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 number for the older 39903281.
Both share identical mounting dimensions, filtration rating, and service life — they are directly interchangeable.
Please order using the new number 47701891001.

Product Information

Specifications

Dimension Note: Outer diameter, inner diameter, and height are measured reference values. OEM tolerance ±2 mm; some batches marked 180 mm height. Verify against actual part before installation.

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% exact match?
Provide the compressor's full serial number and we will verify for you.

Price & Lead Time

Bulk inquiries welcome. Global shipping available.

Product Overview

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This part number has been officially superseded by 47701891001.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 rating, and service life, and are directly interchangeable with no installation modifications required.

The element uses imported wood pulp filter paper / glass fiber composite media (Ahlstrom-grade), with a filtration rating of 5–10 μm and ≥98% efficiency for particles ≥5 μm. It combines high dust holding capacity with low flow resistance — effectively trapping dust to protect the compressor rotor without excessive pressure drop that could increase energy consumption.

Outer diameter ≈ 380 mm, inner diameter ≈ 199 mm, height ≈ 178 mm, net weight ≈ 1.75 kg per element. One element per compressor. Recommended replacement every 2000 hours or 1 year, whichever comes first.

Installation & Maintenance

Replacement Interval

OEM recommendation: 2000 hours or 1 year, whichever comes first.
In dusty environments (e.g., foundries, 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 steadily decreases with no other cause identified.

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 and must be addressed before installing a new element;
5. Wipe the sealing surface, insert the new element (inner diameter ≈199 mm aligns with intake), avoid over-tightening;
6. Reinstall the housing cover and confirm the restriction indicator returns to the clean position;
7. Restart the unit and verify intake restriction returns to normal.

Old and new numbers are directly interchangeable: 47701891001 and 39903281 share the same mounting dimensions. No housing change or structural modification needed — simply install following 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. Can 39903281 and 47701891001 be interchanged?
Yes. They have identical mounting dimensions, filtration rating, and service life, and are directly interchangeable.

Q3. What are the dimensions of 39903281?
Outer diameter approx. 380 mm, inner diameter approx. 199 mm, height approx. 178 mm (including top and bottom polyurethane end caps). Outer diameter tolerance ±2 mm.

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

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

Q6. Which compressors does 39903281 fit?
Fits 6 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 fixed speed, n is variable speed. Both use the same air filter element.

Q8. How often should this air filter be replaced?
OEM recommends every 2000 hours or 1 year, whichever comes first. Shorten in dusty environments.

Q9. How many air filters per compressor?
1 element.

Q10. How to tell if 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 fitment for my machine?
Provide the compressor's full serial number and we will perform a precise match verification.

Request a Quote

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

To provide an accurate quotation, please include:

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

We will respond during business hours.