Ingersoll Rand 67754101 Centac Inlet Air Filter Element | 5.4 kg

Product Overview

67754101 is the inlet air filter element (Element, Inlet Air Filter) for Ingersoll Rand Centac centrifugal air compressors.

It mounts inside the inlet filter housing, upstream of the inlet guide vanes and the first-stage impeller. Because Centac machines accelerate air through high-speed impellers before diffusing it into pressure, the air must be clean before it reaches stage one — this element is the particle barrier protecting the impeller blades and intercooler passages.

The element is notably larger and heavier than a typical rotary screw air filter: approximately 5.4 kg (11.94 lbs) net, two to three times the weight of screw compressor elements (usually 1–3 kg). This reflects the high inlet volumes of centrifugal machines, where a larger filtration area keeps face velocity and pressure drop low.

Centrifugal compressors are 100% oil-free; there is no lubricant circuit to carry contaminants away. Dust that enters the compression path deposits on the impeller, diffuser, and intercooler. Impeller fouling alters dynamic balance and aerodynamic efficiency, while intercooler tube fouling raises interstage temperatures and erodes overall efficiency. Centac units often run continuously as primary plant equipment, so unplanned downtime typically costs far more than the element itself.

Key Specifications

Item	Value
Part number	67754101
Description	Element, Inlet Air Filter
Brand	Ingersoll Rand
Machine compatibility	Centac, Centac C series, CN series centrifugal compressors
Manual reference	1X9428
Design	Dry disposable inlet element
Net weight (per element)	Approx. 5.4 kg (11.94 lbs)
Filtration rating	5–10 μm
Filtration efficiency	≥98%
Suggested replacement interval	Approx. 2,000 hours, or per inlet differential pressure gauge

Technical Data

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 filter grades; centrifugal inlet elements are characterised by efficiency, inlet restriction, and dust holding capacity per ISO 5011

Centac impellers rotate at tens of thousands of rpm and blade passages are narrow, so particle impact speeds are far higher than in a screw rotor. Intercooler tube fouling, once established, requires shutdown and disassembly to clean.

Flow and pressure drop

Parameter	Value / note
Rated air flow	—
Filtration face velocity	—
Initial pressure drop	Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O)
Operating differential range	From new-element initial restriction to alarm restriction
Alarm / final restriction	Determined by the machine inlet differential pressure gauge
Pressure drop vs. energy	Rising inlet restriction reduces inlet air density, so the machine needs more power to hold pressure and flow, raising specific power

Because Centac is a centrifugal machine, its capacity depends on inlet air density. As the element loads and inlet vacuum rises, the pressure and density of air entering stage one fall; the unit must increase speed or power to maintain set discharge pressure and flow, and specific power rises. On large continuous-duty machines this energy penalty usually exceeds the cost of a replacement element over a year — which is why Ingersoll Rand fits an inlet differential pressure indicator.

Construction and installation

Parameter	Value / note
Design	Cylindrical element, installed in the filter housing
Net weight (per element)	Approx. 5.4 kg (11.94 lbs)
Mounting interface	Fits the Centac inlet filter housing with axial face seal
Sealing	Axial face seal under compression

For reference, at approx. 5.4 kg this element is two to three times the weight of a standard screw compressor air filter (1–3 kg). Do not cross-reference other part numbers by weight alone.

Materials

Parameter	Value / note
Filter media	Imported wood-pulp filter paper (industry-common HV or Ahlstrom grades)
Media basis weight	Approx. 130 g/m²
Inner / outer support	Galvanised perforated steel cage (inner cage plus outer guard)
End caps	Metal end caps (galvanised steel) with polyurethane bonding
Seal	NBR (nitrile) gasket
Adhesive	Polyurethane (PU) hot-melt

Operating tolerance

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 without collapsing
Special features	No flame-retardant, anti-static, or special coating claims are stated for this model

Service life and maintenance

Parameter	Value / note
Service life	Approx. 2,000 hours
Actual replacement interval	Per the machine inlet differential pressure gauge; shorten in coastal (salt-laden), desert (fine dust), or industrial (process dust) environments
Storage shelf life	Approx. 2–3 years, unopened, dry and ventilated conditions

Some references suggest 8,000 hours or annual replacement, typically for rotary screw applications. For Centac centrifugal machines, the inlet differential pressure gauge reading is the most reliable guide, since dust loading can change actual intervals by a factor of several.

Applicable standards

Item	Detail
Product standard	ISO 5011 (inlet air filters for internal combustion engines and compressors — performance testing), covering efficiency, inlet restriction, and dust holding capacity
Other commonly cited standards	ANSI/CAGI ADF 400-1999 (compressed air and gas), ISO 8573-4 (compressed air — particle measurement)
Commonly quoted test standards	ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968
Note on standard applicability	The ISO 29xx / 37xx series are general test methods for hydraulic filter elements. If a supplier can only cite hydraulic filter standards, request ISO 5011 data or the OEM specification sheet.
Oil-free context	The Centac machines this element serves are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first safeguard maintaining that class

Installation and Maintenance Steps

Centrifugal machine work differs from screw compressor work: the impeller has significant inertia, so zero-speed confirmation from the controller is mandatory. Allow 40–60 minutes per job; two people or mechanical assistance may be needed given the 5.4 kg element weight.

1. Stop the machine, confirm zero speed, lock out/tag out. Wait for controller zero-speed confirmation — do not judge by sound. Isolate main power and apply lockout/tagout. Criterion: controller shows zero speed and no coasting noise.
2. Open the inlet filter housing. The housing sits upstream of the inlet guide vanes. Loosen cover clamps or fasteners evenly in a diagonal sequence. Criterion: support large covers before releasing the final fastener to prevent sudden drop.
3. Remove the old element and inspect for dust traces. Pull the element out, supporting its weight so the media is not crushed. Look for dust tracks on the housing interior — these indicate seal bypass. Criterion: no dust tracks on the inner wall means the seal was sound.
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 interior, which drives dust into the inlet path. Criterion: no loose dust inside; sealing face flat with no pitting or corrosion.
5. Verify the new element. Compare against the old part item by item: part number, dimensions, seal integrity, undamaged media. Criterion: part number and dimensions must match before installation; confirm dimensions by measurement (see Technical Data).
6. Fit the new element and confirm seating. Place the 67754101 into the housing and confirm full seating at the base, seal contact without trapped material, and centred alignment. Criterion: even compression marks around the seal face.
7. Refit the cover and check the gauge impulse line. Reinstall the cover and tighten evenly in a diagonal sequence. Before start-up, confirm the inlet differential pressure gauge impulse line is clear, unblocked, and not frozen. Criterion: clear line; a blocked line gives a falsely clean reading and lets the element run past its service limit.
8. Start per the centrifugal machine procedure and verify. Start according to the unit's procedure. Once stable, read inlet differential pressure, which should return to the clean-element baseline; listen for housing leaks. Criterion: normal differential reading and no abnormal noise; record date, running hours, and differential reading.

Centrifugal-specific rule: seal bypass is more damaging on a centrifugal machine. A screw compressor still has oil to carry some particles away; a centrifugal compression path is oil-free, so particles deposit entirely on the impeller and coolers. A single seal failure can cost an impeller dynamic balance correction.

FAQ

Which machines use 67754101?
Ingersoll Rand Centac centrifugal air compressors — Centac, Centac C series, and CN series. The Centac family spans many models, so exact fitment requires the machine nameplate and serial number.

How do I know when to replace it?
Two routes: read the machine inlet differential pressure gauge (most reliable, reflects actual dust loading), or use the approx. 2,000-hour interval as a reference. The gauge reading takes priority — dust loading varies widely by site, so a fixed interval either wastes element life or runs it too long.

How much does element loading affect centrifugal efficiency?
Rising inlet vacuum lowers inlet air density, so the machine needs more power to hold pressure and flow, raising specific power. On continuous-duty Centac machines this annual energy penalty usually exceeds the element cost.

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

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

Can this element be swapped with a screw compressor air filter?
No. At approx. 5.4 kg, it is two to three times the weight of a screw compressor element; dimensions, filtration area, and restriction characteristics are designed for the high inlet flows 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 the part numbers differ. Read the number stamped on the old element itself before ordering; do not judge by 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.

Do you hold stock, and what are the lead times?
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 quotation based on current stock and sailing schedules.

How do I confirm the part number 100%?
Three steps: check the machine nameplate to confirm the Centac series; provide the serial number so we can cross-check the centrifugal parts catalogue; and read the part number on the old element. The third step is the most reliable.

Compatible Machine Models

This part number fits Ingersoll Rand Centac centrifugal air compressors:

No.	Compatible models	Note
1	Centac	Main centrifugal series, including multi-stage, multi-pinion geared designs
2	Centac C series	Common models include C400, C700, C700e, C1000, C2000, C3000

Centac background: Centac is Ingersoll Rand's centrifugal compressed air machine brand, using multi-pinion internal gearing and multi-stage compression. Output covers roughly 720–51,000 m³/h depending on model, with pressures around 0.7–22.5 bar. Units are 100% oil-free and commonly hold ISO 8573-1 Class 0 oil-free certification, serving electronics, pharmaceutical, petrochemical, and textile industries where air quality is critical.

Reading the table:

• The table shows compatibility range; individual fitment must be confirmed by machine nameplate and serial number.
• Large Centac units typically use multiple elements in the inlet system; the number per machine varies by model. Confirm the element count 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 systems are commonly serviced on the same cycle as the air filter. The list below covers 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	A similarly named but different part number (67765362 in local manuals)	Verify the number on the part itself; do not confuse with 67754101
Differential pressure gauge	On the inlet filter housing	Indicates element loading; the authoritative guide for replacement timing	Check needle returns correctly; impulse line must be clear and not frozen
Inlet guide vane assembly	Downstream of filter, upstream of first-stage impeller	Regulates inlet volume and angle for capacity control	Check linkage for binding or looseness; vane fouling affects control accuracy
Intake silencer	Inlet air path	Reduces inlet noise; some models also straighten airflow	Check for corrosion perforation and loose silencing material
Intercooler tube bundles	Between compression stages	Reduces interstage air temperature; key to centrifugal efficiency	Check air-side fouling; on water-cooled machines check water-side scaling
Aftercooler	After final stage discharge	Cools discharge air to set temperature	Blocked tubes directly raise discharge temperature
Gearbox and bearing lubrication components	Gear speed-increasing box	Lubricates gears and high-speed bearings (isolated from compression path)	Test oil per machine requirements; monitor oil level and temperature

Companion replacement advice: Centrifugal maintenance value centres 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. Schedule cooler cleaning and impeller inspection as annual planned maintenance rather than waiting for a visible efficiency drop.