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. This part number has been officially superseded by 47701891001. Both share identical installation dimensions, filtration accuracy and service life, and are fully interchangeable 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 with ≥98% efficiency for particles above 5 μm. It combines high dust-holding capacity with low flow resistance — effectively protecting the airend rotors 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: 2000 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 (each)
• Quantity per machine: 1
• 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 accuracy: 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
• Type: Dry pleated cartridge
• Recommended replacement: 2000 hours or 1 year, whichever comes first
• Interchangeability: Fully interchangeable with old part number

Dimension note: OD, ID and height are measured reference values. Manufacturing tolerance ±2 mm; some batches are marked 180 mm height. Please verify against the physical unit before installation.

Compatible Ingersoll Rand Models

This element fits six models across three series:

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

All are classic industrial-grade oil-flooded screw compressors in the medium-to-high power range. Need 100% accurate matching? Provide the complete compressor serial number and we can verify fitment for you.

Installation & Maintenance

Replacement interval: 2000 hours or 1 year, whichever comes first. In dusty environments (workshops, construction sites), shorten inspection intervals to monthly.

Signs replacement is due:

• 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 found.

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 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 traces are present on the clean side, the seal has failed and must be corrected before installing the 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 housing cover and confirm the restriction indicator returns to the clean position.
7. Restart the unit and verify inlet restriction has returned to normal.

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

Pricing & Lead Time

• Old number 39903281: superseded — no longer active for new orders.
• New number 47701891001: active and in stock.
• Reference price: CNY 1,240 per unit (old number reference: CNY 1,069).
• Quoted price: CNY 1,419 per unit.
• Lead time: 45 days.
• Unit: EA (each).

Bulk inquiries supported; worldwide shipping available.

FAQ

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

Q2. Can 39903281 and 47701891001 be interchanged?
Yes. Both have identical installation dimensions, filtration accuracy and service life, and are directly interchangeable.

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 accuracy?
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, 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 and RM185n.

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

Q8. How often should this air filter be replaced?
2000 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 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 air-blown; 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 can perform a precise fitment check.

Request a Quotation

Bulk procurement, export documentation and worldwide shipping are supported.

To receive a fast and accurate quote, please provide:

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

We respond within business hours.