Ingersoll Rand 67754101 Centac Inlet Air Filter Element | 5.4 kg

Product Overview

67754101 is the inlet air filter element 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.

In a centrifugal compressor, the impeller accelerates air at high speed and the diffuser converts 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 noticeably larger and heavier than typical rotary-screw air filter elements: approximately 5.4 kg (11.94 lbs) net, two to three times the weight of screw compressor elements (usually 1–3 kg). That reflects the high inlet flow of Centac machines, which can range from tens to hundreds of cubic meters per minute. A larger filtration area keeps face velocity and pressure drop low.

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 changes dynamic balance and aerodynamic efficiency; intercooler tube fouling raises interstage temperature and reduces overall efficiency. Centac units are often continuous-duty prime movers, so the cost of an unplanned shutdown usually far exceeds the cost of the element itself.

Key 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%
Recommended Change Interval	Approx. 2,000 hours, or per inlet differential pressure gauge

Technical Parameters

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 elements are characterized per ISO 5011 by efficiency, inlet resistance and dust holding capacity

Centac impellers rotate at tens of thousands of rpm with narrow blade passages. Particles impact the impeller at higher relative speed than in a screw rotor, so erosion effects are more pronounced. Once intercooler tubes foul, cleaning requires shutdown and disassembly — unplanned overhaul work.

Flow and Resistance

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

Construction and Materials

Parameter	Value / Notes
Filter Media	Imported wood pulp filter paper (industry-common 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	NBR rubber seal ring
Bonding	Polyurethane (PU) hot-melt adhesive

Operating Limits

Parameter	Value / Notes
Operating Temperature	−10 to +100 °C
Relative Humidity	≤80% RH, non-condensing
Burst Strength	Filter paper approx. 200–400 kPa (per ISO 2758)
Collapse Resistance	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 and Maintenance

Parameter	Value / Notes
Service Life	Approx. 2,000 hours
Actual Change Interval	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)

Standards

Item	Details
Product Standard	ISO 5011 (inlet air filters for internal combustion engines and compressors — performance testing), evaluating efficiency, inlet resistance and dust holding capacity
Other Common References	ANSI/CAGI ADF 400-1999, ISO 8573-4
Industry Test Standards	ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968
Note on Standards	The ISO 29xx / 37xx series are general test methods for hydraulic filter elements. If a supplier can only provide hydraulic standards, request ISO 5011 or the OEM specification sheet.
Oil-Free Background	Centac units served by this element are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first safeguard for maintaining that class

Installation and Maintenance Steps

Centrifugal compressor work differs from screw compressor work: the impeller has high inertia, so the controller must confirm zero speed. Allow 40–60 minutes per job; the 5.4 kg element requires safe lifting and handling, possibly two people or mechanical assistance.

1. Stop, confirm zero speed, lock out/tag out. Stop the unit and wait for the controller to confirm zero speed (do not judge by sound). Isolate main power and lock out/tag out.
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. On large housings, support the cover before releasing the last fastener.
3. Remove the old element and inspect for dust tracks. Withdraw the old element carefully — it is heavy, so avoid crushing the filter media. Look for dust tracks on the housing inner wall; tracks indicate seal bypass.
4. Clean the housing and sealing surface. Wipe the inner wall, bottom and sealing surface with a dry, lint-free cloth. Do not blow compressed air into the housing interior.
5. Verify the new element. Compare part number, dimensions, seal integrity and media condition against the old element. Install only if the part number and dimensions match.
6. Install the new element and confirm seating. Place the 67754101 into the housing, confirm full seating at the bottom, even seal contact and no off-center tilt.
7. Reinstall the cover and check the differential pressure gauge lines. Refit the cover and tighten diagonally in stages. Before start-up, confirm the inlet differential pressure gauge impulse lines are clear, not blocked and not frozen.
8. Start per centrifugal compressor procedure and verify. After stable operation, read the inlet differential pressure; it should return to the clean-element baseline. Listen for housing leaks. Record date, running hours and differential pressure.

Frequently Asked Questions

Which machines use 67754101?
Ingersoll Rand Centac centrifugal compressors, including Centac, Centac C Series and CN Series. Exact fit requires the unit nameplate and serial number.

How do I know when to replace it?
Two ways: read the unit inlet differential pressure gauge (most reliable, reflects actual dust loading), or use the 2,000-hour interval as a reference. The gauge reading takes priority because dust loading varies widely by site.

How much does dust loading affect centrifugal efficiency?
Higher inlet negative pressure reduces inlet air density; the unit must increase power to maintain pressure and flow, raising specific power. For continuous-duty Centac units, this energy cost typically far exceeds the element cost.

Can I clean and reuse it?
No. This is a dry disposable element and is not designed for cleaning. Back-blowing with compressed air damages the media structure and creates invisible paths that let unfiltered air through — 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 units, also check water-side scaling. Always check that the differential pressure gauge impulse lines are clear.

Can this element be interchanged with a screw compressor air filter?
No. At approx. 5.4 kg net, it is two to three times the weight of a screw compressor element; dimensions, filtration area and resistance characteristics are designed for the high inlet flow of centrifugal machines.

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 the part numbers differ. Read the number on the old element body before ordering.

How do I confirm dimensions?
Measure the old element (outside diameter, inside diameter, height) or request the Ingersoll Rand specification drawing. Do not cross-reference by weight or appearance alone.

Do you have stock and 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 can I be 100% sure of the part number?
Three steps: check the unit nameplate to confirm Centac series; provide the serial number for cross-check against the centrifugal parts catalog; read the part number on the old element body. The third step is the 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 configurations
2	Centac C Series	Common models include C400, C700, C700e, C1000, C2000, C3000 and others

Centac background: Centac is Ingersoll Rand's centrifugal compressed air brand, using multi-shaft internal gear transmission and multi-stage compression. Output covers approximately 720–51,000 m³/h (model-dependent), pressure range approximately 0.7–22.5 bar. Units are 100% oil-free and commonly hold ISO 8573-1 Class 0 certification, serving electronics, pharmaceutical, petrochemical and textile industries where air quality is critical.

Reading notes: The table above is a compatibility range; individual fit must be confirmed by unit nameplate and serial number. Large Centac units often use multiple elements per inlet system; confirm the quantity before ordering. If unsure which series, provide a nameplate photo for cross-reference.

Related Components

Seven components in the Centac inlet and lubrication systems are commonly maintained on the same cycle as the air filter. Refer to the Centac parts manual for specific part numbers.

Component	Location	Function	Inspection Points
Intake Air Filter Core	Inlet filter housing	Similar name, different part number (67765362 in local manual)	Verify body number; do not confuse with 67754101
Differential Pressure Gauge	On inlet filter housing	Indicates element dust loading; authoritative for change timing	Check needle returns; 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 piping	Reduces intake noise; some models also straighten airflow	Check for corrosion perforation and loose silencing material
Intercooler Tube Bundles	Between compression stages	Reduces interstage temperature; key to centrifugal efficiency	Check air-side fouling; water-cooled units 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-increasing box	Lubricates gears and high-speed bearings (isolated from compression chamber)	Test oil per unit requirements; monitor oil level and temperature

Recommended companion checks: Centrifugal compressor maintenance value centers on efficiency retention. Each time you replace the inlet element, also inspect the differential pressure gauge, guide vane mechanism and intercooler condition to make full use of the shutdown window. Schedule cooler cleaning and impeller inspection in annual planned maintenance rather than waiting for obvious efficiency loss.