Product
Ingersoll Rand 67754101 Centac Inlet Air Filter Element | OEM Centrifugal Compressor 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 fast dispatch and serial number verification support.
- 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.
Because centrifugal compressors rely on high-speed impeller rotation to accelerate air and convert it into pressure, the air must be clean before it reaches the first-stage impeller. This filter element acts as the particle barrier protecting the impeller blades and intercooler passages.
This element is noticeably larger and heavier than standard screw compressor filters: approximately 5.4 kg (11.94 lbs) net weight — two to three times the weight of a typical screw compressor air filter (usually 1–3 kg). This reflects the high inlet flow of Centac units, which can range from 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. There is no lubricating oil circulating in the compression chamber to carry away contaminants. Dust that enters will deposit on the impeller, diffuser, and intercooler. Impeller fouling changes dynamic balance and aerodynamic efficiency; intercooler tube fouling directly raises interstage temperatures and reduces overall efficiency. Centac units are often continuous-duty main equipment, where the cost of one unplanned shutdown far exceeds the price of the filter element.
Key Specifications
| Item | Value |
|---|---|
| Part Number | 67754101 |
| Name | Inlet Air Filter Element / Element, Inlet Air Filter |
| Brand | Ingersoll Rand |
| Compatible Models | Centac, Centac C Series, CN Series centrifugal compressors |
| Manual Ref. | 1X9428 |
| Construction | Dry disposable inlet filter element |
| Net Weight | Approx. 5.4 kg (11.94 lbs) |
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% |
| Recommended Replacement | Approx. 2000 hours or 3 months, or per inlet differential pressure gauge |
Technical Specifications
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 filters are characterized by ISO 5011 efficiency, inlet resistance, and dust holding capacity |
| Dust Holding Capacity | — |
Centrifugal compressor impellers rotate at tens of thousands of RPM with narrow blade passages. Particle impact velocity on the impeller is much higher than on screw compressor rotors, making erosion more significant for the same particle size. Once intercooler tubes foul, cleaning requires shutdown and disassembly — an unplanned overhaul.
Flow & Resistance
| Parameter | Value / Notes |
|---|---|
| Rated Air Flow | — |
| Filter Face Velocity | — |
| Initial Pressure Drop | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Operating Differential Range | From new element initial resistance to alarm resistance |
| Alarm / Final Resistance | Per unit 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 depends on inlet air density. As dust accumulates and inlet vacuum rises, the pressure and density of air entering the first-stage impeller drop. The unit must increase speed or power to maintain set discharge pressure and flow, raising specific power. For continuous-duty medium-to-large centrifugal units, this annual energy loss typically far exceeds the cost of a filter element — which is why Ingersoll Rand equips Centac units with inlet differential pressure indication.
Construction & Installation
| Parameter | Value / Notes |
|---|---|
| Dimensions | — |
| Construction | Cylindrical inlet filter element (installed in filter housing) |
| Net Weight | Approx. 5.4 kg (11.94 lbs) |
| Effective Filtration Area | — |
| Pleat Count / Pitch | — |
| Mounting Interface | Installed in Centac inlet filter housing, end-face compression seal |
| Sealing | End-face seal (axial compression) |
Dimensions: Before ordering, confirm dimensions by: ① measuring the old element (OD, ID, height — recommended); ② requesting the specification drawing from Ingersoll Rand; ③ providing photos and measurements for our review. Do not cross-reference by weight or appearance alone.
For reference: this element weighs approx. 5.4 kg — 2–3 times a standard screw compressor air filter (1–3 kg). It is a large centrifugal compressor element.
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 | Galvanized steel perforated support (inner cage + outer guard) |
| End Caps | Metal end caps (galvanized steel) + polyurethane adhesive |
| Seal | NBR (nitrile rubber) seal ring |
| Adhesive | Polyurethane (PU) hot melt |
Operating Tolerance
| 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 Pressure | Element should withstand unit inlet alarm differential pressure without collapse |
| Special Features | No flame-retardant, anti-static, or special coating noted for this model |
Service Life & Maintenance
| Parameter | Value / Notes |
|---|---|
| Service Life | Approx. 2000 hours or 3 months |
| Actual Replacement | Per unit 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) |
Replacement interval: Standard is 2000 hours or 3 months, whichever comes first. For Centac centrifugal compressors, the inlet differential pressure gauge reading is more reliable — actual intervals vary significantly with dust load.
Standards
| Item | Content |
|---|---|
| Product Standard | ISO 5011 (inlet air filters for internal combustion engines and compressors — performance test), 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) |
| Commonly 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 the OEM specification. |
| 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 oil-free class. |
Installation & Maintenance Steps
Centrifugal compressor work differs from screw compressors: the impeller has significant rotational inertia and must be confirmed at zero speed by the controller. Each job takes approximately 40–60 minutes; depending on housing size, two people or mechanical assistance may be needed (this element weighs 5.4 kg — ensure safe lifting and handling).
- Shut down, confirm zero speed, lock out/tag out. Stop the unit and wait for controller zero-speed confirmation (do not judge by sound). Disconnect main power and lock out/tag out. Criteria: 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 latches or fasteners evenly in a diagonal pattern. Criteria: on large housings, have someone support the cover before the last fastener is released to prevent sudden drop.
- Remove the old element and inspect housing for dust trails. Pull out the old element. It is heavy — support it firmly to avoid crushing the filter paper. Look for dust trail bands on the housing inner wall; trails indicate seal bypass, meaning unfiltered air has bypassed the seal. Criteria: no dust trails on inner wall means good sealing.
- 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 interior (it will drive dust into the inlet duct). Criteria: no loose dust on inner wall; sealing surface flat, no pits or corrosion pitting.
- Verify the new element. Compare with the old part: part number, dimensions, seal integrity, no filter paper damage. Criteria: 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 67754101 into the housing; confirm full seating at the bottom, seal face contact with no trapped material, and centered element without tilting. Criteria: even compression marks around the seal face.
- Reinstall the cover and check the differential pressure gauge impulse line. Reinstall the cover and tighten evenly in diagonal stages. Before startup, confirm the inlet differential pressure gauge impulse line is clear, not blocked, and not frozen. Criteria: clear line; a blocked impulse line gives a "false clean" reading, causing the element to be used beyond its life.
- Start per centrifugal compressor procedure and verify. Start per unit procedure. After stable operation, read inlet differential pressure — it should return to the clean element baseline range; listen for air leaks at the housing. Criteria: normal differential reading, no abnormal noise; record date, running hours, and differential reading.
Centrifugal compressor rule: The danger of seal bypass is amplified in centrifugal machines. Screw compressors have lubricating 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 balancing job.
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; exact fit requires nameplate and serial number verification.
How do I know when to replace it?
Two ways: ① read the unit inlet differential pressure gauge (most reliable, reflects actual dust load); ② use 2000 hours or 3 months as a reference. The differential pressure gauge takes priority — dust loads vary greatly by location, so fixed intervals either waste life or run overdue.
How much does dust accumulation affect centrifugal compressor efficiency?
Higher inlet vacuum lowers inlet air density. The unit must increase power to maintain pressure and flow, raising specific power. Centac is a continuous-duty medium-to-large unit; this annual energy loss typically far exceeds the filter cost.
Can I blow it clean and reuse it?
No. This is a dry disposable element, not designed for cleaning. Blowing with compressed air damages the filter paper 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 filter?
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. Also verify the differential pressure gauge impulse line is clear.
Can this filter be interchanged with a screw compressor air filter?
No. This element weighs approx. 5.4 kg — 2–3 times a screw compressor air filter. Its dimensions, filtration area, and resistance characteristics are designed for the high inlet flow 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 they are different part numbers. Read the number on the old element body before ordering — do not judge by name.
How do I confirm dimensions?
Confirm dimensions by measuring the old element (OD, ID, height) or requesting the specification drawing from Ingersoll Rand. Do not cross-reference 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 time of inquiry.
How do I 100% confirm 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-reference against the centrifugal compressor parts catalog; ③ read the part number on the old filter element body. Step ③ is 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 in the Centac family |
About Centac: Centac is Ingersoll Rand's centrifugal compressed air brand, using multi-shaft internal gear drive and multi-stage compression. Output flow ranges from approximately 720–51,000 m³/h (by model), with pressure range approximately 0.7–22.5 bar. Units are 100% oil-free and commonly certified to ISO 8573-1 Class 0, widely used in electronics, pharmaceutical, petrochemical, and textile industries requiring high air purity.
Reading Notes
- The table above shows the 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 unit's filter configuration before ordering.
- If unsure which series the unit belongs to, provide a nameplate photo and we will cross-reference by serial number.
Related Parts
The Centac centrifugal compressor inlet and lubrication systems have 7 components maintained on the same cycle as the air filter. Listed below by location — function — 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 body number when ordering; do not confuse with 67754101 |
| Differential Pressure Gauge | On inlet filter housing | Indicates element dust load; authoritative basis for replacement timing | Check needle returns properly; 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 sticking or looseness; vane fouling affects regulation accuracy |
| Intake Silencer | On inlet duct | Reduces inlet noise; some models also act as flow straightener | Check for corrosion perforation, silencer material detachment |
| Intercooler Tube Bundles | Between compression stages | Reduces interstage temperature; key to centrifugal efficiency | Check air-side fouling; water-cooled models also 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 unit requirements; monitor oil level and temperature |
Recommended companion replacement: Centrifugal compressor maintenance value centers on "efficiency maintenance." We recommend checking the inlet differential pressure gauge, guide vane mechanism, and intercooler condition each time the inlet filter is replaced, making full use of the shutdown window. Cooler cleaning and impeller inspection should be included in annual planned maintenance — do not wait until efficiency noticeably drops.
Procurement & OEM Support
We supply Ingersoll Rand Centac inlet air filter element 67754101 for importers, distributors, and maintenance service providers across Southeast Asia and other export markets. OEM and private-label options are available for qualified volume orders.
- Compatibility verification: Provide your unit nameplate photo and serial number — we cross-reference against the Centac parts catalog to confirm fit before shipment.
- Export packing: Standard export cartons with protective wrapping to prevent filter paper damage in transit.
- Lead time: Stock items dispatch within 24 hours. Southeast Asia 3–7 days; other regions 7–18 days depending on destination and shipping method.
- Documents: Datasheet and packing list provided. Certificates available only when present in source materials.
- Sampling: Available — fees and lead time confirmed per sales quotation.
To request a quotation, datasheet, or compatibility check, send us your required quantity, unit model, and serial number. We will confirm fit and pricing promptly.