Product
Ingersoll Rand 47722477001 Centrifugal Compressor Air Filter Element
Ingersoll Rand 47722477001 intake air filter element for MSG TURBO-AIR / MSG Centac centrifugal compressors (model code P675, group C675). 5–10 μm filtration, ≥98% efficiency, cellulose media, -10 to +80 °C. Replace at 2000 hours or 3 months.
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Overview
47722477001 is the intake air filter element for Ingersoll Rand centrifugal air compressors. It installs inside the intake filter assembly, upstream of the centrifugal impeller. Because the impeller is a high-speed rotating component, dust loading can shift dynamic balance; intake filtration directly affects rotor stability and maintenance cost.
This part belongs to the Ingersoll Rand centrifugal product line (CC). The piece-level model code is P675, and the compressor group identifier is C675. Centrifugal compressors are designed as 100% oil-free (ISO 8573-1 Class 0). With no lubricating oil in the compression chamber to carry away contaminants, particles deposit on the impeller and intercooler surfaces, so intake filtration requirements are higher than for oil-flooded screw compressors.
| Item | Value |
|---|---|
| Part number | 47722477001 |
| Product name | Air Filter Element |
| Brand | Ingersoll Rand |
| Application | Ingersoll Rand centrifugal compressors (MSG TURBO-AIR / MSG Centac series) and packaged systems |
| Piece-level model code | P675 |
| Group identifier | C675 |
| 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 / note |
|---|---|
| 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 classes such as G4/F7 do not apply |
| Dust holding capacity | — |
Flow and pressure drop
| Parameter | Value / note |
|---|---|
| Rated air flow | Must exceed compressor rated intake flow; select based on discharge flow corrected for intake temperature and altitude |
| Initial pressure drop | Approx. 0.3–0.5 kPa (clean element) |
| Operating differential | 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; on centrifugal compressors 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 compressor energy consumption by approx. 1.0% |
Pressure drop vs. energy (theoretical, at 0.85 MPa discharge gauge pressure)
| Intake 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, intake resistance rises by more than 2 kPa and compressor energy consumption increases by roughly 2%. Centrifugal compressors are high-power and often run continuously, so this energy difference usually exceeds the filter price. Operating beyond the resistance limit is not economical.
Structure, dimensions and installation
| Parameter | Value / note |
|---|---|
| Overall dimensions | — (measure the old part) |
| Effective filtration area | — (measure the old part) |
| Pleat count / pitch | — (measure the old part) |
| Mounting interface | Matches the intake filter assembly; compare with old part |
| Seal type | Face seal or radial seal; compare with old part |
Recommended measurements before ordering a replacement
| Measurement | Note |
|---|---|
| Outer diameter | Outer edge of the filter media |
| Inner diameter | Center bore diameter |
| Overall height | Including end caps |
| Seal location and type | Face or radial, and seal cross-section |
| Mounting interface | Clamp, bolt holes or quick-fit type and dimensions |
Length, diameter and seal type directly affect fit and bypass. Do not rely on compressor model alone.
Materials
| Parameter | Value / note |
|---|---|
| Filter media | Cellulose (wood pulp fiber) filter paper, pleated |
| Media weight | Approx. 130 g/m² |
| Inner/outer support | Galvanized steel perforated cage, supporting media on both sides |
| End caps | Metal or polyurethane, bonded to media |
| Seal | Polyurethane or NBR, integral with or separate from end caps |
| Adhesive | Polyurethane, for bonding media to end caps and cage |
Operating limits
| Parameter | Value / note |
|---|---|
| Operating temperature | -10 °C to +80 °C |
| Relative humidity | ≤90% RH, non-condensing |
| Burst / collapse pressure | Designed to withstand at least 5 kPa differential without deformation |
| Special function | Intake-stage filtration for oil-free centrifugal compressors, working with downstream clean filtration to maintain air quality |
Service life and maintenance
| Parameter | Value / note |
|---|---|
| Service life | 2000 hours or 3 months, whichever comes first |
| High-dust environment | Reduce hours accordingly (e.g. approx. 1500 hours) and shorten the time limit |
| Shelf life | Use within 24 months; store dry, ventilated and away from light; avoid moisture and crushing |
| Replacement criteria | Intake depression gauge reading exceeds limit, or media damage, debonding, or compressed seal face |
Standards
| Standard | Note |
|---|---|
| ISO 5011 | Test method for intake filter efficiency and dust holding capacity; basis for performance characterization of this air filter element |
| ISO 8573-1 | Compressed air quality classes; the compressor is Class 0 (100% oil-free) |
| Note | ISO 2941 / 2942 / 2943 / 3723 / 3724 are hydraulic filter standards and do not apply to air filter elements; do not use them as performance criteria |
Installation and Maintenance
- Confirm compressor status and spare parts. Check the nameplate model and group identifier; confirm the new element matches the old part number. Have the new element, lint-free cloth and tools ready.
- Shut down, depressurize and lock out. Follow the shutdown procedure and wait until the compressor is fully depressurized (centrifugal compressors have rotational inertia; wait for the controller to confirm zero speed). Disconnect main power and apply lockout/tagout. This step is mandatory.
- Verify the old part before disassembly. Read the stamped part number on the old element end cap and note its position; confirm it matches the new part. Intake and clean sections use different part numbers on centrifugal compressors; this step prevents errors.
- Remove and inspect the old element. Lift out vertically and check dust distribution and media condition. Replace immediately if media is damaged, punctured, debonded or the seal face is compressed, even if the service interval has not been reached. If the outer surface has black oily sludge, investigate upstream oil mist (especially important on oil-free compressors).
- Clean the assembly interior. Wipe the inner walls and bottom with a lint-free cloth. Do not blow compressed air into the assembly (it drives dust into the intake). Criteria: no loose dust, seal face flat and clean.
- Install the new element. Fit in the same orientation and position as the old part; note seal face direction and clamping method. Criteria: no movement after seating, seal face evenly compressed around the circumference.
- 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 line gives a false clean reading and is a common source of misjudgment.
- Reset, test run and record. Reset the maintenance timer, start the compressor unloaded and observe the intake depression gauge and running sound. Criteria: gauge stable within allowed range, no abnormal whistling (often indicates seal bypass). Record compressor running hours as the start of the next interval.
FAQ
Q1: Which compressors use 47722477001?
It is used on Ingersoll Rand centrifugal air compressors (MSG TURBO-AIR and MSG Centac series and packaged systems; piece-level model code P675, group identifier C675). Centrifugal compressors are 100% oil-free. For a specific unit, confirm against the compressor nameplate and the old part number.
Q2: Can it be used on an oil-flooded screw compressor?
Not recommended. This element belongs to the centrifugal product line and its dimensions and interface are designed for centrifugal intake assemblies. Oil-flooded screw compressors use a different part number system; mixing them cannot guarantee sealing or filtration.
Q3: What is the replacement interval?
Standard interval is 2000 hours or 3 months, whichever comes first. In high-dust environments (cement, quarry, mining, metalworking) reduce to approx. 1500 hours. The intake depression gauge reading is the final criterion; replace when it exceeds the limit regardless of running hours.
Q4: Why do centrifugal compressors require higher intake filtration than screw compressors?
Centrifugal compressors are oil-free; 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 fouling causes dynamic imbalance and requires shutdown for rotor correction. Screw compressors have an oil film that can carry away some contaminants, so intake filtration tolerance is higher.
Q5: Why are dimensions not listed?
Centrifugal compressors are supplied as project-specific packages; intake assembly dimensions vary between groups and package scopes within the same series, so listing a single size can be misleading. Measure the old part's outer diameter, inner diameter, overall height and seal type, or provide photos and the compressor nameplate so we can verify by part number.
Q6: What are the consequences of higher intake resistance?
First, energy consumption rises: each 1 kPa increase in intake resistance raises compression ratio by approx. 1% and compressor energy consumption by approx. 1%. Second, intake flow decreases, reducing compressor discharge flow. Continuing to use a filter past its replacement threshold costs more in electricity than the filter itself.
Q7: Can I use an aftermarket replacement?
Yes, but verify three points: filtration rating, end cap seal type and dimensions. If the seal type does not match the original, bypass can occur. On an oil-free centrifugal compressor, bypass means particles enter the impeller directly, a higher risk than on oil-flooded units. Provide photos of the old part and this part number when sourcing alternatives.
Q8: What should I do 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 compressor immediately and check: element seating, seal face for 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 place; avoid moisture, rain and heavy loads. Moisture reduces media strength; crushing deforms the seal fit. Use within 24 months.
Q10: Which other filters in the same series are easily confused?
In the Ingersoll Rand centrifugal product line, the same compressor often has both intake and downstream clean filter elements with different part numbers and installation positions. Always confirm whether the element is for the intake or clean section; filtration rating, materials and seal type differ.
Compatible Models
This element is for Ingersoll Rand centrifugal air compressors:
| Item | Content |
|---|---|
| Compressor type | Centrifugal air compressor |
| Product line | Ingersoll Rand centrifugal (CC) |
| Series | MSG TURBO-AIR / MSG Centac |
| Piece-level model code | P675 |
| 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 families (family-level reference; individual fit must be checked 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 compressors |
Why verify by part number instead of compressor model
Centrifugal compressors are supplied as project-specific packages: the same compressor model may have different intake assembly configurations, downstream scope and interface dimensions in different projects. The same compressor also has intake and downstream clean filter elements with different part numbers. Therefore, selection should be based primarily on the old part number, secondarily on the compressor nameplate, and thirdly on the installation position.
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 model and group identifier on the compressor nameplate and compare with the unit parts manual.
- Confirm the old part's installation position (intake or clean section); the two are not interchangeable.
If these three steps do not confirm fit, provide photos of the compressor nameplate, the old part (including stamped part number) and the installation position. We will verify by part number.
Cross-series note: centrifugal compressor filter elements and oil-flooded screw compressor filter elements belong to different part number systems and are not interchangeable. Screw compressor air filters are designed for external intake assemblies; direct substitution will cause seal failure.
Related Parts
Components in the intake and air system of the Ingersoll Rand centrifugal product line that are maintained on the same interval or in the same section:
| Component | Part number | Function | Inspection points |
|---|---|---|---|
| Sterile filter element | 47722478001 | Downstream sterile-grade filtration, further removing microorganisms and particles from compressed air for higher cleanliness requirements | Different filtration section from intake element; part numbers are not interchangeable. Confirm installation position when replacing. |
| Air filter assembly (housing) | — | Houses and secures the intake filter element | Check clamps, seal faces and outlet for deformation or corrosion |
| Intake depression gauge / differential pressure gauge | — | Indicates intake resistance; final criterion for replacement | Periodically check impulse line for blockage; blockage gives a false clean reading |
| Seals | — | Prevent bypass between element and assembly | Inspect together with element; replace if compressed, hardened or missing |
| Compressor oil and oil filter | — | For gearbox and bearing lubrication (not compression chamber) | Replace per unit parts manual; inspect together with intake element |
Recommended replacement practice: inspect intake element, downstream clean element and seals together, and decide each based on its own criteria. Intake and downstream clean elements have different replacement intervals (downstream is usually judged by cleanliness requirements rather than dust loading) and need not be replaced together.
For specific part numbers: items marked "—" should be taken from the unit parts manual. Centrifugal compressors are project-specific; part numbers listed in the manual correspond to the unit serial number and should not be applied across projects.