Product
Ingersoll Rand Centac Inlet Air Filter Element 67754101 | 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.
- 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 Centac compressors are 100% oil-free, the inlet filter is the primary barrier protecting the impeller, diffuser, and intercooler from particulate contamination.
This element is significantly larger and heavier than typical screw compressor filters: net weight is approximately 5.4 kg (11.94 lbs), two to three times that of a standard screw compressor air filter (usually 1–3 kg). This reflects the high inlet flow rates of centrifugal machines, which can reach from tens to hundreds of cubic meters per minute, requiring a larger filtration area to maintain low face velocity and low pressure drop.
Core 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 air 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 Parameters
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, inlet resistance, and dust holding capacity |
| Dust Holding Capacity | — |
Centrifugal compressors are more sensitive to inlet cleanliness than screw compressors. Centac impellers rotate at tens of thousands of RPM, and blade passages are narrow. Particles impact the impeller at much higher relative velocities, making erosion more significant. Once the intercooler tube bundle fouls, cleaning requires shutdown and disassembly, representing unplanned overhaul work.
Flow and Pressure Drop
| Parameter | Value / Note |
|---|---|
| Rated Air Flow | — |
| Initial Pressure Drop | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Alarm / Final Resistance | Determined by the machine inlet differential pressure gauge |
| Pressure Drop vs. Energy | Increased inlet resistance → lower inlet density → higher power required to maintain pressure and flow → higher specific power |
As the filter loads with dust, inlet negative pressure rises, reducing the pressure and density of air entering the first-stage impeller. The compressor must increase speed or power to maintain set discharge pressure and flow, raising specific power. For continuous-duty Centac machines, this energy penalty over a year typically far exceeds the cost of the filter element.
Construction and Materials
| Parameter | Value / Note |
|---|---|
| Type | Cylindrical inlet element, installed in filter housing |
| Net Weight | Approx. 5.4 kg (11.94 lbs) |
| Filter Media | Imported wood pulp filter paper (industry-standard HV or Ahlstrom) |
| Media Weight | Approx. 130 g/m² |
| Inner/Outer Support | Galvanized steel perforated cage (inner) + 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 Pressure | Element must withstand machine inlet alarm differential pressure without collapse |
| Special Features | No flame-retardant, anti-static, or special coating noted for this model |
Service Life and Maintenance
| Parameter | Value / Note |
|---|---|
| Service Life | Approx. 2000 hours or 3 months |
| Actual Replacement | Per 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 more reliable, as actual dust loading varies widely by environment.
Standards
| Item | Content |
|---|---|
| Applicable Product Standard | ISO 5011 (Inlet air cleaning equipment for internal combustion engines and compressors — performance testing), evaluating filtration 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 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 OEM specifications. |
| Oil-Free Certification Background | Centac compressors served by this element are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first line of defense for maintaining oil-free class. |
Installation and Maintenance Steps
Centrifugal compressor work differs from screw compressors: the impeller has significant inertia, and the controller must confirm zero speed. A single job takes approximately 40–60 minutes; due to the 5.4 kg net weight, two people or mechanical assistance may be required for safe handling.
Shutdown, confirm zero speed, lockout/tagout
Stop the compressor and wait for the controller to confirm zero speed (do not judge by sound). Disconnect 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 loosening the last fastener to prevent sudden drop.Remove old element and inspect for dust traces
Pull out the old element. It is heavy; support it carefully to avoid crushing the filter paper. Inspect the housing interior for dust tracks — these indicate seal bypass, meaning unfiltered air has bypassed the seal. Criterion: no dust tracks on interior walls means good sealing.Clean housing and sealing surfaces
Wipe the housing interior, bottom, and sealing surfaces with a dry, lint-free cloth. Do not blow compressed air directly into the housing (it will blow dust into the inlet duct). Criterion: no loose dust inside, sealing surface flat with no pits or corrosion.Verify new element
Compare with the old element: part number, dimensions, seal integrity, filter paper undamaged. Criterion: part number and dimensions must match before installation; dimensions should be measured (see Section 3).Install new element and confirm seating
Place the 67754101 into the housing, ensuring it is fully seated at the bottom, the seal is flush with no trapped material, and the element is centered without tilting. Criterion: uniform compression marks around the seal.Reinstall cover and check differential pressure lines
Replace 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, causing the element to be used beyond its service life.Start per centrifugal compressor procedure and verify
Start according to the machine's specified 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 pressure reading, no abnormal noise; record date, running hours, and differential pressure reading.
Centrifugal-specific rule: the danger of seal bypass is amplified on centrifugal compressors. Screw compressors have lubricating oil that carries away some particles; centrifugal compressor compression chambers are oil-free, so all particles deposit on the impeller and coolers. A single seal failure can cost an impeller dynamic balancing correction.
Frequently Asked Questions
Which machines use 67754101?
Ingersoll Rand Centac centrifugal air compressors: Centac, Centac C Series, and CN Series. The Centac model range is broad; exact fit requires verification against the machine nameplate and serial number.
How do I know when to replace it?
Two ways: ① Read the machine 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, as dust loading varies greatly by location; fixed intervals either waste life or risk overrun.
How much does dust loading affect centrifugal compressor efficiency?
Increased inlet negative pressure reduces inlet density, requiring more power to maintain pressure and flow, raising specific power. Centac is a continuous-duty medium-to-large machine; this energy penalty over a year 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 lines are clear.
Can this filter be interchanged with a screw compressor air filter?
No. At approximately 5.4 kg net weight, it is 2–3 times heavier than a screw compressor air filter. Dimensions, filtration area, and resistance characteristics are designed for the high inlet flow of centrifugal compressors; they are not interchangeable.
Are 67754101 and 67765362 the same part?
No. Both part 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 itself before ordering; do not judge by name.
How do I confirm dimensions?
Confirm dimensions by measuring the old element (outside diameter, inside diameter, height — three measurements recommended), or request a specification drawing from Ingersoll Rand. Do not interchange with 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 time of inquiry.
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 filter 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-shaft gear-driven configurations |
| 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 models: Centac is Ingersoll Rand's centrifugal compressed air machine brand, using multi-shaft internal gear drive and multi-stage compression. Output flow covers approximately 720–51,000 m³/h (depending on model), with pressure range approximately 0.7–22.5 bar. Machines are 100% oil-free and generally certified to ISO 8573-1 Class 0, widely used in electronics, pharmaceuticals, petrochemicals, and textiles where air purity is critical.
- The table above shows the compatibility range; individual fit must be confirmed by machine nameplate and serial number.
- Large Centac machines typically have multiple filter elements in the inlet system; the number per machine varies by model. Confirm the machine's filter configuration before ordering.
- If unsure which series the machine belongs to, provide a nameplate photo and we will cross-reference by serial number.
Related Parts
Seven components in the Centac centrifugal compressor inlet and lubrication systems are maintained on the same cycle as the air 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 | 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 filter 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 | 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; for water-cooled models, also check water-side scaling |
| Aftercooler | After final stage discharge | Cools discharge air to set temperature | Tube bundle blockage directly raises discharge temperature |
| Gearbox and 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 replacement: Centrifugal compressor maintenance value centers on efficiency preservation. At each inlet filter replacement, 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 annual planned maintenance, not delayed until efficiency visibly drops.