Product
39903281 Air Filter Element New Part No. 47701891001 | Outer Diameter 380mm Fits S90-S150/M185/RM185
39903281 Ingersoll Rand air filter element, official upgrade part number 47701891001, directly interchangeable. Outer diameter ≈380mm, height ≈178mm, filtration accuracy 5~10μm. Fits SSR S series S90/S110/S150, M series M185, RM series RM185i/RM185n. The manufacturer recommends replacement every 2000 hours or 1 year.
- Export packaging & documentation support
- OEM / ODM customization available
- Sample and bulk order workflow
⚠️ Part Number Upgrade Notice
47701891001 is Ingersoll Rand's official upgrade number for the older 39903281.
The two have identical installation dimensions, filtration accuracy, and service life, and are directly interchangeable.
Please use the new number 47701891001 when placing orders.
I. 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 | Piece (EA) |
| Quantity per Machine | 1 piece |
| Recommended Replacement Interval | 2000 hours or 1 year, whichever comes first |
II. Specifications
| Parameter | Value | Description |
|---|---|---|
| Outer Diameter | ≈ 380 mm | Maximum outer diameter of the filter element body, OEM manufacturing tolerance ±2 mm |
| Inner Diameter | ≈ 199 mm | Center mounting bore diameter, matching the air compressor intake port specification |
| Height | ≈ 178 mm | Total height including upper and lower polyurethane end caps; some batches are labeled as 180 mm |
| Filtration Accuracy | 5 ~ 10 μm | Ingersoll Rand OEM standard, filtration efficiency for particles above 5μm ≥ 98% |
| Filter Media | Imported wood pulp filter paper / fiberglass composite filter media | OEM uses Ahlstrom-grade filter media, high dust holding capacity, low flow resistance |
| Weight | ≈ 1.75 kg | Net weight of a single filter element, slight variation between production batches |
| Part Type | Air Filter Element | Dry pleated filter cartridge |
| Quantity per Machine | 1 piece | — |
| Recommended Replacement Interval | 2000 hours or 1 year | Whichever comes first |
| Old/New Number Interchangeability | Fully interchangeable | Identical installation dimensions, filtration accuracy, and service life |
Dimension Note: Outer diameter, inner diameter, and height are all measured reference values. OEM manufacturing tolerance ±2 mm,
some batches are labeled with a height of 180 mm. It is recommended to verify against the actual product before installation.
III. Compatible Ingersoll Rand Models
S Series — SSR S Series Oil-Flooded Rotary Screw Air Compressors (90~150kW)
| Model | Power Range |
|---|---|
| S90 | 90 kW |
| S110 | 110 kW |
| S150 | 150 kW |
M Series — SSR M Series Oil-Flooded Rotary Screw Air Compressors
| Model | Power Range |
|---|---|
| M185 | 185 kW |
RM Series — RM Series Rotary Screw Air Compressors (185kW)
| Model | Description |
|---|---|
| RM185i | 185 kW, i = fixed speed model |
| RM185n | 185 kW, n = variable frequency model |
Compatible with 6 models in total: S90, S110, S150, M185, RM185i, RM185n
All of the above are classic Ingersoll Rand industrial-grade oil-flooded rotary screw air compressors, belonging to medium-to-high power units.
Need 100% accurate matching?
Provide the air compressor's complete machine serial number, and we can verify it further for you.
IV. Price and Lead Time
| Item | Old Number 39903281 | New Number 47701891001 |
|---|---|---|
| Status | Upgraded and replaced | Currently on sale |
| Reference Price | ¥1,069 | ¥1,240 |
| Quoted Price | ¥1,450 | ¥1,419 |
| Lead Time | — | 45 days |
| Unit | Piece | Piece |
Bulk inquiries supported, global shipping available.
V. Product Overview
39903281 is the air filter element used in Ingersoll Rand SSR S Series, M Series, and RM Series screw air compressors.
This part number has been officially superseded by 47701891001. The two share identical installation dimensions, filtration accuracy, and service life,
and are directly interchangeable with no modification to any mounting structure.
The filter element uses imported wood pulp filter paper / fiberglass composite filter media (Ahlstrom grade),
with filtration accuracy of 5 ~ 10 μm and filtration efficiency of ≥ 98% for particles above 5 μm,
combining high dust-holding capacity with low flow resistance—it effectively intercepts dust to protect the main rotor while not driving up energy consumption due to excessive resistance.
Outer diameter ≈ 380 mm, inner diameter ≈ 199 mm, height ≈ 178 mm, net weight per unit ≈ 1.75 kg.
Each air compressor is fitted with 1 element; replacement is recommended at 2000 hours or 1 year, whichever comes first.
VI. Installation and Maintenance
Replacement Interval
The manufacturer recommends 2000 hours or 1 year, whichever comes first.
If operating in dusty environments (dusty workshops, construction sites), the inspection interval should be shortened to once per month.
Criteria Indicating Replacement Is Needed
- The intake resistance indicator enters the yellow zone and remains in the yellow zone after shutdown;
- Dust traces are visible on the clean side of the filter housing;
- Discharge volume continues to decline and other fault causes have been ruled out.
Not Washable or Reusable
Dry pleated filter elements must not be washed with water or blown with air—cleaning will damage the pleated structure and reduce filtration efficiency; please replace with a new element directly.
Installation Steps
- Shut down and apply lockout/tagout, wait for the enclosure to cool;
- Open the intake-side enclosure panel and loosen the filter housing cover;
- Grip the end cap and remove the old filter element;
- Inspect the inner wall of the housing—if dust traces are present on the clean side, the seal has failed and must be addressed before installing the new element;
- Wipe the sealing surface, install the new filter element (inner diameter ≈199 mm aligned with the intake port), and be careful not to over-tighten;
- Refit the housing cover and confirm the resistance indicator returns to the clean position;
- Restart the unit and confirm intake resistance has returned to normal.
Old and new part numbers are directly interchangeable: 47701891001 and 39903281 have identical installation dimensions,
no housing replacement or structural modification is required; simply install following the steps above.
VII. Frequently Asked Questions
Q1. What is the new part number for 39903281?
47701891001. It is Ingersoll Rand's official upgraded number for the older 39903281.
Q2. Are 39903281 and 47701891001 interchangeable?
Yes. The two share identical installation dimensions, filtration accuracy, and service life, and are directly interchangeable.
Q3. What are the dimensions of 39903281?
Outer diameter approximately 380 mm, inner diameter approximately 199 mm, height approximately 178 mm (including upper and lower polyurethane end caps).
Outer diameter manufacturing tolerance ±2 mm.
Q4. What is the filtration accuracy of 39903281?
5 ~ 10 μm, with filtration efficiency ≥ 98% for particles above 5 μm.
Q5. What filter media does 39903281 use?
Imported wood pulp filter paper / fiberglass composite filter media; the original uses Ahlstrom-grade filter media, with high dust-holding capacity and low flow resistance.
Q6. Which air compressors is 39903281 compatible with?
Compatible with 6 models: S90, S110, and S150 of the SSR S Series, M185 of the M Series,
and RM185i and RM185n of the RM Series.
Q7. What is the difference between RM185i and RM185n?
The i is the fixed-speed version and the n is the variable-frequency version; both use the same air filter.
Q8. How often should this air filter be replaced?
The manufacturer recommends 2000 hours or 1 year, whichever comes first. The interval should be shortened in dusty environments.
Q9. How many air filters does one air compressor need?
1.
Q10. How do I determine that the air filter needs replacement?
The intake resistance indicator turns yellow and remains in the yellow zone after shutdown.
Q11. Can 39903281 be cleaned and reused?
No. Dry pleated filter elements must not be washed with water or blown with air; cleaning will damage the pleated structure and reduce filtration efficiency.
Q12. How can I confirm it will definitely fit my machine?
Provide the complete machine serial number of your air compressor, and we can perform a precise fit verification for you.
VIII. Inquiry
Bulk purchasing, export customs clearance, and global shipping are all supported.
For a fast and accurate quotation, please provide:
- Air compressor model (e.g., S110, RM185n)
- Or the complete machine serial number (for 100% precise fit verification)
- Required quantity
We will respond during business hours.
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