Ingersoll Rand 47701891001 Air Filter Element | Replaces 39903281 | 380mm OD for S90-S150, M185, RM185

Part Number Upgrade Notice
47701891001 is the official Ingersoll Rand upgrade for the older 39903281.
Both share identical mounting dimensions, filtration performance, and service life — they are fully interchangeable.
Please order using the new number 47701891001.

1. Product Information

2. Specifications

Dimension Note: OD, ID, and height are measured reference values. OEM manufacturing tolerance ±2 mm; some batches are marked 180 mm height. Verify against the physical part before installation.

3. Compatible Ingersoll Rand Models

S Series — SSR S Series Oil-Flooded Rotary Screw Compressors (90–150 kW)

M Series — SSR M Series Oil-Flooded Rotary Screw Compressors

RM Series — RM Series Rotary Screw Compressors (185 kW)

Total 6 compatible models: S90, S110, S150, M185, RM185i, RM185n. All are classic Ingersoll Rand industrial oil-flooded rotary screw compressors in the medium-to-high power range.

Need 100% accurate fitment?
Provide the complete compressor serial number and we can verify for you.

4. Pricing & Lead Time

Bulk inquiries welcome. Worldwide shipping available.

5. Product Overview

The 39903281 is the air filter element used in Ingersoll Rand SSR S Series, M Series, and RM Series rotary screw compressors.

This part number has been officially superseded by 47701891001. Both share identical mounting dimensions, filtration performance, and service life, and are fully interchangeable without any installation modifications.

The element uses imported wood pulp paper / glass fiber composite media (Ahlstrom-class), with a filtration rating of 5 ~ 10 μm and ≥98% efficiency for particles larger than 5 μm. It combines high dust-holding capacity with low flow resistance — effectively trapping dust to protect the compressor rotor while avoiding excessive energy consumption from high pressure drop.

Outer diameter ≈ 380 mm, inner diameter ≈ 199 mm, height ≈ 178 mm, net weight ≈ 1.75 kg. One element per compressor. Recommended replacement every 2,000 hours or 1 year, whichever comes first.

6. Installation & 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 after ruling out other causes.

Do Not Clean and Reuse

Dry pleated elements cannot be washed or blown with air — cleaning damages the pleat structure and reduces filtration efficiency. Replace with a new element.

Installation Steps

1. Shut down and lock out/tag out; allow the enclosure to cool.
2. Open the intake-side enclosure panel and loosen the filter housing cover.
3. Grip the end cap and remove the old element.
4. Inspect the housing interior — if dust is present on the clean side, the seal has failed; address this before installing the new element.
5. Wipe the sealing surface, install the new element (ID ≈199 mm aligns with the intake), and avoid over-tightening.
6. Replace the housing cover and confirm the restriction indicator returns to the clean position.
7. Restart the unit and confirm intake restriction has returned to normal.

Old and new numbers are directly interchangeable: 47701891001 and 39903281 share identical mounting dimensions. No housing change or structural modification is required — simply follow the steps above.

7. Frequently Asked Questions

Q1. What is the new part number for 39903281?
47701891001. It is the official Ingersoll Rand upgrade for the older 39903281.

Q2. Are 39903281 and 47701891001 interchangeable?
Yes. They share identical mounting dimensions, filtration performance, and service life, and are fully interchangeable.

Q3. What are the dimensions of 39903281?
Outer diameter ≈380 mm, inner diameter ≈199 mm, height ≈178 mm (including polyurethane end caps). OD manufacturing tolerance ±2 mm.

Q4. What is the filtration rating of 39903281?
5 ~ 10 μm, with ≥98% efficiency for particles larger than 5 μm.

Q5. What filter media does 39903281 use?
Imported wood pulp paper / glass fiber composite media; OEM-grade Ahlstrom-class media with high dust holding and low flow resistance.

Q6. Which compressors does 39903281 fit?
Six models: SSR S Series S90, S110, S150; M Series M185; RM Series RM185i, RM185n.

Q7. What is the difference between RM185i and RM185n?
i = fixed speed, n = variable speed; both use the same air filter.

Q8. How often should this air filter be replaced?
OEM recommendation: 2,000 hours or 1 year, whichever comes first. Shorten the interval in dusty environments.

Q9. How many air filters does one compressor need?
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 cleaned and reused?
No. Dry pleated elements cannot be washed or blown with air; cleaning damages the pleat structure and reduces filtration efficiency.

Q12. How can I confirm it fits my machine?
Provide the complete compressor serial number and we can perform an accurate fitment check for you.

8. Request a Quote

Bulk procurement, export documentation, and worldwide shipping are available.

To provide a fast and accurate quotation, please include:

• Compressor model (e.g., S110, RM185n)
• Or complete compressor serial number (for 100% fitment verification)
• Required quantity

We respond during business hours.