Product
Ingersoll Rand 67754101 Centac Inlet Air Filter Element | Centrifugal Compressor
Genuine Ingersoll Rand 67754101 inlet air filter element for Centac, Centac C and CN series centrifugal compressors. 5–10 μm filtration, ≥98% efficiency, approx. 5.4 kg net weight. Protects impellers and intercoolers; supports serial-number verification.
- 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 installs inside the inlet filter housing, upstream of the inlet guide vanes and the first-stage impeller.
Centrifugal compressors accelerate air through high-speed impellers and convert velocity into pressure. Air must be clean before it reaches the first-stage impeller — this element is the particle barrier protecting impeller blades and intercooler passages.
This element is notably larger and heavier than standard screw compressor filter elements: approximately 5.4 kg (11.94 lbs) net, two to three times the weight of a typical screw compressor air filter (1–3 kg). This reflects the high intake volumes of Centac machines, which can range from tens to hundreds of cubic meters per minute. A larger filtration area maintains low face velocity and low resistance.
Centrifugal compressors are 100% oil-free. With no lubricating oil circulating through the compression chamber to carry away contaminants, dust that enters deposits on impellers, diffusers and intercoolers. Impeller fouling alters dynamic balance and aerodynamic efficiency; intercooler tube fouling raises interstage temperatures and reduces overall efficiency. Centac units are often continuous-duty assets, where an unplanned stop typically costs far more than the filter element itself.
Key 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 |
| Type | Dry disposable inlet element |
| Net Weight | 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 |
Technical Parameters
Filtration Performance
| Parameter | Value / Notes |
|---|---|
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% for particles ≥5 μm |
| Filter Class | Not classified under EN 779 HVAC standards; centrifugal inlet elements are characterized per ISO 5011 by efficiency, inlet resistance and dust holding capacity |
Centac impellers rotate at tens of thousands of rpm with narrow blade passages. Particle impact velocity is much higher than in screw compressors, so erosion from the same particle size is more significant. Intercooler tube fouling requires shutdown and disassembly to clean — unplanned overhaul work.
Flow and Resistance
| Parameter | Value / Notes |
|---|---|
| Initial Pressure Drop | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Alarm / Final Resistance | Per 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, and its output capacity depends on inlet air density. As dust loading increases negative inlet pressure, both pressure and density at the first-stage impeller decrease. The unit must increase speed or power to maintain set discharge pressure and flow, raising specific power. For continuous-duty Centac units, annualized energy loss typically exceeds the cost of a filter element — which is why Ingersoll Rand specifies inlet differential pressure indication.
Construction and Materials
| Parameter | Value / Notes |
|---|---|
| Type | Cylindrical element installed in filter housing |
| Net Weight | Approx. 5.4 kg (11.94 lbs) |
| Mounting | Installed in Centac inlet filter housing, axially compressed at the end face for sealing |
| Sealing | End-face seal (axial compression) |
| Filter Media | Imported wood pulp filter paper (industry-common 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) with polyurethane adhesive |
| Seal | Nitrile rubber (NBR) gasket |
| Bonding | Polyurethane (PU) hot-melt adhesive |
Operating Limits
| 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 should withstand the unit's inlet alarm differential pressure without collapse |
| Special Features | No flame-retardant, anti-static or special coating markings for this part number |
Service Life and Maintenance
| Parameter | Value / Notes |
|---|---|
| Service Life | Approx. 2,000 hours |
| Actual Replacement Interval | Per the unit's inlet differential pressure gauge; shorten in coastal (salt mist), desert (fine dust) or industrial (process dust) environments |
| Storage Shelf Life | Approx. 2–3 years (unopened, dry, ventilated conditions) |
Note on change intervals: Besides the 2,000-hour reference, an "every 8,000 hours or annually" guideline is sometimes cited, mostly for rotary screw applications. For Centac centrifugal compressors, the inlet differential pressure gauge reading is the most reliable basis — actual dust loading can vary by multiples depending on site conditions.
Applicable Standards
| Item | Content |
|---|---|
| Product Standard | ISO 5011 (Inlet air cleaning equipment 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 — particle measurement) |
| Industry-Cited Test Standards | ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968 |
| Standard Applicability | 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 or original manufacturer specifications. |
| 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 compressor work differs from screw compressors: the impeller has significant rotational inertia, so the controller must confirm zero speed. A single job takes about 40–60 minutes; depending on housing size, two people or mechanical assistance may be needed (this element weighs 5.4 kg, so stable lifting and handling is required).
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). Disconnect main power and lock out/tag out. Criterion: controller shows zero speed, no inertial rotation sound.Open the inlet filter housing
The housing is upstream of the inlet guide vanes. Loosen end-cover clamps or fasteners evenly in a diagonal sequence. Criterion: on large housings, support the end 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 — support it to avoid crushing or deforming the filter media. Look for dust tracks on the housing inner wall; these 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, 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 on the inner wall; sealing surface flat with no pits or corrosion.Verify the new element
Compare with the old part item by item: part number, dimensions, seal integrity, no media damage. Criterion: part number and dimensions must all match before installation; measure this element's dimensions to confirm (see Section 3).Install the new element and confirm seating
Place the 67754101 into the housing. Confirm it is fully seated at the bottom, the sealing face contacts evenly with no trapped material, and the element is centered without tilting. Criterion: uniform compression marks around the sealing face.Reinstall the end cover and check the differential pressure gauge lines
Reinstall the end cover and tighten evenly in a diagonal sequence. Before startup, confirm the inlet differential pressure gauge impulse lines are clear, not blocked and not frozen. Criterion: lines clear; a blocked impulse line gives a "false clean" reading, causing the element to be used beyond its service life.Start per the centrifugal compressor procedure and verify
Start per the unit's specified 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 pressure reading, no abnormal noise; record date, running hours and differential pressure reading.
Centrifugal-specific rule: the consequences of seal bypass are amplified on centrifugal machines. Screw compressors still have lubricating oil to carry away some particles; the centrifugal compression chamber is oil-free, so all particles deposit on impellers 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: Centac, Centac C series and CN series. The Centac family spans a wide range, 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 the 2,000-hour interval as a reference. The gauge reading takes priority — dust loading varies greatly by site, so a fixed interval either wastes service life or runs the element too long.
How much does dust loading affect centrifugal compressor efficiency?
Higher inlet negative pressure reduces inlet air density. To maintain pressure and flow, the unit must increase power, raising specific power. For continuous-duty Centac units, this energy cost annualized typically far exceeds the cost of the element.
Can I blow it clean and reuse it?
No. This is a dry disposable element, not designed to be cleaned. Back-blowing with compressed air damages the media fiber structure and creates invisible channels that let unfiltered air pass through — 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. For water-cooled units, also check the cooler water side for scaling, which directly affects interstage temperature. Also be sure to check the differential pressure gauge impulse lines for blockage.
Can this element be used interchangeably with a screw compressor air filter?
No. This element weighs about 5.4 kg, two to three times a screw compressor air filter. Its dimensions, filtration area and resistance characteristics are designed for the high intake volumes of centrifugal compressors — 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 part itself — do not judge by name.
How do I confirm dimensions?
Use the measured old part (outer diameter, inner diameter, height) or request a specification drawing from Ingersoll Rand. Do not substitute other part numbers based on weight or appearance.
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 do I confirm the part number 100%?
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 catalog; ③ read the part number on the old element itself. Step three 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 multistage multi-shaft gear-driven configurations |
| 2 | Centac C series | Common models include C400, C700, C700e, C1000, C2000, C3000, etc. |
Background on Centac models
Centac is Ingersoll Rand's centrifugal compressed air brand, using multi-shaft internal gear drive and multistage compression. Output flow covers roughly 720–51,000 m³/h depending on model, with pressure range roughly 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 quality 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 have 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 cross-reference by serial number.
Related Parts
Seven components in the Centac inlet and lubrication systems 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 manuals) | Verify the part number on the old part; do not confuse with 67754101 |
| Differential Pressure Gauge | On the inlet filter housing | Indicates element dust loading; authoritative basis for replacement 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 | On the intake duct | Reduces intake noise; some models also straighten airflow | Check for corrosion perforation and loose silencing material |
| Intercooler Tube Bundles | Between compression stages | Lowers interstage air temperature; key to centrifugal compressor 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 maintenance: The value of centrifugal compressor maintenance centers on efficiency preservation. Each time the inlet element is replaced, check 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 part of annual planned maintenance — do not wait until efficiency drops noticeably.