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

Part Number Upgrade Notice
47701891001 is Ingersoll Rand's official upgrade number for the legacy 39903281 air filter element.
Installation dimensions, filtration rating, and service life are identical — the two parts are fully interchangeable.
Please order using the new number 47701891001.

Product Information

Specifications

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

Compatible Ingersoll Rand Models

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

M Series — SSR M Series Oil-Injected Screw Compressors

RM Series — RM Series Screw Compressors (185 kW)

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

Need a 100% accurate match?
Provide the compressor's full machine serial number and we will verify compatibility for you.

Pricing & Lead Time

Bulk pricing available. Worldwide shipping.

Product Overview

The 39903281 is the 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This part number has been officially superseded by 47701891001. Installation dimensions, filtration rating, and service life are identical — the two parts are directly interchangeable with no modification to the mounting structure required.

The element uses imported wood-pulp filter paper / fiberglass 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 airend rotors without driving up energy consumption through excessive pressure drop.

OD ≈ 380 mm, ID ≈ 199 mm, height ≈ 178 mm, net weight ≈ 1.75 kg. 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 once per month.

Signs That 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 decline with no other fault identified.

Do Not Clean and Reuse

Dry pleated elements must not be washed or blown out 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 release the filter housing cover;
3. Grip the end cap and remove the old element;
4. Inspect the housing interior — if dust traces are present on the clean side, the seal has failed and must be addressed before installing the new element;
5. Wipe the sealing surface, install the new element (ID ≈199 mm aligned with the 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 confirm inlet restriction has returned to normal.

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

FAQ

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

Q2. Are 39903281 and 47701891001 interchangeable?
Yes. Installation dimensions, filtration rating, and service life are identical, so they are directly interchangeable.

Q3. What are the dimensions of 39903281?
OD approximately 380 mm, ID approximately 199 mm, height approximately 178 mm (including upper and lower 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 filter media does 39903281 use?
Imported wood-pulp filter paper / fiberglass composite media. The OEM uses Ahlstrom-grade media for 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-speed 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?
One.

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 out with air — cleaning damages the pleat structure and reduces filtration efficiency.

Q12. How can I confirm compatibility with my machine?
Provide the compressor's full machine serial number and we can perform a precise compatibility check for you.

Request a Quote

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

For a fast and accurate quote, please provide:

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

We respond within business hours.