Ingersoll Rand 67754101 Centac Inlet Air Filter Element | 5.4 kg OEM Part

Product Overview

67754101 is the inlet air filter element (Element, Inlet Air Filter) for Ingersoll Rand Centac centrifugal air compressors. It is installed 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 in the diffuser. Air must be clean before it reaches the first-stage impeller — the inlet filter element is the particle barrier protecting the impeller blades and intercooler passages.

This element is notably larger and heavier than standard screw-compressor filter elements: approximately 5.4 kg (11.94 lbs) net per piece, roughly two to three times the weight of a typical screw-compressor inlet element (usually 1–3 kg). This reflects the high inlet volumes of Centac machines, where filter area must be large enough to keep face velocity and pressure drop low.

Centrifugal compressors are 100% oil-free. With no lubricating oil circulating through the compression chamber to carry contaminants away, dust that enters deposits directly on the impeller, diffuser and intercooler. Fouling on the impeller affects dynamic balance and aerodynamic efficiency; fouling on intercooler tubes raises interstage temperature and reduces overall efficiency. Centac units are typically continuous-duty assets, so the cost of an unplanned stop usually far exceeds the cost of the filter element itself.

Key Specifications

Item	Value
Part number	67754101
Product name	Element, Inlet Air Filter
Brand	Ingersoll Rand
Compatible machines	Centac, Centac C series, CN series centrifugal compressors
Manual reference	1X9428
Type	Dry disposable inlet element
Net weight per piece	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 the machine 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	Centrifugal inlet elements are characterised per ISO 5011 by efficiency, inlet restriction and dust holding capacity; the EN 779 HVAC classification does not apply

Flow, pressure drop and energy

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	Rising inlet restriction lowers inlet air density; the machine must increase power to hold pressure and flow, raising specific power

Because Centac is a centrifugal machine, its delivery capacity depends on inlet air density. As dust loading increases inlet vacuum, the pressure and density of air entering the first-stage impeller fall, and the unit must run harder to maintain discharge pressure and flow. On continuous-duty machines, the resulting energy loss over a year typically far exceeds the cost of a filter set — which is why Ingersoll Rand fits an inlet differential pressure indicator.

Construction and materials

Parameter	Value / Note
Construction	Cylindrical element, installed into the filter housing
Media	Imported wood-pulp filter paper (commonly US HV or Ahlstrom grades)
Media weight	Approx. 130 g/m²
Support	Galvanised perforated steel inner core and outer guard
End caps	Metal end caps (galvanised steel) with polyurethane bonding
Seal	NBR (nitrile) gasket, face seal under axial compression

Operating limits and service life

Parameter	Value / Note
Operating temperature	−10 to +100 °C
Relative humidity	≤80% RH, no condensation
Burst strength	Media burst approx. 200–400 kPa (per ISO 2758)
Collapse resistance	Element must withstand the machine inlet alarm differential without collapsing
Service life	Approx. 2,000 hours; actual interval per the inlet differential pressure gauge
Storage life	Approx. 2–3 years unopened, dry and ventilated conditions

Note on change intervals: coastal (salt-laden), desert (fine dust) and industrial (process dust) environments can shorten or lengthen the interval considerably. The machine inlet differential pressure gauge is the most reliable reference.

Applicable standards

Item	Content
Product standard	ISO 5011 — inlet air cleaners for engines and compressors: efficiency, inlet restriction and dust holding capacity
Other referenced standards	ANSI/CAGI ADF 400-1999; ISO 8573-4 (compressed air — solid particle measurement)
Oil-free background	Centac units served by this element are ISO 8573-1 Class 0 oil-free machines; inlet filtration is the first line of defence for that oil-free rating
Standard applicability note	The ISO 29xx / 37xx series are general test methods for hydraulic filter elements. Where a supplier can only cite hydraulic element standards, request ISO 5011 data or the OEM specification sheet

Installation Steps

Centrifugal machines differ from screw compressors: the impeller has high rotational inertia, so the controller must confirm zero speed before work begins. Allow roughly 40–60 minutes. The element weighs approx. 5.4 kg, so use safe lifting and support measures.

1. Stop the machine, confirm zero speed, lock out/tag out. Wait for the controller to confirm zero speed — do not judge by sound alone. Isolate main power and apply lockout/tagout.
2. Open the inlet filter housing. The housing sits upstream of the inlet guide vanes. Loosen cover fasteners evenly in a diagonal sequence; support the cover before releasing the final fastener.
3. Remove the old element and inspect for dust tracks. Support the element firmly to avoid crushing the media. Look for dust trails on the housing wall — these indicate seal bypass, meaning unfiltered air has bypassed the seal.
4. Clean the housing and sealing face. Wipe the interior, base and sealing face with a dry lint-free cloth. Do not blow compressed air into the housing, which drives dust into the intake path.
5. Verify the new element. Compare part number, dimensions, seal integrity and media condition against the old element. Install only when the part number and dimensions match; confirm dimensions by measuring the old element where necessary.
6. Fit the new element and confirm seating. Place the 67754101 into the housing, confirm full seating at the base, an even seal contact with no trapped material, and a centred, non-skewed position.
7. Refit the cover and check the gauge impulse line. Tighten diagonally in stages. Before start-up, confirm the inlet differential pressure impulse line is clear, unblocked and not frozen — a blocked line gives a falsely clean reading and can lead to over-extended element use.
8. Start per the centrifugal start-up procedure and verify. After stable operation, read the inlet differential pressure and confirm it returns to the clean-element baseline. Listen for leakage at the housing. Record date, running hours and differential pressure reading.

Centrifugal-specific rule: the consequences of seal bypass are amplified on oil-free machines. With no oil to carry particles away, deposits land on the impeller and coolers — a single seal failure can mean an impeller dynamic balance correction.

FAQ

Which machines use 67754101?
Ingersoll Rand Centac centrifugal compressors — Centac, Centac C series and CN series. Because the Centac range is broad, exact fitment should be confirmed against the machine nameplate and serial number.

How do I decide when to replace it?
Two references: the machine inlet differential pressure gauge (most reliable, reflects actual dust loading) and the approx. 2,000-hour reference interval. The gauge takes priority, since dust loading varies widely by site.

How much does dust loading affect centrifugal efficiency?
Rising inlet vacuum lowers inlet air density, so the machine must increase power to hold pressure and flow, raising specific power. On continuous-duty Centac units, that energy cost over a year 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 channels that let unfiltered air pass — more hazardous than not replacing it.

What else should be checked during replacement?
The inlet guide vane linkage, intake silencer, intercooler tube bundles and housing sealing faces. On water-cooled machines, also check the cooler water side for scaling, which directly affects interstage temperature. Always check that the differential pressure impulse line is clear.

Can this element be interchanged with a screw-compressor element?
No. At approx. 5.4 kg it is two to three times the weight of a screw-compressor inlet element, and its dimensions, filtration area and restriction characteristics are designed for the high inlet volumes 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 part itself before ordering.

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

Is it in stock and what is the lead time?
Regular stock items ship within 24 hours. Indicative transit: 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 against stock and sailing schedules at the time of enquiry.

How do I confirm the part number with certainty?
Three steps: check the machine nameplate to confirm it is a Centac series; provide the serial number so we can cross-check the centrifugal parts catalogue; and read the part number on the old element itself. The third step is the most reliable.

Compatible Machine Models

No.	Compatible machine	Note
1	Centac	Main centrifugal series with multi-stage, multi-shaft geared construction
2	Centac C series	Common models include C400, C700, C700e, C1000, C2000, C3000
3	CN series	Centrifugal range covered by the same element family

Background on the Centac range: Centac is Ingersoll Rand's centrifugal compressed-air machine brand, using multi-shaft internal gearing and multi-stage compression. Output covers roughly 720–51,000 m³/h depending on model, with pressures of roughly 0.7–22.5 bar. The units are 100% oil-free and commonly hold ISO 8573-1 Class 0 certification, serving electronics, pharmaceutical, petrochemical and textile applications where air purity matters.

• The table above is a compatibility range; individual fitment must be confirmed by nameplate and serial number.
• Large Centac machines often use multiple elements in the inlet system. Confirm the element count for your machine before ordering.
• If you are unsure which series your machine belongs to, send a nameplate photo and we will cross-check by serial number.

Related Components

Seven components in the Centac inlet and lubrication system are typically serviced on the same cycle. Refer to the Centac parts manual for specific part numbers.

Component	Location	Function	Check points
Intake air filter core	Inlet filter housing	Separate part number with a similar name (67765362 in the local manual)	Verify the number on the part; do not confuse with 67754101
Differential pressure gauge	Inlet filter housing	Indicates element dust loading; the authoritative replacement reference	Check needle return; 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 binding or looseness; fouling affects control accuracy
Intake silencer	Inlet ducting	Reduces inlet noise; on some models also straightens airflow	Check for corrosion perforation and loose acoustic material
Intercooler tube bundles	Between compression stages	Lowers interstage air temperature; key to centrifugal efficiency	Check air-side fouling; on water-cooled units also check water-side scaling
Aftercooler	After final stage discharge	Cools discharge air to the set temperature	Blocked tubes raise discharge temperature directly
Gearbox and bearing lubrication components	Gear speed-increasing box	Lubricates gears and high-speed bearings (isolated from the compression chamber)	Test oil per machine requirements; monitor oil level and temperature

Recommended companion work: centrifugal maintenance value centres on efficiency retention. When replacing the inlet element, also inspect the differential pressure gauge, guide vane linkage and intercooler condition to make full use of the shutdown window. Cooler cleaning and impeller inspection belong in the annual planned maintenance schedule rather than being deferred until efficiency visibly drops.