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 It has been officially superseded by part 47701891001. Both part numbers share identical mounting dimensions, filtration performance and service life, making them fully interchangeable — no housing modification or adapter is required.

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, protecting the compressor rotor without increasing energy consumption.

Dimensions: OD ≈380 mm, ID ≈199 mm, height ≈178 mm (including polyurethane end caps). Net weight ≈1.75 kg per element. One element is used per compressor. Recommended replacement interval is 2,000 hours or 1 year, whichever comes first.

Specifications

Parameter	Value	Notes
Old Part Number	39903281	Superseded
New Part Number	47701891001	Official upgrade, direct replacement
Part Name	Air Filter Element	—
Brand	Ingersoll Rand	—
Unit	EA (each)	—
Quantity per Compressor	1	—
Recommended Replacement	2,000 hours or 1 year	Whichever comes first
Outer Diameter	≈380 mm	Max. OD of filter body, manufacturing tolerance ±2 mm
Inner Diameter	≈199 mm	Center mounting bore, matches compressor intake
Height	≈178 mm	Including upper and lower 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 / glass fiber composite	Ahlstrom-grade, high dust capacity, low flow resistance
Weight	≈1.75 kg	Net weight per element, slight batch variation
Type	Dry pleated cartridge	—
Interchangeability	Fully interchangeable	Identical mounting, filtration, and service life

Note: Dimensions are measured reference values. Manufacturing tolerance ±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 the following 6 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)

All are classic industrial 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.

Pricing & Lead Time

Item	Old 39903281	New 47701891001
Status	Superseded	Active
Reference Price	¥1,069	¥1,240
Quoted Price	¥1,450	¥1,419
Lead Time	—	45 days
Unit	EA	EA

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 and shorten the interval as needed.

Signs Replacement Is Needed

• 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 drops continuously with no other cause identified.

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 and must be corrected before installing a new element.
5. Wipe the sealing surface, insert the new element (ID ≈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 intake restriction returns to normal.

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

FAQ

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

Q2. Can 39903281 and 47701891001 be interchanged?
Yes. Mounting dimensions, filtration rating, and service life are identical; they are fully interchangeable.

Q3. What are the dimensions of 39903281?
OD ≈380 mm, ID ≈199 mm, height ≈178 mm (including polyurethane 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 / glass fiber composite media (Ahlstrom grade), offering high dust capacity and low flow resistance.

Q6. Which compressors does 39903281 fit?
Six models: SSR S90, S110, S150; M185; 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 in dusty environments.

Q9. How many air filters per compressor?
One.

Q10. How do I know when to replace the air filter?
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 blown with air; cleaning damages the pleat structure and reduces efficiency.

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

Request a Quotation

We support bulk orders, export documentation, and worldwide shipping.

To receive a fast and accurate quote, please provide:

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

We respond during business hours.