Ingersoll Rand 47722477001 Air Filter Element | MSG TURBO-AIR / Centac

Product Overview

47722477001 is the inlet air filter element for Ingersoll Rand centrifugal air compressors. It mounts inside the intake filter assembly, upstream of the centrifugal impeller inlet. As ambient air is drawn in, dust, grit, and fibers are captured by the filter media before reaching the impeller and intercooler.

This part belongs to the Ingersoll Rand centrifugal product line (CC), with piece-level model code P675 and unit group identifier C675. Centrifugal units are designed as 100% oil-free (ISO 8573-1 Class 0). Because no lubricating oil carries contaminants away from the compression chamber, particles deposit directly on the impeller and cooler surfaces—making inlet filtration more critical than on oil-flooded screw compressors. Dust buildup on the high-speed impeller can shift dynamic balance, directly affecting rotor stability and maintenance costs.

Core Specifications

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
Unit 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 Parameters

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 classification (G4/F7) does not apply
Dust Holding Capacity	—

Flow and Pressure Drop

Parameter	Value / Note
Rated Air Flow	Must exceed unit rated inlet flow; size after correcting for discharge volume, inlet temperature, and altitude
Initial Pressure Drop	Approx. 0.3–0.5 kPa (clean element)
Operating Differential	Rises with dust loading; typical range approx. 0.5–1.5 kPa
Alarm / Final Resistance	Typical replacement threshold approx. 1.5–2.5 kPa; for centrifugal units the 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 unit energy consumption by approx. 1.0%

Pressure drop / energy relationship (theoretical, at 0.85 MPa discharge gauge pressure):

Inlet 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%

Over the life of one filter element, inlet resistance rises by more than 2 kPa, increasing unit energy consumption by approximately 2%. Centrifugal units are high-power and often run continuously, so this energy penalty frequently exceeds the filter price—making calendar-based extended use uneconomical.

Construction and Materials

Parameter	Value / Note
Filter Media	Cellulose fiber filter paper, 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, bonded to media
Seal	Polyurethane or NBR, integrated with end cap or separately mounted
Bonding	Polyurethane adhesive for media-to-end-cap and cage sealing

Operating Tolerance

Parameter	Value / Note
Operating Temperature	-10 °C to +80 °C
Relative Humidity	≤90% RH (non-condensing)
Burst / Collapse Pressure	Standard design withstands ≥5 kPa differential without deformation
Function	Inlet-stage filtration for oil-free centrifugal units; works with downstream clean filter element to maintain air quality

Service Life and Maintenance

Parameter	Value / Note
Service Life	2000 hours or 3 months, whichever comes first
High-Dust Environment	Shorten hours accordingly (e.g., approx. 1500 hours); time limit also earlier
Shelf Life	Use within 24 months; store dry, ventilated, away from light; avoid moisture and crushing
Replacement Criteria	Intake depression gauge exceeds limit, or media shows damage, debonding, or compressed seal face

Standards

Standard	Note
ISO 5011	Inlet air filter efficiency and dust holding capacity test method; basis for performance characterization
ISO 8573-1	Compressed air quality classes; these units are Class 0 (100% oil-free)
Note	ISO 2941 / 2942 / 2943 / 3723 / 3724 are hydraulic filter standards for pressure, burst, and filtration characteristics—not applicable to air filters; do not use as performance basis for air filter elements

Installation and Maintenance Steps

Step 1 — Confirm unit status and spare part. Check the unit nameplate model and group identifier; confirm the new filter matches the old part number. Gather new filter, lint-free cloth, and necessary tools.

Step 2 — Shut down, depressurize, lock out. Follow shutdown procedure; wait for full depressurization (centrifugal units have rotational inertia—wait until the controller confirms zero speed). Disconnect main power and apply lockout/tagout. This is mandatory.

Step 3 — Verify old part before removal. Before opening the intake filter assembly, read the stamped part number on the old filter end cap and note its installation position; confirm it matches the new part. Centrifugal units use different part numbers for inlet-stage and clean-stage filters—this step prevents errors.

Step 4 — Remove old element and inspect. Lift out the old element vertically; observe dust distribution and media condition. Replace immediately if media is damaged, perforated, end cap debonded, or seal face compressed—even if service interval has not been reached. Black oily sludge on the surface indicates abnormal oil mist in the 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 into the assembly—this drives dust into the intake. Criterion: no loose dust on walls; seal face flat and clean.

Step 6 — Install new element.

Insert in the same orientation and position as the old element; note seal face direction and compression method. Criterion: no movement after seating; seal face evenly compressed around circumference.

Step 7 — Reassemble and confirm seal. Reinstall cover or clamp; tighten evenly per unit requirements. Check that the intake depression gauge impulse line is clear—a blocked line gives a false "clean" reading and is a common misdiagnosis source.

Step 8 — Reset, test run, record. Reset maintenance timer; start unit unloaded; observe intake depression gauge and operating sound. Criterion: gauge stable within unit limits; no abnormal whistling (often indicates seal bypass). Record unit running hours at replacement as the starting point for the next interval.

FAQ

Q1: Which models 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, unit group identifier C675). Centrifugal units are 100% oil-free. For a specific unit, always verify with the nameplate and old part number.

Q2: Can it be used on oil-flooded screw compressors?

Not recommended. This element belongs to the centrifugal product line; its dimensions and connections are designed for centrifugal intake assemblies. Oil-flooded screw compressors use a different part number system—mixing will not ensure proper 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), shorten to approx. 1500 hours. The final criterion is the intake depression gauge—replace when reading exceeds limit, regardless of running hours.

Q4: Why is inlet filtration more critical on centrifugal compressors than screw compressors?

Centrifugal units are oil-free; no lubricating oil carries contaminants away from the compression chamber. Particles deposit on the high-speed impeller and intercooler surfaces. Impeller fouling shifts dynamic balance and requires shutdown for rotor correction. Screw compressors have an oil film that partially carries away contaminants, so inlet filtration tolerance is higher.

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 buyers. We recommend measuring the old element's OD, ID, overall height, and seal type, or providing photos and unit nameplate—we will cross-reference by part number before confirming.

Q6: What are the consequences of increased inlet resistance?

First, energy consumption rises: each 1 kPa increase in inlet resistance raises compression ratio by approx. 1% and unit energy consumption by approx. 1%. Second, inlet air volume drops, reducing discharge volume. Continuing past the replacement threshold saves less on filter cost than the extra electricity consumed.

Q7: Can I use an alternative part?

Yes, but verify three items: filtration rating, end cap seal type, and dimensions. If an alternative's seal type does not match the original, bypass occurs—on an oil-free centrifugal unit, bypass means particles directly enter the impeller, a higher risk than on oil-flooded units. When purchasing alternatives, provide old element photos and this part number.

Q8: What 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: 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 pressure. Moisture reduces media strength; compression deforms the seal fit. Use within 24 months.

Q10: Which filters in the same series are easily confused?

In the Ingersoll Rand centrifugal product line, a single unit often has both an inlet-stage filter and a downstream clean-stage filter—different part numbers and installation positions. Before ordering, confirm whether it is the inlet stage or clean stage; filtration rating, materials, and seal types differ.

Compatible Models

This element applies to Ingersoll Rand centrifugal air compressors as follows:

Item	Content
Unit Type	Centrifugal air compressor
Product Line	Ingersoll Rand centrifugal (CC)
Series	MSG TURBO-AIR / MSG Centac
Piece-Level Model Code	P675
Unit Group Identifier	C675
Air Quality	100% oil-free, ISO 8573-1 Class 0
Typical Applications	Continuous clean oil-free air (food & beverage, pharmaceutical, electronics, textile, pneumatic conveying)

Representative model families (family-level reference; individual fit 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, etc.
Packaged Systems	Refrigerated dryers, filters, air receivers for above units

Why verify by part number, not unit model: Centrifugal units are supplied as project-specific packages; intake assembly configuration, downstream scope, and connection dimensions can differ between projects. A single unit also has two filter stages—inlet and downstream clean—with different part numbers. Always verify by the old element's part number first, unit nameplate second, and installation position third.

Three-Step Verification

1. Read the stamped part number on the old element's end cap or cage; compare with the ordered part number.
2. Read the model and group identifier on the unit nameplate; compare with the unit parts manual.
3. Confirm the old element's installation position (inlet stage / clean stage)—the two are not interchangeable.

If still uncertain, provide unit nameplate photo, old element photo (with stamped part number), and installation position description. We will cross-reference by part number and confirm.

Cross-series note: Centrifugal and oil-flooded screw compressor filters belong to different part number systems and are not interchangeable. Screw compressor air filters are sized for external intake assemblies; direct substitution will cause seal failure.

Related Parts

Components in the same maintenance cycle or air path for Ingersoll Rand centrifugal product lines:

Component	Part Number	Function	Inspection Points
Sterile Filter Element	47722478001	Downstream sterile-grade filtration; further removes microorganisms and particles for higher air quality requirements	Different filtration stage from inlet filter; part numbers not interchangeable; confirm position at replacement
Air Filter Assembly (Housing)	—	Houses and secures inlet filter element	Check clamps, seal faces, and outlet for deformation or corrosion
Intake Depression / Differential Gauge	—	Displays inlet resistance; final replacement criterion	Regularly check impulse line for blockage; blockage gives false "clean" reading
Seals	—	Prevents bypass between element and assembly	Inspect with filter; replace if compressed, hardened, or missing
Unit Lubricating Oil and Oil Filter	—	For gearbox and bearing lubrication (not compression chamber)	Replace per unit parts manual interval; inspect with inlet filter

Recommended coordinated replacement: Inspect inlet filter, downstream clean filter, and seals together; decide replacement separately based on each component's criteria. Inlet and downstream clean filters have different intervals (downstream typically judged by cleanliness requirement rather than dust load) and need not be replaced simultaneously.

For specific part numbers: Items marked "—" above should be referenced from the unit's parts manual. Centrifugal units are project-specific; manual part numbers correspond to unit serial numbers and should not be applied across projects.