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

Product Overview

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 This part number has been officially superseded by 47701891001.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 parts share identical installation dimensions, filtration performance, and service life, making them directly interchangeable without any modification to the mounting structure.

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

Dimensions: OD approx. 380 mm, ID approx. 199 mm, height approx. 178 mm. Net weight approx. 1.75 kg per element. 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 replacement)
• Part Name: Air Filter Element
• Brand: Ingersoll Rand
• Outer Diameter: approx. 380 mm (manufacturing tolerance +/-2 mm)
• Inner Diameter: approx. 199 mm
• Height: approx. 178 mm (including top and bottom polyurethane end caps; some batches marked 180 mm)
• Filtration Rating: 5-10 microns; >=98% efficiency for particles above 5 microns
• Filter Media: Imported wood pulp filter paper / glass fiber composite (Ahlstrom-grade)
• Weight: approx. 1.75 kg per element
• Type: Dry pleated cartridge
• Quantity per Compressor: 1 element
• Recommended Replacement: 2000 hours or 1 year, whichever comes first
• Interchangeability: 39903281 and 47701891001 are fully interchangeable

Compatible Ingersoll Rand Models

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

Total 6 models: S90, S110, S150, M185, RM185i, RM185n. All are classic 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 for you.

Installation & Maintenance

Replacement Interval

Factory recommendation: 2000 hours or 1 year, whichever comes first. In dusty environments (e.g., dust workshops, construction sites), shorten inspection intervals to monthly.

Signs Replacement Is Needed

• Air 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 continues to drop after ruling out other causes.

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 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 corrected before installing the new element.
5. Wipe the sealing surface, install the new element (align approx. 199 mm ID with the intake port). Do not over-tighten.
6. Reinstall the housing cover and confirm the restriction indicator returns to the clean position.
7. Restart the unit and verify intake restriction returns to normal.

Old and new part numbers are directly interchangeable: 47701891001 and 39903281 share identical installation dimensions. No housing change or structural modification is required.

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. Installation dimensions, filtration performance, and service life are identical. They can be used interchangeably.

Q3. What are the dimensions of 39903281?
OD approx. 380 mm, ID approx. 199 mm, height approx. 178 mm (including end caps). OD manufacturing tolerance +/-2 mm.

Q4. What is the filtration rating of 39903281?
5-10 microns, with >=98% efficiency for particles above 5 microns.

Q5. What filter media does 39903281 use?
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; RM Series RM185i and RM185n.

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

Q8. How often should this air filter be replaced?
Factory recommendation: 2000 hours or 1 year, whichever comes first. Shorten in dusty environments.

Q9. How many air filters per compressor?
One element.

Q10. How do I know when to replace the air filter?
When 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 filtration efficiency.

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

Inquiry

Bulk orders, export documentation, and global shipping are available. To receive a fast and accurate quotation, please provide:

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

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