Ingersoll Rand 47701891001 Air Filter Element | Replaces 39903281 | 380 mm 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 performance, and service life — they are directly interchangeable.
Please order using the new number 47701891001.

Product Information

Specifications

Dimension Note: OD, ID, and height are measured reference values. OEM tolerance ±2 mm; some batches are marked 180 mm height. Verify against the original 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 full compressor serial number and we will verify for you.

Pricing & 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This part number has been officially superseded by 47701891001.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 performance, and service life, and are directly interchangeable without any installation modifications.

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.

OD ≈ 380 mm, ID ≈ 199 mm, height ≈ 178 mm, net weight ≈ 1.75 kg per element. One element per compressor. Recommended replacement: 2,000 hours or 1 year, whichever comes first.

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

• Inlet 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 found.

Do Not Clean and Reuse

Dry pleated elements must not 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 traces are on the clean side, the seal has failed; address before installing the new element.
5. Wipe the sealing surface, insert the new element (ID ≈199 mm aligned with intake), and avoid over-tightening.
6. Reinstall the housing cover and confirm the restriction indicator returns to the clean position.
7. Restart the unit and verify inlet restriction returns 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 install following the steps above.

Frequently Asked Questions

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. Both share identical mounting dimensions, filtration performance, and service life, and are directly interchangeable.

Q3. What are the dimensions of 39903281?
OD approximately 380 mm, ID approximately 199 mm, height approximately 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 above 5 μm.

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

Q6. Which compressors does 39903281 fit?
It 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.

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

Q9. How many air filters per compressor?
1.

Q10. How do I know when the air filter needs replacement?
The inlet 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 exactly?
Provide the full compressor serial number and we can perform a precise match verification.

Inquiry

Bulk procurement, export documentation, and global shipping are all supported.

For a fast and accurate quote, please provide:

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

We will respond during business hours.