Product
Ingersoll Rand 67754101 Centac Inlet Air Filter Element | OEM Centrifugal Part
OEM 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. Export-ready with serial number verification and fast dispatch.
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Product Overview
67754101 is the inlet air filter element for Ingersoll Rand Centac centrifugal air compressors, listed under manual reference 1X9428.
It installs inside the inlet filter housing, upstream of the inlet guide vanes and the first-stage impeller. Centrifugal compressors rely on high-speed impeller rotation to accelerate air and convert velocity into pressure through the diffuser. Air must be clean before it reaches the first-stage impeller, and this element acts as the particle barrier protecting the impeller blades and intercooler passages.
This element is notably larger and heavier than standard screw compressor filters: approximately 5.4 kg (11.94 lbs) net, two to three times the weight of a typical screw compressor inlet filter (1–3 kg). This reflects the high intake volume of Centac machines, where inlet flow can range from tens to hundreds of cubic metres per minute and a larger filtration area is required to maintain low face velocity and low resistance.
Centrifugal compressors are more dependent on inlet filtration than screw units: they are 100% oil-free, with no lubricating oil circulating through the compression chamber to carry away contaminants. Any dust that enters deposits on the impeller, diffuser, and intercooler. Impeller fouling alters dynamic balance and aerodynamic efficiency, while intercooler tube fouling directly raises interstage temperature and reduces overall efficiency. Centac units are typically continuous-duty prime movers, and the cost of one unplanned shutdown usually far exceeds the cost of the filter itself.
Core Specifications
| Item | Value |
|---|---|
| Part Number | 67754101 |
| Product Name | Element, Inlet Air Filter |
| Brand | Ingersoll Rand |
| Compatible Models | 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) |
| Dimensions | — |
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% |
| Recommended Change Interval | Approx. 2000 hours or 3 months, or per inlet differential pressure gauge |
Technical Parameters
Filtration Performance
| Parameter | Value / Notes |
|---|---|
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% (for particles ≥5 μm) |
| Filter Classification | Not classified under EN 779 HVAC standards; centrifugal compressor inlet filters are characterised by ISO 5011 using efficiency, inlet resistance, and dust holding capacity |
| Dust Holding Capacity | — |
Centac impellers rotate at tens of thousands of RPM, and blade passages are narrow. Particles strike the impeller at far higher relative velocities than in screw compressors, so erosion from the same particle size is more severe. Once intercooler tubes foul, cleaning requires shutdown and disassembly, amounting to unplanned major maintenance.
Flow and Resistance
| Parameter | Value / Notes |
|---|---|
| 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 resistance |
| Alarm / Final Resistance | Determined by the unit's inlet differential pressure gauge |
| Pressure Drop vs. Energy | Higher inlet resistance → lower inlet air density → higher power required to maintain pressure and flow → higher specific power |
Centac is a centrifugal machine whose delivery capacity depends on inlet air density. As the element accumulates dust, inlet vacuum rises, reducing both pressure and density at the first-stage impeller. To maintain discharge pressure and flow, the unit must increase speed or power, raising specific power. For large continuous-duty centrifugal units, this energy penalty typically far exceeds the cost of a filter element over a year — which is why Ingersoll Rand specifies an inlet differential pressure indicator on Centac machines.
Construction and Installation
| Parameter | Value / Notes |
|---|---|
| Dimensions | — |
| Construction | Cylindrical element, installed into filter housing |
| Net Weight (each) | Approx. 5.4 kg (11.94 lbs) |
| Effective Filtration Area | — |
| Pleat Count / Pitch | — |
| Mounting Interface | Installed into Centac inlet filter housing, axial face seal |
| Seal Type | Face seal (axial compression) |
Dimensions: Confirm before ordering by one of the following: (1) measure the old element (OD, ID, height — recommended); (2) request the specification drawing from Ingersoll Rand; (3) provide photos and measurements of the old element for our verification. Do not cross-reference by weight or appearance alone.
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), confirming it is a large centrifugal element. Do not substitute other part numbers based on weight similarity.
Materials
| Parameter | Value / Notes |
|---|---|
| Filter Media | Imported wood pulp filter paper (industry-common US HV or Ahlstrom media) |
| Media Weight | Approx. 130 g/m² |
| Inner / Outer Support | Galvanised steel perforated cage (inner cage + outer guard) |
| End Caps | Metal end caps (galvanised steel) + polyurethane adhesive |
| Seal | Nitrile rubber (NBR) gasket |
| Bonding Layer | Polyurethane (PU) hot-melt adhesive |
Operating Conditions
| Parameter | Value / Notes |
|---|---|
| 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 unit's inlet alarm differential pressure without collapse |
| Special Features | No flame-retardant, anti-static, or special coating noted for this model |
Service Life and Maintenance
| Parameter | Value / Notes |
|---|---|
| Service Life | Approx. 2000 hours or 3 months |
| Actual Change Interval | Per the unit's 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) |
Change interval: standard is 2000 hours or 3 months, whichever comes first. For Centac centrifugal machines, the inlet differential pressure gauge reading is the more reliable indicator; actual intervals vary significantly with dust loading.
Applicable Standards
| Item | Details |
|---|---|
| Product Standard | ISO 5011 (inlet air filters for internal combustion engines and compressors — performance testing), evaluating efficiency, inlet resistance, and dust holding capacity |
| Other Common References | ANSI/CAGI ADF 400-1999 (compressed air and gas), ISO 8573-4 (compressed air — solid particle measurement) |
| Industry Test Standards | ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968 |
| Standard Applicability Note | The ISO 29xx / 37xx series are general test methods for hydraulic filter elements. If a supplier can only provide hydraulic filter standards, request ISO 5011 or the OEM specification sheet. |
| Oil-Free Certification Context | Centac units served by this element are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first line of defence for maintaining oil-free class. |
Installation and Maintenance Steps
Centrifugal machine procedures differ from screw compressors: the impeller has significant rotational inertia and the controller must confirm zero speed. Allow 40–60 minutes per job; depending on housing size, two people or mechanical assistance may be required (the element weighs 5.4 kg, so safe handling and lifting measures are essential).
- 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 main power and lock out/tag out. Criterion: controller shows zero speed, no inertial rotation noise.
- Open the inlet filter housing. The housing is upstream of the inlet guide vanes. Loosen the end cover latches or fasteners evenly in a diagonal sequence. Criterion: on large housings, have someone support the cover before the last fastener is released to prevent it dropping suddenly.
- Remove the old element and inspect for dust traces inside the housing. Extract the old element carefully — it is heavy, so support it to avoid crushing the filter media. Inspect the housing inner wall for dust tracks; 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 inner wall, base, and sealing surfaces with a dry, lint-free cloth. Do not blow compressed air directly into the housing (it will drive dust into the intake). Criterion: no loose dust inside; sealing surface flat, free of pits and corrosion.
- Verify the new element. Compare with the old element item by item: part number, dimensions, seal integrity, and undamaged media. Criterion: part number and dimensions must match before installation; dimensions for this element must be confirmed by measurement (see Section 3).
- Install the new element and confirm seating. Place the 67754101 into the housing, ensuring it is fully seated at the base, the sealing face is in contact without trapped material, and the element is centred without skew. Criterion: uniform compression marks around the sealing face.
- Refit the end cover and check the differential pressure gauge impulse line. Refit the cover and tighten evenly in diagonal stages. Before start-up, confirm the inlet differential pressure gauge impulse line is clear, not blocked, and not frozen. Criterion: clear line; a blocked impulse line gives a falsely "clean" reading and can lead to over-extended element service.
- Start per the centrifugal compressor procedure and verify. Start according to the unit's specified procedure. Once stable, 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 consequences of seal bypass are amplified on centrifugal machines. Screw compressors have oil to carry away some particles; centrifugal compression chambers are oil-free, so all particles deposit on the impeller and coolers. One seal failure can cost an impeller dynamic balance correction.
Frequently Asked Questions
Which machines use the 67754101?
Ingersoll Rand Centac centrifugal air compressors: Centac, Centac C Series, and CN Series. The Centac model range is broad, so exact fitment requires confirmation against the unit nameplate and serial number.
How do I know when to replace it?
Two methods: (1) read the unit's inlet differential pressure gauge (most reliable, reflects actual dust loading); (2) use 2000 hours or 3 months as a reference. The differential gauge takes priority — dust loading varies widely by site, so fixed intervals either waste element life or risk over-extended operation.
How much does element fouling affect centrifugal compressor efficiency?
Higher inlet vacuum reduces inlet air density, forcing the unit to increase power to maintain pressure and flow, raising specific power. Centac units are large continuous-duty machines, and this energy penalty over a year typically far exceeds the element cost.
Can I blow it clean and reuse it?
No. This is a dry disposable element, not designed for cleaning. Back-blowing with compressed air damages the filter media fibre structure and creates invisible channels that let unfiltered air pass — more dangerous than not replacing it.
What else should I check when replacing the element?
The inlet guide vane linkage, intake silencer, intercooler tube bundles, and housing sealing surfaces. On 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 interchanged with a screw compressor inlet filter?
No. At approx. 5.4 kg, it is 2–3 times the weight of a screw compressor inlet filter. Dimensions, filtration area, and resistance characteristics are all designed for the high intake 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. Before ordering, read the number on the old element itself — do not judge by name.
How do I confirm dimensions?
Measure the old element (OD, ID, height) or request the specification drawing from Ingersoll Rand. Do not substitute other part numbers based on weight or appearance similarity.
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 time of inquiry.
How can I be 100% sure of the correct part number?
Three steps: (1) check the unit nameplate to confirm it is a Centac series; (2) provide the serial number for cross-checking against the centrifugal parts catalogue; (3) read the part number on the old element itself. Step 3 is the most reliable.
Compatible Models
This part number fits Ingersoll Rand Centac centrifugal air compressors. Compatibility range:
| No. | Compatible Model | Notes |
|---|---|---|
| 1 | Centac | Main centrifugal series, including multi-stage, multi-shaft gear-driven construction |
| 2 | Centac C Series | Common models C400, C700, C700e, C1000, C2000, C3000, etc. |
| 3 | CN Series | Another model designation within the Centac family |
About Centac models: Centac is Ingersoll Rand's centrifugal compressed air 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 ranges of approximately 0.7–22.5 bar. Units are 100% oil-free and commonly hold ISO 8573-1 Class 0 oil-free certification, widely used in electronics, pharmaceutical, petrochemical, and textile industries where air purity is critical.
Reading Notes
- The table above is the compatibility range; individual fitment must be confirmed by unit nameplate and serial number.
- Large Centac units often use multiple elements in the inlet system; the number per unit varies by model. Confirm the element count before ordering.
- If unsure which series the unit 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 inlet filter. Listed below by location, function, and inspection points. For specific part numbers, refer to the unit's Centac parts manual.
| Component | Location | Function | Inspection Points |
|---|---|---|---|
| Intake Air Filter Core | Inlet filter housing | Another part number with a similar name (67765362 in this manual) | Verify the number on the old part; do not confuse with 67754101 |
| Differential Pressure Gauge | On the inlet filter housing | Indicates element dust loading; authoritative for change timing | Check needle returns to zero; 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 | Inlet ducting | Reduces intake noise; some models also act as flow straightener | Check for corrosion perforation or loose silencing material |
| Intercooler Tube Bundles | Between compression stages | Reduces interstage air temperature; critical to centrifugal efficiency | Check air side for fouling; water-cooled models also check water side for scaling |
| Aftercooler | After final stage discharge | Cools discharge air to set temperature | Tube blockage directly raises discharge temperature |
| Gearbox and Bearing Lubrication Components | Gear speed increaser housing | Lubricates gears and high-speed bearings (isolated from compression chamber) | Test oil per unit requirements; monitor oil level and temperature |
Planned replacement advice: Centrifugal compressor maintenance value centres on efficiency retention. We recommend checking the inlet differential pressure gauge, guide vane mechanism, and intercooler condition at every inlet element change to make full use of each shutdown window. Cooler cleaning and impeller inspection should be included in annual planned maintenance rather than waiting for a noticeable efficiency drop.