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

Product Information

Specifications

Dimension Note: OD, ID, and height are reference measurements. Factory tolerance is ±2 mm; some batches are marked 180 mm height. 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 industrial-grade oil-injected screw compressors in the medium-to-high power range.

Need a 100% precise match?
Provide the complete machine serial number and we can verify compatibility for you.

Pricing & Lead Time

Bulk inquiries welcome. Worldwide shipping available.

Product Overview

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This part number has been officially superseded by 47701891001.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

The element uses imported wood pulp filter paper / glass fiber composite media (Ahlstrom-class), 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 trapping dust to protect the main rotor while avoiding excessive pressure drop that drives up energy consumption.

OD ≈ 380 mm, ID ≈ 199 mm, height ≈ 178 mm, net weight ≈ 1.75 kg per element. Each compressor uses 1 element. 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 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 decline 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 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 (ID ≈199 mm aligned with the intake port), and avoid over-tightening;
6. Refit 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 — install directly following the steps above.

FAQ

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

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

Q3. What are the dimensions of 39903281?
OD approximately 380 mm, ID approximately 199 mm, height approximately 178 mm (including top and bottom 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 / glass fiber composite media. OEM-grade Ahlstrom-class media with high dust holding capacity and low flow resistance.

Q6. Which compressors does 39903281 fit?
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 frequency. 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 must not 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 machine serial number and we can perform a precise compatibility check.

Request a Quote

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

For a fast and accurate quote, please provide:

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

We will respond during business hours.