Ingersoll Rand 67754101 Centac Inlet Air Filter Element

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 impeller blades and intercooler passages.

This element is significantly larger and heavier than standard screw compressor filters: net weight is approximately 5.4 kg (11.94 lbs), two to three times that of a typical rotary screw air filter (usually 1–3 kg). This reflects the high inlet flow of Centac machines, which can range from tens to hundreds of cubic metres per minute, requiring greater filtration area to maintain low face velocity and low resistance.

Because Centac compressors are 100% oil-free, any dust that enters the compression path deposits on the impeller, diffuser and intercooler. Impeller fouling alters dynamic balance and aerodynamic efficiency; intercooler tube fouling raises interstage temperature and reduces overall efficiency. For continuous-duty Centac units, the cost of unplanned downtime typically far exceeds the cost of the filter element itself.

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 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 Change Interval	Approx. 2,000 hours, 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
Test Standard	ISO 5011 (inlet air filter performance — efficiency, restriction, dust capacity). Not classified under EN 779 HVAC filter grades.

Flow and Resistance

Parameter	Value / Note
Initial Pressure Drop	Approx. 0.5–1.0 kPa (50–100 mmH₂O)
Alarm / Final Resistance	Per compressor inlet differential pressure gauge
Energy Impact	Higher inlet restriction lowers inlet air density, increasing power required to maintain pressure and flow, raising specific power.

Construction and Materials

Parameter	Value / Note
Filter Media	Imported wood pulp filter paper (typically HV or Ahlstrom grade)
Media Weight	Approx. 130 g/m²
Support Structure	Galvanised steel perforated inner and outer cages
End Caps	Metal end caps (galvanised steel) with polyurethane adhesive
Seal	NBR rubber seal
Bonding	Polyurethane (PU) hot-melt adhesive

Operating Conditions

Parameter	Value / Note
Operating Temperature	−10 to +100 °C
Relative Humidity	≤80% RH, non-condensing
Burst Strength	Filter paper approx. 200–400 kPa (per ISO 2758)
Collapse Resistance	Element must withstand inlet alarm differential pressure without collapse
Special Features	No flame-retardant, anti-static or special coating specified for this model

Service Life and Maintenance

Parameter	Value / Note
Service Life	Approx. 2,000 hours
Actual Replacement	Per 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)

Applicable Standards

Item	Details
Product Standard	ISO 5011 — inlet air filter performance testing (efficiency, restriction, dust capacity)
Other References	ANSI/CAGI ADF 400-1999, ISO 8573-4 (compressed air — solid particle measurement)
Common Industry Test Standards	ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968
Note	The ISO 29xx / 37xx series are hydraulic filter test methods. If a supplier can only provide hydraulic filter standards, request ISO 5011 or OEM specification data.
Oil-Free Context	Centac compressors served by this element are ISO 8573-1 Class 0 oil-free certified; inlet filtration is the first safeguard for maintaining that class.

Installation and Maintenance Steps

Centac centrifugal compressors differ from screw machines: the impeller has high rotational inertia and the controller must confirm zero speed before work begins. Allow 40–60 minutes per job; the 5.4 kg element requires safe lifting and handling, and two people may be needed depending on housing size.

1. Stop, confirm zero speed, lock out/tag out. Stop the compressor and wait for the controller to confirm zero speed (do not judge by sound). Isolate main power and apply lockout/tagout. Criterion: controller shows zero speed, no inertial rotation noise.
2. Open the inlet filter housing. The housing is upstream of the inlet guide vanes. Loosen end cover clamps or fasteners evenly in a diagonal sequence. Criterion: on large housings, support the cover before releasing the last fastener to prevent sudden drop.
3. Remove old element and inspect housing for dust tracks. Withdraw the old element carefully — it is heavy and the filter paper can deform if crushed. Look for dust tracks on the inner housing wall; these indicate seal bypass where unfiltered air has passed the seal. Criterion: no dust tracks means the seal was effective.
4. Clean housing and sealing surfaces. Wipe the inner wall, base and sealing face with a dry lint-free cloth. Do not blow compressed air into the housing — this drives dust into the intake. Criterion: no loose dust, sealing face flat with no pitting or corrosion.
5. Verify the new element. Compare with the old part: part number, dimensions, seal integrity, filter paper condition. Criterion: part number and dimensions must match exactly before installation. Measure the old element to confirm dimensions (see Technical Parameters).
6. Install the new element and confirm seating. Place the 67754101 into the housing, ensuring full seating at the base, seal face contact without trapped material, and centred alignment. Criterion: even compression marks around the seal face.
7. Refit cover and check differential pressure gauge lines. Refit the cover and tighten evenly in diagonal stages. Before start-up, confirm the inlet differential pressure gauge impulse lines are clear, unobstructed and not frozen. Criterion: clear lines; a blocked line gives a false clean reading and can lead to over-extended element use.
8. Start per Centac procedure and verify. Start according to the machine's procedure. Once stable, read inlet differential pressure — it should return to the clean element baseline range. Listen for air leaks at the housing. Criterion: normal differential pressure, no abnormal noise; record date, running hours and differential pressure reading.

Centac-specific rule: seal bypass is more damaging on a centrifugal compressor. Screw machines have oil that carries away some particles; Centac compression chambers are oil-free, so particles deposit entirely on the impeller and coolers. A single seal failure can require impeller dynamic balancing.

Frequently Asked Questions

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

How do I know when to replace it?
Two methods: (1) read the inlet differential pressure gauge — most reliable, reflects actual dust loading; (2) use the 2,000-hour interval as a reference. The gauge reading takes priority because dust loading varies widely by site.

How much does a dirty filter affect Centac efficiency?
Higher inlet vacuum lowers inlet air density; the compressor must increase power to maintain pressure and flow, raising specific power. For continuous-duty Centac units, annual energy loss typically far exceeds the cost of the element.

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

What else should I check during replacement?
Inlet guide vane linkage, intake silencer, intercooler tube bundles, housing sealing faces. For water-cooled models, also check water-side scaling, which directly affects interstage temperature. Always check the differential pressure gauge impulse lines.

Can this filter be used on a screw compressor?
No. At approximately 5.4 kg, it is two to three times the weight of a screw compressor filter. Dimensions, filtration area and resistance characteristics are designed for the high inlet flow of centrifugal machines. They 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 they are different part numbers. Before ordering, read the number on the old part itself — do not rely on the name.

How do I confirm dimensions?
Measure the old element (outside diameter, inside diameter, height) or obtain a specification drawing from Ingersoll Rand. Do not substitute other part numbers based on weight or appearance.

Is it in stock? 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 at time of inquiry based on stock and shipping schedule.

How can I be 100% sure of the correct part number?
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. Step 3 is the most reliable.

Compatible Models

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

No.	Compatible Model	Note
1	Centac	Main centrifugal series, including multi-stage, multi-shaft gear-driven designs
2	Centac C Series	Common models C400, C700, C700e, C1000, C2000, C3000 and others

Centac background: Centac is Ingersoll Rand's centrifugal compressed air brand, using multi-shaft internal gear transmission and multi-stage compression. Flow covers approximately 720–51,000 m³/h depending on model, with pressure range approximately 0.7–22.5 bar. Units are 100% oil-free and generally carry ISO 8573-1 Class 0 oil-free certification, widely used in electronics, pharmaceutical, petrochemical and textile industries where air purity is critical.

Notes:

• The table shows compatibility range; individual fitment must be confirmed by machine nameplate and serial number.
• Large Centac units often use multiple filter elements; the number per unit varies by model. Confirm the filter configuration quantity before ordering.
• If you are unsure which series your machine belongs to, provide a nameplate photo and we will cross-reference by serial number.

Related Parts

The inlet and lubrication systems of a Centac centrifugal compressor include 7 components commonly maintained on the same cycle as the air filter. For specific part numbers, refer to the machine's Centac parts manual.

Component	Location	Function	Inspection Point
Intake Air Filter Core	Inlet filter housing	Similar name, different part number (67765362 in local manual)	Verify part number on old part; do not confuse with 67754101
Differential Pressure Gauge	Inlet filter housing	Indicates element dust loading; authoritative for replacement timing	Check needle returns to zero; impulse 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 sticking or looseness; vane fouling affects control accuracy
Intake Silencer	Inlet duct	Reduces intake noise; some models also straighten airflow	Check for corrosion perforation and silencer material detachment
Intercooler Tube Bundles	Between compression stages	Reduces interstage temperature; key to centrifugal efficiency	Check air-side fouling; for water-cooled models also check water-side scaling
Aftercooler	After final stage	Cools discharge air to set temperature	Blocked tubes directly raise discharge temperature
Gearbox and Bearing Lubrication Parts	Gearbox	Lubricates gears and high-speed bearings (isolated from compression chamber)	Test oil per machine requirements; monitor oil level and temperature

Recommended companion checks: Centac maintenance value centres on efficiency retention. At each inlet filter change, inspect the differential pressure gauge, guide vane linkage and intercooler condition to make full use of the downtime window. Cooler cleaning and impeller inspection should be included in annual planned maintenance rather than deferred until efficiency drops noticeably.