run continuously, so this energy gap typically exceeds the price of the element itself. Running on a calendar schedule rather than on resistance is not economical.
Construction and Materials
| Parameter | Value / Notes |
|---|---|
| Filter media | Wood-pulp cellulose filter paper, pleated construction |
| Media basis weight | Approx. 130 g/m² |
| Inner / outer support | Galvanized steel perforated cages supporting the media on both sides |
| End caps | Metal or polyurethane end caps bonded to the media |
| Seal | Polyurethane or nitrile rubber seal, integral with or separate from the end cap |
| Bonding | Polyurethane adhesive securing and edge-sealing media to caps and cages |
Operating Tolerance
| Parameter | Value / Notes |
|---|---|
| Operating temperature | -10 °C to +80 °C |
| Relative humidity | ≤90% RH, non-condensing |
| Burst / collapse resistance | Standard design withstands a differential pressure across the media of not less than 5 kPa without deformation |
| Function | Intake-stage filtration for oil-free centrifugal machines; works with the downstream clean filter element to maintain air quality |
Service Life and Storage
| 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) and bring the time limit forward |
| Storage shelf life | Use within 24 months; store dry, ventilated, out of direct light, protected from moisture and crushing |
| Replacement criteria | Intake depression gauge reading exceeds limit, or media shows damage, debonding, or a flattened seal face |
Applicable Standards
| Standard | Notes |
|---|---|
| ISO 5011 | Test method for intake filter efficiency and dust holding capacity — the performance basis for this class of air filter element |
| ISO 8573-1 | Compressed air quality classes; this class of machine is Class 0 (100% oil-free) |
| Note | ISO 2941 / 2942 / 2943 / 3723 / 3724 series commonly cited in replacement-part literature are hydraulic filter standards covering pressure, burst, and filtration characteristics; they do not apply to air filter elements and should not be used as performance evidence for air filters. |
Installation and Standard Maintenance
Step 1 — Confirm machine status and parts. Check the machine nameplate model and group identifier, and confirm the purchased element matches the old part number. Have the new element, clean cloths, and necessary tools ready.
Step 2 — Shut down, depressurize, and lock out. Follow the shutdown procedure and wait until the machine is fully depressurized (centrifugal machines have rotational inertia; wait for the controller to confirm zero speed). Disconnect 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 part number stamped on the old element end cap and note its mounting position, then confirm it matches the purchased part. Intake-stage and clean-stage elements on centrifugal machines 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 observe dust distribution and media condition. Criteria: replace immediately if the media is torn or perforated, the end cap is debonded, or the seal face is flattened, even if the interval has not been reached. If the outer surface carries black oily sludge, intake oil mist is abnormal and the upstream environment should be investigated.
Step 5 — Clean the assembly interior. Wipe the inner walls and base with a lint-free cloth. Do not blow compressed air hard into the assembly (it drives dust into the intake duct). Criteria: 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. Criteria: element seats without movement and the seal face is evenly compressed around its circumference.
Step 7 — Reassemble and confirm sealing. Refit the cover or clamp and tighten evenly per machine 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, and record. Reset the maintenance timer, start the machine at no load, and observe the intake depression gauge reading and running sound. Criteria: gauge steady within the machine's permitted range, no abnormal whistling (whistling often indicates seal bypass). Record the machine running hours at this change as the start of the next interval.
Frequently Asked Questions
Q1: Which machines use 47722477001?
Ingersoll Rand centrifugal air compressors — MSG TURBO-AIR and MSG Centac series and their packaged systems (piece-level model code P675, package 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 used on an oil-flooded screw compressor?
Not recommended. This is an intake element from the centrifugal product line, sized and ported 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 2,000 hours or 3 months, whichever comes first. In high-dust environments (cement, quarrying, mining, metalworking), reduce hours to approximately 1,500. The intake depression gauge reading is the final criterion — replace when it exceeds the limit, regardless of hours run.
Q4: Why do centrifugal machines demand more of intake filtration than screw machines?
Centrifugal machines are oil-free; with no oil film in the compression chamber to carry contaminants away, particles deposit on the high-speed impeller and intercooler surfaces. Impeller fouling shifts dynamic balance and requires a shutdown and rotor correction. Screw machines have an oil film that carries some contaminants away, giving more tolerance in intake filtration.
Q5: Why are dimensions not listed?
Centrifugal machines are supplied as project packages, and intake assemblies differ between package groups and package scopes within the same series. Listing a single dimension would be misleading. We recommend measuring the old element's outer diameter, inner diameter, overall height, and seal type, or providing photos of the old element and the machine nameplate; we then cross-check by part number before confirming.
Q6: What happens when intake resistance rises?
First, energy consumption rises: each 1 kPa increase in intake resistance raises the compression ratio by about 1% and machine energy consumption by about 1%. Second, intake volume falls and machine discharge volume drops with it. Continuing past the replacement threshold saves less on the element than it adds in electricity cost.
Q7: Can an alternative part be used?
Yes, but three items must be verified: filtration rating, end cap seal type, and dimensions. An alternative whose seal type differs from the original will bypass — and for an oil-free centrifugal machine, bypass means particles go straight to the impeller, a higher risk than on an oil-flooded machine. When sourcing 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: is the element seated, is the seal face flattened or rolled. Also check the intake depression gauge impulse line for blockage to avoid misjudgment.
Q9: How should spare elements be stored?
Store dry, ventilated, and out of direct light; protect from moisture, rain, and heavy loads. Moisture reduces media strength, and compression deformation damages the seal fit. Use within 24 months.
Q10: Which elements in the same series are easily confused?
In the Ingersoll Rand centrifugal product line, a single machine often carries both an intake-stage element and a downstream clean-stage element, with different part numbers and mounting positions. Before ordering, confirm whether the position is intake stage or clean stage — the two differ in filtration rating, materials, and seal type.
Compatible Machine Types
This element applies to Ingersoll Rand centrifugal air compressors as follows:
| Item | Detail |
|---|---|
| Machine type | Centrifugal air compressor |
| Product line | Ingersoll Rand centrifugal product line (CC) |
| Series | MSG TURBO-AIR / MSG Centac |
| Piece-level model code | P675 |
| Package 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, textile, pneumatic conveying) |
Representative model families (family-level reference; individual fitment must be verified by serial number)
| Series | Representative models |
|---|---|
| MSG TURBO-AIR | TA / NX packaged machines |
| 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 machines |
| Packaged systems | Refrigerated dryers, filters, air receivers and other downstream equipment for the above machines |
Why selection must be verified by part number, not by machine model
Centrifugal machines are supplied as project packages: intake assembly configuration, downstream scope, and connection dimensions can differ between projects for the same machine model, and a single machine carries both intake-stage and downstream clean-stage elements with different part numbers. Selection should therefore be based first on the part number stamped on the old element, second on the machine nameplate, and third on the mounting position.
Three-step verification
- Read the part number stamped on the old element end cap or cage and compare it with the purchased 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 stage or clean stage) — the two are not interchangeable.
If the three steps do not resolve it, provide a nameplate photo, a photo of the old element (including the stamped part number), and the mounting position; we will cross-check by part number before confirming.
Cross-series note: centrifugal machine elements and oil-flooded screw machine elements belong to different part number systems and cannot be used across series. Screw compressor air filters are sized and ported for external intake assemblies; direct substitution will cause seal failure.
Related Components
Components maintained on the same cycle or in the same air path section of the Ingersoll Rand centrifugal product line:
| Component | Part number | Function | Check points |
|---|---|---|---|
| Sterile filter element | 47722478001 | Downstream sterile-grade element, further removing microorganisms and particles where higher air purity is required | Different filtration stage from the intake element; part numbers are not interchangeable — confirm mounting position when replacing |
| Air filter assembly (housing) | — | Housing assembly that carries and locates the intake element | Check clamps, seal faces, and outlet end for deformation and corrosion |
| Intake depression / differential gauge | — | Displays intake resistance; the final criterion for the change interval | Periodically check the impulse line for blockage — blockage gives a false "clean" reading |
| Seals | — | Prevent bypass between element and assembly | Inspect 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) | Replace per the machine parts manual interval; inspect together with the intake element |
Paired replacement guidance: inspect the intake element, the downstream clean element, and the seals together, and decide replacement for each on its own criteria. The intake and downstream clean elements have different intervals (the downstream element is usually judged by cleanliness requirements rather than dust loading), so they need not be changed together.
For specific part numbers: items marked "—" above should be confirmed against the machine-specific parts manual. Centrifugal machines are supplied as project packages, and the associated part numbers listed in the manual correspond to the serial number of the applied machine; they should not be carried across projects.