Product
Ingersoll Rand 67754101 Inlet Air Filter Element | Centac Centrifugal Compressor
Ingersoll Rand 67754101 inlet air filter element for Centac, Centac C, and CN centrifugal compressors. 5–10 μm filtration, ≥98% efficiency, approx. 5.4 kg net weight. Export-ready with serial-number fitment 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 mounted inside the inlet filter housing, upstream of the inlet guide vanes and the first-stage impeller. Centrifugal compressors accelerate air through a high-speed impeller and convert that velocity into pressure. Air must be clean before it reaches the first-stage impeller — this element is the particle barrier protecting the 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 a standard screw compressor air filter (usually 1–3 kg). This reflects the high inlet flow of Centac machines, where large filtration area is required to maintain low face velocity and low resistance.
Centrifugal compressors are 100% oil-free: there is no lubricating oil in the compression chamber to carry contaminants away. Dust that enters deposits on the impeller, diffuser, and intercooler. Impeller fouling alters dynamic balance and aerodynamic efficiency; intercooler tube fouling raises interstage temperature and reduces overall efficiency. Centac units typically run continuously as critical equipment, and the cost of unplanned downtime usually far exceeds the cost of the filter element itself.
Core 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 |
| Construction | 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. 2000 hours, or per inlet differential pressure gauge |
Technical Specifications
Filtration Performance
| Parameter | Value / Note |
|---|---|
| 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 |
Why centrifugal compressors are more sensitive to inlet cleanliness: Centac impellers rotate at tens of thousands of RPM, and blade passages are narrow. Particle impact velocity is far higher than in screw compressors, so erosion effects are more pronounced. Once intercooler tubes foul, cleaning requires shutdown and disassembly — an unplanned overhaul.
Flow and Resistance
| Parameter | Value / Note |
|---|---|
| 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 | Higher inlet resistance → lower inlet air density → higher power required to maintain pressure and flow → higher specific power |
Pressure drop and energy consumption: Centac is a centrifugal machine whose output depends on inlet air density. As the element loads with dust, inlet vacuum rises, reducing both pressure and density at the first-stage impeller. The machine must increase speed or power to maintain set discharge pressure and flow, raising specific power. For large continuous-duty centrifugal units, this energy loss over a year typically far exceeds the cost of a replacement element — which is why Ingersoll Rand equips Centac machines with inlet differential pressure indication.
Construction and Materials
| Parameter | Value / Note |
|---|---|
| Construction | Cylindrical inlet element, installed in filter housing |
| Net Weight | Approx. 5.4 kg (11.94 lbs) |
| Sealing | End-face seal (axial compression) |
| Filter Media | Imported wood pulp filter paper (industry-common HV or Ahlstrom media) |
| Media Weight | Approx. 130 g/m² |
| Support Structure | Galvanized steel perforated inner and outer cages |
| End Caps | Metal end caps (galvanized steel) with polyurethane adhesive |
| Seal Material | NBR (nitrile rubber) gasket |
| Bonding | Polyurethane (PU) hot-melt adhesive |
Operating Limits
| Parameter | Value / Note |
|---|---|
| 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 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 |
| 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) |
On change intervals: In addition to the 2000-hour reference, a "8000 hours or annually" recommendation is sometimes cited, mainly for rotary screw applications. For Centac centrifugal machines, the inlet differential pressure gauge reading is the most reliable criterion — actual intervals vary widely with ambient dust load.
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) |
| Commonly Cited 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 filter elements. If a supplier can only provide hydraulic filter standards, request ISO 5011 or the OEM specification sheet. |
| Oil-Free Certification Context | The Centac machines this element serves are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first line of defense in maintaining that rating. |
Installation and Maintenance Steps
Centrifugal compressor work differs from screw compressor work: the impeller has significant rotational inertia, and the controller must confirm zero speed before any work begins. Each job takes approximately 40–60 minutes; depending on housing size, two people or mechanical assistance may be required (this element weighs 5.4 kg net, so stable lifting and handling measures are essential).
Shut down, confirm zero speed, lock out/tag out
Stop the machine 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 latches or fasteners evenly in a diagonal pattern. Criterion: on large housings, have someone support the cover before the last fastener is released 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 carefully to avoid crushing the filter paper. Inspect the housing interior for dust tracks — tracks indicate seal bypass, meaning unfiltered air has bypassed the seal. Criterion: no dust tracks on the interior wall means the seal was effective.Clean the housing and sealing surfaces
Wipe the interior, 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 inlet passage). Criterion: no loose dust inside; sealing surface flat with no pits or corrosion.Verify the new element
Compare with the old element item by item: part number, dimensions, seal integrity, undamaged filter paper. Criterion: part number and dimensions must match exactly before installation; dimensions for this item should be confirmed by measurement (see Technical Specifications).Install the new element and confirm seating
Place the 67754101 into the housing, confirming full seating at the bottom, seal face contact with no trapped material, and centered, non-skewed positioning. Criterion: uniform compression marks around the seal face.Reinstall the cover and check the differential pressure gauge lines
Reinstall the cover and tighten evenly in a diagonal pattern in stages. 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 and leads to over-extended element service.Start per centrifugal compressor procedure and verify
Start per the machine's specified procedure. After stable operation, read 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 in centrifugal machines. Screw compressors have lubricating oil to carry away some particles; centrifugal compression chambers are oil-free, so particles all deposit on the impeller and coolers — a single seal failure can cost an impeller dynamic balance correction.
Frequently Asked Questions
Which machines use 67754101?
Ingersoll Rand Centac centrifugal air compressors, including Centac, Centac C Series, and CN Series. The Centac model range is broad; exact fitment requires verification against 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 2000-hour interval as a reference. The differential pressure gauge takes priority — dust loads vary widely by location, so a fixed interval either wastes element life or runs it too long.
How much does element fouling affect centrifugal compressor efficiency?
Rising inlet vacuum reduces inlet air density, and the machine must increase power to maintain pressure and flow, raising specific power. Centac units are large continuous-duty machines, and this energy cost over a year typically far exceeds the element cost.
Can I blow it clean and reuse it?
No. This is a dry disposable element, not designed to be cleaned. Blowing it with compressed air damages the filter paper fiber structure and creates invisible channels that let unfiltered air pass — more dangerous than not replacing it at all.
What else should I check when replacing the element?
The inlet guide vane linkage, inlet silencer, intercooler tube bundles, and housing sealing surfaces. On water-cooled models, also check the cooler water side for scaling, which directly affects interstage temperature. Also be sure to check that the differential pressure gauge impulse lines are clear.
Can this element be used in place of a screw compressor air filter?
No. This element weighs approximately 5.4 kg net — two to three times a screw compressor air filter — and its dimensions, filtration area, and resistance characteristics are designed for the high inlet flow of centrifugal machines. The two 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. Before ordering, read the number on the old element itself — do not judge by name.
How do I confirm dimensions?
Confirm dimensions by measuring the old element (outer diameter, inner diameter, and height) or by requesting 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 approximately 3–7 days, Middle East approximately 7–10 days, Africa and Latin America approximately 10–18 days, Russia/Belarus approximately 10–15 days. Exact timing depends on stock and shipping schedule at time of inquiry.
How do I confirm the part number 100%?
Three steps: (1) check the machine nameplate to confirm it is a Centac series; (2) provide the serial number and we will cross-reference the centrifugal 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 multistage multi-shaft gear-driven construction |
| 2 | Centac C Series | Common models C400, C700, C700e, C1000, C2000, C3000, etc. |
Background on Centac models: Centac is Ingersoll Rand's centrifugal compressed air machine brand, using multi-shaft internal gear drive and multistage compression, with output flow covering approximately 720–51,000 m³/h (by model) and pressure range approximately 0.7–22.5 bar. The machines are 100% oil-free and commonly certified to ISO 8573-1 Class 0, used in electronics, pharmaceutical, petrochemical, and textile industries where air quality is critical.
Reading the table:
- The table shows the 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 machine depends on the model. Confirm the element count before ordering.
- If you are unsure which series your machine belongs to, provide a nameplate photo and we will verify by serial number.
Related Components
Seven components in the Centac inlet and lubrication systems are maintained on the same cycle as the air filter. The following lists them by location, function, and inspection points. For specific part numbers, refer to the machine Centac parts manual.
| Component | Location | Function | Inspection Points |
|---|---|---|---|
| Intake Air Filter Core | Inlet filter housing | A similarly named but different part number (67765362 in the local manual) | Verify the number on the part itself; do not confuse with 67754101 |
| Differential Pressure Gauge | On 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 | Inlet ducting | Reduces inlet noise; some models also provide airflow straightening | Check for corrosion perforation or loose silencing material |
| Intercooler Tube Bundles | Between compression stages | Reduces interstage temperature; key to centrifugal efficiency | Check air-side fouling; on 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 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 |
Companion replacement recommendation: The maintenance value of centrifugal compressors centers on efficiency retention. When replacing the inlet air filter element, also inspect the inlet differential pressure gauge, guide vane mechanism, and intercooler condition to make full use of each shutdown window. Cooler cleaning and impeller inspection should be included in the annual planned maintenance schedule — do not wait until efficiency visibly drops.