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

Product Overview

Part 39903281 is the air filter element used on Ingersoll Rand SSR S, M, and RM series screw compressors. It has been officially superseded by 47701891001. Both part numbers share identical installation dimensions, filtration performance, and service life, allowing direct interchange without any modification to the housing or mounting structure.

The element uses imported wood pulp filter paper / glass fiber composite media (Ahlstrom grade), delivering 5–10 μm filtration and ≥98% efficiency for particles above 5 μm. It combines high dust-holding capacity with low flow resistance—effectively trapping contaminants to protect the compressor rotor while avoiding excessive pressure drop that would increase energy consumption.

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

Specifications

Compatible Ingersoll Rand Models

This air filter element fits the following 6 models:

• SSR S Series: S90 (90 kW), S110 (110 kW), S150 (150 kW)
• SSR M Series: M185 (185 kW)
• RM Series: RM185i (185 kW, fixed speed), RM185n (185 kW, variable speed)

All are classic industrial oil-injected screw compressors in the medium-to-high power range.

Installation & Maintenance

Replacement interval: 2,000 hours or 1 year, whichever comes first. In dusty environments (e.g., dust workshops, construction sites), inspect 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 continuously drops with no other cause.

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 panel and release 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 aligns with intake), and avoid over-tightening.
6. Reinstall the cover and confirm the restriction indicator returns to the clean position.
7. Restart the compressor and verify inlet restriction is normal.

Direct interchange: 47701891001 and 39903281 share identical installation dimensions. No housing replacement or structural modification is required; simply follow the steps above.

Pricing & Lead Time

Bulk inquiries welcome. Worldwide shipping available.

FAQ

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 installation dimensions, filtration performance, and service life, allowing direct interchange.

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

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

Q5. What filter media is used?
Imported wood pulp filter paper / glass fiber composite (Ahlstrom grade), offering high dust-holding capacity and low flow resistance.

Q6. Which compressors does it 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 it be replaced?
Every 2,000 hours or 1 year, whichever comes first. Shorten in dusty environments.

Q9. How many elements per compressor?
One.

Q10. How do I know when to replace?
When the inlet restriction indicator turns yellow and remains yellow 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 efficiency.

Q12. How can I confirm fitment?
Provide the full compressor serial number and we can perform a precise match verification.

Inquiry

We support bulk orders, export documentation, and worldwide shipping.

To receive a fast and accurate quotation, please provide:

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

We respond during business hours.