Product
Ingersoll Rand 47701891001 Air Filter Element | Replaces 39903281
Ingersoll Rand 47701891001 air filter element (previous PN 39903281) for 90–160 kW VPeX screw compressors including M350-3S and 125S–200S. 5–10 μm filtration, ≥98% efficiency, approx. 380 mm OD × 178 mm height, 2000 h / 3-month service interval.
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Product Overview
47701891001 is the intake air filter element for Ingersoll Rand oil-lubricated screw air compressors in the 90–160 kW range. It replaces the original part number 39903281 — both numbers refer to the same element, and older drawings and spare-parts lists typically show 39903281.
The element sits inside the external intake filter assembly, upstream of the airend inlet, and forms the first filtration stage on the intake path. When the compressor draws in ambient air, dust, grit, fibers and airborne debris come with it; the filter media blocks these contaminants before they reach the screw rotors. Once the element fails, unfiltered air enters the airend directly and accelerates wear on the rotors, bearings and lubricant in sequence.
This element is used on Ingersoll Rand screw compressors in the 90–160 kW power band, typically M350-3S, 125S/150S/175S/200S, and ML/MM/MH 90–160, MM90–110, M90/M110 platforms of the same power class. This power band belongs to the VPeX platform within the Ingersoll Rand product system. The NG R-Series at the same 90–160 kW rating, and larger models such as M250, use different air filter part numbers and are not interchangeable across platforms (see the cross-platform table in Section 6).
Core Specifications
| Item | Value |
|---|---|
| Part Number | 47701891001 |
| Previous PN | 39903281 |
| Description | Air Filter Element |
| Brand | Ingersoll Rand |
| Applicable Power Band | 90–160 kW |
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% (for particles ≥5 μm) |
| Dimensions | Approx. 380 mm OD, approx. 178 mm overall height |
| Recommended Service Interval | 2000 hours or 3 months |
Basic Parameters
| Parameter | Detail |
|---|---|
| Part Number | 47701891001 |
| Previous PN | 39903281 |
| Brand | Ingersoll Rand |
| Product Name | Air Filter Element |
| Product Category | Intake filtration (Air Filter) |
| Applicable Platform | Ingersoll Rand 90–160 kW screw compressors (VPeX platform) |
| Typical Models | M350-3S, 125S/150S/175S/200S, ML/MM/MH 90–160, MM90–110, M90/M110 |
| Installation Position | Inside external intake filter assembly, upstream of airend inlet |
| Quantity per Machine | Per intake assembly configuration: 2 pcs per machine for 125S–200S series; 1 pc per machine for MM90–110 |
| Service Interval | 2000 hours or 3 months |
Fitment Verification
Ingersoll Rand machines in the same power band may use more than one intake filtration configuration; part numbers can look similar but are not interchangeable. Before ordering, verify three points: (1) the part number stamped on the old element's end cap or frame matches the ordered number (if the old part is stamped 39903281, it is the same element as this part number); (2) the machine nameplate model and power rating fall within the 90–160 kW band; (3) the old element's installation position — on machines with two-stage intake, the primary and safety filter positions use different part numbers.
Note that this number and 47701890001 in the same batch share the same name and are both air filter elements, but they correspond to different intake configurations. They must be verified separately by part number and cannot be substituted based on name similarity.
Technical Specifications
1. Filtration Performance (Core Metrics)
| Parameter | Value / Notes |
|---|---|
| Filtration Rating | 5–10 μm |
| Filtration Efficiency | ≥98% (for particles ≥5 μm) |
| Filter Class | Characterized per ISO 5011 by efficiency, resistance and dust holding capacity; HVAC classification systems (G4 / F7 etc.) do not apply |
| Dust Holding Capacity | Directly related to on-site dust concentration; no universal nominal value. Replace based on intake differential pressure gauge reading |
Filtration rating and efficiency should be read as a pair. An element with high rating but low dust holding capacity builds resistance quickly and requires frequent replacement, driving up total cost of ownership. This design aims to maintain sufficient dust holding space at 5–10 μm rating for continuously running 90–160 kW machines.
2. Flow and Resistance Parameters
| Parameter | Value / Notes |
|---|---|
| Rated Air Flow | Must be no less than machine rated intake volume; 90–160 kW machines typically draw approximately 15–27 m³/min, based on machine discharge and corrected for intake temperature and altitude |
| Initial Pressure Drop | Approx. 0.3–0.5 kPa for a clean new element |
| Operating Differential Range | Rises gradually with dust loading; normal operating range approx. 0.5–1.5 kPa |
| Alarm / Final Resistance | Typical replacement threshold approx. 1.5–2.5 kPa; machine intake vacuum gauge / differential pressure gauge reading is the final criterion |
| Pressure Drop vs. Energy Consumption | Each 1 kPa increase in intake resistance raises the compression ratio by approx. 1%, increasing machine energy consumption by approx. 1.0% |
Pressure drop vs. energy consumption detail (theoretical calculation at 0.85 MPa discharge gauge pressure)
| Intake Resistance | Compression Ratio | Energy Increase |
|---|---|---|
| 0 kPa (new element) | 9.39 | Baseline |
| 0.5 kPa | 9.44 | +0.5% |
| 1.0 kPa | 9.49 | +1.0% |
| 1.5 kPa | 9.53 | +1.5% |
| 2.0 kPa | 9.58 | +2.0% |
| 2.5 kPa | 9.63 | +2.5% |
From installation to reaching the replacement threshold, intake resistance rises by more than 2 kPa, and machine energy consumption increases by approximately 2%. Machines such as 125S–200S and M350-3S typically run continuously, and this energy differential usually exceeds the price of the element itself. Running by resistance rather than calendar-based overrun is therefore not economical.
3. Dimensions and Installation Parameters
| Parameter | Value / Notes |
|---|---|
| Dimensions | Approx. 380 mm OD, approx. 178 mm overall height (verify against old part before ordering) |
| Effective Filtration Area | Depends on pleat count and pleat depth; verify by measuring the old element |
| Pleat Count / Pitch | Varies by production batch and media configuration; verify by physical count of old element |
| Installation Interface | Cylindrical insert type; positioned by end cap compression inside the intake filter assembly |
| Sealing Type | Face or radial seal; sealing body either integrally molded with end cap or separately installed |
Measurement checklist (recommended before ordering replacement parts, to verify supply)
| Measurement | Notes |
|---|---|
| Outer Diameter | Outer edge diameter of filter media |
| Inner Diameter | Center passage diameter |
| Overall Height | Total height including end caps |
| Seal Face Position and Type | Face / radial, and cross-sectional shape of seal |
| Installation Interface | Clamp, bolt hole or quick-fit structure type and dimensions |
Outer diameter, overall height and seal type directly determine fit and whether bypass occurs. Dimensions on this page are for preliminary comparison; the old element measurement is final.
4. Material Construction
| Component | Material | Notes |
|---|---|---|
| Filter Media | Wood pulp fiber filter paper (cellulose media), pleated structure | Depth filtration; captures particles progressively through fiber layers |
| Media Weight | Approx. 130 g/m² | Weight determines burst strength and dust holding space |
| Inner/Outer Support | Galvanized steel perforated frame | Dual-side support prevents media collapse under negative pressure |
| End Caps | Metal or polyurethane end caps | Bonded to media; also serves as seal carrier |
| Seal | Polyurethane or NBR sealing body | Ensures no bypass between element and assembly |
| Adhesive Layer | Polyurethane adhesive | Fixes and seals media to end caps and frame |
5. Operating Condition Tolerance
| Parameter | Value / Notes |
|---|---|
| Operating Temperature | -10 °C to +80 °C |
| Relative Humidity | ≤90% RH (non-condensing) |
| Burst / Collapse Pressure | Standard design withstands ≥5 kPa differential across media without deformation |
| Special Function | Intake-stage filtration for high-power machines; pre-filter layer can be added in high-dust environments to extend primary element life |
Machines running long-term in high-humidity, high-dust or oil-mist environments (textile, foundry, food, cement sites) will see media strength drop after moisture absorption, and oil mist causes surface mud buildup. Both conditions significantly shorten actual service life and require shorter inspection intervals.
6. Service Life and Maintenance Parameters
| Parameter | Value / Notes |
|---|---|
| Service Life | 2000 hours or 3 months (whichever comes first) |
| High-Dust Environment | Hours reduced accordingly (e.g. approx. 1500 hours); calendar limit also shortened |
| Shelf Life | Use within 24 months; store in dry, ventilated, dark location; avoid moisture and compression deformation |
| Replacement Criteria | Machine intake differential pressure gauge reading exceeds limit, or media shows damage, debonding, or compressed seal face |
Both "2000 hours or 3 months" apply simultaneously, whichever comes first. The calendar limit exists because media absorbs moisture and ages over time; even if operating hours are not reached, machines with long shutdowns or intermittent operation still require periodic replacement.
7. Applicable Standards
| Standard | Notes |
|---|---|
| ISO 5011 | Intake filter efficiency and dust holding capacity test method; basis for performance characterization of this type of air filter element |
| GB/T 14295 | National air filter standard; commonly referenced in domestic procurement and acceptance |
| ISO 8573-1 | Compressed air quality classes; used to describe machine supply air grade |
| Note | ISO 2941 / 2942 / 2943 / 3723 / 3724 series commonly seen in replacement-part documentation are hydraulic filter standards, and ISO 16889 multi-pass method also applies to liquid filtration. Neither applies to air filter elements and should not be used as performance basis for air filters. |
Standard Maintenance and Installation Steps
Step 1: Confirm machine status and spare parts. Verify machine nameplate model and power, confirm the ordered element matches the old part number. Prepare new element, clean cloth and necessary tools.
Step 2: Shut down, depressurize, disconnect power. Follow shutdown procedure, wait for complete depressurization. Disconnect main power and apply lockout/tagout. This is a mandatory step and cannot be omitted.
Step 3: Verify old part before starting work. Before opening the intake filter assembly, read the stamped part number on the old element's end cap and its installation position, confirm it matches the ordered part, then proceed with removal. Machines in the same power band may have multiple intake configurations; this step is critical for error prevention.
Step 4: Remove old element and assess. Remove the old element vertically and observe dust distribution and media condition. Criteria: if media shows damage, perforation, end cap debonding or compressed seal face, replace immediately even if the service interval has not been reached. If the outer surface has black oil sludge, intake oil mist is abnormal and upstream environment should be checked.
Step 5: Clean assembly interior. Wipe the assembly inner walls and bottom with a lint-free cloth. Do not blow compressed air forcefully into the assembly interior, as this drives dust into the intake passage. Criteria: inner walls free of loose dust, seal face flat and free of debris.
Step 6: Install new element. Install the new element in the same orientation and position as the old one, paying attention to seal face direction and compression method. Criteria: element sits without movement, seal face uniformly compressed around circumference.
Step 7: Reassemble and confirm seal. Reinstall cover plate or clamp, tighten evenly per machine requirements. Check that the intake vacuum gauge pressure line is clear — a blocked pressure line gives a "false clean" reading and is a common source of misjudgment.
Step 8: Test run and record. Reset the maintenance timer, start the machine at no load, observe intake vacuum gauge reading and operating sound. Criteria: vacuum gauge stable within machine allowable range, no abnormal whistling (whistling often indicates seal bypass). Record the operating hours at this replacement as the starting point for the next interval.
Frequently Asked Questions
Q1: Are 47701891001 and 39903281 the same part?
Yes. 39903281 is the previous original part number corresponding to this number. Ingersoll Rand switched a batch of M-series air filters from old numbers to new 11-digit numbers; 39903281 corresponds to the new number 47701891001. Old drawings and spare-parts lists show 39903281; both can be considered two numbers for the same element. If the old part is stamped 39903281, you can order directly by this part number.
Q2: Can 47701890001 and 47701891001 be interchanged?
No. Both belong to this number-change batch and share the same name — both are air filter elements — but they correspond to different intake configurations. Verify separately by the stamped part number on the old part itself; do not order based on name similarity. If the old part number is unclear, provide end cap photos and machine nameplate, and we will cross-reference by part number.
Q3: How many elements per machine?
Determined by the machine's intake assembly configuration: 125S–200S series uses 2 pcs per machine; MM90–110 uses 1 pc per machine. Different production batches of the same model may also differ. Order quantity should be based on that machine's parts diagram or physical count to avoid shortages from assuming "one per machine."
Q4: What is the replacement interval?
Standard interval is 2000 hours or 3 months, whichever comes first. In high-dust environments (cement, quarry, mining, metalworking), reduce hours to approximately 1500. The final criterion is the machine intake differential pressure gauge reading; replace when reading exceeds limit, regardless of operating hours.
Q5: Why are dimensions given as approximate values?
External dimensions vary slightly by production batch and media configuration, and machines in the same power band may have multiple intake assembly configurations. This page gives approx. 380 mm OD and approx. 178 mm overall height for preliminary comparison. Before formal procurement, measure the old element's OD, ID, overall height and seal type, or provide old part photos and machine nameplate for cross-reference by part number.
Q6: What are the consequences of increased intake resistance?
First, energy consumption rises: each 1 kPa increase in intake resistance raises the compression ratio by approximately 1%, increasing machine energy consumption by approximately 1%. Second, intake volume drops, reducing machine discharge. Continuing to use past the replacement threshold saves less on element cost than the extra electricity consumed. The higher the machine power, the more pronounced this difference.
Q7: Can aftermarket replacements be used?
Yes, but three items must be verified: filtration rating, end cap seal type, and dimensions. If an aftermarket part's seal type does not match the original structure, bypass occurs, allowing unfiltered air to enter the airend directly and accelerating rotor and bearing wear. When purchasing aftermarket parts, provide old part photos and this part number.
Q8: What if abnormal whistling occurs after installation?
Whistling typically indicates seal bypass: element not fully seated, seal face deformed, or seal missing. Stop the machine immediately and recheck: element seating, seal face compression or inversion. Also check whether the intake vacuum gauge pressure line is blocked to avoid misjudgment.
Q9: How to replace on machines with two-stage intake?
If the machine intake assembly is two-stage (primary + safety filter), the two stages use different part numbers and positions and are not interchangeable. Replace in "outer first, inner second" order, and verify each stage against the ordered part number separately. The safety filter serves as backup if the primary filter fails and should not be left unchanged long-term because it "looks clean."
Q10: Spare part storage requirements?
Store in a dry, ventilated, dark location; avoid moisture, rain and heavy compression. Media strength decreases with moisture absorption, and compression deformation damages the seal fit. Use within 24 months.
Q11: How to confirm the installed element is correct?
Check two points after installation: (1) intake differential pressure gauge reading should drop and stabilize in the low range; (2) no abnormal whistling and no drop in discharge volume. If reading is high or whistling occurs, there is a seal or installation problem — stop the machine immediately and recheck.
Compatible Machine Models
This element is suitable for Ingersoll Rand screw air compressors in the 90–160 kW power band, which belongs to the VPeX platform within the Ingersoll Rand product system.
| Item | Detail |
|---|---|
| Machine Type | Screw air compressor (oil-lubricated) |
| Platform | VPeX platform (90–160 kW band) |
| Applicable Power Band | 90–160 kW |
| Typical Models | M350-3S, 125S / 150S / 175S / 200S, ML/MM/MH 90–160, MM90–110, M90 / M110 |
| Quantity per Machine | 125S–200S series: 2 pcs per machine; MM90–110: 1 pc per machine |
| Power Band Confirmation | Compare machine nameplate model and power, and verify against old part number |
| Typical Applications | Manufacturing, textile, chemical, building materials, pneumatic conveying and other continuous air demand applications |
Cross-platform comparison at the same power band (to prevent mis-purchase; the following are part numbers for other platforms and are not interchangeable with this part)
| Platform | Power Band | Air Filter Part Number | Notes |
|---|---|---|---|
| ML/MM/MH/MU 90–160 | 90–160 kW | 39903291 | Same 90–160 kW but a different intake platform |
| M250 / ML250 | Approx. 40 m³/min | 39903265 / 42852129 | Larger machine platform; not interchangeable with this part |
| ML/MM/MH/MU 55–75 | 55–75 kW | 39708466 | Lower power platform; different part number |
| NG R-Series 90–160 kW | 90–160 kW | Order per model | Next-generation R-series platform; air filter part numbers correspond to that platform |
Why part-number verification is essential rather than model-based selection
Ingersoll Rand machines in the same power band have multiple intake filtration configurations: different platforms, different production batches, and whether a pre-filter layer is fitted all change the intake assembly interface and element dimensions. In addition, the same machine may use two elements with different part numbers simultaneously (see FAQ Q9). Therefore, selection should be based first on the old part's stamped number, second on the machine nameplate, and third on the installation position.
Three-Step Verification Method
- Read the stamped part number on the old element's end cap or frame and compare with the ordered number (the old number and this number are the same part; see Section 2 for the correspondence);
- Read the machine nameplate model and power, confirm it falls within the 90–160 kW band;
- Confirm the old part's installation position (single-stage / two-stage, primary / safety filter) and quantity per machine.
If these three steps still cannot confirm, provide machine nameplate photos, old part photos (including stamped part number) and installation position description, and we will cross-reference by part number for final confirmation.
Related Components
In the intake and lubrication system where this element is installed, components maintained on the same cycle include:
| Component | Part Number | Function | Inspection Points |
|---|---|---|---|
| Air Filter Element (same batch) | 47701890001 | Same name, different part number; another intake filter element for a different configuration in the same series | Verify separately by part number; not interchangeable |
| Air Filter Assembly (housing) | — | Housing assembly that holds and secures the intake element | Check clamps, seal faces and outlet end for deformation or corrosion |
| Safety Filter Element (two-stage intake) | — | Backup if primary filter fails, preventing unfiltered air from entering the airend | Inspect together with primary filter; do not leave unchanged long-term just because it looks clean |
| Intake Differential Pressure Gauge / Vacuum Gauge | — | Displays intake resistance; final criterion for replacement interval | Regularly check pressure line for blockage; blockage gives a "false clean" reading |
| Seals | — | Ensure no bypass between element and assembly | Inspect together with element; replace if compressed, hardened or missing |
| Oil Filter Element | — | Filters wear debris and sludge from lubricant, protecting rotors and bearings | Inspect together with air filter; replace per machine manual interval |
| Oil/Air Separator Element | — | Separates oil mist from compressed air and returns oil, controlling discharge oil content | Check oil return line for blockage when replacing |
| Lubricant (Ultra Coolant) | 38459582 | Standard Ingersoll Rand screw compressor coolant; provides lubrication and sealing | Test oil per machine requirements; avoid mixing with other brands |
Recommended bundled replacement: Air filter, oil filter element and oil/air separator element share the 2000-hour interval. Replacing them together avoids maintenance interval misalignment from single-part replacement. In high-dust sites, adding a high-dust pre-filter layer is recommended — pre-filter cost is far lower than the primary element and replacement is faster.
For specific part numbers: Items marked "—" above should be referenced from that machine's accompanying parts manual. The 90–160 kW band has different configurations by model, and matching part numbers must correspond to the specific machine model; do not apply across power bands.