Product
Ingersoll Rand 47557738001 Standard Air Filter | RS45i/RS55i/RS75i
Ingersoll Rand 47557738001 standard air intake filter for RS45i, RS55i, RS75i screw compressors. 4000-hour service interval under standard conditions. Not for IE/NE suffixed units or high-dust configurations (use 24900318). Full specifications, installation guide, and maintenance kit references included.
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1. Product Overview
47557738001 is the standard air intake filter element used on Ingersoll Rand RS45i, RS55i, and RS75i screw compressors. The English description in the parts manual is ELEMENT, AIR FILTER (STANDARD).
It is located after the air inlet and before the main intake valve. Ambient air passes through it before entering the compression chamber. If dust particles enter the airend directly, they wear the rotor and housing clearances. Once clearance increases, volumetric efficiency drops irreversibly. The air filter element guards this critical point.
For these three models, two intake configurations exist: standard and high-dust. This part is the standard type, part number 47557738001; the high-dust configuration uses a different part number, 24900318. The two look similar and installing the wrong one will not trigger an immediate fault, but in dusty sites the standard element will clog prematurely, significantly shortening the replacement interval. Always check the site conditions before selecting the part number.
Another common pitfall: this part number does not apply to units with IE or NE suffixes. RS45i, RS45ie, and RS45ne are different configurations, and intake parts are not interchangeable.
2. Basic Specifications
| Item | Details |
|---|---|
| Part Number | 47557738001 |
| English Description | ELEMENT, AIR FILTER (STANDARD) |
| Chinese Description | Standard Air Filter Element (Standard Intake Filter) |
| Brand | Ingersoll Rand |
| Part Type | Intake filtration consumable, complete replacement |
| Compatible Models | RS45i, RS55i, RS75i |
| Incompatible Models | Units with IE / NE suffix; high-dust configuration units (use 24900318) |
| Installation Location | Between air inlet and main intake valve |
| Replacement Interval | 4000 hours under standard conditions; earlier in dusty environments based on pressure differential |
3. Technical Specifications
3.1 Filtration Performance (Core Metrics)
| Parameter | Value / Description |
|---|---|
| Filtration Rating | Approx. 3–10 μm, primarily captures particles above 10 μm |
| Filtration Efficiency | ≥99% (with standard test dust at rated airflow) |
| Filter Class | Intake pre-filtration grade, characterized by efficiency and dust holding capacity; not classified under ventilation/AC standards (G4 / F7 etc.) |
| Dust Holding Capacity | Typically 200–400 g for similar parts; exact value per incoming inspection or manufacturer data |
| Cleanable / Reusable | Not recommended. Paper media collapses after washing, reducing both dust holding capacity and efficiency |
These figures help judge whether to replace and whether the grade is correct; they are not acceptance criteria. For acceptance, rely on pressure differential.
3.2 Flow and Resistance Parameters
| Parameter | Value / Description |
|---|---|
| Rated Airflow | Varies by model; covers intake air volume for RS45i / RS55i / RS75i |
| Initial Pressure Drop | Approx. 0.2–0.5 kPa (2–5 mbar) |
| Operating Differential Range | Rises continuously from new to replacement point; no fixed value |
| Alarm / Final Resistance | Typical setting 1.0–1.5 kPa (10–15 mbar); refer to unit panel settings |
| Pressure Drop vs. Energy | Each 1 kPa increase in intake resistance raises shaft power by approx. 0.3%–0.5% at constant discharge |
Air filters should not be run until completely clogged; replace at a certain point. As pressure drop rises from 0.3 kPa to 1.2 kPa, the machine still runs but electricity is wasted. At an estimated 0.4%/kPa, the extra energy consumed by a 75 kW unit during the second half of the filter's life often exceeds the filter's cost.
3.3 Dimensions and Installation Parameters
| Parameter | Value / Description |
|---|---|
| Dimensions | Depends on intake housing design; not listed here; measure old part |
| Effective Filtration Area | Typically 1.5–4 m² for similar parts |
| Pleat Count / Spacing | Depends on media and area design; count on actual part |
| Mounting Interface | Fits into intake housing seat, located by end-face seal; not threaded, not clamped |
| Sealing Method | Soft seal ring on end cap, compressed by housing |
| Installation Orientation | Oriented; sealing face toward seat, do not install backwards |
Before ordering, remove the old element and measure three dimensions: outer diameter, overall height, and seal inner diameter. Matching these three ensures correct fit.
3.4 Material Construction
| Component | Material | Notes |
|---|---|---|
| Filter Media | Wood pulp fiber paper (resin impregnated) | Standard intake grade |
| Media Weight | Typically 120–160 g/m² for similar parts | Affects burst strength and dust holding space |
| Inner/Outer Support | Galvanized steel wire mesh or perforated plate | Prevents collapse under negative pressure, maintains pleat shape |
| End Caps | Metal end caps with soft seal ring, or polyurethane foam end caps | Also serve as sealing carrier |
| Seal | Nitrile rubber (NBR) or polyurethane | Ensures no bypass at seat |
| Adhesive | Hot melt or polyurethane glue | Bonds end caps to media |
3.5 Operating Tolerance Parameters
| Parameter | Value / Description |
|---|---|
| Operating Temperature | Normal intake conditions, approx. −20 °C to +80 °C |
| Relative Humidity | Handles high-humidity intake; not for continuous liquid water droplets |
| Burst / Collapse Pressure | Must withstand intake negative pressure after clogging without collapse; specific value per manufacturer drawing |
| Special Features | None. Standard type without oil-proof, water-proof, or flame-retardant treatment |
3.6 Life and Maintenance Parameters
| Parameter | Value / Description |
|---|---|
| Recommended Replacement Interval | 4000 hours (standard conditions) |
| Interval in Dusty Environments | Significantly shorter; judge by pressure differential, not fixed hours |
| Intermediate Inspection | Every 2000 hours or quarterly: check element surface and pressure differential |
| Shelf Life | Unopened, stored dry and away from light, use within 3 years; moisture reduces media strength |
For continuous operation, follow hours; for intermittent or quarterly maintenance, follow calendar intervals, whichever comes first. Some domestic channels state about 2000 hours; this is conservative and can be used as an early replacement guide in dusty environments.
3.7 Standards
| Item | Description |
|---|---|
| Manufacturer Standard | Ingersoll Rand genuine parts standard |
| Filtration Performance Test | Refers to air filter test framework such as ISO 5011; no specific test report attached to this part number |
| Environmental / Material Compliance | Per documentation supplied with goods |
Replacement part documentation often cites ISO 2941 / 2942 / 2943 series for hydraulic filters and ISO 16889 multi-pass method for liquid filtration; these do not apply to intake air filters and should not be used as performance basis.
4. Standard Maintenance and Installation Steps
Step 1: Stop, disconnect power, relieve pressure Press stop, disconnect main power and lock out, wait for internal pressure to bleed. Intake pressure is low, but residual pressure on the airend side can rotate the rotor during disassembly. Wait until gauge reads zero.
Step 2: Record pressure differential before replacement Before removal, read and record current intake resistance from panel or gauge. This is the only basis for judging early or late replacement; once removed, it's lost. Also record hour meter reading.
Step 3: Open intake housing, remove old element Loosen cover or clamp, remove old element. Keep element level to avoid dust falling into intake chamber. Wipe housing interior and seat with clean cloth; dust on seat prevents proper sealing.
Step 4: Inspect seat and sealing surface Check three points: seat deformation, old seal residue on sealing surface, and condition of cover clamp. Residual rubber is the most common cause of leakage; new element may seem seated but is actually on old rubber.
Step 5: Verify new part Compare new element with old side by side: outer diameter, overall height, seal position. Verify part number on housing is 47557738001. If site is high-dust configuration, this step will reveal it—high-dust models require 24900318.
Step 6: Install new element Sealing face toward seat, insert vertically, do not tilt. Press outer ring to confirm contact, then install cover. Tighten evenly; do not tighten one bolt only, or sealing surface may gap.
Step 7: Restore and test run Restore power, start unit, run unloaded for a few minutes. Listen for abnormal noise at intake (whistling indicates leak), check panel differential returns to new level (approx. 0.2–0.5 kPa). If high, check installation first; do not immediately blame element.
Step 8: Record Enter hour meter reading, replacement date, old/new differential, and part number in maintenance log. This line is more accurate than any manual for future interval decisions.
5. Frequently Asked Questions
Q1: What is the difference between 47557738001 and 24900318?
The former is the standard intake filter, the latter is the high-dust intake filter. Both fit the same location, look similar, but media and dust holding capacity differ. Standard for normal intake, high-dust for dusty sites. Wrong installation won't cause immediate fault, but intervals will be off.
Q2: My machine is RS45ie. Can I use this?
No. This part number only applies to RS45i, RS55i, RS75i. Units with IE or NE suffix use different intake part numbers. Read the full model on the nameplate, not just the leading numbers.
Q3: How many hours before replacement?
4000 hours under standard conditions. In dusty sites, do not rely on hours; check differential: replace at 1.0–1.5 kPa (per panel setting). Some domestic channels state 2000 hours; this is conservative and can be used as an early replacement guide in dusty environments.
Q4: Can I blow it out and reuse?
Not recommended. Compressed air from inside out loosens fibers and distorts pleats, reducing dust holding capacity invisibly. Short-term saving may send dust into the airend.
Q5: Can it be washed?
No. Wood pulp fiber paper loses fiber bonding when wet; after drying, strength and efficiency degrade.
Q6: Differential is high right after installation. Is the element faulty?
Check installation first. Residual old rubber on seal, uneven cover tightening, or incomplete seating can cause high differential. Rule these out before suspecting the element.
Q7: How to tell if air filter or oil filter is clogged?
Check two values: if intake negative pressure (or air filter differential) rises but discharge temperature is stable, likely air filter; oil filter clogging usually accompanies oil pressure change and rising discharge temperature. Read both together.
Q8: What else should be replaced with the air filter?
Per maintenance kit structure, at 4000 hours also replace oil filter 24900433; at 8000 hours add oil separator 23708423, return air filter 88089743, and two valve service packs. Replacing air filter alone is fine, but do not delay other parts.
Q9: Why do prices vary so much for the same model?
Price differences mainly come from media and construction: paper weight, pleat count, support strength, end cap sealing. Cheaper parts often cut corners here, resulting in higher initial differential, lower dust holding capacity, and moisture collapse. For continuous operation, the price difference is usually offset by energy and downtime costs.
Q10: Can it be used after long storage?
Use within 3 years if unopened, stored dry and away from light. Moisture-damaged media may look normal but strength is reduced; under negative pressure it may collapse and block intake.
6. Compatible Models
| Model | Compatibility | Notes |
|---|---|---|
| RS45i | Compatible | Part number listed in parts manual and price list |
| RS55i | Compatible | Same as above |
| RS75i | Compatible | Same as above |
| RS45ie / RS55ie / RS75ie | Not compatible | Different model suffix, different intake part number |
| RS45ne / RS55ne / RS75ne | Not compatible | Same as above |
| Other RS series (RS30, RS90 and above) | Not compatible | Different frame, intake parts not interchangeable |
| High-dust configuration RS45i / RS55i / RS75i | Not compatible | Use 24900318 for this configuration |
Verification method: Read the full model (including suffix) on the unit nameplate, then compare part number in the intake section of parts manual 47612270. Both must match.
7. Related Parts
The following are related parts for RS45i / RS55i / RS75i family, associated with intake side or same maintenance interval:
| Part Number | Description | Relationship |
|---|---|---|
| 24900318 | High-dust air filter element | Upgrade for same location. Use in dusty sites |
| 24900433 | Oil filter (FILTER, COOLANT) | Same 4000-hour maintenance interval, replace with air filter |
| 23708423 | Oil separator element | Added at 8000-hour interval |
| 88089743 | Return air filter (.25 INCH BSPT) | Added at 8000-hour interval |
| 24242398 | Dryer filter (DRYER FILTER) | Only for units with refrigerated dryer |
| 47784006001 | 4000h standard maintenance kit | Includes 1 air filter + 1 oil filter |
| 47784007001 | 4000h maintenance kit with dryer | Includes air filter + oil filter + dryer filter |
| 47784008001 | 8000h standard maintenance kit | Includes air filter + oil filter + oil separator + return air filter + two valve service packs |
Maintenance kits are tiered by unit configuration; refer to the parts manual kit list before ordering. Units with and without dryer have different 4000-hour kit numbers; do not mix.