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 is mounted inside the inlet filter housing, upstream of the inlet guide vanes and the first-stage impeller. Because the impeller accelerates air at high speed before the diffuser converts velocity into pressure, the incoming air must be clean: this element is the particle barrier protecting the impeller blades and intercooler passages.

This element is notably larger and heavier than a typical screw compressor filter: approximately 5.4 kg (11.94 lbs) net, two to three times the weight of a rotary screw inlet filter (usually 1–3 kg). That reflects the high intake volume of Centac machines, which can draw tens to hundreds of cubic metres per minute; a larger filtration area keeps face velocity and pressure drop low.

Centrifugal compressors depend on inlet filtration more heavily than screw machines. Centac units are 100% oil-free, so there is no lubricating oil 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 temperature and lowers overall efficiency. Centac machines often run continuously as mainline equipment, where a single unplanned stop typically costs far more than the element itself.

Core Specifications

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

Technical Parameters

1. Filtration Performance

Parameter	Value / Notes
Filtration rating	5–10 μm
Filtration efficiency	≥98% for particles ≥5 μm
Filter class	HVAC classification (EN 779) does not apply; centrifugal inlet elements are characterised under ISO 5011 by efficiency, restriction and dust-holding capacity

Centac impellers rotate at tens of thousands of rpm and have narrow blade passages, so particles strike the impeller at far higher relative velocity than in a screw rotor. Erosion from a given particle size is more severe, and once intercooler tubes foul, cleaning requires shutdown and disassembly — unplanned overhaul work.

2. Flow and Pressure Drop

Parameter	Value / Notes
Rated air flow	—
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	Judged 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 a centrifugal machine's output depends on inlet air density, dust loading raises inlet vacuum and reduces both the pressure and density of air reaching the first-stage impeller. To hold set discharge pressure and flow, the machine must run faster or draw more power, and specific power rises. On a large continuously running Centac, that energy penalty over a year usually exceeds the cost of a filter set — which is why Ingersoll Rand fits inlet differential pressure indication.

3. Construction and Installation

Parameter	Value / Notes
Type	Cylindrical inlet element, installed in the filter housing
Net weight (each)	Approx. 5.4 kg (11.94 lbs)
Mounting	Fits the Centac inlet filter housing; face-seal compression
Sealing	Face seal, axially compressed

For reference: at approx. 5.4 kg this element is two to three times the weight of a standard screw compressor inlet filter (1–3 kg) and is a large centrifugal-duty element. Do not cross-reference other part numbers by weight or appearance alone.

4. Materials

Parameter	Value / Notes
Media	Imported wood-pulp filter paper (industry-common HV or Ahlstrom media)
Media weight	Approx. 130 g/m²
Inner / outer support	Galvanised steel perforated cage (inner cage + outer guard)
End caps	Metal end caps (galvanised steel) with polyurethane bonding
Seal	NBR (nitrile) seal ring
Bonding	Polyurethane (PU) hot-melt adhesive

5. Operating Tolerance

Parameter	Value / Notes
Operating temperature	−10 to +100 °C
Relative humidity	≤80% RH, no condensation
Burst strength	Media burst strength approx. 200–400 kPa (per ISO 2758 paper burst test)
Collapse resistance	Element must withstand the machine inlet alarm differential without collapsing
Special features	No flame-retardant, anti-static or special coating designation listed for this model

6. Service Life and Maintenance

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

Besides the 2,000-hour reference, an "every 8,000 hours or annually" recommendation also circulates, mostly for rotary screw applications. On a Centac centrifugal machine, the inlet differential pressure gauge reading is the most reliable criterion, since ambient dust loading can change actual life by multiples.

7. Applicable Standards

Item	Details
Primary product standard	ISO 5011 (inlet air filters for internal combustion engines and compressors — performance testing), evaluating efficiency, 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 referenced 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 cite hydraulic filter standards, request ISO 5011 data or the OEM specification sheet.
Oil-free certification context	The Centac machines served by this element are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first safeguard maintaining that class

Installation and Maintenance Procedure

Centrifugal work differs from screw compressor work: the impeller has high rotational inertia, so the controller must confirm zero speed. Allow about 40–60 minutes per job; depending on housing size, two people or mechanical assistance may be needed (this element weighs 5.4 kg net and requires safe handling and lifting).

1. Shut down, confirm zero speed, lock out/tag out. Stop the machine and wait for the controller's zero-speed confirmation — do not judge by sound. Isolate the main power and apply lockout/tagout. Criterion: controller shows zero speed and no coasting sound.
2. Open the inlet filter housing. The housing sits upstream of the inlet guide vanes. Loosen cover latches or fasteners evenly in a diagonal sequence. Criterion: on large housings, support the cover before releasing the last fastener to prevent it dropping.
3. Remove the old element and inspect the housing for dust tracks. Pull out the old element, supporting its weight so the media is not crushed. Look specifically for dust tracks on the housing wall — tracks indicate seal bypass, meaning unfiltered air has passed the seal. Criterion: no dust tracks on the inner wall means the seal was sound.
4. Clean the housing and sealing face. Wipe the inner wall, base and sealing face with a dry, lint-free cloth. Do not blast compressed air into the housing — this drives dust into the intake path. Criterion: no loose dust inside, sealing face flat with no pits or corrosion.
5. Verify the new element. Compare item by item with the old part: part number, dimensions, seal integrity, undamaged media. Criterion: part number and dimensions must match before installation; confirm this element's dimensions by measurement (see Section 3).
6. Fit the new element and confirm seating. Place the 67754101 into the housing and confirm it is fully seated at the base, the sealing face is in contact with no trapped material, and the element is centred without skew. Criterion: even compression marks around the sealing face.
7. Refit the cover and check the differential pressure gauge impulse line. Refit the cover and tighten evenly in a diagonal sequence. Before start-up, confirm the inlet differential pressure impulse line is clear, not blocked and not frozen. Criterion: line clear; a blocked impulse line gives a falsely clean reading and lets the element run past its life.
8. Start per the centrifugal start-up procedure and verify. Start according to the machine procedure. Once running steadily, read the inlet differential pressure — it should return to the clean-element baseline range — and listen for housing air leaks. Criterion: normal differential reading, no abnormal noise; record date, running hours and differential reading.

A centrifugal-specific rule: the consequences of seal bypass are amplified on a centrifugal machine. A screw compressor still has oil to carry away some particles; a centrifugal compression path is oil-free, so particles all deposit on the impeller and coolers. One seal failure can cost one impeller dynamic balancing job.

Frequently Asked Questions

Which machines use 67754101?
Ingersoll Rand Centac centrifugal air compressors — Centac, Centac C series and CN series. The Centac range is broad, 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, reflecting actual dust loading), or use the 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 past it.

How much does a loaded element affect centrifugal efficiency?
Rising inlet vacuum lowers inlet density, so the machine must draw more power to hold pressure and flow, raising specific power. A Centac is a large, continuously running machine, and that energy penalty over a year usually far exceeds the element cost.

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

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

Can this element be interchanged with a screw compressor inlet filter?
No. At approx. 5.4 kg net it is two to three times the weight of a screw compressor element, and its dimensions, filtration area and restriction characteristics are designed for the high intake volume of a centrifugal machine. The two are not interchangeable.

Are 67754101 and 67765362 the same part?
No. Both descriptions contain "inlet air filter" (67754101 = Element, Inlet Air Filter; 67765362 = Intake Air Filter Core), but the part numbers differ. Before ordering, read the number on the old part itself — do not judge by description.

How should dimensions be confirmed?
Confirm outside diameter, inside diameter and height by measuring the old part, or request a specification drawing from Ingersoll Rand. Do not cross-reference other part numbers by weight or appearance.

Is it in 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 against stock and sailing schedule at the time of enquiry.

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 so we can cross-check against the centrifugal parts catalogue; (3) read the part number on the old element itself. Step three is the most reliable.

Machine Fitment

This part number fits Ingersoll Rand Centac centrifugal air compressors. The fitment range is as follows:

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

Background on the Centac range

Centac is Ingersoll Rand's centrifugal compressed air machine brand, using multi-pinion internal gearing and multi-stage compression. Output flow covers roughly 720–51,000 m³/h depending on model, at pressures of roughly 0.7–22.5 bar. The machines are 100% oil-free and generally certified to ISO 8573-1 Class 0, and are widely used in electronics, pharmaceutical, petrochemical and textile applications where air quality is critical.

How to read the table

• The table shows the fitment range; individual fitment must be confirmed by machine nameplate and serial number.
• Large Centac machines usually use multiple elements in the inlet system; the quantity per machine depends on the model. Confirm the element count before ordering.
• If you are unsure which series the machine belongs to, provide a nameplate photo and we will cross-check by serial number.

Related Components

Seven components in the Centac inlet and lubrication systems are maintained on a similar cycle to the inlet filter. They are listed below by location, function and inspection point; for specific part numbers, refer to the machine's Centac parts manual.

Component	Location	Function	Inspection point
Intake air filter core	Inlet filter housing	A similarly named but different part number (67765362 appears in the local manual)	Check the number on the part itself when ordering; do not confuse with 67754101
Differential pressure gauge	On the inlet filter housing	Indicates element dust loading; the authoritative basis for change timing	Check the needle returns correctly; impulse line must be clear and not frozen
Inlet guide vane assembly	Downstream of the filter, upstream of the first-stage impeller	Regulates inlet flow and angle for capacity control	Check the linkage for binding or looseness; vane fouling affects control accuracy
Intake silencer	In the intake duct	Reduces intake 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; a key factor in centrifugal efficiency	Check air-side fouling; on water-cooled machines also check water-side scaling
Aftercooler	After the final stage	Cools discharge air to the 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 the compression path)	Test oil per machine requirements; monitor oil level and temperature

Related replacement advice: maintenance value on a centrifugal machine centres on efficiency retention. Each time the inlet element is changed, inspect the differential pressure gauge, guide vane linkage and intercooler condition in the same window. Cooler cleaning and impeller inspection should be planned annually rather than postponed until efficiency visibly drops.