Ingersoll Rand 67754101 Centac Inlet Air Filter Element | OEM Centrifugal Compressor Part

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 first-stage impeller, and acts as the particle barrier protecting the impeller blades and intercooler passages.

Because Centac machines are 100% oil-free, there is no lubricant circuit to carry contaminants away from the compression path. Dust that enters the machine deposits on the impeller, diffuser, and intercooler tube bundles. Impeller fouling alters dynamic balance and aerodynamic efficiency; intercooler fouling raises interstage temperatures and reduces overall efficiency. For continuous-duty Centac units, the cost of one unplanned shutdown typically far exceeds the cost of the filter element itself.

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

Core 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 inlet element
Net Weight	Approx. 5.4 kg (11.94 lbs)
Filtration Rating	5–10 μm
Filtration Efficiency	≥98%
Recommended Replacement	Approx. 2,000 hours, or per inlet differential pressure gauge

Technical Specifications

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 filters 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, so particle impact velocities are far higher than in screw rotors. Intercooler tube bundles, once fouled, require shutdown and disassembly to clean — 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	Determined by the machine inlet differential pressure gauge
Pressure Drop vs. Energy	Higher inlet resistance reduces inlet air density; the machine increases power to maintain pressure and flow, raising specific power

Centac output depends on inlet air density. As the filter loads, inlet vacuum rises, reducing pressure and density at the first-stage impeller. To hold discharge pressure and flow, the machine must increase speed or power. On large continuous-duty centrifugal units, this energy penalty over a year usually exceeds the cost of a filter set — which is why Ingersoll Rand fits an inlet differential pressure indicator.

Construction and Installation

Parameter	Value / Notes
Construction	Cylindrical inlet element, installed in filter housing
Net Weight	Approx. 5.4 kg (11.94 lbs)
Mounting	Fits Centac inlet filter housing; axial face seal
Sealing	Face seal (axial compression)

Materials

Parameter	Value / Notes
Filter Media	Imported wood pulp filter paper (industry-common US 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) with polyurethane adhesive
Seal	Nitrile rubber (NBR) gasket
Bonding	Polyurethane (PU) hot-melt adhesive

Operating Conditions

Parameter	Value / Notes
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 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 Replacement Interval	Per machine 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 (compressed air and gas), ISO 8573-4 (compressed air — solid particle measurement)
Common Industry Test Standards	ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968
Note on Applicability	The ISO 29xx / 37xx series are generic test methods for hydraulic fluid power filter elements. If a supplier only provides hydraulic filter standards, request ISO 5011 or original specification data.
Oil-Free 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 Steps

Centrifugal machine work differs from screw compressor work: the impeller has high rotational inertia, and the controller must confirm zero speed. Allow 40–60 minutes per job; with the 5.4 kg element, use safe lifting and handling measures and plan for two-person or mechanical assistance depending on housing size.

1. Shut down, confirm zero speed, lock out/tag out. Stop the machine and wait for the controller zero-speed confirmation (do not judge by sound). Isolate main power and apply lockout/tagout. Criterion: controller shows zero speed, no coasting sound.
2. Open the inlet filter housing. The housing is 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 for dust tracks. Pull out the old element; it is heavy, so support it to avoid media deformation. Look for dust tracks on the housing interior — these indicate seal bypass. Criterion: no dust tracks means the seal was effective.
4. Clean the housing and sealing surfaces. Wipe the interior, base, and sealing surfaces with a dry lint-free cloth. Do not blow compressed air into the housing (it drives dust into the inlet). Criterion: no loose dust, sealing surface flat with no pitting or corrosion.
5. Verify the new element. Compare against the old part: part number, dimensions, seal integrity, and media condition. Criterion: part number and dimensions must match before installation; confirm dimensions by measurement (see Technical Specifications).
6. Install the new element and confirm seating. Place 67754101 into the housing; confirm full seating at the base, seal contact without trapped material, and centered alignment. Criterion: even compression marks around the seal face.
7. Refit the cover and check the differential pressure lines. Refit the cover and tighten evenly in a diagonal sequence. Before startup, confirm the inlet differential pressure gauge lines are clear, unobstructed, and not frozen. Criterion: clear lines; a blocked line gives a false clean reading and allows over-extended filter use.
8. Start per the centrifugal machine procedure and verify. Start per the machine procedure. After stable operation, read the inlet differential pressure — it should return to the clean-element baseline. Listen for air leaks at the housing. Criterion: normal differential pressure, no abnormal noise; record date, running hours, and differential pressure.

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. One seal failure can mean one 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 nameplate and serial number verification.

How do I know when to replace it? Two methods: read the machine 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 — dust loading varies widely by site, so fixed intervals either waste filter life or risk over-extended operation.

How much does filter loading affect centrifugal efficiency? Rising inlet vacuum reduces inlet air density; the machine increases power to maintain pressure and flow, raising specific power. On continuous-duty Centac units, this energy cost over a year typically far exceeds the filter cost.

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

What else should I check when replacing the filter? 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 lines for blockage.

Can this filter be interchanged with a screw compressor inlet filter? No. At approximately 5.4 kg net, it is two to three times the weight of a screw compressor inlet filter. Dimensions, filtration area, and resistance characteristics are designed for high-flow 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 on the old part before ordering; do not judge by name.

How do I confirm dimensions? Measure the old part (outer diameter, inner diameter, height) or request a specification drawing from Ingersoll Rand. Do not substitute other part numbers based on 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 stock and shipping schedule at time of inquiry.

How can I be 100% sure of the part number? Three steps: ① check the machine nameplate to confirm the Centac series; ② provide the serial number for cross-checking against the centrifugal parts catalog; ③ read the part number on the old filter element. Step ③ is the most reliable.

Compatible Machine Models

This part number fits Ingersoll Rand Centac centrifugal air compressors. Compatibility:

No.	Compatible Model	Notes
1	Centac	Main centrifugal series, multi-stage multi-pinion gear drive
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 gear drive and multi-stage compression. Output covers approximately 720–51,000 m³/h (model dependent) with pressure ranges around 0.7–22.5 bar. Machines are 100% oil-free, commonly certified to ISO 8573-1 Class 0, and are used in electronics, pharmaceutical, petrochemical, and textile industries where air quality is critical.

Reading notes:

• The table above is a compatibility range; individual fitment must be confirmed by machine nameplate and serial number.
• Large Centac machines often use multiple inlet filter elements; the number per machine varies by model. Confirm the filter configuration before ordering.
• If unsure of the series, 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 the same cycle as the inlet filter. Listed by location, function, and inspection points; for specific part numbers, refer to the Centac parts manual.

Component	Location	Function	Inspection Points
Intake Air Filter Core	Inlet filter housing	Similar name to this part (67765362 in local manual)	Verify body number when ordering; do not confuse with 67754101
Differential Pressure Gauge	On inlet filter housing	Indicates filter loading; authoritative replacement indicator	Check needle returns properly; 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 intake noise; some models also act as flow straightener	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; on water-cooled models 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 increaser	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. At each inlet filter change, 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 the annual maintenance plan rather than waiting for a noticeable efficiency drop.