Product
Ingersoll Rand 47701891001 Air Filter Element | Replaces 39903281 | 90–160 kW OEM
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. OEM/ODM supply with export packing and full part-number traceability.
- Export packaging & documentation support
- OEM / ODM customization available
- Sample and bulk order workflow
Product Overview
47701891001 is the intake air filter element for Ingersoll Rand oil-lubricated screw compressors. Its previous factory part number is 39903281 — the two numbers refer to the same element, and older drawings or spare-parts lists often carry the 39903281 marking.
The element sits inside the external intake filter assembly, upstream of the airend inlet, and forms the first filtration stage on the air path. As the compressor draws in ambient air, dust, sand, fibres and airborne debris enter with it; the filter media stops these contaminants before they reach the screw rotors. Once the element fails, unfiltered air passes directly into the airend 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 range, typically M350-3S, 125S/150S/175S/200S, and ML/MM/MH 90–160, MM90–110, M90/M110 platforms. In Ingersoll Rand's product structure this power band belongs to the VPeX platform. Same-power machines on other platforms — such as the NG R-Series 90–160 kW or the larger M250 — use different air filter part numbers and are not interchangeable (see cross-platform table below).
Core Specifications
| Item | Value |
|---|---|
| Part number | 47701891001 |
| Previous factory PN | 39903281 |
| Product name | Air Filter Element |
| Brand | Ingersoll Rand |
| Applicable power range | 90–160 kW |
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% for particles ≥5 μm |
| Dimensions | Approx. 380 mm OD × 178 mm overall height |
| Recommended replacement interval | 2,000 hours or 3 months |
Basic Parameters
| Parameter | Detail |
|---|---|
| Part number | 47701891001 |
| Previous factory 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 the external intake filter assembly, upstream of the airend inlet |
| Quantity per machine | 2 pcs for 125S–200S series; 1 pc for MM90–110 |
| Replacement interval | 2,000 hours or 3 months |
How to Confirm Fitment
Ingersoll Rand machines in the same power band may use several different intake filter configurations, and similar part numbers are not interchangeable. Before ordering, check three points: (1) the part number stamped on the old element's end cap or cage — if it reads 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 two-stage intake systems the primary and safety filters differ in position and part number.
Note that 47701890001 shares the same product name and is also an air filter element, but it corresponds to a different intake configuration. Verify by part number, not by name similarity.
Technical Specifications
1. Filtration Performance
| Parameter | Value / Note |
|---|---|
| Filtration rating | 5–10 μm |
| Filtration efficiency | ≥98% for particles ≥5 μm |
| Filter class | Characterised per ISO 5011 by efficiency, restriction and dust-holding capacity; HVAC classes such as G4/F7 do not apply |
| Dust-holding capacity | Directly related to site dust concentration; no universal nominal value — use intake differential pressure gauge readings as the criterion |
Filtration rating and efficiency should be read as a pair. A filter with high rating but low dust-holding capacity will see restriction rise quickly and require frequent replacement, driving up total cost of ownership. The target here is to maintain sufficient dust-holding space at 5–10 μm rating for continuously running 90–160 kW machines.
2. Flow and Restriction
| Parameter | Value / Note |
|---|---|
| Rated air flow | Must be no lower than the machine's rated intake volume; 90–160 kW machines typically draw around 15–27 m³/min, based on discharge volume with corrections for intake temperature and altitude |
| Initial pressure drop | Approx. 0.3–0.5 kPa with a clean new element |
| Operating differential range | Rises gradually with dust loading; typical operating range approx. 0.5–1.5 kPa |
| Alarm / final restriction | Typical replacement threshold approx. 1.5–2.5 kPa; the machine's intake vacuum or differential pressure gauge is the final criterion |
| Pressure drop vs. energy | Each 1 kPa increase in intake restriction raises the compression ratio by approx. 1%, increasing machine energy consumption by approx. 1.0% |
Pressure drop vs. energy detail (theoretical, at 0.85 MPa discharge gauge pressure)
| Intake restriction | 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 the replacement threshold, intake restriction rises by more than 2 kPa, and machine energy consumption increases by roughly 2% in step. Machines such as the 125S–200S and M350-3S usually run continuously, so this energy difference typically exceeds the price of the element itself — running past the restriction limit rather than replacing on condition is not economical.
3. Dimensions and Installation
| Parameter | Value / Note |
|---|---|
| Dimensions | Approx. 380 mm OD × 178 mm overall height (verify against the old part before ordering) |
| Effective filtration area | Depends on pleat count and depth; confirm by measuring the old element |
| Pleat count / spacing | Varies with production batch and media configuration; count on the old part |
| Mounting interface | Cylindrical push-in type, secured by the end cap when fitted into the intake filter assembly |
| Sealing | Face or radial seal; seal body moulded with the end cap or fitted separately |
Measurement checklist (recommended before ordering replacement parts)
| Measurement | Note |
|---|---|
| Outer diameter | Outer edge of the filter media |
| Inner diameter | Centre passage diameter |
| Overall height | Including end caps |
| Seal face position and type | Face or radial, and seal cross-section |
| Mounting interface | Clamp, bolt holes or quick-fit structure and dimensions |
Outer diameter, overall height and seal type directly determine whether the element fits and whether bypass occurs. The dimensions on this page are for preliminary comparison; the old part measurement is final.
4. Material Construction
| Component | Material | Note |
|---|---|---|
| Filter media | Wood-pulp fibre filter paper (cellulose media), pleated | Depth filtration; captures particles progressively through the fibre layers |
| Media grammage | Approx. 130 g/m² | Determines burst strength and dust-holding space |
| Inner and outer cages | Galvanised steel perforated cages | Double-sided support prevents media collapse under negative pressure |
| End caps | Metal or polyurethane end caps | Bonded to the media and act as the seal carrier |
| Seal | Polyurethane or nitrile rubber seal body | Prevents bypass between element and assembly |
| Bonding | Polyurethane adhesive | Fixes and seals media to end caps and cages |
5. Operating Tolerance
| Parameter | Value / Note |
|---|---|
| Operating temperature | -10 °C to +80 °C |
| Relative humidity | ≤90% RH (non-condensing) |
| Burst / collapse pressure | Standard design withstands at least 5 kPa differential across the media without deformation |
| Special function | Intake filtration for high-power machines; a pre-filter layer can be added in heavy-dust sites to extend main element life |
Machines running long-term in high humidity, heavy dust or oil-mist environments (textiles, foundries, food, cement) will see media strength drop after moisture absorption, and oil mist can cause mud-like deposits on the media surface. Both conditions significantly shorten actual service life and require shorter inspection intervals.
6. Service Life and Maintenance
| Parameter | Value / Note |
|---|---|
| Service life | 2,000 hours or 3 months, whichever comes first |
| High-dust environment | Reduce hours accordingly (e.g. approx. 1,500 hours) and bring the calendar limit forward |
| Storage shelf life | Use within 24 months; store dry, ventilated and out of direct light, avoiding moisture and compression deformation |
| Replacement criteria | Intake differential pressure gauge over limit, or media damage, debonding, or compressed seal face |
Both limits — 2,000 hours and 3 months — apply, whichever comes first. The calendar limit exists because media absorbs moisture and ages over time; even if running hours are not reached, machines that sit idle or run intermittently still need periodic replacement.
7. Applicable Standards
| Standard | Note |
|---|---|
| ISO 5011 | Test method for intake filter efficiency and dust-holding capacity; the basis for performance characterisation of this type of air filter element |
| GB/T 14295 | National air filter standard, often cited for domestic procurement and acceptance |
| ISO 8573-1 | Compressed air quality classes, used to describe the machine's overall air supply quality |
| Note | The ISO 2941 / 2942 / 2943 / 3723 / 3724 series commonly cited in replacement-part literature are hydraulic filter standards, and ISO 16889 multi-pass testing also applies to liquid filtration; neither applies to air filter elements and should not be used as performance evidence for air filters. |
Standard Maintenance and Installation Steps
Step 1 — Confirm machine status and spare part. Check the machine nameplate model and power rating, and confirm the new element matches the old part number. Prepare the new element, lint-free cloth and necessary tools.
Step 2 — Shut down, depressurise, isolate power. Follow the shutdown procedure and wait until the machine is fully depressurised. Isolate the main power supply and apply lockout/tagout. This step is mandatory.
Step 3 — Verify the old part before dismantling. Before opening the intake filter assembly, read the part number stamped on the old element's end cap and note its installation position. Same-power machines use several intake configurations, so this is the key error-prevention step.
Step 4 — Remove and assess the old element. Lift the old element out vertically and inspect dust distribution and media condition. Criteria: replace immediately if the media is torn, punctured, debonded at the end cap, or the seal face is compressed — even if the service interval has not been reached. A black oily deposit on the outer surface indicates abnormal oil mist in the intake; check the upstream environment.
Step 5 — Clean the assembly interior. Wipe the inner walls and base with a lint-free cloth. Do not blow compressed air into the assembly — this drives dust into the intake passage. Criteria: no loose dust on inner walls, seal face flat and free of debris.
Step 6 — Fit the new element. Insert in the same orientation and position as the old part, paying attention to seal face direction and clamping method. Criteria: no movement once seated, and even circumferential compression on the seal face.
Step 7 — Reassemble and confirm sealing. Refit the cover or clamp and tighten evenly per machine requirements. Check that the intake vacuum gauge impulse line is clear — a blocked line gives a false clean reading, a common source of misjudgement.
Step 8 — Test run and record. Reset the maintenance timer, start the machine unloaded, and observe the intake vacuum gauge reading and running sound. Criteria: gauge stable within the machine's permitted range, no abnormal whistling (whistling often indicates seal bypass). Record the running hours at 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 factory number for this part number. Ingersoll Rand migrated a batch of M-series air filters from old numbers to new 11-digit numbers, and 39903281 corresponds to 47701891001. Old drawings and spare-parts lists carry 39903281; the two can be treated as two numbers for the same element. If the old part is stamped 39903281, order directly against this part number.
Q2: Can 47701890001 and 47701891001 be interchanged?
No. Both belong to this renumbering batch and share the same product name, but they correspond to different intake configurations. Verify by the part number stamped on the old element, not by name similarity. If the old number is illegible, provide an end-cap photo and the machine nameplate and we will cross-reference by part number.
Q3: How many elements per machine?
This depends on the intake assembly configuration: 2 pcs for the 125S–200S series, 1 pc for MM90–110. Different production batches of the same model may also differ, so confirm quantity against the machine's parts drawing or a physical count — do not assume one per machine.
Q4: What is the replacement interval?
The standard interval is 2,000 hours or 3 months, whichever comes first. In high-dust environments (cement, quarrying, mining, metalworking) reduce the hours to approximately 1,500. The intake differential pressure gauge reading is the final criterion — replace when over limit regardless of running hours.
Q5: Why are dimensions given as approximate values?
Dimensions vary slightly with production batch and media configuration, and same-power machines use several intake assembly configurations. The approx. 380 mm OD and 178 mm height on this page are for preliminary comparison. Before formal procurement, measure the old element's OD, ID, overall height and seal type, or provide photos and the machine nameplate for part-number cross-reference.
Q6: What happens when intake restriction rises?
First, energy consumption rises — each 1 kPa increase in intake restriction raises the compression ratio by about 1% and machine energy use by about 1%. Second, intake volume drops, reducing discharge volume. Running past the replacement threshold saves less on the element than the extra electricity costs, and the difference grows with machine power.
Q7: Can alternative parts be used?
Yes, but verify three points: filtration rating, end-cap seal type, and dimensions. If an alternative's seal type does not match the original structure, bypass occurs and unfiltered air enters the airend, accelerating rotor and bearing wear. When sourcing alternatives, provide old-part photos and this part number.
Q8: What if abnormal whistling occurs after installation?
Whistling usually indicates seal bypass — the element is not fully seated, the seal face is deformed, or the seal is missing. Stop the machine immediately and check whether the element is seated and whether the seal face is compressed or rolled. Also check the intake vacuum gauge impulse line for blockage to avoid misdiagnosis.
Q9: How do I replace on a two-stage intake system?
If the intake assembly is two-stage (primary + safety), the two stages use different part numbers and positions and are not interchangeable. Replace outside-in, and verify each stage against the ordered part number. The safety element acts as a backstop if the primary fails and should not be left in service long-term just because it looks clean.
Q10: How should spare parts be stored?
Store dry, ventilated and out of direct light, protected from moisture, rain and heavy compression. Moisture reduces media strength, and compression deformation damages the seal fit. Use within 24 months.
Q11: How do I confirm the element is correctly installed?
Check two things after installation: the intake differential pressure gauge reading should fall and stabilise in the low range, and there should be no abnormal whistling or drop in discharge volume. If the reading is high or whistling occurs, sealing or installation is faulty — stop the machine and recheck.
Compatible Machine Models
This element fits Ingersoll Rand oil-lubricated screw compressors in the 90–160 kW range, which belongs to the VPeX platform in Ingersoll Rand's product structure.
| Item | Detail |
|---|---|
| Machine type | Screw air compressor (oil-lubricated) |
| Platform | VPeX platform (90–160 kW band) |
| Applicable power range | 90–160 kW |
| Typical models | M350-3S, 125S/150S/175S/200S, ML/MM/MH 90–160, MM90–110, M90/M110 |
| Quantity per machine | 2 pcs for 125S–200S series; 1 pc for MM90–110 |
| Power band confirmation | Check machine nameplate model and power, and confirm against the old part number |
| Typical applications | Manufacturing, textiles, chemicals, building materials, pneumatic conveying and other continuous-air applications |
Cross-platform reference for 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 range | Air filter part number | Note |
|---|---|---|---|
| ML/MM/MH/MU 90–160 | 90–160 kW | 39903291 | Same power band but a different intake platform |
| M250 / ML250 | Approx. 40 m³/min | 39903265 / 42852129 | Larger machine platform, not interchangeable |
| 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 by model | Next-generation R-Series platform with its own air filter part numbers |
Why part-number verification matters more than model selection
Ingersoll Rand machines in the same power band use several intake filter 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, a single machine may use two elements with different part numbers (see FAQ Q9). Selection should therefore be based first on the old part number, second on the machine nameplate, and third on installation position.
Three-Step Verification
- Read the part number stamped on the old element's end cap or cage and compare with the ordered part number (the old number and this part number refer to the same element — see Basic Parameters).
- Read the machine nameplate model and power rating and confirm it falls within the 90–160 kW band.
- Confirm the old element's installation position (single-stage or two-stage, primary or safety) and quantity per machine.
If these three steps do not confirm fitment, provide a machine nameplate photo, old-part photos showing the stamped part number, and installation position details; we will cross-reference by part number before confirming.
Related Components
Components sharing the same maintenance cycle in the intake and lubrication system:
| Component | Part number | Function | Inspection point |
|---|---|---|---|
| Air filter element (same batch) | 47701890001 | Same name, different part number — another intake filter for a different configuration in the same series | Verify separately against the ordered part number; not interchangeable |
| Air filter assembly (housing) | — | Housing assembly that holds and locates the intake filter element | Check clamps, seal faces and outlet end for deformation or corrosion |
| Safety element (on two-stage intake) | — | Backstop if the primary element fails, preventing unfiltered air entering the airend | Check together with the primary; do not leave in service long-term just because it looks clean |
| Intake differential pressure / vacuum gauge | — | Shows intake restriction; the final criterion for replacement interval | Check impulse line for blockage regularly; blockage gives a false clean reading |
| Seals | — | Prevent bypass between element and assembly | Inspect with the element; replace if compressed, hardened or missing |
| Oil filter element | — | Removes wear debris and sludge from lubricant, protecting rotors and bearings | Inspect with the air filter; replace per machine manual interval |
| Oil separator element | — | Separates oil mist from compressed air and returns oil, controlling discharge oil carryover | Check oil return line for blockage when replacing |
| Lubricant (Ultra Coolant) | 38459582 | Standard Ingersoll Rand screw compressor coolant, providing lubrication and sealing | Test oil per machine requirements; avoid mixing with other brands |
Recommended paired replacement: air filter, oil filter and oil separator share the 2,000-hour cycle and are best replaced together to avoid staggered maintenance intervals. In dusty sites, fit a high-dust pre-filter layer first — pre-filter cost is far lower than the main element and replacement is quicker.
For specific part numbers: items marked “—” above should be confirmed against the machine's parts manual. Configurations differ across the 90–160 kW band, and associated part numbers must match the specific machine model rather than being applied across power bands.