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 (item-level model code P675, group C675). 5–10 μm filtration, ≥98% efficiency, cellulose pleated media, 2000-hour or 3-month replacement interval. Export-ready with part-number verification support.
- Export packaging & documentation support
- OEM / ODM customization available
- Sample and bulk order workflow
Product Overview
47722477001 is the inlet air filter element for Ingersoll Rand centrifugal air compressors. It installs inside the compressor's inlet filter assembly, upstream of the centrifugal impeller intake. As air is drawn in, dust, grit and fibers are captured before reaching the impeller and intercooler. This element is the first barrier in the air path of a centrifugal machine — the impeller downstream is a high-speed rotating component, and dust buildup causes dynamic balance drift, so inlet filtration condition directly affects rotor stability and maintenance cost.
This part belongs to the Ingersoll Rand centrifugal product line (line code CC), with item-level model code P675 and compressor group identifier C675. Centrifugal machines are designed as 100% oil-free (ISO 8573-1 Class 0) — there is no lubricating oil in the compression chamber to carry away contaminants, so particles deposit on impeller and cooler surfaces. Inlet filtration requirements are therefore higher than for oil-flooded screw compressors.
Core Specifications
| 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 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 compressor rated inlet flow; match after correcting 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 machines the compressor 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 compressor energy consumption by approx. 1.0% |
Pressure Drop / Energy Detail (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% |
From installation to replacement threshold, inlet resistance rises by more than 2 kPa and compressor energy consumption increases by approximately 2%. Centrifugal machines are high-power and typically run continuously, so this energy differential often exceeds the element's own price — running on calendar time rather than resistance is not economical.
Dimensions and Installation
| Parameter | Value / Notes |
|---|---|
| Overall Dimensions | — (verify by physical measurement) |
| Effective Filter Area | — (verify by physical measurement) |
| Pleat Count / Pitch | — (verify by physical measurement) |
| Mounting Interface | Matches inlet filter assembly interface; compare against old part |
| Seal Type | Face seal or radial seal; compare against old part |
Measurement Checklist (recommended before ordering replacement parts)
| Measurement | Notes |
|---|---|
| Outer Diameter | Outer edge of filter media |
| Inner Diameter | Center passage diameter |
| Overall Height | Including end caps |
| Seal Face Position and Type | Face / radial, and seal cross-section shape |
| Mounting Interface | Clamp, bolt hole or quick-fit configuration and dimensions |
Length, diameter and seal type directly determine fit and whether bypass occurs. Do not substitute compressor model number for physical measurement.
Material Construction
| Parameter | Value / Notes |
|---|---|
| Filter Media | Wood pulp fiber filter paper (cellulose media), 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 NBR rubber seal body, integral with or separate from end cap |
| Bonding Layer | Polyurethane adhesive for media-to-end-cap and cage fixing and edge sealing |
Operating Tolerance
| Parameter | Value / Notes |
|---|---|
| Operating Temperature | -10 °C to +80 °C |
| Relative Humidity | ≤90% RH (non-condensing) |
| Burst / Collapse Resistance | Standard design withstands at least 5 kPa differential without deformation |
| Special Function | Inlet-stage filtration for oil-free centrifugal machines, working with downstream clean filtration elements to maintain air quality |
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 shortens |
| Shelf Life | Use within 24 months; store in dry, ventilated, dark conditions, 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 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 for replacement parts are in fact 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 Maintenance and Installation Steps
Step 1: Confirm compressor status and spare parts
Check compressor nameplate model and group identifier; confirm the new element matches the old part number. Prepare new element, clean cloth and necessary tools.
Step 2: Shut down, depressurize, disconnect power
Follow shutdown procedure; wait for complete depressurization (centrifugal machines have rotational inertia — wait for controller to confirm zero speed). Disconnect main power and apply lockout/tagout. This is a mandatory step and must not be omitted.
Step 3: Verify old part before proceeding
Before opening the inlet filter assembly, read the stamped part number on the old element's end cap and note the installation position. Confirm it matches the ordered part before continuing. Inlet-stage and clean-stage elements on centrifugal machines have different part numbers — this step is critical for error prevention.
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 interval has not been reached. If the outer surface has black oily sludge, inlet oil mist is abnormal — inspect upstream environment (this should be investigated particularly on oil-free machines).
Step 5: Clean assembly interior
Wipe the assembly inner wall and bottom with a lint-free cloth. Do not blow compressed air directly into the assembly interior (this drives dust into the intake path). Criteria: 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 part, noting seal face direction and compression method. Criteria: element seats without movement, seal face evenly compressed around circumference.
Step 7: Reassemble and confirm seal
Refit cover or clamp and tighten evenly per compressor 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, record
Reset the maintenance timer, start the compressor at no load, observe intake depression gauge reading and running sound. Criteria: gauge stable within compressor allowable range, no abnormal whistling (whistling often indicates seal bypass). Record compressor running hours at this change as the starting point for the next interval.
Frequently Asked Questions
Q1: Which machines use 47722477001?
It is used on Ingersoll Rand centrifugal air compressors — MSG TURBO-AIR and MSG Centac series and their packaged systems (item-level model code P675, group identifier C675). Centrifugal machines are 100% oil-free by design. For a specific machine, confirm against the compressor nameplate and old part number.
Q2: Can it be used on an oil-flooded screw compressor?
Not recommended. This part is an inlet filter element from the centrifugal product line, with dimensions and interface designed for centrifugal compressor inlet assemblies. Oil-flooded screw compressors use a different part number system; mixing them cannot guarantee sealing and 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 hours to approximately 1500. The final criterion is the compressor intake depression gauge reading — replace when the reading exceeds the limit, regardless of running hours.
Q4: Why do centrifugal machines have higher inlet filtration requirements than screw machines?
Centrifugal machines are oil-free by design — there is no lubricating oil in the compression chamber to carry away contaminants, so particles deposit on the high-speed impeller and intercooler surfaces. Impeller dust buildup causes dynamic balance drift, requiring shutdown and rotor correction. Screw machines have an oil film that can partially carry away contaminants, giving greater tolerance for inlet filtration.
Q5: Why are dimensions not listed?
Centrifugal machines are supplied as project-based packages, and inlet assembly dimensions vary between groups and package scopes within the same series. Listing a single dimension would be misleading. We recommend measuring the old part's outer diameter, inner diameter, overall height and seal type, or providing old part photos and compressor nameplate for reverse lookup 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 approximately 1%, increasing compressor energy consumption by approximately 1%. Second, inlet flow decreases, reducing compressor discharge volume. Continuing to use beyond the replacement threshold costs more in electricity than the element itself.
Q7: Can alternative parts be used?
Yes, but three items must be verified: filtration rating, end-cap seal type, and dimensions. If an alternative part's seal type does not match the original, bypass occurs — for oil-free centrifugal machines, bypass means particles enter the impeller directly, a higher risk than for oil-flooded machines. When sourcing alternatives, provide old part photos and this part number.
Q8: What should I do if abnormal whistling occurs after installation?
Whistling usually indicates seal bypass — element not fully seated, seal face deformed, or seal missing. Shut down immediately and recheck: is the element seated, is the seal face compressed or inverted. Also check whether the intake depression gauge impulse line is blocked to avoid misjudgment.
Q9: What are the storage requirements?
Store in dry, ventilated, dark conditions; avoid moisture, rain and heavy compression. Moisture reduces media strength; compression deformation damages seal fit. Use within 24 months.
Q10: Which other elements in the same series are easily confused?
In the Ingersoll Rand centrifugal product line, the same machine often has both inlet-stage and downstream clean-stage filter elements with different part numbers and installation positions. Before ordering, confirm whether it is the inlet stage or clean stage — filtration rating, material and seal type differ between the two.
Compatible Machine Models
This part is applicable to Ingersoll Rand centrifugal air compressors, as follows:
| Item | Details |
|---|---|
| Machine Type | Centrifugal air compressor |
| Product Line | Ingersoll Rand centrifugal product line (CC) |
| Series | MSG TURBO-AIR / MSG Centac |
| Item-Level Model Code | P675 |
| Compressor 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, etc.) |
Representative Model Range for Centrifugal Series (family-level reference; individual compatibility must be verified by serial number)
| Series | Representative Models |
|---|---|
| MSG TURBO-AIR | TA / NX series 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 treatment for the above machines |
Why verification by part number is essential rather than by machine model
Centrifugal machines are supplied as project-based packages: the same machine may have different inlet assembly configurations, downstream treatment scope and interface dimensions in different projects; and the same machine has both inlet-stage and downstream clean-stage elements with different part numbers. Therefore selection should be based on: old part stamped number first, compressor nameplate second, installation position third.
Three-Step Verification Method
- Read the stamped part number on the old element's end cap or cage and compare with the ordered part number;
- Read the model and group identifier on the compressor nameplate and compare with that machine's parts manual;
- Confirm the old part's installation position (inlet stage / clean stage) — the two are not interchangeable.
If verification is still uncertain after these three steps, provide compressor nameplate photo, old part photo (including stamped part number) and installation position description. We will verify by part number reverse lookup.
Cross-Series Note: Centrifugal machine filter elements and oil-flooded screw machine filter elements belong to different part number systems and cannot be used across series. Screw machine air filters are dimensioned and interfaced for external inlet assemblies; direct substitution will cause seal failure.
Related Components
In the Ingersoll Rand centrifugal product line's inlet and air path system, components maintained on the same cycle or in the same section include:
| Component | Part Number | Function | Inspection Points |
|---|---|---|---|
| Sterile Filter Element | 47722478001 | Downstream sterile-grade filtration, further removing microorganisms and particles from compressed air for higher air quality requirements | 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, corrosion |
| Intake Depression Gauge / Differential Gauge | — | Displays inlet resistance; final criterion for replacement interval | Periodically check impulse line for blockage — blockage gives "false clean" readings |
| Seals | — | Ensure no bypass between element and assembly | Inspect with element; replace if compressed, hardened or missing |
| Compressor Lubricating Oil and Oil Filter | — | For gearbox and bearing lubrication system (not compression chamber oil) | Replace per compressor parts manual intervals; inspect together with inlet element |
Recommended Replacement Coordination: Inlet filter element, downstream clean filter element and seals should be inspected together, with replacement decisions made separately per their 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 together.
For Specific Part Numbers: Items marked "—" above should be referenced from the machine-specific parts manual — centrifugal machines are project-packaged, and listed component part numbers correspond to the applied machine's serial number and should not be used across projects.