Product
Ingersoll Rand 47701891001 Air Filter Element | Replaces 39903281 | 380mm OD for S90–S150, M185, RM185
Official upgrade air filter element for Ingersoll Rand compressors, replacing part 39903281 with full interchangeability. OD ≈380 mm, ID ≈199 mm, height ≈178 mm, 5–10 μm filtration at ≥98% efficiency. Fits SSR S90/S110/S150, M185, and RM185i/RM185n.
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Part number upgrade notice
47701891001 is the official Ingersoll Rand upgrade number for the older 39903281.
The two share identical mounting dimensions, filtration performance, and service life, and are fully interchangeable.
Please order using the new number 47701891001.
Product Information
| Item | Details |
|---|---|
| Old part number | 39903281 |
| New part number | 47701891001 (official upgrade number, directly interchangeable) |
| Part name | Air Filter Element |
| Brand | Ingersoll Rand |
| Unit | EA |
| Quantity per machine | 1 |
| Recommended replacement interval | 2,000 hours or 1 year, whichever comes first |
Specifications
| Parameter | Value | Notes |
|---|---|---|
| Outer diameter | ≈ 380 mm | Maximum OD of the filter body; OEM manufacturing tolerance ±2 mm |
| Inner diameter | ≈ 199 mm | Center mounting bore, matches compressor intake port |
| Height | ≈ 178 mm | Total height including upper and lower polyurethane end caps; some batches marked 180 mm |
| Filtration rating | 5–10 μm | OEM standard; ≥98% efficiency for particles above 5 μm |
| Filter media | Imported wood pulp paper / glass fiber composite | Ahlstrom-grade media; high dust holding capacity, low flow resistance |
| Weight | ≈ 1.75 kg | Net weight per element; slight variation between production batches |
| Part type | Air Filter Element | Dry pleated cartridge |
| Quantity per machine | 1 | — |
| Recommended replacement interval | 2,000 hours or 1 year | Whichever comes first |
| Old/new interchangeability | Fully interchangeable | Identical mounting dimensions, filtration performance, and service life |
Dimensional note: Outer diameter, inner diameter, and height are measured reference values. OEM manufacturing tolerance is ±2 mm; some batches are marked 180 mm in height. Verify against the physical part before installation.
Compatible Ingersoll Rand Models
S Series — SSR S Series oil-injected screw compressors (90–150 kW)
| Model | Power range |
|---|---|
| S90 | 90 kW |
| S110 | 110 kW |
| S150 | 150 kW |
M Series — SSR M Series oil-injected screw compressors
| Model | Power range |
|---|---|
| M185 | 185 kW |
RM Series — RM Series screw compressors (185 kW)
| Model | Notes |
|---|---|
| RM185i | 185 kW, i = fixed speed |
| RM185n | 185 kW, n = variable frequency |
Total compatible models: 6 — S90, S110, S150, M185, RM185i, RM185n.
All are classic Ingersoll Rand industrial oil-injected screw compressors in the medium-to-high power range.
Need a 100% accurate match?
Provide the compressor's full serial number and we can verify compatibility for you.
Pricing and Lead Time
| Item | Old number 39903281 | New number 47701891001 |
|---|---|---|
| Status | Superseded | Active |
| Reference price | ¥1,069 | ¥1,240 |
| Quoted price | ¥1,450 | ¥1,419 |
| Lead time | — | 45 days |
| Unit | EA | EA |
Volume inquiries welcome. Worldwide shipping available.
Product Overview
The 39903281 is an air filter element used in Ingersoll Rand SSR S Series, M Series, and RM Series screw compressors.
This part number has been officially superseded by 47701891001. The two share identical mounting dimensions, filtration performance, and service life, and are directly interchangeable without any modification to the installation structure.
The element uses imported wood pulp paper / glass fiber composite media (Ahlstrom-grade), with a filtration rating of 5–10 μm and ≥98% efficiency for particles above 5 μm. It combines high dust holding capacity with low flow resistance — effectively capturing dust to protect the rotor while avoiding excessive pressure drop that would increase energy consumption.
Outer diameter ≈380 mm, inner diameter ≈199 mm, height ≈178 mm, net weight ≈1.75 kg per element. One element is installed per compressor. Recommended replacement: 2,000 hours or 1 year, whichever comes first.
Installation and Maintenance
Replacement interval
OEM recommendation: 2,000 hours or 1 year, whichever comes first.
In dusty environments (dusty workshops, construction sites), shorten inspection intervals to monthly.
Signs replacement is needed
- Intake restriction indicator enters the yellow zone and remains there after shutdown;
- Dust traces visible on the clean side of the filter housing;
- Discharge volume continues to drop with no other fault cause identified.
Do not wash or reuse
Dry pleated elements must not be washed or blow-cleaned — cleaning damages the pleat structure and reduces filtration efficiency. Replace with a new element.
Installation steps
- Shut down and lock out/tag out; allow the enclosure to cool.
- Open the intake-side enclosure panel and release the filter housing cover.
- Grip the end cap and remove the old element.
- Inspect the housing interior — dust traces on the clean side indicate a seal failure, which must be corrected before installing the new element.
- Wipe the sealing surface, install the new element (align the ≈199 mm ID with the intake port), and avoid over-tightening.
- Reassemble the housing cover and confirm the restriction indicator returns to the clean position.
- Restart the unit and confirm intake restriction has returned to normal.
Old and new numbers are directly interchangeable: 47701891001 and 39903281 share the same mounting dimensions. No housing replacement or structural modification is required — simply follow the steps above.
FAQ
Q1. What is the new part number for 39903281?
47701891001. It is the official Ingersoll Rand upgrade number for the older 39903281.
Q2. Are 39903281 and 47701891001 interchangeable?
Yes. They share identical mounting dimensions, filtration performance, and service life, and can be used interchangeably.
Q3. What are the dimensions of 39903281?
Outer diameter ≈380 mm, inner diameter ≈199 mm, height ≈178 mm (including upper and lower polyurethane end caps). OD manufacturing tolerance is ±2 mm.
Q4. What is the filtration rating of 39903281?
5–10 μm, with ≥98% efficiency for particles above 5 μm.
Q5. What filter media does 39903281 use?
Imported wood pulp paper / glass fiber composite media, Ahlstrom-grade, with high dust holding capacity and low flow resistance.
Q6. Which compressors does 39903281 fit?
Six models: SSR S Series S90, S110, S150; M Series M185; and RM Series RM185i, RM185n.
Q7. What is the difference between RM185i and RM185n?
i is the fixed-speed version and n is the variable-frequency version; both use the same air filter.
Q8. How often should this air filter be replaced?
OEM recommendation is 2,000 hours or 1 year, whichever comes first. Shorten the interval in dusty environments.
Q9. How many air filters does one compressor require?
1.
Q10. How do I know when the air filter needs replacement?
The intake restriction indicator turns yellow and remains in the yellow zone after shutdown.
Q11. Can 39903281 be washed and reused?
No. Dry pleated elements cannot be washed or blow-cleaned; cleaning damages the pleat structure and reduces filtration efficiency.
Q12. How can I confirm compatibility with my machine?
Provide the compressor's full serial number and we can perform an accurate compatibility check.
Request a Quote
Volume purchasing, export documentation, and worldwide shipping are supported.
To receive a fast and accurate quotation, please provide:
- Compressor model (e.g., S110, RM185n)
- Or the full serial number (for 100% accurate compatibility verification)
- Required quantity
We respond within business hours.