Product
Ingersoll Rand 47722477001 Air Filter Element | Centrifugal Compressor Intake
Ingersoll Rand 47722477001 intake air filter element for MSG TURBO-AIR and MSG Centac centrifugal compressors. 5–10 μm filtration, ≥98% efficiency, 2000-hour or 3-month service interval. 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 installs inside the intake filter assembly, upstream of the centrifugal impeller inlet. As the machine draws in ambient air, 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 compressor — the impeller downstream 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 (product line code CC), with a piece-level model code of P675 and a machine group identifier of 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 settle on the impeller and cooler surfaces, so intake filtration requirements are higher than for oil-flooded rotary 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 interval | 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 Pressure Drop
| Parameter | Value / Notes |
|---|---|
| Rated air flow | Must exceed machine rated intake volume; match after correcting for discharge volume, intake temperature, and altitude |
| Initial pressure drop | Approx. 0.3–0.5 kPa with a clean new element |
| Operating differential range | Rises gradually 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 intake depression gauge reading is the final criterion |
| Pressure drop vs. energy | Each 1 kPa increase in intake resistance raises the compression ratio by approx. 1% and machine energy consumption by approx. 1.0% |
Pressure drop and energy relationship (theoretical, 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 increases by roughly 2%. Centrifugal machines are high-power and typically run continuously, so this energy gap often exceeds the cost of the element itself. Running past the resistance limit rather than the calendar limit is not economical.
Construction and Installation
| Parameter | Value / Notes |
|---|---|
| Overall dimensions | — (verify by measuring the existing part) |
| Effective filtration area | — (verify by measuring the existing part) |
| Pleat count / pitch | — (verify by measuring the existing part) |
| Mounting interface | Mates with the intake filter assembly; compare against the old part |
| Sealing type | Face seal or radial seal; compare against the old part |
Measurements to take before ordering a replacement
| Measurement | Notes |
|---|---|
| Outer diameter | Outer edge diameter of the filter media |
| Inner diameter | Center passage diameter |
| Overall height | Total height including end caps |
| Seal position and type | Face or radial, plus seal cross-section shape |
| Mounting interface | Clamp, bolt hole, or quick-fit configuration and dimensions |
Length, diameter, and seal type directly determine whether the element fits and whether bypass occurs. Do not substitute the machine model for actual measurements.
Materials
| 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 cages supporting the media on both sides |
| End caps | Metal or polyurethane end caps bonded to the media |
| Seals | Polyurethane or nitrile rubber seal, integrated with or separate from the end cap |
| Bonding | Polyurethane adhesive for media-to-end-cap and cage fixing and edge sealing |
Operating Limits
| Parameter | Value / Notes |
|---|---|
| Operating temperature | -10 °C to +80 °C |
| Relative humidity | ≤90% RH (non-condensing) |
| Burst / collapse resistance | Standard design withstands not less than 5 kPa differential across the media without deformation |
| Special function | Intake-stage filtration for oil-free centrifugal machines; works 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 environments | Reduce hours accordingly (e.g., approx. 1500 hours); shorten the calendar limit as well |
| Storage shelf life | Use within 24 months; store in a dry, ventilated, dark place away from moisture and compression deformation |
| 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 | The ISO 2941 / 2942 / 2943 / 3723 / 3724 series often cited for replacement parts are hydraulic filter standards covering pressure resistance, burst resistance, and filtration characteristics. They do not apply to air filter elements and should not be used as performance evidence for air filters. |
Standard Maintenance and Installation Steps
Step 1: Confirm machine status and spare 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 for the machine to fully depressurize (centrifugal machines have rotational inertia — wait for the controller to confirm zero speed). Isolate the main power supply and apply lockout/tagout. This step is mandatory and must not be skipped.
Step 3: Verify the old part before starting work
Before opening the intake filter assembly, read the stamped part number on the old element end cap and note its installation position. Confirm it matches the purchased part before proceeding. On centrifugal machines, the intake-stage and clean-stage elements carry different part numbers; this step is the key error-prevention check.
Step 4: Remove and inspect the old element
Lift out the old element vertically and examine the dust distribution and media condition. Criteria: if the media is damaged, punctured, debonded from the end cap, or the seal face is flattened, replace it immediately 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 (a priority check on oil-free machines).
Step 5: Clean the assembly interior
Wipe the inner walls and base with a lint-free cloth. Do not blow compressed air forcefully into the assembly interior — this 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
Install in the same orientation and position as the old element, noting seal face direction and clamping method. Criteria: the element seats without movement and the seal face is evenly compressed around its circumference.
Step 7: Reassemble and confirm sealing
Refit the cover plate or clamp and tighten evenly per machine requirements. Check that the intake depression gauge impulse line is clear — a blocked impulse line gives a falsely 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: the gauge holds steady within the machine's allowable range and there is no abnormal whistling (whistling often indicates seal bypass). Record the machine running hours at this change as the starting point for the next interval.
FAQ
Q1: Which machines use 47722477001?
It is used on Ingersoll Rand centrifugal air compressors — the MSG TURBO-AIR and MSG Centac series and their packaged systems (piece-level model code P675, machine 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 fitted to an oil-flooded rotary screw compressor?
Not recommended. This element belongs to the centrifugal product line, and its dimensions and interface are designed for centrifugal machine 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 replacement interval?
The standard interval is 2000 hours or 3 months, whichever comes first. In high-dust environments (cement, quarrying, mining, metalworking), shorten the hours to approximately 1500. The final criterion is the machine intake depression gauge reading — replace when the reading exceeds the limit, regardless of running hours.
Q4: Why are intake filtration requirements higher for centrifugal machines than screw compressors?
Centrifugal machines are oil-free by design, so there is no lubricating oil in the compression chamber to carry contaminants away; particles settle on the high-speed impeller and intercooler surfaces. Deposits on the impeller cause dynamic balance shift, which requires a shutdown and rotor correction to resolve. Screw compressors have an oil film that can carry some contaminants away, giving more tolerance in intake filtration.
Q5: Why are dimensions not listed?
Centrifugal machines are supplied as project-based packages, and intake assembly dimensions vary between groups and package scopes within the same series. Listing a single dimension would be misleading for procurement. We recommend measuring the old part's outer diameter, inner diameter, overall height, and seal type, or providing photos of the old part and the machine nameplate so we can cross-reference by part number.
Q6: What happens when intake resistance rises?
First, energy consumption increases: each 1 kPa increase in intake resistance raises the compression ratio by about 1% and machine energy consumption by about 1%. Second, intake volume drops, reducing machine discharge volume. Continuing to run past the replacement threshold saves less on the element than the extra electricity consumed.
Q7: Can alternative parts be used?
Yes, but three items must be verified: filtration rating, end cap seal type, and dimensions. If an alternative's seal type does not match the original design, bypass occurs — and for an oil-free centrifugal machine, bypass means particles go directly to the impeller, a higher risk than on oil-flooded machines. When sourcing alternatives, provide photos of the old part and this part number.
Q8: What should be done if abnormal whistling occurs after installation?
Whistling usually indicates seal bypass — the element is not fully seated, the seal face is deformed, or the seal is missing. Shut down immediately and recheck: whether the element is seated, and whether the seal face is flattened or rolled. Also check the intake depression gauge impulse line for blockage to avoid misdiagnosis.
Q9: What are the storage requirements for spare parts?
Store in a dry, ventilated, dark place away from moisture, rain, and heavy compression. Moisture reduces media strength, and compression deformation damages the sealing fit. Use within 24 months.
Q10: Which other elements in the same series are easily confused with this one?
In the Ingersoll Rand centrifugal product line, the same machine often carries both an intake-stage element and a downstream clean-stage element, with different part numbers and installation positions. Before ordering, confirm whether the position is intake stage or clean stage — the two differ in filtration rating, materials, and seal type.
Compatible Machines
This part is for 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 |
| Piece-level model code | P675 |
| Machine group identifier | C675 |
| Air quality class | 100% oil-free, ISO 8573-1 Class 0 |
| Typical applications | Processes requiring continuous, clean, oil-free air (food and beverage, pharmaceutical, electronics, textile, pneumatic conveying, etc.) |
Representative centrifugal series (family-level reference; individual fitment 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 machines |
| Packaged systems | Refrigerated dryers, filters, air receivers, and other downstream treatment for the above machines |
Why part number verification is required instead of model-based selection
Centrifugal machines are supplied as project-based packages: the same machine may have different intake assembly configurations, downstream treatment scope, and interface dimensions across projects. The same machine also carries 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 installation position.
Three-step verification method
- Read the part number stamped on the old element end cap or cage and compare it with the part number being purchased;
- Read the model and group identifier on the machine nameplate and compare with the machine parts manual;
- Confirm the old part's installation position (intake stage / clean stage); the two are not interchangeable.
If these three steps do not confirm fitment, provide a photo of the machine nameplate, a photo of the old part (including the stamped part number), and a note on installation position. We will cross-reference by part number before confirming.
Cross-series note: filter elements for centrifugal machines and for oil-flooded screw compressors belong to different part number systems and cannot be used across series. Screw compressor air filters are dimensioned and interfaced for the machine's external intake assembly, and direct substitution will cause seal failure.
Related Parts
In the intake and air path system of the Ingersoll Rand centrifugal product line, the following parts are maintained on the same cycle or in the same section:
| Part | Part number | Function | Inspection points |
|---|---|---|---|
| Sterile filter element | 47722478001 | Downstream sterile-grade filtration element, further removing microorganisms and particles from compressed air for higher air-quality requirements | Belongs to a different filtration stage from the intake element; part numbers are not interchangeable. Confirm installation position when replacing. |
| Air filter assembly (housing) | — | Housing assembly that carries and secures the intake filter element | Check clamps, seal faces, and outlet end for deformation or corrosion |
| Intake depression gauge / differential gauge | — | Displays intake resistance and is the final criterion for the replacement interval | Periodically check the impulse line for blockage — blockage gives a falsely clean reading |
| Seals | — | Prevent bypass between the element and the 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 of centrifugal machines (not compression chamber oil) | Replace per the machine parts manual interval; inspect together with the intake element |
Recommended replacement practice: inspect the intake element, downstream clean element, and seals together, and decide on replacement separately according to each item's criteria. The intake element and downstream clean element have different intervals (the downstream part is usually judged by cleanliness requirements rather than dust loading), so they do not need to be replaced on the same schedule.
When specific part numbers are needed: for items marked "—" above, refer to the parts manual supplied with the specific machine. Centrifugal machines are packaged per project, and the companion part numbers listed in the manual correspond to the serial number of the applied machine; they should not be applied across projects.