Product
Ingersoll Rand 47557738001 Air Filter | RS45i/55i/75i OEM Part
Ingersoll Rand 47557738001 standard air intake filter for RS45i, RS55i and RS75i screw compressors. 4000-hour service interval, ≥99% filtration efficiency. Not for IE/NE suffix units or high-dust configurations (use 24900318).
- Export packaging & documentation support
- OEM / ODM customization available
- Sample and bulk order workflow
1. Product Overview
47557738001 is the standard intake air filter element used on Ingersoll Rand RS45i, RS55i and RS75i screw compressors. The English name in the parts manual is ELEMENT, AIR FILTER (STANDARD).
It is located after the compressor intake and before the main intake valve. Ambient air passes through it before entering the compression chamber. If dust particles enter the main unit directly, they wear the rotor and housing clearances; once clearances increase, output efficiency drops irreversibly. The air filter element guards this critical point.
The same three models have two intake configurations: 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 and the replacement interval will be noticeably shorter. Check the site conditions before deciding the part number.
Another common pitfall: this part number does not apply to units with IE or NE suffix in the model. RS45i, RS45ie and RS45ne are different configurations, and intake parts are not interchangeable.
2. Basic Specifications
| Item | Details |
|---|---|
| Part Number | 47557738001 |
| English Name | ELEMENT, AIR FILTER (STANDARD) |
| Chinese Name | Standard Air Filter Element (Standard Intake Filter) |
| Brand | Ingersoll Rand |
| Part Type | Intake filtration consumable, complete replacement |
| Applicable Models | RS45i, RS55i, RS75i |
| Not Applicable | Units with IE / NE suffix; high-dust configuration units (use 24900318) |
| Installation Position | Between intake 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 Indicators)
| Parameter | Value / Description |
|---|---|
| Filtration Rating | Approx. 3–10 μm, primarily captures particles above 10 μm |
| Filtration Efficiency | ≥99% (standard test dust, rated airflow) |
| Filter Class | Intake pre-filter grade, characterized by efficiency and dust holding capacity; HVAC classes (G4 / F7 etc.) do not apply |
| Dust Holding Capacity | Common range for similar parts: 200–400 g; exact value per incoming inspection or manufacturer data |
| Cleanable / Reusable | Not recommended. Paper media fibers collapse after water 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, check pressure differential.
3.2 Flow and Resistance Parameters
| Parameter | Value / Description |
|---|---|
| Rated Airflow | Varies by model; covers intake air volume corresponding to RS45i / RS55i / RS75i displacement |
| 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 setting |
| Pressure Drop vs. Energy | Each 1 kPa increase in intake resistance raises shaft power by approx. 0.3%–0.5% at equal output |
Air filters should not be replaced only when clogged; they should be replaced when they reach a certain point. As pressure drop rises from 0.3 kPa to 1.2 kPa, the machine still runs, but electricity is being overpaid. At an estimated 0.4%/kPa, the extra power consumed by a 75 kW unit during the second half of the filter's life often exceeds the price of the filter itself.
3.3 Dimensions and Installation Parameters
| Parameter | Value / Description |
|---|---|
| Dimensions | Depends on intake box design; not marked on this page; measure the old part |
| Effective Filtration Area | Typically 1.5–4 m² for similar parts |
| Pleat Count / Pitch | Depends on media and area design; verify by physical count |
| Mounting Interface | Fits into intake box seat, located by end-face seal; not threaded, not clamped |
| Sealing Method | Soft gasket on end cap, formed by box compression |
| Installation Orientation | Oriented; sealing face toward seat, do not reverse |
Before ordering, remove the old element and measure three dimensions: outer diameter, overall height, and seal face inner diameter. Matching these three numbers ensures correct fit.
3.4 Material Construction
| Component | Material | Description |
|---|---|---|
| Filter Media | Wood pulp fiber filter paper (resin impregnated for reinforcement) | Standard intake grade |
| Media Weight | Typically 120–160 g/m² for similar parts | Weight 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 gasket, or polyurethane foam end caps | Also serve as sealing carrier |
| Seal | Nitrile rubber (NBR) or polyurethane | Ensures no bypass between element and seat |
| Adhesive | Hot melt or polyurethane adhesive | 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 suitable for continuous liquid water droplets |
| Burst Strength / Collapse Pressure | Must withstand intake negative pressure after clogging without collapse; exact value per manufacturer drawing |
| Special Functions | 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 | Inspect filter surface and pressure differential every 2000 hours or quarterly |
| Shelf Life | Unopened, dry, dark storage: use within 3 years; moisture reduces media strength |
For continuous operation, base on hours; for intermittent operation or quarterly maintenance sites, follow calendar intervals, whichever comes first. Some domestic channels state approx. 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 | References 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, which are hydraulic filter standards, and ISO 16889 multi-pass method for liquid filtration; neither applies to intake air filters and should not be used as performance basis.
4. Standard Maintenance and Installation Steps
Step 1: Stop, disconnect power, depressurize Press stop button, disconnect main power and lock out/tag out, wait for internal pressure to fully release. Intake pressure is not high, but residual pressure on the main unit side can cause rotor movement during disassembly. Wait until pressure gauge reads zero.
Step 2: Record pressure differential before replacement Before removal, read and record current intake resistance from panel or differential gauge. This number is the only basis for judging early or late replacement; once removed, it's gone. Also record hour meter reading.
Step 3: Open intake box, remove old element Loosen box cover or clamping mechanism and remove old element. Keep element level during removal to prevent surface dust from falling into intake chamber. Wipe inner walls and seat with a clean cloth; dust on seat can cause poor sealing of new element.
Step 4: Inspect seat and sealing surface Check three points: seat deformation, old gasket residue on sealing surface, and condition of cover clamping mechanism. Residual rubber on sealing surface is the most common cause of air leaks; new element may appear seated but is actually pressed on old rubber.
Step 5: Verify new part Compare new element with old side by side: outer diameter, overall height, seal face position. Verify part number on box is 47557738001. If site is high-dust configuration, this step will reveal the issue—high-dust models require 24900318.
Step 6: Install new element Sealing face toward seat, insert vertically, do not tilt. After seating, press outer ring to confirm contact, then install cover. Tighten evenly; do not tighten one side only, as uneven force can leave gaps in sealing surface.
Step 7: Restore and test run Restore power, start unit, run unloaded for a few minutes. Listen for abnormal noise at intake (leaks cause whistling), check panel differential returns to new element level (approx. 0.2–0.5 kPa). If differential is high, first check installation, do not immediately blame the element.
Step 8: Record Write hour meter reading, replacement date, old and new differential, and part number in maintenance log. This line is more accurate than any manual for determining next interval.
5. FAQ
Q1: What is the difference between 47557738001 and 24900318?
The former is a standard intake filter, the latter is a high-dust intake filter. Both fit the same position and look similar, but media and dust holding capacity differ. Standard part is for normal intake environments; high-dust part is for sites with noticeably high dust. Installing the wrong one will not cause immediate failure, but the interval will be noticeably off.
Q2: My machine is RS45ie. Can I use this?
No. This part number only corresponds to RS45i, RS55i, RS75i. Units with IE or NE suffix have different intake part numbers. Read the full model on the nameplate before buying, not just the leading numbers.
Q3: How often should it be replaced?
4000 hours under standard conditions. In dusty sites, do not rely on hours; check pressure 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. Blowing compressed air from inside out loosens media fibers and deforms pleat spacing, reducing dust holding capacity, often invisibly. Short-term savings may send dust into the main unit.
Q5: Can it be washed with water?
No. Wood pulp fiber filter paper loses fiber bonding when wet; after drying, strength and efficiency both degrade.
Q6: Pressure differential is high right after installation. Is it the filter?
Check installation first. Residual old gasket on sealing surface, uneven cover tightening, or element not fully seated can all cause high differential. Rule out these three before suspecting the element itself.
Q7: How to tell if air filter or oil filter is clogged?
Check two readings: if intake negative pressure (or air filter differential) rises while discharge temperature changes little, it's likely the air filter; a clogged oil filter usually comes with oil pressure changes and rising discharge temperature. Read both together for better accuracy.
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 kits. Replacing air filter alone is fine, but do not delay other parts' intervals.
Q9: Why is there a big price difference for the same model air filter?
Price differences mainly come from media and construction: paper weight, pleat count, frame strength, end cap sealing method. Cheaper parts often cut corners in these invisible areas, resulting in higher initial pressure drop, lower dust holding capacity, and easier collapse when damp. For continuously running units, this price difference is usually offset by electricity and downtime.
Q10: Can it be used after long storage?
Unopened, dry, dark storage: use within 3 years. Moisture-affected media may look normal but strength has decreased; installation may cause collapse under negative pressure and blockage of 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 full model on unit nameplate (including suffix), then compare part number in intake section of parts manual 47612270. Both must match for correct part.
7. Related Parts
The following are parts in the same family for RS45i / RS55i / RS75i, related to intake side or same maintenance interval:
| Part Number | Name | Relationship |
|---|---|---|
| 24900318 | High-Dust Air Filter Element | Upgrade part for same position. Use in dusty sites |
| 24900433 | Oil Filter Element (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 Element | Only for units with refrigerated dryer configuration |
| 47784006001 | 4000h Standard Maintenance Kit | Includes 1 × this part + 1 × oil filter |
| 47784007001 | 4000h Maintenance Kit with Dryer | Includes this part + oil filter + dryer filter |
| 47784008001 | 8000h Standard Maintenance Kit | Includes this part + oil filter + oil separator + return air filter + two valve service kits |
Maintenance kits are tiered by unit configuration; refer to the maintenance kit list in the unit's parts manual before ordering. Units with and without refrigerated dryer have different 4000-hour kit numbers; do not mix.