Ingersoll Rand 67754101 Centac Inlet Air Filter Element | OEM Export

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 first-stage impeller. Because Centac machines are 100% oil-free, the element is the primary particle barrier protecting the impeller blades and intercooler passages from dust ingress.

This element is significantly larger and heavier than typical screw compressor filters: approximately 5.4 kg (11.94 lbs) net, roughly two to three times the weight of a standard rotary screw air filter (usually 1–3 kg). This reflects the high inlet flow of centrifugal machines and the larger filtration area required to maintain low face velocity and low resistance.

Key Specifications

Item	Value
Part Number	67754101
Description	Element, Inlet Air Filter
Brand	Ingersoll Rand
Compatible Machines	Centac, Centac C Series, CN Series centrifugal compressors
Manual Reference	1X9428
Construction	Dry disposable 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

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

Centrifugal impellers operate at very high speeds with narrow blade passages. Particles impact the impeller at higher relative velocities than in screw rotors, making erosion more severe. Once the intercooler tube bundle fouls, cleaning requires shutdown and disassembly — unplanned overhaul work.

Flow and Resistance

Parameter	Value / Note
Initial Pressure Drop	Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O)
Alarm / Final Resistance	Per machine inlet differential pressure gauge
Pressure Drop vs. Energy	Higher inlet resistance reduces inlet air density; the machine draws more power to maintain pressure and flow, raising specific power

As the element loads with dust, inlet negative pressure rises, reducing air density at the first-stage impeller. To hold discharge pressure and flow, the machine must increase speed or power. On continuously running Centac units, this energy penalty typically exceeds the cost of the filter element over a year — which is why Ingersoll Rand specifies an inlet differential pressure indicator.

Construction and Materials

Parameter	Value / Note
Media	Imported wood pulp filter paper (industry-common HV or Ahlstrom)
Media Weight	Approx. 130 g/m²
Support	Galvanized steel perforated inner and outer cages
End Caps	Metal end caps (galvanized steel) with polyurethane adhesive
Seal	NBR rubber seal ring
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	Media 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 Storage

Parameter	Value / Note
Service Life	Approx. 2,000 hours
Actual Change Interval	Per machine inlet differential pressure gauge; shorten in coastal (salt mist), desert (fine dust), or industrial (process dust) environments
Shelf Life	Approx. 2–3 years (unopened, dry, ventilated storage)

Some references cite an 8,000-hour or annual interval, often for rotary screw applications. For Centac centrifugal machines, the inlet differential pressure gauge is the most reliable indicator — actual intervals vary widely with dust loading.

Standards

Item	Detail
Primary Product Standard	ISO 5011 (inlet air filters for internal combustion engines and compressors — performance testing): efficiency, inlet resistance, dust holding capacity
Other Referenced Standards	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
Note on Applicability	The ISO 29xx / 37xx series are general test methods for hydraulic filter elements. If a supplier offers only hydraulic filter standards, request ISO 5011 or the OEM specification sheet.
Oil-Free Context	Centac machines served by this element are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first line of defense for maintaining that class.

Maintenance and Installation Steps

Centrifugal machine work differs from screw compressors: the impeller has significant rotational inertia, and the controller must confirm zero speed. Allow 40–60 minutes per job; the 5.4 kg element requires safe handling and lifting measures.

1. 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). Isolate main power and apply lockout/tagout. Criterion: controller shows zero speed, no inertial rotation noise.
2. 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 cover before releasing the last fastener to prevent sudden drop.
3. Remove the old element and inspect the housing for dust tracks. Pull out the old element; it is heavy, so support it to avoid crushing the media. Look for dust tracks on the inner housing wall — these indicate seal bypass and unfiltered air leakage. Criterion: no dust tracks means the seal was effective.
4. Clean the housing and sealing surfaces. Wipe the inner walls, bottom, and sealing surfaces with a dry, lint-free cloth. Do not blow compressed air directly into the housing (it drives dust into the inlet). Criterion: no loose dust, sealing surface flat with no pits or corrosion.
5. Verify the new element. Compare with the old element: part number, dimensions, seal integrity, media free of damage. Criterion: part number and dimensions must match before installation; measure dimensions to confirm.
6. Install the new element and confirm seating. Place the 67754101 into the housing; ensure it fully seats at the bottom, the seal contacts evenly with no trapped material, and the element is centered. Criterion: uniform compression marks around the seal.
7. Reinstall the cover and check the differential pressure gauge lines. Refit the cover and tighten evenly in a diagonal sequence. Before start-up, confirm the inlet differential pressure gauge impulse lines are clear, not blocked, and not frozen. Criterion: lines clear; a blocked line gives a false "clean" reading and can lead to overdue element use.
8. Start per centrifugal machine procedure and verify. Start according to 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: Seal bypass is more serious on centrifugal machines. Screw compressors have oil to carry away some particles; centrifugal compression chambers are oil-free, so all particles 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 family spans many models; exact fitment requires 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 the 2,000-hour interval as a reference. The gauge reading takes priority — dust loading varies widely by site, so fixed intervals either waste element life or risk overrun.

How much does dust loading affect centrifugal efficiency?
Higher inlet negative pressure reduces inlet air density; the machine draws more power to maintain pressure and flow, raising specific power. On continuously running Centac units, this energy cost typically exceeds the element cost over a year.

Can I blow it clean and reuse it?
No. This is a dry disposable element, not designed for cleaning. Back-blowing with compressed air damages the media fiber structure and creates invisible channels that let unfiltered air pass — more dangerous than not replacing it.

What else should I check when replacing the element?
Inlet guide vane linkage, intake 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. Always check the differential pressure gauge impulse lines for blockage.

Can this element be interchanged with a screw compressor air filter?
No. At approximately 5.4 kg net, it is two to three times the weight of a screw compressor filter. 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 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 part itself — do not rely on the name.

How do I confirm dimensions?
Measure the old element (outer diameter, inner diameter, height) or request the Ingersoll Rand specification drawing. Do not cross-reference other part numbers 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. Confirm at inquiry based on stock and shipping schedule.

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 for cross-reference against the centrifugal parts catalog; ③ read the part number on the old element. Step 3 is the most reliable.

Compatible Machine Models

This part number fits Ingersoll Rand Centac centrifugal air compressors:

No.	Compatible Model	Note
1	Centac	Main centrifugal series, including multi-stage, multi-pinion gear-driven configurations
2	Centac C Series	Common models include C400, C700, C700e, C1000, C2000, C3000, etc.

Centac background: Centac is Ingersoll Rand's centrifugal compressed air machine brand, using multi-pinion integral gear drive and multi-stage compression. Output flow ranges from approximately 720 to 51,000 m³/h (model dependent), with pressure from approximately 0.7 to 22.5 bar. Machines are 100% oil-free and commonly certified to ISO 8573-1 Class 0, serving electronics, pharmaceutical, petrochemical, and textile industries where air quality is critical.

Reading the table:

• The table shows the compatible range; individual fitment must be confirmed by machine nameplate and serial number.
• Large Centac machines often use multiple filter elements in the inlet system; the number per machine varies by model. Confirm the element count before ordering.
• If unsure which series the 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 maintained on a similar cycle. Listed by location, function, and inspection point; refer to the Centac parts manual for specific part numbers.

Component	Location	Function	Inspection Point
Intake Air Filter Core	Inlet filter housing	Another part number with a similar name (67765362 in local manuals)	Verify the number on the part; do not confuse with 67754101
Differential Pressure Gauge	On the inlet filter housing	Indicates element dust loading; the authoritative replacement indicator	Check needle returns properly; 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 flow straightening	Check for corrosion perforation or silencer material shedding
Intercooler Tube Bundles	Between compression stages	Reduces interstage air 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 bundle 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 machine requirements; monitor oil level and temperature

Recommended companion checks: Centrifugal maintenance value centers on efficiency retention. Each time the inlet element is replaced, 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 the annual planned maintenance — do not wait for a noticeable efficiency drop.