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

Product Overview

The 39903281 air filter element has been officially superseded by part number 47701891001. Both parts share identical mounting dimensions, filtration performance, and service life, allowing direct interchange without any modification to the compressor.

This element is designed for Ingersoll Rand SSR S-series, M-series, and RM-series oil-injected screw compressors. It 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, protecting the compressor rotor while avoiding unnecessary energy consumption.

Dimensions: OD ≈ 380 mm, ID ≈ 199 mm, height ≈ 178 mm, net weight ≈ 1.75 kg. One element per compressor. Recommended replacement: every 2,000 hours or annually, 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 (each)
• Quantity per compressor: 1
• 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 rating: 5–10 μm; ≥98% efficiency for particles above 5 μm
• Filter media: Imported wood pulp filter paper / glass fiber composite (Ahlstrom grade)
• Weight: ≈ 1.75 kg (net, per element; slight batch variation possible)
• Type: Dry pleated cartridge
• Recommended replacement interval: 2,000 hours or 1 year, whichever comes first
• Interchangeability: 100% compatible between old and new part numbers

Compatible Ingersoll Rand 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)

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

For 100% accurate matching, provide the complete compressor serial number and we will verify compatibility.

Price & Lead Time

• Old part 39903281: superseded; reference price ¥1,069; quotation ¥1,450
• New part 47701891001: active; reference price ¥1,240; quotation ¥1,419; lead time 45 days

Bulk inquiries welcome. Worldwide shipping available.

Installation & Maintenance

Replacement interval

Factory recommendation: 2,000 hours or 1 year, whichever comes first. In dusty environments (e.g., foundries, construction sites), inspect monthly.

Signs replacement is needed

• Air restriction indicator enters the yellow zone and remains there after shutdown.
• Dust traces visible on the clean side of the filter housing.
• Discharge volume steadily decreases with no other cause 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 the compressor. 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; correct the issue before installing a new element.
5. Wipe the sealing surface, insert the new element (ID ≈199 mm aligned with the 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 intake restriction is normal.

Direct interchange: 47701891001 and 39903281 share identical mounting dimensions. No housing change or structural modification is required. Follow the steps above for direct installation.

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 performance, 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 rating of 39903281?
5–10 μm; ≥98% efficiency for particles above 5 μm.

Q5. What filter media does 39903281 use?
Imported wood pulp filter paper / glass fiber composite (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; RM-series RM185i and 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 air filters does one compressor require?
1 element.

Q10. How do I know when to replace the air filter?
The air 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 fitment for my machine?
Provide the complete compressor serial number and we will perform a precise compatibility check.

Request a Quotation

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
• Complete compressor serial number (for 100% accurate compatibility verification)
• Required quantity

We will respond during business hours.