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

Product Overview

Part number 47701891001 is the official Ingersoll Rand upgrade replacement for the legacy 39903281 air filter element. Both parts share identical mounting dimensions, filtration precision, and service life, allowing direct interchange without any modification to the compressor intake assembly. Orders should reference the new part number 47701891001.

This air filter element is used on Ingersoll Rand SSR S-series, M-series, and RM-series oil-injected rotary screw compressors. Each compressor requires one element.

Specifications

• Old part number: 39903281 (superseded)
• New part number: 47701891001 (official upgrade, direct interchange)
• Part type: Air filter element (dry pleated cartridge)
• Brand: Ingersoll Rand
• Outer diameter: ≈ 380 mm (manufacturing tolerance ±2 mm)
• Inner diameter: ≈ 199 mm (center bore, matches compressor intake)
• Height: ≈ 178 mm including polyurethane end caps; some batches marked 180 mm
• Filtration precision: 5–10 μm; ≥98% efficiency for particles above 5 μm
• Filter media: imported wood pulp filter paper / glass fiber composite (Ahlstrom-grade), high dust holding capacity, low flow resistance
• Net weight: ≈ 1.75 kg per element
• Quantity per compressor: 1 element
• Recommended replacement interval: 2,000 hours or 1 year, whichever comes first
• Interchangeability: 39903281 and 47701891001 are fully interchangeable

Dimensional note: Outer diameter, inner diameter, and height are measured reference values. Manufacturing tolerance is ±2 mm; some batches may be marked 180 mm in height. Verify against the original part before installation.

Compatible Ingersoll Rand Models

This air filter element fits six compressor models across three series:

• 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 listed models are classic industrial oil-injected rotary screw compressors in the medium-to-high power range. To confirm 100% compatibility, provide the complete compressor serial number and we will verify the match.

Pricing and Lead Time

• Legacy 39903281: superseded, no longer in active supply
• 47701891001: active, reference price ¥1,240 / quoted price ¥1,419 per element
• Lead time: 45 days
• Unit: EA (each)

Bulk inquiries and worldwide shipping are supported. Contact us for volume pricing and export documentation.

Installation and Maintenance

Replacement interval: Ingersoll Rand recommends 2,000 hours or 1 year, whichever comes first. In dusty environments (e.g., foundries, construction sites), inspect the element monthly and shorten the replacement cycle as needed.

Signs replacement is due:

• 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 steadily drops with no other fault identified

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. Always install a new element.

Installation steps:

1. Shut down the compressor, lock out/tag out, and 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 — dust on the clean side indicates a seal failure that must be corrected before installing the new element.
5. Wipe the sealing surface, insert the new element (≈199 mm ID aligned with the 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 intake restriction is normal.

Direct interchange: 47701891001 and 39903281 share identical mounting dimensions. No housing change or structural modification is required — simply follow the steps above.

Frequently Asked Questions

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

Q2. Can 39903281 and 47701891001 be interchanged?
Yes. Both share identical mounting dimensions, filtration precision, and service life, and 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 tolerance is ±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 / glass fiber composite, Ahlstrom-grade, offering high dust holding capacity and low flow resistance.

Q6. Which compressors does 39903281 fit?
Six models: SSR S90, S110, S150; M185; RM185i and RM185n.

Q7. What is the difference between RM185i and RM185n?
The "i" denotes fixed speed; "n" denotes variable speed. Both use the same air filter element.

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

Q9. How many elements are needed per compressor?
One.

Q10. How do I know when to replace the element?
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 cannot be washed or air-blown; cleaning damages the pleat structure and reduces filtration efficiency.

Q12. How can I confirm compatibility with my machine?
Provide the complete compressor serial number and we will perform a precise match verification.

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% match verification)
• Required quantity

We respond during business hours. Request a quotation or datasheet today.