Product
Ingersoll Rand 67754101 Centac Inlet Air Filter Element | 5.4 kg
Ingersoll Rand 67754101 inlet air filter element for Centac, Centac C and CN centrifugal compressors. 5–10 μm filtration, ≥98% efficiency, approx. 5.4 kg net. Verify fitment by machine serial number before ordering.
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Product Overview
67754101 is the inlet air filter element (Element, Inlet Air Filter) for Ingersoll Rand Centac centrifugal air compressors. It installs inside the inlet filter housing, upstream of the inlet guide vanes and the first-stage impeller.
Because a centrifugal compressor accelerates air through a high-speed impeller, the air must be clean before it reaches the first stage. This element is the particle barrier that protects the impeller blades and the intercooler passages. The Centac is a 100% oil-free machine: there is no lubricating oil in the compression path to carry contaminants away, so dust that passes the filter deposits on the impeller, diffuser and intercooler tube bundles. Fouling on the impeller affects dynamic balance and aerodynamic efficiency; fouling in the intercooler raises interstage temperature and reduces overall efficiency.
This element is notably larger and heavier than a typical screw compressor air filter: approximately 5.4 kg (11.94 lb) net, two to three times the weight of a standard rotary screw element (usually 1–3 kg). That reflects the high inlet volumes of Centac machines, where a larger filtration area is required to keep face velocity and pressure drop low.
Key Specifications
| Item | Value |
|---|---|
| Part number | 67754101 |
| Description | Element, Inlet Air Filter |
| Brand | Ingersoll Rand |
| Compatible machines | Centac, Centac C series, CN series centrifugal compressors |
| Manual reference | 1X9428 |
| Type | Dry disposable inlet element |
| Net weight | Approx. 5.4 kg (11.94 lb) |
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% (for particles ≥5 μm) |
| Recommended change interval | Approx. 2,000 hours, or per the inlet differential pressure gauge |
Fitment confirmation: The Centac range spans many models (C400–C3000 and larger), and filter configuration varies by model and build. Accurate fitment must be confirmed against the machine nameplate and serial number via the Centac parts catalogue, or by supplying a nameplate photo for cross-check.
Similar part number alert: The same Centac parts list also carries 67765362 (Intake Air Filter Core). The names are similar but the part numbers differ. Always read the number on the old element itself rather than ordering by description.
Technical Parameters
Filtration performance
| Parameter | Value / note |
|---|---|
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% (for particles ≥5 μm) |
| Filter class | HVAC classification (EN 779) does not apply; centrifugal inlet elements are characterised per ISO 5011 by efficiency, inlet restriction and dust holding capacity |
Centac impellers run at high speed with narrow blade passages, so particles strike the impeller at far higher relative velocity than in a screw rotor. Erosion from a given particle size is more significant, and once the intercooler tube bundle fouls, cleaning requires a shutdown and dismantling.
Flow and restriction
| Parameter | Value / note |
|---|---|
| Initial pressure drop | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Alarm / final restriction | Determined by the machine inlet differential pressure gauge |
| Restriction vs. energy | Rising inlet restriction lowers inlet air density; the machine draws more power to hold pressure and flow, raising specific power |
Because the Centac is a centrifugal machine, its output depends on inlet air density. As the element loads with dust, inlet pressure and density fall, and the machine must increase speed or power to maintain set discharge pressure and flow. On a large continuously running unit, that energy penalty over a year typically exceeds the cost of the element itself — which is why Ingersoll Rand fits an inlet differential pressure indicator.
Construction and installation
| Parameter | Value / note |
|---|---|
| Type | Cylindrical element, fitted into the inlet filter housing |
| Net weight | Approx. 5.4 kg (11.94 lb) |
| Mounting | Fitted into the Centac inlet filter housing, axial face compression seal |
| Sealing | Face seal (axial compression) |
Materials
| Parameter | Value / note |
|---|---|
| Media | Imported wood-pulp filter paper (industry-common HV or Ahlstrom media) |
| Media weight | Approx. 130 g/m² |
| Support | Galvanised perforated steel inner cage and outer guard |
| End caps | Metal end caps (galvanised steel) with polyurethane bonding |
| Seal | NBR (nitrile) gasket |
| Adhesive | Polyurethane (PU) hot-melt |
Operating limits and service life
| Parameter | Value / note |
|---|---|
| Operating temperature | −10 to +100 °C |
| Relative humidity | ≤80% RH, no condensation |
| Burst strength | Media burst strength approx. 200–400 kPa (per ISO 2758) |
| Collapse resistance | Element must withstand the machine alarm differential pressure without collapsing |
| Service life | Approx. 2,000 hours |
| Actual change interval | Per the inlet differential pressure gauge; shorten in coastal (salt mist), desert (fine dust) or industrial (process dust) environments |
| Storage life | Approx. 2–3 years, unopened, dry and ventilated |
Applicable standards
| Item | Detail |
|---|---|
| Product standard | ISO 5011 (inlet air filters for internal combustion engines and compressors — performance testing), covering efficiency, inlet restriction and dust holding capacity |
| Other commonly cited standards | ANSI/CAGI ADF 400-1999 (compressed air and gas), ISO 8573-4 (compressed air — measurement of solid particles) |
| Standards often quoted in the trade | ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968 |
| Note on applicability | The ISO 29xx / 37xx series are general test methods for hydraulic fluid power filter elements. If a supplier can only offer hydraulic filter standards, request ISO 5011 data or the OEM specification sheet. |
| Oil-free context | The Centac machines this element serves are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first safeguard maintaining that rating |
Installation and Maintenance Steps
Centrifugal machines differ from screw compressors: the impeller has significant rotational inertia, so the controller must confirm zero speed. Allow 40–60 minutes per job. The element weighs approx. 5.4 kg, so plan safe lifting and support; two people or mechanical assistance may be needed depending on housing size.
- Stop the machine, confirm zero speed, lock out/tag out. Wait for the controller to confirm zero speed (do not judge by sound). Isolate the main power and apply lockout/tagout. Criterion: controller shows zero speed, no coasting noise.
- Open the inlet filter housing. The housing sits upstream of the inlet guide vanes. Release the cover clamps or fasteners evenly in a diagonal sequence. Criterion: on large housings, support the cover before the last fastener is released.
- Remove the old element and inspect the housing for dust trails. Pull out the element, supporting its weight to avoid crushing the media. Look for dust tracks on the inner housing wall — these indicate seal bypass, meaning unfiltered air has passed the seal. Criterion: no dust tracks means the seal was sound.
- Clean the housing and sealing face. Wipe the inner wall, base and sealing face with a dry lint-free cloth. Do not blow compressed air into the housing interior, as this drives dust into the intake path. Criterion: no loose dust, sealing face flat with no pits or corrosion.
- Verify the new element. Compare against the old part: part number, dimensions, seal integrity, undamaged media. Criterion: part number and dimensions must match before installation.
- Fit the new element and confirm seating. Place the 67754101 into the housing and confirm it is fully seated, the sealing face is in contact with no trapped material, and the element is centred. Criterion: even compression marks around the sealing face.
- Refit the cover and check the differential pressure sensing lines. Refit the cover and tighten evenly in a diagonal sequence. Before start-up, confirm the inlet differential pressure sensing lines are clear, not blocked and not frozen. A blocked line gives a falsely clean reading and lets the element run past its service life.
- Start per the centrifugal start-up procedure and verify. Start the machine per its procedure. Once stable, read the inlet differential pressure; it should return to the clean-element baseline. Listen for air leaks at the housing. Criterion: normal differential pressure, no abnormal noise; record date, running hours and reading.
Centrifugal-specific rule: seal bypass is more damaging on a centrifugal machine. A screw compressor still has oil to carry some particles away; the Centac compression path is oil-free, so particles all deposit on the impeller and coolers — a single seal failure can mean an impeller dynamic balance correction.
FAQ
Which machines use 67754101?
Ingersoll Rand Centac centrifugal air compressors: Centac, Centac C series and CN series. The Centac range is broad, so exact fitment requires the machine nameplate and serial number.
How do I know when to replace it?
Two ways: read the machine inlet differential pressure gauge (most reliable, reflects actual dust loading), or use the 2,000-hour interval as a reference. The gauge takes priority — dust loading varies widely by site, so a fixed interval either wastes element life or runs it too long.
How much does a loaded element affect centrifugal efficiency?
Rising inlet restriction lowers inlet density, so the machine draws more power to hold pressure and flow, raising specific power. On a large continuously running Centac, that energy cost over a year typically exceeds the element cost.
Can I blow it clean and reuse it?
No. This is a dry disposable element and is not designed to be cleaned. Reverse-blowing with compressed air damages the media structure and creates invisible channels that let unfiltered air pass — worse than not changing it at all.
What else should be checked when changing the element?
The inlet guide vane linkage, intake silencer, intercooler tube bundles and housing sealing face. On water-cooled machines, also check the water side of the coolers, which directly affects interstage temperature. Always confirm the differential pressure sensing lines are clear.
Can this element be interchanged with a screw compressor air filter?
No. At approx. 5.4 kg net it is two to three times the weight of a screw compressor element, and its dimensions, filtration area and restriction characteristics are designed for the high inlet volumes of a centrifugal machine.
Are 67754101 and 67765362 the same part?
No. Both names include "inlet air filter" (67754101 = Element, Inlet Air Filter; 67765362 = Intake Air Filter Core), but the part numbers differ. Read the number on the old element before ordering.
How do I confirm dimensions?
Measure the old element (outside diameter, inside diameter and height) or request a specification drawing from Ingersoll Rand. Do not cross-reference by weight or appearance alone.
Is it in stock and what is the lead time?
Regular stock items ship within 24 hours. Southeast Asia approx. 3–7 days; Middle East approx. 7–10 days; Africa and Latin America approx. 10–18 days; Russia/Belarus approx. 10–15 days. Confirm at quotation based on stock and sailing schedule.
How do I confirm the part number 100%?
Three steps: check the machine nameplate to confirm it is a Centac series; provide the serial number for cross-check against the centrifugal parts catalogue; read the part number on the old element. The third step is the most reliable.
Compatible Machine Models
This part number fits Ingersoll Rand Centac centrifugal air compressors:
| No. | Compatible model | Note |
|---|---|---|
| 1 | Centac | Main centrifugal series, multi-stage, multi-pinion gear-driven design |
| 2 | Centac C series | Common models include C400, C700, C700e, C1000, C2000, C3000 |
Centac is Ingersoll Rand's centrifugal compressed air brand, using a multi-pinion internal gear drive and multi-stage compression, with output covering approximately 720–51,000 m³/h depending on model and pressure range of approximately 0.7–22.5 bar. The machines are 100% oil-free and commonly hold ISO 8573-1 Class 0 oil-free certification, serving industries such as electronics, pharmaceuticals, petrochemicals and textiles where air quality is critical.
- The table above is a compatibility range; individual fitment must be confirmed by machine nameplate and serial number.
- Large Centac machines usually take multiple elements; the quantity per machine depends on the model. Confirm the element count before ordering.
- If you are unsure which series your machine belongs to, supply a nameplate photo and we will cross-check by serial number.
Related Components
Seven components on the Centac inlet and lubrication systems are commonly serviced on the same cycle as the inlet filter. The table lists location, function and inspection points; for specific part numbers, refer to the machine Centac parts manual.
| Component | Location | Function | Inspection points |
|---|---|---|---|
| Intake air filter core | Inlet filter housing | Similar-named alternative part number (67765362 in local manuals) | Check the number on the part; do not confuse with 67754101 |
| Differential pressure gauge | On the inlet filter housing | Indicates element dust loading; the authoritative basis for replacement timing | Check the needle returns correctly; sensing lines must be clear and not frozen |
| Inlet guide vane assembly | Downstream of the filter, upstream of the first-stage impeller | Regulates inlet volume and angle for capacity control | Check the linkage for binding or looseness; vane fouling affects control accuracy |
| Intake silencer | In the intake duct | Reduces intake noise; on some models also straightens airflow | Check for corrosion perforation and loose silencing material |
| Intercooler tube bundles | Between compression stages | Lowers interstage air temperature; a key factor in centrifugal efficiency | Check air-side fouling; on water-cooled machines also check water-side scaling |
| Aftercooler | After the final stage | Cools discharge air to the set temperature | Blocked tubes directly raise discharge temperature |
| Gearbox and bearing lubrication components | Gear speed-increasing box | Lubricates gears and high-speed bearings (isolated from the compression path) | Test oil per machine requirements; monitor oil level and temperature |
Related replacement advice: centrifugal maintenance value lies in efficiency retention. Each time you change the inlet element, inspect the differential pressure gauge, guide vane mechanism and intercooler condition in the same shutdown window. Cooler cleaning and impeller inspection should be part of the annual planned maintenance rather than a reaction to falling efficiency.