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 It has been officially superseded by 47701891001.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 mounting dimensions, filtration performance, and service life, making them fully interchangeable without any modification to the installation.

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

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

Specifications

• Old part number: 39903281
• New part number: 47701891001 (official upgrade, direct interchange)
• Part name: Air Filter Element
• Brand: Ingersoll Rand
• Unit: EA
• Quantity per compressor: 1
• Recommended replacement: 2,000 hours or 1 year, whichever comes first
• Outer diameter: ≈380 mm (manufacturing tolerance ±2 mm)
• Inner diameter: ≈199 mm
• Height: ≈178 mm (including polyurethane end caps; some batches marked 180 mm)
• Filtration precision: 5–10 μm
• Filtration efficiency: ≥98% for particles >5 μm
• Media: Imported wood pulp filter paper / fiberglass composite (Ahlstrom grade)
• Weight: ≈1.75 kg
• Type: Dry pleated cartridge
• Interchangeability: Fully interchangeable with 39903281

Dimension note: Outer diameter, inner diameter, and height are measured reference values. Manufacturing tolerance is ±2 mm; some batches are marked 180 mm in height. Please verify against the physical part before installation.

Compatible Ingersoll Rand Models

This element fits six models across three series:

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

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

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

Pricing & Lead Time

• Old part 39903281: superseded, no longer active
• New part 47701891001: active, reference price ¥1,240, quoted price ¥1,419
• Lead time: 45 days
• Unit: EA

Bulk inquiries and global shipping supported.

Installation & Maintenance

Replacement interval

Factory recommendation: 2,000 hours or 1 year, whichever comes first. In dusty environments (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.
• Air output continues to drop after ruling out other causes.

Do not clean and reuse

Dry pleated elements cannot 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 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), and avoid over-tightening.
6. Reinstall the housing 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 mounting dimensions. No housing change or structural modification is required — simply install 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. Can 39903281 and 47701891001 be interchanged?
Yes. Mounting dimensions, filtration precision, and service life are identical; they are directly interchangeable.

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

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

Q5. What filter media is used?
Imported wood pulp filter paper / fiberglass composite (Ahlstrom grade), 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 element.

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

Q9. How many elements per compressor?
1.

Q10. How do I know when to replace the element?
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; cleaning damages the pleats and reduces filtration efficiency.

Q12. How can I confirm fitment for my machine?
Provide the complete compressor serial number and we will perform a precise compatibility check.

Request a Quotation

We support bulk purchasing, export documentation, and global shipping.

To receive 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 respond during business hours.