Product
Ingersoll Rand 67754101 Centac Inlet Air Filter Element | OEM Part
Ingersoll Rand 67754101 inlet air filter element for Centac, Centac C and CN centrifugal compressors. 5–10 μm filtration, ≥98% efficiency, 5.4 kg net weight, manual ref. 1X9428. Verify fitment by machine serial number.
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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 is mounted inside the inlet filter housing, upstream of the inlet guide vanes and the first-stage impeller. Because the impeller accelerates air at high speed and the diffuser converts that velocity into pressure, the air must be clean before it reaches the first stage — this element is the particle barrier protecting the impeller blades and intercooler passages.
The element is notably larger and heavier than a typical screw compressor filter: approximately 5.4 kg (11.94 lbs) net, two to three times the weight of a standard rotary screw inlet filter (usually 1–3 kg). This reflects the high inlet volume of Centac machines, which can move tens to hundreds of cubic meters per minute. A larger filtration area keeps face velocity and pressure drop low.
Centrifugal compressors depend on inlet filtration more heavily than screw machines. Centac units are 100% oil-free, so there is no lubricant circulating through the compression chamber to carry contaminants away. Dust that enters deposits on the impeller, diffuser and intercooler tubes. Impeller fouling changes dynamic balance and aerodynamic efficiency; intercooler tube fouling raises interstage temperature and lowers overall efficiency. Centac units are often continuous-duty prime equipment, and the cost of one unplanned shutdown usually far exceeds the cost of the element itself.
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 |
| Construction | 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 the machine inlet differential pressure gauge |
Technical Parameters
1. Filtration performance
| Parameter | Value / note |
|---|---|
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% (for particles ≥5 μm) |
| Filter class | Centrifugal inlet elements are characterised per ISO 5011 by efficiency, inlet restriction and dust holding capacity, not by ventilation filter classes such as EN 779 |
Why centrifugal compressors are more sensitive to inlet cleanliness: Centac impellers run at tens of thousands of rpm and have narrow blade passages. Particles strike the impeller at much higher relative velocity than in a screw rotor, so erosion from the same particle size is more significant. Once intercooler tubes foul, cleaning requires shutdown and disassembly — unplanned overhaul work.
2. Flow and pressure drop
| Parameter | Value / note |
|---|---|
| Rated air flow | — |
| Face velocity | — |
| Initial pressure drop | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Operating differential range | From new-element initial 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 unit must increase power to hold pressure and flow, raising specific power |
Pressure drop and energy use: A Centac is a centrifugal machine, and its output depends on inlet air density. As the element loads with dust, inlet vacuum rises and the pressure and density of air entering the first stage fall. To maintain set discharge pressure and flow, the unit must increase speed or power, and specific power rises. Centac units are typically medium-to-large continuous-duty machines, so this energy loss over a year usually far exceeds the cost of a filter element — which is why Ingersoll Rand fits an inlet differential pressure indicator.
3. Construction and installation
| Parameter | Value / note |
|---|---|
| Type | Cylindrical inlet element, installed in the filter housing |
| Net weight (each) | Approx. 5.4 kg (11.94 lbs) |
| Mounting interface | Fits the Centac inlet filter housing; face-sealed under axial compression |
| Sealing method | Face seal (axial compression) |
For reference: at approx. 5.4 kg net, this element is 2–3 times the weight of a standard screw compressor inlet filter (1–3 kg) and is a large centrifugal-class element. Do not cross-reference other part numbers by weight or appearance alone.
4. 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 (inner core + outer guard) |
| End caps | Metal end caps (galvanised steel) with polyurethane bonding |
| Seal | NBR (nitrile rubber) gasket |
| Adhesive | Polyurethane (PU) hot-melt adhesive |
5. 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 should withstand the machine inlet alarm differential without collapsing |
| Special features | No flame-retardant, anti-static or special coating markings are listed for this model |
6. 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 mist), desert (fine dust) or industrial (process dust) environments |
| Shelf life | Approx. 2–3 years (unopened, dry, ventilated storage) |
On change intervals: In addition to the 2,000-hour reference, some guidance suggests every 8,000 hours or annually (common for rotary screw applications). For Centac centrifugal machines, the inlet differential pressure gauge reading is the most reliable indicator — dust loading varies widely by site and can change actual intervals by multiples.
7. Applicable standards
| Item | Content |
|---|---|
| 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 — particle measurement) |
| Commonly referenced test standards | ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968 |
| Standard applicability note | 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 certification context | Centac machines served by this element are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first barrier maintaining that oil-free class |
Installation and Maintenance Steps
Centrifugal machine work differs from screw compressor work: the impeller has significant rotational inertia, so you must wait for the controller to confirm zero speed. A single job takes about 40–60 minutes and may require two people or mechanical assistance depending on housing size (this element weighs 5.4 kg net, so use safe lifting and support measures).
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 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 end-cover clamps or fasteners evenly in a diagonal sequence. Criterion: on large housings, support the cover until the last fastener is released to prevent it dropping suddenly.Remove the old element and inspect for dust tracks
Pull out the old element. It is heavy, so support it carefully and avoid crushing the filter paper. Look for dust tracks on the housing inner wall — tracks indicate seal bypass, meaning unfiltered air has bypassed the seal. Criterion: no dust tracks on the inner wall means the seal was good.Clean the housing and sealing surfaces
Wipe the housing inner wall, base and sealing surfaces with a dry, lint-free cloth. Do not blow compressed air hard into the housing interior (it will drive dust into the intake passage). Criterion: no loose dust inside; sealing surfaces flat with no pits or corrosion.Verify the new element
Compare with the old part item by item: part number, dimensions, seal integrity, undamaged filter paper. Criterion: part number and dimensions must all match before installation; measure this element to confirm (see Section 3).Install the new element and confirm seating
Place 67754101 into the housing and confirm it seats fully at the base, the sealing face contacts without trapped material, and the element is centred without skew. Criterion: even compression marks around the sealing face.Refit the cover and check the gauge impulse line
Refit the cover and tighten evenly in a diagonal sequence in stages. Before start-up, confirm the inlet differential pressure gauge impulse line is clear, not blocked and not frozen. Criterion: line clear; a blocked impulse 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 according to the machine procedure. Once running steadily, read the inlet differential pressure; it should return to the clean-element baseline range. 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 danger of seal bypass is amplified on centrifugal machines. Screw compressors still have lubricant to carry away some particles, but a centrifugal compression chamber is oil-free, so particles all deposit on the impeller and coolers — one seal failure can mean one impeller dynamic balancing job.
FAQ
Which machines use 67754101?
Ingersoll Rand Centac centrifugal air compressors, including Centac, Centac C Series and CN Series. The Centac range is very broad, so exact fitment requires checking the machine nameplate and serial number.
How do I know when to change 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 it too long.
How much does dust loading affect centrifugal efficiency?
Rising inlet vacuum lowers inlet air density, so the unit must increase power to hold pressure and flow, and specific power rises. Centac is a medium-to-large continuous-duty machine, and this energy loss over a year usually 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 filter paper fibre structure and creates invisible channels that let unfiltered air pass — more dangerous than not changing it.
What else should I check when changing the element?
The inlet guide vane linkage, inlet silencer, intercooler tube bundles and housing sealing surfaces. For water-cooled models, also check the cooler water side for scaling, which directly affects interstage temperature. Always check that the differential pressure gauge impulse line is clear.
Can this element be used in place of a screw compressor air filter?
No. At approx. 5.4 kg net, it is 2–3 times the weight of a screw compressor inlet filter, and its dimensions, filtration area and restriction characteristics are designed for the high inlet volume of centrifugal machines. The two are not interchangeable.
Are 67754101 and 67765362 the same part?
No. Both names 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 itself before ordering; do not judge by name.
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 other part numbers by weight or appearance alone.
Is it in stock? 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. Exact timing depends on stock and shipping schedule at the time of enquiry.
How do I confirm the part number 100%?
Three steps: 1) check the machine nameplate to confirm it is a Centac series; 2) provide the serial number and we will cross-check against the centrifugal parts catalogue; 3) read the part number on the old element itself. Step 3 is the most reliable.
Compatible Machine Models
This part number fits Ingersoll Rand Centac centrifugal air compressors. Compatibility range:
| No. | Compatible machine | Note |
|---|---|---|
| 1 | Centac | Main centrifugal series, including multi-stage, multi-shaft gear-driven construction |
| 2 | Centac C Series | Common models include C400, C700, C700e, C1000, C2000, C3000 and others |
Background on Centac machines
Centac is Ingersoll Rand's centrifugal compressed air machine brand, using multi-shaft internal gear drive and multi-stage compression. Output flow covers approximately 720–51,000 m³/h depending on model, with pressure range approximately 0.7–22.5 bar. The units are 100% oil-free and generally hold ISO 8573-1 Class 0 oil-free certification, and are widely used in electronics, pharmaceutical, petrochemical and textile industries where air quality is critical.
How to read the table
- The table shows the compatibility range; individual fitment must be confirmed by machine nameplate and serial number.
- Large Centac machines usually have multiple filter elements in the inlet system; the number per unit depends on the model. Confirm the element count before ordering.
- If you are unsure which series the machine belongs to, provide a nameplate photo and we will cross-check by serial number.
Related Components
Seven components in the Centac inlet and lubrication systems are maintained on the same cycle as 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 | Another part number with a similar name (67765362 in the local manual) | Check the part number on the part; do not confuse with 67754101 |
| Differential pressure gauge | On the inlet filter housing | Indicates element dust loading; authoritative basis for change timing | Check the needle returns correctly; impulse line must be clear and not frozen |
| Inlet guide vane assembly | Downstream of filter, upstream of first-stage impeller | Regulates inlet volume and angle for capacity control | Check linkage for binding or looseness; vane fouling affects control accuracy |
| Intake silencer | On the intake duct | Reduces intake noise; on some models also straightens airflow | Check for corrosion perforation and loose acoustic material |
| Intercooler tube bundles | Between compression stages | Lowers interstage air temperature; key to centrifugal efficiency | Check air-side fouling; for water-cooled models also check water-side scaling |
| Aftercooler | After final stage discharge | Cools discharge air to 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 compression chamber) | Test oil per machine requirements; watch oil level and temperature |
Companion replacement advice: The maintenance value of a centrifugal machine centres on efficiency retention. We recommend checking the inlet differential pressure gauge, guide vane mechanism and intercooler condition at every inlet element change, making full use of each shutdown window. Cooler cleaning and impeller inspection should be part of the annual planned maintenance programme, not deferred until efficiency visibly drops.