Product
Ingersoll Rand Centac centrifugal air compressor intake filter element 67754101 | Drawing No. 1X9428
Ingersoll Rand intake filter element specifically for Centac centrifugal air compressors, drawing number 67754101, manual figure position 1X9428. Compatible with Centac, Centac C Series, and CN Series models; net weight approximately 5.4 kg per unit. Filtration rating 5–10 μm, efficiency ≥98%, recommended replacement interval approximately 2000 hours or 3 months, or as indicated by the intake differential pressure gauge. Installed upstream of the first-stage impeller to protect the impeller and interstage cooler. Compatibility verification by serial number is supported.
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I. Product Overview
67754101 is the inlet air filter element (Element, Inlet Air Filter) for the Ingersoll Rand Centac centrifugal air compressor.
Installation location: installed inside the centrifugal compressor's inlet filter housing, upstream of the inlet guide vanes and the first stage impeller. Air must be sufficiently clean before entering the first stage impeller; the inlet filter element is the particle barrier for the impeller blades and the interstage cooler passages.
The net weight of a single unit is approximately 5.4 kg (about 11.94 lbs), which is two to three times that of the same manufacturer's screw compressor air filter elements (typically 1–3 kg), reflecting the high inlet air volume conditions of the centrifugal compressor. Centac unit inlet flow can reach from tens to hundreds of cubic meters per minute, and the filter element must maintain low face velocity and low resistance with a larger filtration area.
The Centac unit is a 100% oil-free (Oil-Free) model; there is no lubricating oil circulation in the compression chamber to carry away impurities. Once dust enters, it can only deposit on the impeller, diffuser, and interstage cooler. Impeller fouling will change the dynamic balance and aerodynamic efficiency, and fouling of the interstage cooler tube bundle will raise the interstage temperature and reduce overall unit efficiency.
Core Specifications at a Glance
| Item | Value |
|---|---|
| Part Number | 67754101 |
| Name | Inlet Air Filter Element / Element, Inlet Air Filter |
| Brand | Ingersoll Rand / Ingersoll Rand |
| Applicable Models | Centac, Centac C Series, CN Series centrifugal air compressors |
| Manual Reference | 1X9428 |
| Structure Type | Dry disposable inlet filter element |
| Net Weight per Unit | Approx. 5.4 kg (11.94 lbs) |
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% |
| Recommended Replacement Interval | Approx. 2000 hours or 3 months, or subject to the unit's inlet differential pressure gauge |
II. Basic Parameters
| Parameter | Content |
|---|---|
| Part Number | 67754101 |
| Manual Reference (Ref.) | 1X9428 |
| Brand | Ingersoll Rand / Ingersoll Rand |
| Product Name | Inlet Air Filter Element / Element, Inlet Air Filter |
| Product Category | Centrifugal compressor inlet filtration (Centac Centrifugal Parts) |
| Applicable Models | Centac, Centac C Series, CN Series |
| Installation Location | Inside the inlet filter housing, upstream of the inlet guide vanes and first stage impeller |
| Structure Type | Dry disposable element (Dry Disposable Element) |
| Net Weight per Unit | Approx. 5.4 kg (11.94 lbs) |
| Replacement Interval | Approx. 2000 hours or 3 months, or subject to the differential pressure gauge |
Fitment confirmation method: The Centac series model range is very broad (C400–C3000 and larger models), and the filter element configuration varies with model and unit version. Precise fitment requires checking against the Ingersoll Rand centrifugal compressor parts catalog using the unit nameplate and serial number, or providing a nameplate photo for our reverse lookup.
Note the distinction from similar part numbers: the same Centac parts list also includes 67765362 (Intake air filter core). The two have similar names but are different part numbers; before ordering, please verify the number on the old part itself and do not judge by name alone.
III. Product Technical Parameters
1. Filtration Performance Parameters
| Parameter | Value / Description |
|---|---|
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% (for particles ≥5 μm) |
| Filter Class | Does not apply the ventilation and air-conditioning filter classification system (EN 779); centrifugal compressor inlet filter elements are characterized per ISO 5011 by filtration efficiency + inlet resistance + dust holding capacity |
| Dust Holding Capacity | — |
Why centrifugal compressors are more sensitive to inlet air cleanliness: Centac impellers rotate at speeds up to tens of thousands of revolutions per minute, the blade passages are narrow, and the relative velocity of particles impacting the impeller is much higher than that of screw compressor rotors. Particles of the same size have a more significant erosion effect on centrifugal compressors; once the interstage cooler tube bundle is fouled, cleaning requires shutdown and disassembly, which is unplanned overhaul work.
2. Flow and Resistance Parameters
| Parameter | Value / Description |
|---|---|
| Rated Air Handling Capacity | — |
| Filtration Face Velocity | — |
| Initial Pressure Drop (Initial Resistance) | Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O) |
| Operating Differential Pressure Range | From the initial resistance of a new element to the alarm resistance |
| Alarm Resistance / Final Resistance | Determined by the indication of the unit's inlet differential pressure gauge (Differential Pressure Gauge) |
| Pressure Drop–Energy Consumption Relationship | Increased inlet resistance → decreased inlet density → the unit must increase power to maintain pressure and flow → specific power increases |
Relationship between pressure drop and energy consumption: The Centac is a centrifugal unit, and its air delivery capacity depends on inlet density. After dust accumulation on the filter element raises the inlet negative pressure, the pressure and density of the air entering the first stage impeller both decrease, and the unit must increase speed or power to maintain the set discharge pressure and flow, causing specific power to rise accordingly. Centrifugal compressors are mostly medium-to-large continuous-operation equipment, and this energy loss, annualized, usually far exceeds the cost of a set of filter elements—which is why Ingersoll Rand equips centrifugal compressors with inlet differential pressure indication.
3. Structural Dimensions and Installation Parameters
| Parameter | Value / Description |
|---|---|
| Overall Dimensions | — |
| Structure Type | Cylindrical inlet filter element (Element type, installed in the filter housing) |
| Net Weight per Unit | Approx. 5.4 kg (11.94 lbs) |
| Effective Filtration Area | — |
| Number of Pleats / Pleat Pitch | — |
| Installation Interface | Installed in the Centac inlet filter housing, end-face compression seal |
| Sealing Type | End-face seal (axial compression) |
About dimensions: Before ordering, please confirm the external dimensions by any of the following methods: ① Measure the old part (outer diameter, inner diameter, and height — three items, recommended); ② Request the specification drawing for this part from Ingersoll Rand; ③ Provide photos of the old part and measured values for our review. Do not substitute other part numbers based on weight or appearance analogy.
For reference: The net weight of this product is approximately 5.4 kg, which is 2–3 times that of a conventional screw compressor air filter element (1–3 kg), and it is a large filter element for centrifugal machines. Do not directly substitute other part numbers based on weight analogy.
4. Material Composition
| Parameter | Value / Description |
|---|---|
| Filter media | Imported wood pulp filter paper (commonly used in the industry: American HV or Ahlstrom filter paper) |
| Filter media basis weight | Approximately 130 g/m² |
| Inner and outer frames | Galvanized steel perforated frames (inner frame + outer protective mesh) |
| End caps | Metal end caps (galvanized steel plate) + polyurethane adhesive |
| Seals | Nitrile rubber (NBR) sealing rings |
| Bonding layer | Polyurethane (PU) hot-melt adhesive |
5. Operating Condition Tolerance Parameters
| Parameter | Value / Description |
|---|---|
| Operating temperature | −10 ~ +100 ℃ |
| Relative humidity | ≤80% RH, and no condensation |
| Bursting strength | Filter paper bursting strength approximately 200–400 kPa (determined per ISO 2758 paper bursting strength test) |
| Collapse resistance | The filter element should be able to withstand the unit's intake alarm differential pressure without collapsing |
| Special functions | No flame retardant, anti-static, special coating, or other markings are indicated for this model |
6. Service Life and Maintenance Parameters
| Parameter | Value / Description |
|---|---|
| Service life | Approximately 2000 hours or 3 months |
| Actual replacement interval | Based on the unit's intake differential pressure gauge; should be shortened in coastal (salt spray), desert (fine dust), and industrial area (process dust) environments |
| Shelf life | Approximately 2–3 years (unopened, dry and ventilated conditions) |
About the replacement interval: The standard interval is 2000 hours or 3 months, whichever comes first. For Centac centrifugal compressors, the unit's intake differential pressure gauge reading is a more reliable basis; differences in environmental dust load can cause the actual interval to vary by multiples.
7. Applicable Standards
| Item | Content |
|---|---|
| Applicable product standard | ISO 5011 (Inlet air cleaning equipment for internal combustion engines and compressors — performance testing), with evaluation items being filtration efficiency, intake resistance, and dust holding capacity |
| Other commonly referenced standards | ANSI/CAGI ADF 400-1999 (compressed air and gas), ISO 8573-4 (compressed air — measurement of solid particles) |
| Industry commonly cited test standards | ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968 |
| Standard applicability note | The above ISO 29xx / 37xx series are actually general test methods for hydraulic transmission filter elements. During procurement, if a supplier can only provide hydraulic filter element standards, they should be required to supplement with ISO 5011 or the original manufacturer's specification sheet. |
| Oil-free certification background | The Centac unit served by this filter element is an ISO 8573-1 Class 0 oil-free certified model; intake filtration is the first line of assurance for maintaining the oil-free rating |
IV. Standard Maintenance and Installation Steps
Centrifugal compressor work differs from screw compressor work: the impeller has a large moment of inertia, and you must wait for the controller to confirm zero speed. A single job takes about 40–60 minutes; depending on housing size, two people may be needed or mechanical assistance may be required (this product has a net weight of 5.4 kg, so stable lifting and handling measures must be in place).
Shut down, confirm zero speed, and apply lockout/tagout. Stop the unit and wait for the controller to confirm zero speed (do not judge by sound). Cut off the main power supply and apply lockout/tagout. Criterion: the controller shows zero speed and there is no sound of inertial rotation.
Open the intake filter housing. The housing is located upstream of the Inlet Guide Vane. Loosen the end cover latches or fasteners evenly in a diagonal sequence. Criterion: for large housings, someone should hold the end cover before the last fastener is loosened to prevent it from suddenly falling.
Remove the old filter element and inspect the housing interior for dust traces. Pull out the old filter element. This product is heavy; support it firmly to avoid squeezing and deforming the filter paper. Focus on observing whether there are dust trail bands on the inner wall of the housing; the presence of trails indicates seal bypass, meaning unfiltered air has bypassed the seal. Criterion: no dust trails on the inner wall means the seal is good.
Clean the housing and sealing surface. Wipe the inner wall, bottom, and sealing surface of the housing clean with a dry, lint-free cloth. Do not blow compressed air forcefully into the housing interior (this will blow accumulated dust into the intake duct). Criterion: no loose dust on the inner wall, and the sealing surface is flat with no pits or corrosion pitting.
Verify the new filter element. Compare it item by item with the old part: part number, external dimensions, seal strip integrity, and no damage to the filter paper. Criterion: installation is permitted only when the part number and dimensions all match; the dimensions of this product must be confirmed by actual measurement (see the explanation in Section III).
Install the new filter element and confirm seating. Place 67754101 into the housing and confirm that the bottom is fully seated, the sealing surface fits with no trapped material, and the filter element is centered without skewing. Criterion: the compression marks around the sealing surface are even and consistent.
Reinstall the end cover and check the differential pressure gauge impulse line. Reinstall the end cover and tighten it evenly in multiple diagonal passes. Before startup, confirm that the intake differential pressure gauge impulse line is unobstructed, not blocked, and not frozen. Criterion: the line is unobstructed; a blocked impulse line will give a "falsely clean" reading, causing the filter element to be used beyond its service life.
Start according to the centrifugal compressor startup procedure and verify. Start according to the unit's specified procedure. After stable operation, read the intake differential pressure; it should return to the baseline range for a clean filter element; listen to the housing for air leakage sounds. Criterion: differential pressure reading is normal and there is no abnormal noise; record the date, operating hours, and differential pressure reading.
Iron rule specific to centrifugal compressors: the harm of sealing surface bypass is amplified on centrifugal compressors. Screw compressors still have lubricating oil to carry away some particles, but the compression chamber of a centrifugal compressor is oil-free, so all particles deposit on the impeller and cooler. The cost of a single seal failure may be one impeller dynamic balance correction.
V. Frequently Asked Questions
Which machines is 67754101 used on?
Ingersoll Rand Centac centrifugal air compressors; the compatible models are Centac, Centac C Series, and CN Series. The Centac model lineage spans a very wide range, and precise compatibility requires checking the unit nameplate and serial number.
How do I determine whether it should be replaced?
Two approaches: ① Read the unit's intake differential pressure gauge (the most reliable, reflecting the actual amount of accumulated dust); ② Use 2000 hours or 3 months as a reference. The differential pressure gauge criterion takes priority; dust loads vary greatly from place to place, so replacing on a fixed cycle either wastes service life or results in overrun operation.
How much does filter element dust accumulation affect centrifugal compressor efficiency?
An increase in intake negative pressure causes intake density to decrease, and the unit must increase power to maintain pressure and flow, so specific power rises accordingly. The Centac is a medium-to-large unit operating continuously, and this portion of energy consumption, annualized, usually far exceeds the cost of the filter element.
Can it be blown clean and reused?
No. This is a dry, disposable filter element and is not designed to be cleaned. Back-blowing with compressed air will damage the fiber structure of the filter paper and create invisible channels that allow unfiltered air to pass directly through, which is more dangerous than not replacing it.
What else should be checked when replacing the filter element?
The inlet guide vane linkage mechanism, intake silencer, interstage cooler tube bundle, and housing sealing surface. For water-cooled models, also pay attention to scaling on the water side of the cooler, which directly affects the interstage temperature. Also be sure to check whether the differential pressure gauge impulse line is unobstructed.
Can this filter element be interchanged with a screw compressor air filter?
No. This product has a net weight of about 5.4 kg, which is 2–3 times that of a screw compressor air filter element. Its dimensions, filtration area, and resistance characteristics are all designed for the high intake volume conditions of centrifugal compressors, and the two are not interchangeable.
Are 67754101 and 67765362 the same part?
No. Both part names contain the words "intake filter element" (67754101 = Element, Inlet Air Filter; 67765362 = Intake Air Filter Core), but the part numbers are different. Before ordering, please read the number on the old part itself and do not judge by name.
How should the dimensions be confirmed?
For external dimensions, use actual measurements of the old part (outer diameter, inner diameter, and height) as the standard, or request a specification drawing from Ingersoll Rand. Do not apply other part numbers by analogy based on weight or appearance.
Is it in stock? What is the lead time?
Regular stock items ship within 24 hours. Southeast Asia is about 3–7 days, the Middle East about 7–10 days, Africa and Latin America about 10–18 days, and Russia/Belarus about 10–15 days. The specific timing is subject to stock and shipping schedule at the time of inquiry.
How can I be 100% sure the part number is correct?
Three steps: ① Check the unit nameplate to confirm it belongs to the Centac series; ② Provide the serial number so that we can cross-check it against the centrifugal compressor parts catalog; ③ Read the drawing number on the old filter element itself. The third step is the most reliable.
VI. Machine Models Compatible with This Part
This part number is compatible with Ingersoll Rand Centac centrifugal air compressors. The compatibility range is as follows:
| No. | Compatible Model | Description |
|---|---|---|
| 1 | Centac | Main centrifugal compressor series, including multistage multi-shaft gear-driven structures |
| 2 | Centac C Series | Common models include C400, C700, C700e, C1000, C2000, C3000, etc. |
| 3 | CN Series | Another model designation in the Centac family |
Background on the Centac model
Centac is Ingersoll Rand's brand of centrifugal compressed air units, featuring a multi-shaft internal gear drive and multi-stage compression structure, with output flow covering approximately 720–51,000 m³/h (depending on model) and a pressure range of approximately 0.7–22.5 bar. The units are 100% oil-free designs and generally hold ISO 8573-1 Class 0 oil-free certification. They are commonly used in electronics, pharmaceuticals, petrochemicals, textiles, and other industries with high requirements for air source cleanliness.
Key points for reading the table
- The table above shows the compatible range; individual compatibility must be confirmed against the unit nameplate and serial number.
- The intake system of large Centac units is usually equipped with multiple filter elements, and the number used per unit depends on the model; before purchasing, it is recommended to confirm the number of filter elements configured for the unit.
- If you are unsure which series the unit belongs to, simply provide a photo of the nameplate, and we will confirm by looking up the serial number.
VII. Related components
In the intake and lubrication systems of Centac centrifugal machines, there are 7 components maintained on the same cycle as the air filter. They are listed below by "location—function—inspection points." For specific part numbers, please refer to the Centac parts manual for the unit.
| Component | Location | Function | Inspection points |
|---|---|---|---|
| Intake Air Filter Core | Intake filter housing | Another part number with a name similar to this item (67765362 is found in the local manual) | Verify the body number when ordering; do not confuse it with 67754101 |
| Differential Pressure Gauge | On the intake filter housing | Indicates the degree of dust accumulation on the filter element and is the authoritative basis for determining replacement timing | Check whether the needle returns to its normal position; the pressure sensing line must be unobstructed and free of ice |
| Inlet Guide Vane Assembly | Downstream of the filter, upstream of the first-stage impeller | Regulates intake volume and intake angle to achieve capacity control | Check the linkage mechanism for sticking or looseness; dirt buildup on the guide vanes affects regulation accuracy |
| Intake Silencer | On the intake piping | Reduces intake noise; on some models it also serves as airflow rectification | Check for corrosion perforation and detachment of silencing material |
| Intercooler Tube Bundles | Between compression stages | Reduces interstage air temperature and is a key link in centrifugal machine efficiency | Check for fouling on the air side; for water-cooled models, also check for scaling on the water side |
| Aftercooler | After final-stage discharge | Cools the exhaust air to the set temperature | Blocked tube bundles will directly raise the exhaust temperature |
| Gearbox and bearing lubrication system components | Gear speed-increasing box | Lubricates gears and high-speed bearings (isolated from the compression chamber) | Test the oil according to unit requirements; pay attention to oil level and oil temperature |
Recommended accompanying replacement: the maintenance value of a centrifugal machine centers on "efficiency maintenance." It is recommended to check the intake differential pressure gauge, guide vane mechanism, and intercooler condition at the same time as each intake filter element replacement, making full use of the window of a single shutdown. Cooler cleaning and impeller inspection should be included in the annual planned maintenance and should not wait until efficiency has noticeably declined.