Product
Ingersoll Rand 67754101 Centac Inlet Air Filter Element | 1X9428
Ingersoll Rand 67754101 inlet air filter element for Centac, Centac C and CN centrifugal compressors (manual ref. 1X9428). 5–10 μm filtration, ≥98% efficiency, approx. 5.4 kg net. Export-ready, serial-number verification supported.
- Export packaging & documentation support
- OEM / ODM customization available
- Sample and bulk order workflow
Product Overview
67754101 is the inlet air filter element (Element, Inlet Air Filter) for Ingersoll Rand Centac centrifugal air compressors. It is mounted 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 diffusion into pressure, the air must be clean before it reaches the first stage. This element acts as the particle barrier protecting the impeller blades and the intercooler passages.
This element is notably larger and heavier than typical rotary-screw air filter elements: approximately 5.4 kg (11.94 lbs) net per piece, roughly two to three times the weight of screw compressor elements (usually 1–3 kg). That reflects the high inlet volumes of Centac machines, where a larger filtration area is needed to keep face velocity and pressure drop low.
Centrifugal machines 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. 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 the cost of one unplanned shutdown usually far exceeds the price of the element.
Core Specifications
| Item | Value |
|---|---|
| Part number | 67754101 |
| Description | Element, Inlet Air Filter |
| Brand | Ingersoll Rand |
| Applicable machines | Centac, Centac C series, CN series centrifugal compressors |
| Manual reference | 1X9428 |
| Construction | Dry, disposable inlet element |
| Net weight per piece | 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 |
Fitment confirmation: the Centac range is broad (C400–C3000 and larger). Element configuration varies by model and build. Accurate fitment requires cross-checking the machine nameplate and serial number against the Ingersoll Rand centrifugal parts catalog, or supplying a nameplate photo for reverse lookup.
Similar part number alert: the same Centac parts list also includes 67765362 (Intake Air Filter Core). The names are similar but the part numbers differ. Before ordering, read the number on the old element itself rather than relying on the description.
Technical Parameters
Filtration Performance
| Parameter | Value / Note |
|---|---|
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% for particles ≥5 μm |
| Filter class | Not classified under ventilation filter standards (EN 779); centrifugal inlet elements are characterised per ISO 5011 by efficiency, inlet restriction and dust holding capacity |
Centac impellers run at tens of thousands of rpm with narrow blade passages, so the relative impact velocity of particles is much higher than in a screw rotor. Intercooler tube fouling requires shutdown and disassembly to clean, making it unplanned overhaul work.
Flow and Pressure Drop
| Parameter | Value / Note |
|---|---|
| Rated air flow | — |
| Filtration face velocity | — |
| Initial pressure drop | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Operating differential range | From clean-element baseline 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 must increase power to hold pressure and flow, raising specific power |
Because a Centac is a centrifugal machine, its delivery depends on inlet air density. As element loading increases inlet vacuum, the pressure and density entering the first-stage impeller fall, and the unit must increase speed or power to maintain set discharge pressure and flow. On medium-to-large continuous-duty machines, that energy penalty typically exceeds the cost of an element set over a year — which is why Ingersoll Rand fits an inlet differential pressure indicator.
Construction and Installation
| Parameter | Value / Note |
|---|---|
| Construction | Cylindrical inlet element, installed in the filter housing |
| Net weight per piece | Approx. 5.4 kg (11.94 lbs) |
| Mounting interface | Fits the Centac inlet filter housing; axial face compression seal |
| Sealing | Face seal under axial compression |
For reference, at approximately 5.4 kg this element is two to three times the weight of a typical screw compressor air filter element (1–3 kg). Do not substitute other part numbers based on weight or appearance alone.
Materials
| Parameter | Value / Note |
|---|---|
| Filter media | Imported wood-pulp filter paper (commonly US HV or Ahlstrom media in the industry) |
| Media basis weight | Approx. 130 g/m² |
| Inner / outer support | Galvanised steel perforated core (inner cage plus outer guard) |
| End caps | Metal end caps (galvanised steel) bonded with polyurethane adhesive |
| Seal | Nitrile rubber (NBR) gasket |
| Bonding | Polyurethane (PU) hot-melt adhesive |
Operating Tolerance
| Parameter | Value / Note |
|---|---|
| Operating temperature | −10 to +100 °C |
| Relative humidity | ≤80% RH, no condensation |
| Burst strength | Filter paper burst strength approx. 200–400 kPa (per ISO 2758) |
| Collapse resistance | Element must withstand the machine inlet alarm differential without collapsing |
| Special features | No flame-retardant, anti-static or special coating marking noted for this model |
Service Life and Maintenance
| Parameter | Value / Note |
|---|---|
| Service life | Approx. 2,000 hours |
| Actual change interval | Per the machine inlet differential pressure gauge; shorten in coastal (salt-laden), desert (fine dust) or industrial (process dust) environments |
| Storage shelf life | Approx. 2–3 years (unopened, dry, ventilated conditions) |
Besides the 2,000-hour reference interval, an alternative guidance of “every 8,000 hours or annually” is often quoted, mainly for rotary screw applications. For Centac centrifugal machines, the inlet differential pressure gauge reading is the most reliable trigger, because ambient dust loading can change the practical interval by a factor of several.
Applicable Standards
| Item | Content |
|---|---|
| Product standard | ISO 5011 (inlet air cleaning equipment for internal combustion engines and compressors — performance testing), evaluating 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 — particle measurement) |
| Frequently quoted test standards | ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968 |
| Standard applicability note | The ISO 29xx / 37xx series are actually 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 certification context | The Centac machines served by this element are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first safeguard maintaining that class |
Standard Installation and Maintenance Steps
Centrifugal machine work differs from screw compressor work: the impeller has significant 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 approximately 5.4 kg, so plan safe lifting and support).
- Shut down, confirm zero speed, lock out/tag out. Stop the machine and wait for the controller to confirm zero speed (do not judge by sound alone). Isolate the main power and apply lockout/tagout. Criterion: controller shows zero speed and no inertial rotation noise.
- Open the inlet filter housing. The housing is upstream of the inlet guide vanes. Loosen the cover latches or fasteners evenly in a diagonal sequence. Criterion: on large housings, support the cover until the last fastener is released to prevent it dropping.
- Remove the old element and inspect the housing for dust tracks. Withdraw the old element, supporting its weight to avoid crushing the media. Look for dust tracks on the housing wall — tracks indicate seal bypass, meaning unfiltered air has bypassed the seal. Criterion: no dust tracks on the inner wall means the seal was effective.
- 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 hard into the housing interior, as this drives dust into the intake. Criterion: no loose dust inside; sealing face flat with no pits or corrosion.
- Verify the new element. Compare against the old part item by item: part number, dimensions, seal integrity, undamaged media. Criterion: part number and dimensions must match fully before installation; confirm dimensions by measurement (see above).
- Install the new element and confirm seating. Fit the 67754101 into the housing, confirming full seating at the base, clean seal contact with no trapped material, and a centred, non-skewed element. Criterion: uniform 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, staged sequence. Before start-up, confirm the inlet differential pressure gauge impulse lines are clear, unobstructed and not frozen. Criterion: clear lines; a blocked impulse line gives a false “clean” reading and lets the element run past its service limit.
- Start per the centrifugal machine procedure and verify. Start according to the machine procedure. Once stable, read the inlet differential pressure; it should return to the clean-element baseline range, and there should be no air leakage noise 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 lubricating oil to carry some particles away, but a centrifugal compression chamber is oil-free, so particles deposit entirely on the impeller and coolers. One seal failure can mean one 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 range is broad, so accurate fitment requires nameplate and serial number verification.
How do I know when to change it?
Two methods: read the machine inlet differential pressure gauge (most reliable, reflecting 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 element loading affect centrifugal efficiency?
Rising inlet vacuum lowers inlet air density, so the machine must increase power to hold pressure and flow, raising specific power. On a continuous-duty medium-to-large Centac, that energy penalty typically exceeds the element cost over a year.
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 fibre structure and creates invisible channels that let unfiltered air pass — more dangerous than not changing it.
What else should be checked when changing the element?
The inlet guide vane linkage, inlet silencer, intercooler tube bundles and housing sealing face. On water-cooled machines, also check the cooler water side for scaling, which directly affects interstage temperature. Always check that the differential pressure gauge impulse lines are clear.
Can this element be used in place of a screw compressor air filter?
No. At approximately 5.4 kg 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 centrifugal machines. The two are not interchangeable.
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. Before ordering, read the number on the old element itself rather than judging by name.
How do I confirm dimensions?
Measure the old element (outside diameter, inside diameter and height) or request the Ingersoll Rand specification drawing. Do not substitute other part numbers based on weight or appearance.
Is it in stock and what is the lead time?
Standard 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 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 belongs to the Centac series; provide the serial number for cross-checking against the centrifugal parts catalog; and 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. Compatibility is summarised below:
| No. | Compatible model | Note |
|---|---|---|
| 1 | Centac | Main centrifugal series, including multi-stage, multi-pinion geared construction |
| 2 | Centac C series | Common models C400, C700, C700e, C1000, C2000, C3000 and similar |
Background on the Centac range
Centac is Ingersoll Rand’s centrifugal compressed air machine brand, using multi-pinion internal gearing and multi-stage compression. Output flow covers approximately 720–51,000 m³/h depending on model, with pressure ranges of approximately 0.7–22.5 bar. The machines are 100% oil-free and commonly certified to ISO 8573-1 Class 0, serving industries such as electronics, pharmaceuticals, petrochemicals and textiles where air purity is critical.
Key reading points
- The table above is a compatibility range; individual fitment must be confirmed by machine nameplate and serial number.
- Large Centac machines typically use multiple elements in the inlet system; the number per machine depends on the model. Confirm the element count before ordering.
- If you are unsure which series your machine belongs to, provide a nameplate photo and we will confirm by serial number.
Related Components
Seven components in the Centac inlet and lubrication systems are maintained on a similar cycle to the air filter. They are listed below by location, function and inspection point. For specific part numbers, refer to the machine Centac parts manual.
| Component | Location | Function | Inspection point |
|---|---|---|---|
| Intake air filter core | Inlet filter housing | A separate part number with a similar name (67765362 in local manuals) | Verify the number on the part; do not confuse with 67754101 |
| Differential pressure gauge | On the inlet filter housing | Indicates element loading and is the authoritative change trigger | 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 flow 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 or loose silencing material |
| Intercooler tube bundles | Between compression stages | Reduces interstage air temperature; a key efficiency factor | 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 chamber) | Test oil per machine requirements; monitor oil level and temperature |
Recommended companion work: maintenance value on a centrifugal machine centres on efficiency retention. At each inlet element change, also 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 scheduled annually rather than waiting for a noticeable efficiency drop.