Product
Ingersoll Rand Centac Inlet Air Filter Element 67754101
OEM replacement inlet air filter element for Ingersoll Rand Centac, Centac C, and CN centrifugal compressors. Part number 67754101, manual ref. 1X9428, 5–10 μm filtration, ≥98% efficiency, approx. 5.4 kg net weight. Export-ready with serial number verification.
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- 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 is installed 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 velocity 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 intercooler passages.
This element is notably larger and heavier than standard screw compressor filters: approximately 5.4 kg (11.94 lbs) net per unit, two to three times the weight of a typical screw compressor inlet filter (usually 1–3 kg). This reflects the high intake volume of centrifugal machines, where Centac units can handle from tens to hundreds of cubic meters per minute, requiring a larger filtration area to maintain low face velocity and low resistance.
Centrifugal compressors are 100% oil-free, so there is no lubricating oil to carry away contaminants. Any dust that enters will deposit on the impeller, diffuser, and intercooler. Impeller fouling alters dynamic balance and aerodynamic efficiency, while intercooler tube fouling directly raises interstage temperatures and reduces overall efficiency. Centac units are often continuous-duty main machines, and the cost of one unplanned shutdown usually far exceeds the cost of the filter itself.
Core Specifications
| Item | Value |
|---|---|
| Part Number | 67754101 |
| Name | Element, Inlet Air Filter |
| Brand | Ingersoll Rand |
| Compatible Models | Centac, Centac C series, CN series centrifugal compressors |
| Manual Reference | 1X9428 |
| Type | Dry disposable inlet filter element |
| Net Weight (per unit) | Approx. 5.4 kg (11.94 lbs) |
| Dimensions | — |
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% |
| Recommended Replacement | Approx. 2000 hours or 3 months, or per 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 | Not classified under EN 779; centrifugal inlet filters are characterized per ISO 5011 by efficiency, pressure drop, and dust holding capacity |
| Dust Holding Capacity | — |
Centrifugal compressors are more sensitive to inlet cleanliness: Centac impellers run at tens of thousands of RPM, and blade passages are narrow. Particles impact the impeller at much higher relative speeds than in screw compressors, so erosion from the same particle size is more severe. Once intercooler tubes foul, cleaning requires shutdown and disassembly, which is a major unplanned maintenance task.
2. 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 Pressure Range | From clean element initial resistance 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 |
Pressure drop directly affects energy consumption. Because Centac is a centrifugal machine, its delivery capacity depends on inlet air density. As dust accumulates and inlet vacuum increases, both the pressure and density of air entering the first-stage impeller drop. The unit must then increase speed or power to maintain discharge pressure and flow, raising specific power. Centac units are typically medium-to-large continuous-duty machines, so the annual energy penalty often far exceeds the cost of a filter element. This is why Ingersoll Rand equips Centac units with inlet differential pressure indication.
3. Construction and Installation
| Parameter | Value / Note |
|---|---|
| Dimensions | — |
| Type | Cylindrical inlet filter element (installed in filter housing) |
| Net Weight (per unit) | Approx. 5.4 kg (11.94 lbs) |
| Effective Filtration Area | — |
| Pleat Count / Pitch | — |
| Mounting Interface | Fits into Centac inlet filter housing, axial compression seal |
| Sealing | End-face seal (axial compression) |
Before ordering, confirm dimensions by one of the following: ① measure the old element (outer diameter, inner diameter, height — recommended); ② request a specification drawing from Ingersoll Rand; ③ provide photos and measurements of the old element for our review. 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) and is a large centrifugal-duty element. Do not substitute other part numbers based on weight alone.
4. Materials of Construction
| Parameter | Value / Note |
|---|---|
| Filter Media | Imported wood pulp filter paper (commonly US HV or Ahlstrom media) |
| Media Weight | Approx. 130 g/m² |
| Inner/Outer Support | Galvanized steel perforated cage (inner cage + outer guard) |
| End Caps | Metal end caps (galvanized steel) + polyurethane adhesive |
| Seal | Nitrile rubber (NBR) seal ring |
| Bonding | Polyurethane (PU) hot-melt adhesive |
5. Operating Limits
| Parameter | Value / Note |
|---|---|
| Operating Temperature | −10 to +100 °C |
| Relative Humidity | ≤80% RH, non-condensing |
| Burst Strength | Filter paper burst strength approx. 200–400 kPa (per ISO 2758) |
| Collapse Pressure | Element must withstand the unit's inlet alarm differential pressure without collapsing |
| Special Features | No flame-retardant, anti-static, or special coating noted for this model |
6. Service Life and Maintenance
| Parameter | Value / Note |
|---|---|
| Service Life | Approx. 2000 hours or 3 months |
| Actual Replacement Interval | Per the unit's inlet differential pressure gauge; shorten in coastal (salt fog), desert (fine dust), or industrial (process dust) environments |
| Shelf Life | Approx. 2–3 years (unopened, dry, ventilated storage) |
Standard replacement interval is 2000 hours or 3 months, whichever comes first. For Centac centrifugal compressors, the inlet differential pressure gauge reading is the more reliable indicator; actual intervals can vary significantly with dust loading.
7. Applicable Standards
| Item | Content |
|---|---|
| Product Standard | ISO 5011 (Inlet air cleaning equipment for internal combustion engines and compressors — performance testing), evaluating efficiency, pressure drop, and dust holding capacity |
| Other Common References | ANSI/CAGI ADF 400-1999 (compressed air and gas), ISO 8573-4 (compressed air — particle measurement) |
| Commonly Cited 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 provide hydraulic filter standards, request ISO 5011 or the OEM specification sheet. |
| Oil-Free Certification Background | 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 class. |
Standard Maintenance and Installation Steps
Centrifugal compressor work differs from screw compressors: the impeller has significant rotational inertia, and the controller must confirm zero speed. A single job takes about 40–60 minutes and may require two people or mechanical assistance due to the 5.4 kg element weight; ensure safe lifting and handling.
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 apply lockout/tagout. Criterion: controller shows zero speed, no inertial rotation noise.
Open the inlet filter housing. The housing is upstream of the inlet guide vanes. Loosen end cover clamps or fasteners evenly in a diagonal pattern. Criterion: on large housings, support the cover before releasing the last fastener to prevent it from dropping suddenly.
Remove the old element and inspect for dust tracks. Pull out the old element; it is heavy, so support it to avoid crushing the filter paper. Look for dust trails on the housing inner wall — these indicate seal bypass, meaning unfiltered air has bypassed the seal. Criterion: no dust trails on the inner wall means the seal was good.
Clean the housing and sealing surfaces. Wipe the inner wall, bottom, 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 surfaces flat with no pits or corrosion.
Verify the new element. Compare with the old element: part number, dimensions, seal integrity, and undamaged filter paper. Criterion: part number and dimensions must match before installation; dimensions should be measured (see Section 3).
Install the new element and confirm seating. Place the 67754101 into the housing, ensuring it is fully seated at the bottom, the sealing face is in full contact with no trapped material, and the element is centered without tilting. Criterion: uniform compression marks around the seal.
Reinstall the cover and check the differential pressure gauge line. Refit the cover and tighten evenly in a diagonal pattern in stages. Before startup, confirm the inlet differential pressure gauge impulse line is clear, not blocked, and not frozen. Criterion: clear line; a blocked line gives a "false clean" reading and can lead to over-extended element use.
Start per the centrifugal compressor procedure and verify. Start according to the unit's 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 pressure reading, no abnormal noise; record date, running hours, and differential pressure reading.
Centrifugal-specific rule: the danger of seal bypass is amplified in centrifugal compressors. Screw compressors have oil that can carry away some particles, but 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 67754101?
Ingersoll Rand Centac centrifugal air compressors, compatible with Centac, Centac C series, and CN series. The Centac model range is broad, so exact fit requires verification against the unit nameplate and serial number.
How do I know when to replace it?
Two ways: 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 pressure gauge takes priority; dust loading varies greatly by location, so fixed intervals either waste life or run overextended.
How much does a dirty element affect centrifugal compressor efficiency?
Increased inlet vacuum reduces inlet air density, forcing the unit to increase power to maintain pressure and flow, raising specific power. Centac units are medium-to-large continuous-duty machines, so the annual energy cost usually far exceeds the filter cost.
Can I blow it clean and reuse it?
No. This is a dry disposable element and is not designed to be cleaned. Blowing with compressed air damages the 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. For water-cooled units, also check water-side scaling, which directly affects interstage temperature. Also verify 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. Its dimensions, filtration area, and resistance characteristics are designed for the high intake volume of centrifugal compressors. They 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 element itself before ordering; do not judge by name.
How do I confirm dimensions?
Measure the old element (outer diameter, inner diameter, 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 inquiry.
How can I be 100% sure the part number is correct?
Three steps: ① check the unit nameplate to confirm it is a Centac series; ② provide the serial number so we can cross-check against the centrifugal compressor 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. Compatibility range:
| No. | Compatible Model | Note |
|---|---|---|
| 1 | Centac | Main centrifugal series, including multi-stage multi-pinion gear-driven designs |
| 2 | Centac C series | Common models: C400, C700, C700e, C1000, C2000, C3000, etc. |
| 3 | CN series | Another model designation within the Centac family |
Background on Centac models: Centac is Ingersoll Rand's centrifugal compressed air brand, using multi-pinion internal gear drive and multi-stage compression. Output flow ranges from approx. 720–51,000 m³/h (depending on model) with pressure from approx. 0.7–22.5 bar. Units are 100% oil-free and commonly certified to ISO 8573-1 Class 0, used in electronics, pharmaceuticals, petrochemicals, and textiles where air purity is critical.
Reading Notes
- The table above is a compatibility range; individual fit must be confirmed by unit nameplate and serial number.
- Large Centac units often use multiple filter 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 verify by serial number.
Related Components
There are 7 components in the Centac centrifugal compressor inlet and lubrication systems that are maintained on the same cycle as the air 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 local manual) | Verify the number on the part; do not confuse with 67754101 |
| Differential Pressure Gauge | On inlet filter housing | Indicates element dust loading; authoritative for replacement 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 flow and angle for capacity control | Check linkage for binding or looseness; vane fouling affects control accuracy |
| Intake Silencer | Inlet piping | Reduces intake noise; some models also provide airflow straightening | Check for corrosion perforation and loose silencing material |
| Intercooler Tube Bundles | Between compression stages | Lowers interstage air temperature; key to centrifugal efficiency | Check air-side fouling; for water-cooled units also 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 unit requirements; monitor oil level and temperature |
Recommended companion replacements: Centrifugal compressor maintenance value is concentrated in efficiency preservation. When replacing the inlet filter element, also inspect the inlet 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 annual planned maintenance rather than waiting for noticeable efficiency loss.