Product
Ingersoll Rand 67754101 Centac Inlet Air Filter Element | 5.4 kg
Replacement inlet air filter element for Ingersoll Rand Centac, Centac C and CN centrifugal compressors. Part number 67754101, manual reference 1X9428, 5–10 μm filtration at ≥98% efficiency, approx. 5.4 kg. Export-ready with serial-number fitment verification.
- Export packaging & documentation support
- OEM / ODM customization available
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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 before the diffuser converts velocity into pressure, the air must be clean before it reaches the first stage. The inlet element is the particle barrier that protects the impeller blades and the intercooler passages.
This element is notably larger and heavier than a typical screw-compressor air filter: approximately 5.4 kg (11.94 lbs) net, two to three times the weight of a rotary screw inlet element (usually 1–3 kg). That reflects the high inlet volume of Centac machines, which can reach tens to hundreds of cubic metres per minute. A larger filtration area keeps face velocity and pressure drop low.
Centrifugal compressors are 100% oil-free: there is no lubricating oil circulating through the compression chamber to carry contaminants away. Dust that enters deposits on the impeller, diffuser and intercooler tubes. Impeller fouling alters dynamic balance and aerodynamic efficiency; intercooler tube fouling raises interstage temperature and reduces overall efficiency. Centac units are typically continuous-duty assets, so an unplanned shutdown usually costs far more than the element itself.
Core Specifications at a Glance
| Item | Value |
|---|---|
| Part number | 67754101 |
| Description | Element, Inlet Air Filter |
| Brand | Ingersoll Rand |
| Compatible models | Centac, Centac C Series, CN Series centrifugal compressors |
| Manual reference | 1X9428 |
| Type | Dry disposable inlet element |
| Net weight (each) | Approx. 5.4 kg (11.94 lbs) |
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% |
| Recommended change interval | Approx. 2,000 hours, or per inlet differential pressure gauge |
Technical Specifications
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 by efficiency, inlet restriction and dust holding capacity per ISO 5011 |
Centac impellers run at tens of thousands of rpm and have narrow blade passages, so particle impact velocity is far higher than on a screw rotor. Intercooler tube fouling requires shutdown and disassembly to clean, which is unplanned overhaul work.
Flow and Restriction
| Parameter | Value / Note |
|---|---|
| Initial pressure drop | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Operating differential range | From new-element restriction to alarm restriction |
| Alarm / final restriction | Determined by the machine inlet differential pressure gauge |
| Pressure drop vs. energy | Rising inlet restriction lowers inlet air density; the machine increases power to hold pressure and flow, raising specific power |
Because a Centac is a centrifugal machine, its delivery capacity depends on inlet air density. As dust loading increases inlet vacuum, the pressure and density of air entering the first stage fall, and the unit must raise speed or power to maintain set discharge pressure and flow. On continuous-duty machines, that annual energy penalty typically exceeds the cost of a filter element — which is why Ingersoll Rand fits an inlet differential pressure indicator.
Construction and Installation Data
| Parameter | Value / Note |
|---|---|
| Type | Cylindrical inlet element, installed in the filter housing |
| Net weight (each) | Approx. 5.4 kg (11.94 lbs) |
| Mounting | Fits the Centac inlet filter housing; face-seal compression |
| Sealing | Face seal (axial compression) |
For reference: at approx. 5.4 kg, this element is 2–3 times the weight of a standard screw-compressor inlet filter (1–3 kg). Do not cross-reference other part numbers by weight or appearance alone.
Materials
| Parameter | Value / Note |
|---|---|
| Filter media | Imported wood-pulp filter paper (industry-common grades such as HV or Ahlstrom) |
| Media weight | Approx. 130 g/m² |
| Inner / outer support | Galvanised steel perforated core and outer guard |
| End caps | Metal end caps (galvanised steel) with polyurethane bonding |
| Seal | NBR (nitrile) seal ring |
| Bonding | Polyurethane (PU) hot-melt adhesive |
Operating Limits
| Parameter | Value / Note |
|---|---|
| Operating temperature | −10 to +100 °C |
| Relative humidity | ≤80% RH, no condensation |
| Burst strength | Filter paper approx. 200–400 kPa (per ISO 2758 paper burst test) |
| Collapse resistance | Element should withstand the machine inlet alarm differential pressure without collapsing |
| Special features | No flame-retardant, anti-static or special coating is specified for this part number |
Service Life and Maintenance
| Parameter | Value / Note |
|---|---|
| Service life | Approx. 2,000 hours |
| Actual change interval | Per inlet differential pressure gauge; shorten in coastal (salt mist), desert (fine dust) or industrial (process dust) environments |
| Storage shelf life | Approx. 2–3 years (unopened, dry, ventilated conditions) |
Some references also cite an 8,000-hour or annual interval, mainly for rotary screw applications. For Centac centrifugal machines, the inlet differential pressure gauge reading is the most reliable basis — ambient dust loading can change the actual interval several-fold.
Applicable Standards
| Item | Detail |
|---|---|
| Primary product standard | ISO 5011 (inlet air cleaners for engines and compressors — performance testing), covering efficiency, restriction and dust holding capacity |
| Other commonly cited standards | ANSI/CAGI ADF 400-1999 (compressed air and gas), ISO 8573-4 (compressed air — particle measurement) |
| Industry-cited test standards | 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 provide hydraulic filter standards, request ISO 5011 data or the OEM specification sheet. |
| Oil-free context | Centac units served by this element are ISO 8573-1 Class 0 oil-free machines; inlet filtration is the first line of protection for that rating |
Installation and Maintenance Steps
Centrifugal machines differ from screw machines: the impeller has significant rotating inertia, so the controller must confirm zero speed. Allow roughly 40–60 minutes per job; depending on housing size, two people or mechanical assistance may be needed (the element weighs approx. 5.4 kg).
Shut down, confirm zero speed, lock out/tag out. Stop the unit and 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 is upstream of the inlet guide vanes. Loosen cover clamps or fasteners evenly in a diagonal sequence. Criterion: on large housings, support the cover until the last fastener is released.
Remove the old element and inspect the housing for dust tracks. Pull out the old element — it is heavy, so support it and avoid crushing the media. Look for dust tracks on the housing wall; tracks indicate seal bypass, meaning unfiltered air has passed the seal. Criterion: no dust tracks means the seal was effective.
Clean the housing and sealing face. Wipe the housing interior, base and sealing face with a dry, lint-free cloth. Do not blow compressed air into the housing — it drives dust into the inlet duct. 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; confirm dimensions by measurement (see construction notes above).
Install the new element and confirm seating. Place the 67754101 into the housing and confirm it is fully seated, the seal contacts without trapped material, and the element is centred. Criterion: even compression marks around the sealing face.
Refit the cover and check the differential pressure gauge lines. Refit the cover and tighten evenly in a diagonal sequence. Before start-up, confirm the gauge impulse lines are clear, unobstructed and not frozen. Criterion: clear lines — a blocked impulse line gives a falsely clean reading and lets the element run past its service limit.
Start per the centrifugal start-up procedure and verify. Start the unit 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 reading, no abnormal noise; record date, running hours and differential reading.
Centrifugal-specific rule: the consequences of seal bypass are amplified on a centrifugal machine. A screw compressor still has oil to carry away some particles; a centrifugal compression chamber is oil-free, so particles deposit on the impeller and coolers. A single seal failure can mean an impeller dynamic-balance correction.
Frequently Asked Questions
Which machines use 67754101?
Ingersoll Rand Centac centrifugal air compressors, covering Centac, Centac C Series and CN Series. The Centac model range is broad, so exact fitment should be confirmed against 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 reading takes priority — dust loading varies widely by site, so a fixed interval either wastes element life or runs past the limit.
How much does dust loading affect centrifugal efficiency?
Rising inlet vacuum lowers inlet air density, so the machine increases power to hold pressure and flow, raising specific power. Centac units run continuously, so the annual energy penalty typically far 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. Back-blowing with compressed air damages the media structure and creates invisible channels that let unfiltered air pass — more dangerous than not changing it.
What else should be checked during element replacement?
Inlet guide vane linkage, inlet silencer, intercooler tube bundles and housing sealing faces. On water-cooled machines, also check the cooler water side for scaling, which directly affects interstage temperature. Always confirm the differential pressure gauge impulse lines are clear.
Can this element be interchanged with a screw-compressor air filter?
No. At approx. 5.4 kg it is 2–3 times the weight of a screw-compressor inlet element, and its dimensions, filtration area and restriction characteristics are designed for the high inlet volume of a centrifugal machine.
Are 67754101 and 67765362 the same part?
No. Both descriptions contain "inlet air filter" (67754101 = Element, Inlet Air Filter; 67765362 = Intake Air Filter Core), but the part numbers differ. Read the number on the old part before ordering — do not judge by description.
How do I confirm dimensions?
Measure the old element (outside diameter, inside diameter, height) or request a specification drawing from Ingersoll Rand. Do not cross-reference other part numbers by weight or appearance.
Is it in stock and what is the lead time?
Regular stock items ship within 24 hours. Approx. 3–7 days to Southeast Asia, 7–10 days to the Middle East, 10–18 days to Africa and Latin America, and 10–15 days to Russia/Belarus. Confirm at the time of enquiry against stock and sailing schedules.
How do I confirm the part number 100%?
Three steps: check the machine nameplate to confirm it is a Centac series unit; provide the serial number so we can cross-check the centrifugal parts catalogue; and read the part number on the old element. The third step is the most reliable.
Compatible Models
This part number fits Ingersoll Rand Centac centrifugal air compressors as follows:
| No. | Compatible model | Note |
|---|---|---|
| 1 | Centac | Main centrifugal series, including multi-stage, multi-pinion gear-driven configurations |
| 2 | Centac C Series | Common models include C400, C700, C700e, C1000, C2000, C3000 |
Background on Centac models: Centac is Ingersoll Rand's centrifugal compressed air brand, using multi-pinion internal gear drive and multi-stage compression. Output covers roughly 720–51,000 m³/h depending on model, with pressure ranges around 0.7–22.5 bar. The units are 100% oil-free and commonly certified to ISO 8573-1 Class 0, serving electronics, pharmaceutical, petrochemical and textile industries where air quality is critical.
- The table above shows the compatible range; individual fitment must be confirmed against the machine nameplate and serial number.
- Large Centac machines usually use multiple elements in the inlet system; the quantity per unit depends on the model. Confirm the element count before ordering.
- If you are unsure which series your machine belongs to, send a nameplate photo and we will cross-check by serial number.
Related Components
Seven components in the Centac inlet and lubrication systems are commonly serviced on the same cycle as the inlet element. The list below is organised by location, function and inspection point; refer to the Centac parts manual for specific part numbers.
| Component | Location | Function | Inspection point |
|---|---|---|---|
| Intake Air Filter Core | Inlet filter housing | A separate part number with a similar description (67765362 in the local manual) | 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; impulse 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 linkage for binding or looseness; vane fouling affects control accuracy |
| Intake Silencer | Inlet ducting | Reduces inlet noise; on some models also straightens airflow | Check for corrosion perforation or detached silencing material |
| Intercooler Tube Bundles | Between compression stages | Reduces interstage air temperature; key to centrifugal efficiency | Check air-side fouling; on water-cooled units 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 chamber) | Test oil per machine requirements; monitor oil level and temperature |
Recommended companion work: on a centrifugal machine, maintenance value is concentrated in efficiency retention. Each time you change the inlet element, inspect the differential pressure gauge, guide vane mechanism and intercooler condition to make full use of the shutdown window. Cooler cleaning and impeller inspection should be part of the annual planned maintenance schedule, not deferred until efficiency visibly drops.