Product
Ingersoll Rand Centac Inlet Air Filter Element 67754101 | OEM Centrifugal Compressor Part
Ingersoll Rand 67754101 inlet air filter element for Centac, Centac C, and CN series centrifugal compressors. 5–10 μm filtration, ≥98% efficiency, 5.4 kg net weight. Protects impellers and intercoolers in oil-free machines. Export-ready with serial-number fitment verification.
- Export packaging & documentation support
- OEM / ODM customization available
- Sample and bulk order workflow
Product Overview
67754101 is the Ingersoll Rand inlet air filter element (Element, Inlet Air Filter) for Centac centrifugal air compressors. It installs inside the inlet filter housing, upstream of the inlet guide vanes and first-stage impeller.
Centrifugal compressors accelerate air through high-speed impellers and convert velocity into pressure via diffusers. 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 typical screw compressor filters: approximately 5.4 kg (11.94 lbs) net, two to three times the weight of standard rotary screw inlet filters (usually 1–3 kg). This reflects the high inlet flow of Centac machines — inlet volumes can reach tens to hundreds of cubic meters per minute, requiring greater filtration area to maintain low face velocity and low resistance.
Centrifugal compressors are 100% oil-free: no lubricating oil circulates through the compression chamber to carry away contaminants. Dust that enters deposits on impellers, diffusers, and intercooler tubes. Impeller fouling alters dynamic balance and aerodynamic efficiency; intercooler tube fouling raises interstage temperatures and reduces overall efficiency. Centac units are often continuous-duty main assets — the cost of one unplanned shutdown typically far exceeds the price of the filter element itself.
Specifications
| Item | Value |
|---|---|
| Part Number | 67754101 |
| Description | 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% (for particles ≥5 μm) |
| Recommended Change Interval | Approx. 2,000 hours, or per inlet differential pressure gauge |
Filtration Performance
| Parameter | Value / Note |
|---|---|
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% (for particles ≥5 μm) |
| Initial Pressure Drop | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Alarm / Final Resistance | Per machine inlet differential pressure gauge |
| Test Standard | ISO 5011 (evaluates efficiency, inlet resistance, dust holding capacity) |
Why centrifugal compressors are more sensitive to inlet cleanliness: Centac impellers rotate at tens of thousands of RPM; blade passages are narrow, and particle impact velocities are much higher than in screw rotors. Intercooler tube fouling requires shutdown and disassembly to clean — unplanned overhaul work.
Construction & Materials
| Item | Value / Note |
|---|---|
| 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) + polyurethane adhesive |
| Seal | Nitrile rubber (NBR) gasket |
| Bonding | Polyurethane (PU) hot-melt adhesive |
Operating Conditions
| 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 Resistance | Withstands machine inlet alarm differential pressure without collapse |
| Special Features | No flame-retardant, anti-static, or special coating noted for this model |
Service Life & Storage
| Parameter | Value / Note |
|---|---|
| Service Life | Approx. 2,000 hours |
| Actual Change Interval | Per machine 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) |
Note on change intervals: While 2,000 hours is a common reference, an alternative recommendation of "every 8,000 hours or annually" is often cited for rotary screw applications. For Centac centrifugal compressors, the inlet differential pressure gauge reading is the most reliable indicator — actual dust loading varies widely by site.
Installation & Maintenance
Centrifugal compressor work differs from screw compressor work: the impeller has significant rotational inertia; wait for the controller to confirm zero speed. A single job takes about 40–60 minutes; the 5.4 kg element requires safe lifting and handling, possibly two people or mechanical assistance.
Stop machine, confirm zero speed, lock out/tag out. Do not rely on audible cues. Verify controller displays zero speed and no inertial rotation is heard.
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. For large housings, support the cover before releasing the final fastener.
Remove old element and inspect housing for dust tracks. Support the heavy element to avoid crushing the filter media. Look for dust trails on the housing interior — these indicate seal bypass. No trails means the seal was effective.
Clean housing and sealing surfaces. Wipe with a dry, lint-free cloth. Do not blow compressed air into the housing (it drives dust into the inlet). Ensure the sealing surface is flat, free of pits or corrosion.
Verify the new element. Compare with the old part: part number, dimensions, seal integrity, no media damage. Part number and dimensions must match before installation. Confirm dimensions by measurement (see Specifications).
Install new element and confirm seating. Place 67754101 into the housing; ensure it seats fully, the seal contacts evenly without pinching, and the element is centered. Even compression marks around the seal indicate correct seating.
Reinstall end cover and check differential pressure gauge lines. Tighten fasteners evenly in a diagonal pattern. Before startup, confirm the inlet differential pressure gauge impulse lines are clear, unobstructed, and not frozen. A blocked line gives a false "clean" reading and can lead to over-extended element use.
Start per centrifugal compressor procedure and verify. After stable operation, read inlet differential pressure — it should return to the clean-element baseline. Listen for air leaks. Record date, running hours, and differential pressure reading.
Centrifugal-specific rule: The consequences of seal bypass are magnified in oil-free centrifugal compressors. Unlike screw compressors where oil carries away some particles, all particles deposit on impellers and coolers — a single seal failure can require impeller dynamic balancing.
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; exact fitment requires the machine nameplate and serial number.
How do I know when to replace it?
Two methods: ① Read the machine inlet differential pressure gauge (most reliable, reflects actual dust loading); ② Use the 2,000-hour reference interval. The gauge takes priority — dust loading varies greatly by site, and fixed-interval changes either waste life or risk over-extended operation.
How much does a dirty element affect centrifugal compressor efficiency?
Increased inlet vacuum reduces inlet air density. The machine must increase power to maintain pressure and flow, raising specific power. For continuous-duty Centac units, this energy penalty over a year typically far exceeds the element cost.
Can I clean and reuse it?
No. This is a dry disposable element, not designed for cleaning. Blowing with compressed air damages the filter media structure and creates invisible channels that let unfiltered air pass — more dangerous than not changing it.
What else should I check during replacement?
Inlet guide vane linkage, intake silencer, intercooler tube bundles, and housing sealing surfaces. For water-cooled models, also check cooler water-side scaling, which directly affects interstage temperature. Always verify differential pressure gauge impulse lines are clear.
Can this be interchanged with a screw compressor filter?
No. At approx. 5.4 kg net, it is 2–3 times the weight of a screw compressor inlet filter. Dimensions, filtration area, and resistance characteristics are designed for high-flow centrifugal compressor conditions; 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 they are different part numbers. Read the number on the old part before ordering — do not judge by name.
How do I confirm dimensions?
Measure the 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 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. Confirm at inquiry based on current stock and shipping schedules.
How can I be 100% sure of the correct part number?
Three steps: ① Check the machine nameplate to confirm it is a Centac series; ② Provide the serial number for cross-reference against the centrifugal compressor parts catalog; ③ Read the part number on the old element. Step ③ is the most reliable.
Compatible Models
This part number fits Ingersoll Rand Centac centrifugal air compressors. Compatibility range:
| No. | Model | Note |
|---|---|---|
| 1 | Centac | Main centrifugal series, including multi-stage multi-pinion gear-driven designs |
| 2 | Centac C Series | Common models include C400, C700, C700e, C1000, C2000, C3000, etc. |
Centac background: Centac is Ingersoll Rand's centrifugal compressed air brand, using multi-pinion internal gear drive and multi-stage compression. Output 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, commonly certified to ISO 8573-1 Class 0, and are widely used in electronics, pharmaceutical, petrochemical, and textile industries requiring high air purity.
Reading notes:
- The table above is a compatibility range; individual fitment must be confirmed by machine nameplate and serial number.
- Large Centac machines typically 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 your machine belongs to, provide a nameplate photo and we will cross-reference by serial number.
Related Components
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. For specific part numbers, refer to the machine's Centac parts manual.
| Component | Location | Function | Inspection Points |
|---|---|---|---|
| Intake Air Filter Core | Inlet filter housing | Similar name, different part number (67765362 in local manual) | Verify part number on old 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 volume and angle for capacity control | Check linkage for binding or looseness; vane fouling affects control accuracy |
| Intake Silencer | Inlet piping | Reduces inlet 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 fouling; for 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 & Bearing Lubrication Components | Gear speed increaser | 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 centers on efficiency preservation. Each time the inlet element is changed, 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 part of annual planned maintenance — not deferred until efficiency visibly drops.