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

⚠️ Part Number Upgrade Notice
47701891001 is the official Ingersoll Rand upgrade number for the older 39903281.
The two parts share identical mounting dimensions, filtration accuracy, and service life, and are directly interchangeable.
Please order using the new number 47701891001.

1. Product Information

2. Specifications

Dimensional Note: OD, ID, and height are measured reference values. OEM manufacturing tolerance is ±2 mm; some batches are marked 180 mm in height. Verify against the physical part before installation.

3. Compatible Ingersoll Rand Models

S Series — SSR S Series Oil-Flooded Rotary Screw Compressors (90–150 kW)

M Series — SSR M Series Oil-Flooded Rotary Screw Compressors

RM Series — RM Series Rotary Screw Compressors (185 kW)

Total: 6 compatible models: S90, S110, S150, M185, RM185i, RM185n. All are classic industrial-grade oil-flooded rotary screw compressors in the medium-to-high power range.

Need 100% accurate matching?
Provide the compressor's full machine serial number and we can verify for you.

4. Pricing & Lead Time

Bulk inquiries welcome. Worldwide shipping available.

5. Product Overview

39903281 is the air filter element used in Ingersoll Rand SSR S Series, M Series, and RM Series rotary screw compressors.

This part number has been officially superseded by 47701891001. The two share identical mounting dimensions, filtration accuracy, and service life, and are directly interchangeable without any modification to the installation structure.

The element uses imported wood pulp filter paper / glass fiber composite media (Ahlstrom-grade), with filtration accuracy of 5 ~ 10 μm and filtration efficiency ≥ 98% for particles above 5 μm. It combines high dust holding capacity with low flow resistance — effectively intercepting dust to protect the main rotor while avoiding excessive resistance that would drive up energy consumption.

Outer diameter ≈ 380 mm, inner diameter ≈ 199 mm, height ≈ 178 mm, net weight ≈ 1.75 kg per element. Each compressor uses 1 element; recommended replacement every 2000 hours or 1 year, whichever comes first.

6. Installation & Maintenance

Replacement Interval

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

Signs Replacement Is Needed

• Intake resistance 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 decline with no other fault found.

Do Not Clean and Reuse

Dry pleated elements cannot be washed or blown clean — cleaning damages the pleat structure and reduces filtration efficiency. Replace with a new part.

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 addressed before installing the new part;
5. Wipe the sealing surface, install the new element (align the ≈199 mm ID with the intake port), and avoid over-tightening;
6. Reinstall the housing cover and confirm the resistance indicator returns to the clean position;
7. Restart the unit and confirm intake resistance has returned to normal.

Old and new numbers are directly interchangeable: 47701891001 and 39903281 share identical mounting dimensions. No housing change or structural modification is required — simply follow the steps above.

7. 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. They share identical mounting dimensions, filtration accuracy, 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 upper and lower polyurethane end caps). OD manufacturing tolerance ±2 mm.

Q4. What is the filtration accuracy of 39903281?
5 ~ 10 μm, with filtration efficiency ≥ 98% for particles above 5 μm.

Q5. What filter media does 39903281 use?
Imported wood pulp filter paper / glass fiber composite media. OEM uses Ahlstrom-grade media, high dust holding capacity and low flow resistance.

Q6. Which compressors does 39903281 fit?
Fits 6 models: SSR S Series S90, S110, S150; M Series M185; and RM Series RM185i, RM185n.

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

Q8. How often should this air filter be replaced?
OEM recommends 2000 hours or 1 year, whichever comes first. Shorten the interval in dusty environments.

Q9. How many air filters does one compressor need?
1.

Q10. How do I know when the air filter needs replacement?
The intake resistance 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 clean; cleaning damages the pleat structure and reduces filtration efficiency.

Q12. How can I confirm it fits my machine?
Provide the compressor's full machine serial number and we can perform an accurate matching verification for you.

8. Inquiry

Bulk procurement, export documentation, and worldwide shipping are all supported.

For a fast, accurate quotation, please provide:

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

We will respond during business hours.