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

Product Overview

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 This part number has been officially superseded by 47701891001.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

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

Dimensions: 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.

Specifications

• Old part number: 39903281
• New part number: 47701891001 (official upgrade, direct replacement)
• Brand: Ingersoll Rand
• Component type: Air Filter Element (dry pleated cartridge)
• Outer diameter: ≈380 mm (manufacturing tolerance ±2 mm)
• Inner diameter: ≈199 mm
• Height: ≈178 mm (including PU end caps; some batches marked 180 mm)
• Filtration rating: 5–10 μm; ≥98% efficiency for particles above 5 μm
• Media: Imported wood pulp filter paper / glass fiber composite (Ahlstrom grade)
• Weight: ≈1.75 kg per element
• Quantity per compressor: 1
• Recommended replacement: 2,000 hours or 1 year, whichever comes first
• Interchangeability: Fully interchangeable between old and new part numbers

Note: Dimensions are measured reference values. Manufacturing tolerance ±2 mm. Verify physical part before installation.

Compatible Ingersoll Rand Models

S Series — SSR S Series oil-injected screw compressors (90–150 kW)

• S90 — 90 kW
• S110 — 110 kW
• S150 — 150 kW

M Series — SSR M Series oil-injected screw compressors

• M185 — 185 kW

RM Series — RM Series screw compressors (185 kW)

• RM185i — 185 kW, fixed-speed
• RM185n — 185 kW, variable-speed (VSD)

Total: 6 compatible models. All are Ingersoll Rand industrial-grade oil-injected screw compressors in the medium-to-high power range.

Need 100% accurate matching? Provide the complete compressor serial number and we will verify compatibility for you.

Installation & Maintenance

Replacement interval

Factory recommendation: 2,000 hours or 1 year, whichever comes first. In dusty environments (dust 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 cause identified

Do not wash or reuse

Dry pleated elements cannot be washed or blown clean 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 inlet-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 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 inlet), and avoid over-tightening.
6. Reinstall the housing cover and confirm the restriction indicator returns to the clean position.
7. Restart the compressor and confirm inlet 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 performance, and service life, and can be used interchangeably.

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 media (Ahlstrom grade), offering 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 fixed-speed, n is variable-speed (VSD). 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 air filters per compressor?
One element.

Q10. How do I know when to replace the air filter?
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 clean with air—cleaning damages the pleat structure 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.

Pricing & Lead Time

• Old part 39903281: superseded — no longer in active supply
• New part 47701891001: active supply
• Reference price (old number): ¥1,069
• Reference price (new number): ¥1,240
• Quoted price (old number): ¥1,450
• Quoted price (new number): ¥1,419
• Lead time (new number): 45 days
• Unit: EA (each)

Bulk inquiries and worldwide shipping supported.

Request a Quotation

We support bulk procurement, export documentation, and global shipping. To receive a fast, accurate quotation, please provide:

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

We respond during business hours.