Product
Ingersoll Rand Centac Inlet Air Filter Element 67754101
Replacement inlet air filter element for Ingersoll Rand Centac centrifugal compressors. Part number 67754101, manual ref. 1X9428, 5–10 μm filtration, ≥98% efficiency, net weight approx. 5.4 kg. Bulk and OEM supply 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 compressor's inlet filter housing, upstream of the inlet guide vanes and the first-stage impeller. Because centrifugal compressors accelerate air to high velocity through narrow impeller passages, the incoming air must be clean before it reaches the first stage. This element is the particle barrier protecting the impeller blades and intercooler passages.
This element is notably larger and heavier than standard screw compressor filters: net weight is approximately 5.4 kg (11.94 lbs), roughly two to three times that of a typical rotary screw inlet filter (1–3 kg). This reflects the high intake volumes of Centac machines, where the element must provide sufficient filtration area to keep face velocity and pressure drop low.
Centrifugal compressors are 100% oil-free: there is no lubricating oil in 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 temperatures and reduces overall efficiency. Centac units typically run continuously as critical equipment, so unplanned downtime costs far more than the filter itself.
Specifications
| Item | Value |
|---|---|
| Part Number | 67754101 |
| Product Name | Inlet Air Filter Element |
| Brand | Ingersoll Rand |
| Compatible Models | Centac, Centac C Series, CN Series centrifugal compressors |
| Manual Reference | 1X9428 |
| Type | Dry disposable inlet element |
| Net Weight | Approx. 5.4 kg (11.94 lbs) |
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% (for particles ≥5 μm) |
| Recommended Change Interval | Approx. 2,000 hours, or per inlet differential pressure gauge |
| Media | Imported wood pulp filter paper, approx. 130 g/m² |
| Support Structure | Galvanized steel perforated inner and outer cages |
| End Caps | Metal (galvanized steel) with polyurethane adhesive |
| Seal | NBR rubber gasket |
| Operating Temperature | −10 to +100 °C |
| Relative Humidity | ≤80% RH, non-condensing |
| Burst Strength | Approx. 200–400 kPa (per ISO 2758) |
| Applicable Standard | ISO 5011 (inlet air filter performance testing) |
| Shelf Life | Approx. 2–3 years (unopened, dry, ventilated storage) |
Fitment note: The Centac range covers many models (C400–C3000 and larger), and filter configurations vary by model and build. Accurate fitment requires the compressor nameplate and serial number, checked against the Ingersoll Rand centrifugal parts catalog. We can cross-reference from a nameplate photo.
Similar part number warning: The same Centac parts list also includes 67765362 (Intake Air Filter Core). The names are similar but the part numbers are different. Always verify the number on the old element itself before ordering.
Technical Details
Filtration Performance
| Parameter | Value / Note |
|---|---|
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% for particles ≥5 μm |
| Filter Class | Not classified under EN 779 (HVAC). Centrifugal inlet filters are characterized per ISO 5011 by efficiency, inlet resistance, and dust holding capacity. |
Why centrifugal compressors are more sensitive to inlet cleanliness: Centac impellers rotate at tens of thousands of RPM, and blade passages are narrow. Particles impact the impeller at much higher relative velocities than in screw rotors, so erosion effects are more pronounced. Once intercooler tubes foul, cleaning requires shutdown and disassembly — a major unplanned maintenance task.
Flow and Pressure Drop
| Parameter | Value / Note |
|---|---|
| Initial Pressure Drop | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Operating Differential Range | From clean element initial resistance to alarm resistance |
| Alarm / Final Resistance | Per the compressor'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 |
Pressure drop and energy consumption: Centac is a centrifugal machine, so its output depends on inlet air density. As the element loads with dust, inlet vacuum increases, reducing the pressure and density of air entering the first-stage impeller. To maintain discharge pressure and flow, the compressor must increase speed or power, raising specific power. For large continuous-duty centrifugal machines, this energy loss over a year typically far exceeds the cost of a filter element — which is why Ingersoll Rand equips Centac units with inlet differential pressure indication.
Construction and Installation
| Parameter | Value / Note |
|---|---|
| Type | Cylindrical inlet element, installed in filter housing |
| Net Weight | Approx. 5.4 kg (11.94 lbs) |
| Installation Interface | Fits Centac inlet filter housing; axial compression seal |
| Sealing Method | 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), confirming it is a large centrifugal-duty element. Do not substitute other part numbers based on weight or appearance alone.
Materials
| Parameter | Value / Note |
|---|---|
| Filter Media | Imported wood pulp filter paper (industry-common HV or Ahlstrom media) |
| Media Weight | Approx. 130 g/m² |
| Cages | Galvanized steel perforated inner cage and outer guard |
| End Caps | Metal (galvanized steel) with polyurethane adhesive |
| Seal | NBR rubber gasket |
| Adhesive | Polyurethane (PU) hot-melt |
Operating Conditions
| Parameter | Value / Note |
|---|---|
| Operating Temperature | −10 to +100 °C |
| Relative Humidity | ≤80% RH, non-condensing |
| Burst Strength | Approx. 200–400 kPa (per ISO 2758) |
| Collapse Resistance | Element should withstand the compressor's inlet alarm differential without collapsing |
| Special Features | No flame-retardant, anti-static, or special coating noted for this model |
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 |
| Shelf Life | Approx. 2–3 years (unopened, dry, ventilated storage) |
On change intervals: Besides the 2,000-hour reference, some sources suggest "every 8,000 hours or annually," typically for rotary screw applications. For Centac centrifugal compressors, the inlet differential pressure gauge reading is the most reliable indicator — actual intervals vary widely with ambient dust load.
Standards
| Item | Content |
|---|---|
| Primary Standard | ISO 5011 (inlet air filters for internal combustion engines and compressors — performance testing), evaluating efficiency, inlet resistance, and dust holding capacity |
| Other Referenced Standards | ANSI/CAGI ADF 400-1999 (compressed air and gas), ISO 8573-4 (compressed air — solid particle measurement) |
| Commonly Cited 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 filters. If a supplier can only provide hydraulic filter standards, request ISO 5011 or the OEM specification sheet. |
| Oil-Free Certification Context | The Centac units this element serves are ISO 8573-1 Class 0 oil-free certified. Inlet filtration is the first line of defense for maintaining that oil-free class. |
Installation and Maintenance Steps
Centrifugal machines differ from screw compressors: the impeller has significant rotational inertia, so you must wait for the controller to confirm zero speed. The job takes about 40–60 minutes; depending on housing size, two people or mechanical assistance may be needed (the element weighs approx. 5.4 kg, so use safe lifting and handling practices).
Stop the compressor, confirm zero speed, lock out/tag out. Do not judge by sound. Switch off 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 end-cover latches or fasteners evenly in a diagonal pattern. Criterion: on large housings, support the cover before releasing the last fastener to prevent it from dropping.
Remove the old element and inspect for dust tracks. The element is heavy — support it to avoid crushing the media. Look for dust tracks on the housing interior; these indicate seal bypass, meaning unfiltered air has bypassed the seal. Criterion: no dust tracks means the seal was effective.
Clean the housing and sealing surfaces. Wipe the interior, bottom, and sealing surfaces with a dry, lint-free cloth. Do not blow compressed air into the housing (it will drive dust into the intake). Criterion: no loose dust inside; sealing surface flat, free of pits or corrosion.
Verify the new element. Compare with the old one: part number, dimensions, seal integrity, and undamaged media. Criterion: part number and dimensions must match before installation. Confirm dimensions by measurement (see Technical Details).
Install the new element and confirm seating. Place the 67754101 into the housing and confirm it is fully seated at the bottom, the seal is properly aligned with no trapped material, and the element is centered. Criterion: even compression marks around the seal face.
Reinstall the cover and check the differential pressure gauge lines. Reinstall the cover and tighten evenly in a diagonal pattern. Before startup, confirm the inlet differential pressure gauge impulse lines are clear, not blocked, and not frozen. Criterion: clear lines; a blocked impulse line gives a false "clean" reading and can lead to over-extended element use.
Start per the centrifugal compressor procedure and verify. Start per the machine's procedure. After stable operation, 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 that can carry away some particles; centrifugal compression chambers are oil-free, so all particles deposit on the impeller and coolers. A single seal failure can lead to an impeller dynamic balancing job.
Frequently Asked Questions
Which machines use 67754101?
Ingersoll Rand Centac centrifugal air compressors: Centac, Centac C Series, and CN Series. The Centac range is broad, so accurate fitment requires the compressor nameplate and serial number.
How do I know when to replace it?
Two ways: (1) read the compressor's inlet differential pressure gauge (most reliable, reflects actual dust loading); (2) use the 2,000-hour interval as a reference. The gauge reading takes priority — dust loads vary widely, so fixed intervals either waste element life or run too long.
How much does dust loading affect centrifugal efficiency?
Higher inlet vacuum reduces inlet air density. To maintain pressure and flow, the compressor must increase power, raising specific power. Centac is a large continuous-duty machine, so this energy loss over a year 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 fiber 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?
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. Also verify the differential pressure gauge impulse lines are clear.
Can this element be interchanged with a screw compressor filter?
No. At approx. 5.4 kg, this element is 2–3 times the weight of a screw compressor inlet filter. Its dimensions, filtration area, and resistance characteristics are designed for the high intake volumes of centrifugal machines. They are not interchangeable.
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 are different. Read the number on the old element before ordering — do not judge by name.
How do I confirm dimensions?
Measure the old element (outside diameter, inside diameter, height) or request a specification drawing from Ingersoll Rand. Do not substitute other part numbers based on weight or appearance.
Do you have 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. Confirm with current stock and shipping schedules at the time of inquiry.
How can I be 100% sure of the correct part number?
Three steps: (1) check the compressor nameplate to confirm it is a Centac series; (2) provide the serial number and we will cross-reference the centrifugal parts catalog; (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:
| No. | Compatible Model | Note |
|---|---|---|
| 1 | Centac | Main centrifugal series, including multi-stage, multi-shaft gear-driven configurations |
| 2 | Centac C Series | Common models include C400, C700, C700e, C1000, C2000, C3000, etc. |
About Centac: Centac is Ingersoll Rand's centrifugal compressed air brand, using multi-shaft internal gear drive and multi-stage compression. Output covers approximately 720–51,000 m³/h (depending on model), with pressure ranges around 0.7–22.5 bar. Units are 100% oil-free and commonly certified to ISO 8573-1 Class 0, serving industries such as electronics, pharmaceuticals, petrochemicals, and textiles that require high air purity.
Reading the table:
- The table shows the compatible range. Individual fitment must be confirmed by compressor nameplate and serial number.
- Large Centac units often use 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 your unit belongs to, provide a nameplate photo and we will cross-reference by serial number.
Related Parts
Seven components in the Centac inlet and lubrication systems are commonly maintained on the same cycle as the inlet filter. Listed by location, function, and inspection points. Refer to the Centac parts manual for specific part numbers.
| Component | Location | Function | Inspection Points |
|---|---|---|---|
| Intake Air Filter Core | Inlet filter housing | Another 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 inlet filter housing | Indicates element dust loading; authoritative for change timing | Check needle returns to zero; impulse lines must be clear and not frozen |
| Inlet Guide Vane Assembly | Downstream of filter, upstream of first-stage impeller | Regulates inlet flow and angle for capacity control | Check linkage for binding or looseness; vane fouling affects control accuracy |
| Intake Silencer | Inlet duct | Reduces intake noise; some models also serve as flow straightener | Check for corrosion perforation or silencer material detachment |
| Intercooler Tube Bundles | Between compression stages | Reduces interstage air temperature; key to centrifugal efficiency | Check air-side fouling; on water-cooled models, check water-side 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-increasing box | Lubricates gears and high-speed bearings (isolated from compression chamber) | Test oil per machine requirements; monitor oil level and temperature |
Recommended companion maintenance: Centrifugal compressor maintenance value is concentrated in efficiency retention. Each time you replace the inlet filter element, 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 included in the annual planned maintenance program, not deferred until efficiency drops noticeably.