Ingersoll Rand Centac Inlet Air Filter Element 67754101

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, forming the particle barrier that protects the impeller blades and intercooler passages.

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 screw compressor element (1–3 kg). This reflects the high intake volume of Centac machines, where the larger filtration area maintains low face velocity and low resistance.

Centac units are 100% oil-free. Without lubricating oil in the compression chamber to carry away contaminants, dust that enters deposits directly on the impeller, diffuser, and intercooler. Impeller fouling alters dynamic balance and aerodynamic efficiency; intercooler tube fouling raises interstage temperature and reduces overall efficiency.

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 Ref.	1X9428
Construction	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 3 months, or per 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	Not rated under EN 779; centrifugal inlet elements are characterized per ISO 5011 by efficiency, inlet resistance, and dust holding capacity
Initial Pressure Drop	Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O)
Alarm / Final Resistance	Per unit inlet differential pressure gauge

Centac impellers rotate at tens of thousands of rpm with narrow blade passages. Particle impact velocity is far higher than in screw compressors, so erosion from the same particle size is more significant. Once intercooler tubes foul, cleaning requires shutdown and disassembly.

Construction & Materials

Parameter	Value / Note
Media	Imported wood pulp filter paper (commonly US HV or Ahlstrom)
Media Weight	Approx. 130 g/m²
Inner / Outer Support	Galvanized steel perforated cage (inner core + outer guard)
End Caps	Metal end caps (galvanized steel) with polyurethane adhesive
Seal	NBR rubber gasket
Bonding	Polyurethane (PU) hot melt adhesive

Operating & Service Conditions

Parameter	Value / Note
Operating Temperature	−10 to +100 °C
Relative Humidity	≤80% RH, no condensation
Burst Strength	Filter paper approx. 200–400 kPa (per ISO 2758)
Service Life	Approx. 2,000 hours or 3 months
Storage Shelf Life	Approx. 2–3 years (unopened, dry ventilated conditions)

Standards

Item	Content
Applicable Product Standard	ISO 5011 (inlet air filters for internal combustion engines and compressors — performance testing): efficiency, inlet resistance, dust holding capacity
Other Common References	ANSI/CAGI ADF 400-1999 (compressed air and gas), ISO 8573-4 (compressed air — solid particle measurement)
Industry-Referenced Test Standards	ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968
Standard Applicability Note	The ISO 29xx / 37xx series are general test methods for hydraulic transmission filters. If a supplier can only provide hydraulic filter standards, request ISO 5011 or the original manufacturer specification sheet.
Oil-Free Certification Background	The Centac units this element serves are ISO 8573-1 Class 0 oil-free certified. Inlet filtration is the first safeguard maintaining that oil-free class.

Installation Steps

Centrifugal machines require zero-speed confirmation before work begins. Allow approximately 40–60 minutes. The element weighs 5.4 kg, so use safe lifting and handling measures.

1. Shut down and lock out. Stop the unit and wait for the controller to confirm zero speed (do not judge by sound). Isolate main power and apply lockout/tagout.
2. Open the inlet filter housing. The housing is upstream of the inlet guide vanes. Loosen cover fasteners evenly in a diagonal sequence. Support large covers before releasing the final fastener.
3. Remove the old element and inspect for dust tracks. Note any dust trails on the housing inner wall — these indicate seal bypass. No dust track means the seal was effective.
4. Clean the housing and sealing face. Wipe with a dry lint-free cloth. Do not blow compressed air into the housing interior — this drives dust into the intake.
5. Verify the new element. Compare part number, dimensions, seal integrity, and media condition against the old element. Confirm dimensions by measurement.
6. Install and seat the element. Confirm full seating at the base, seal face contact without trapped material, and centered alignment. Seal compression marks should be even all around.
7. Refit the cover and check the differential pressure lines. Tighten diagonally in stages. Confirm the gauge impulse lines are clear, unblocked, and not frozen — a blocked line gives a false clean reading.
8. Start per the centrifugal startup procedure and verify. After stable operation, read inlet differential pressure; it should return to the clean-element baseline range. Listen for leaks. Record date, running hours, and differential pressure.

FAQ

Which machines use 67754101?

Ingersoll Rand Centac centrifugal compressors: Centac, Centac C Series, and CN Series. Exact fitment requires the unit nameplate and serial number for cross-reference.

How do I know when to replace it?

Two methods: read the unit inlet differential pressure gauge (most reliable, reflects actual dust load), or use 2,000 hours / 3 months as a reference. The gauge takes priority — dust loading varies widely by site.

Can I clean and reuse it?

No. This is a dry disposable element and is not designed for cleaning. Blowing it out with compressed air damages the media structure and creates invisible passages that let unfiltered air through.

What else should I check during replacement?

Inlet guide vane linkage, intake silencer, intercooler tube bundles, and housing sealing faces. For water-cooled units, also check water-side scaling on the coolers. Always confirm the differential pressure impulse lines are clear.

Is 67754101 the same as 67765362?

No. Both names contain "inlet air filter" wording (67754101 = Element, Inlet Air Filter; 67765362 = Intake Air Filter Core), but they are different part numbers. Read the number on the old element itself before ordering.

How do I confirm dimensions?

Measure the old element (outer diameter, inner diameter, height) or request the specification drawing from Ingersoll Rand. Do not substitute another part number based on weight or appearance.

Lead time and availability?

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 time of inquiry.

Compatible Models

No.	Model	Note
1	Centac	Main centrifugal series, multi-stage multi-shaft geared design
2	Centac C Series	Common models C400, C700, C700e, C1000, C2000, C3000 and others
3	CN Series	Another model designation in the Centac family

Centac is Ingersoll Rand's centrifugal compressed air series, using multi-shaft internal gear drive and multi-stage compression. Output ranges from approximately 720–51,000 m³/h depending on model, with pressure from 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.

• The table above shows the fitment range; individual fitment must be confirmed with the unit nameplate and serial number.
• Large Centac units typically use multiple elements in the inlet system; confirm the quantity per unit before ordering.
• If unsure which series your unit belongs to, provide a nameplate photo and we will verify by serial number.

Related Parts

Part	Location	Function	Check Point
Intake Air Filter Core	Inlet filter housing	Similar-named alternate part number (67765362 in local manual)	Verify body number when ordering; do not confuse with 67754101
Differential Pressure Gauge	On inlet filter housing	Indicates element dust load; authoritative basis for replacement timing	Verify needle returns to zero; impulse lines clear and not frozen
Inlet Guide Vane Assembly	Downstream of filter, upstream of first stage impeller	Regulates intake volume and angle for capacity control	Check linkage for sticking or looseness; vane fouling affects control accuracy
Intake Silencer	Intake ducting	Reduces intake 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; 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 & Bearing Lubrication Parts	Gear speed increaser	Lubricates gears and high-speed bearings (isolated from compression chamber)	Test oil per unit requirements; monitor oil level and temperature

Recommended practice: centrifugal maintenance value centers on efficiency retention. Check the differential pressure gauge, guide vane mechanism, and intercooler condition at every element change to make full use of each shutdown window. Cooler cleaning and impeller inspection should be part of annual planned maintenance.

Procurement & OEM Support

We supply replacement inlet air filter elements for Ingersoll Rand Centac centrifugal compressors with export-ready packing and documentation. OEM and private-label programs are available for qualified volume buyers. To confirm fitment, provide the unit nameplate photo, serial number, or the part number stamped on the old element. Request a quotation or datasheet for current pricing, stock, and lead time.