Product
Ingersoll Rand 47557738001 Standard Air Filter | RS45i/55i/75i
Ingersoll Rand 47557738001 standard air intake filter for RS45i, RS55i, and RS75i screw compressors. 4000-hour service interval under standard conditions. Not for IE/NE suffix units or high-dust configurations (use 24900318).
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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 name in the parts manual is ELEMENT, AIR FILTER (STANDARD).
It is located after the compressor air inlet and before the main intake valve. Outside air passes through it before entering the compression chamber. If dust particles enter the main unit directly, they wear the rotor and casing clearance. Once the clearance increases, pumping efficiency drops irreversibly. The air filter element guards this critical point.
For these same three models, two intake configurations exist: standard and high-dust. This part is the standard type, part number 47557738001; the high-dust configuration uses part number 24900318. The two look similar, and installing the wrong one will not trigger an immediate fault, but in high-dust sites the standard element will clog prematurely and the replacement interval will be noticeably shorter. Always check 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 part numbers 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 |
| Compatible Models | RS45i, RS55i, RS75i |
| Incompatible Models | Units with IE / NE suffixes; high-dust configuration units (use 24900318 for those) |
| 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% (under standard test dust and rated air flow) |
| Filter Class | Intake pre-filter grade, characterized by efficiency and dust holding capacity; not classified under HVAC systems (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 fibers collapse after water washing, reducing both dust holding capacity and efficiency. |
These figures are useful for judging whether to replace and whether the grade is correct, but not as acceptance criteria. For acceptance, use pressure differential.
3.2 Flow and Resistance Parameters
| Parameter | Value / Description |
|---|---|
| Rated Air Flow | Varies by model, covering intake air volumes corresponding to RS45i / RS55i / RS75i displacements |
| Initial Pressure Drop | Approx. 0.2–0.5 kPa (2–5 mbar) |
| Operating Pressure Differential Range | Continuously rises from new to replacement point; no fixed value |
| Alarm / Final Resistance | Common setting 1.0–1.5 kPa (10–15 mbar), subject to unit panel settings |
| Pressure Drop vs. Energy Consumption | For every 1 kPa increase in intake resistance, shaft power increases by approx. 0.3%–0.5% at constant discharge volume |
Air filters should not be replaced only when clogged; they should be replaced when they reach a certain point. When pressure differential rises from 0.3 kPa to 1.2 kPa, the machine still runs, but electricity is being wasted. 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 cost of the filter itself.
3.3 Dimensions and Installation Parameters
| Parameter | Value / Description |
|---|---|
| Dimensions | Depends on intake housing design; not specified 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 counting on the actual part |
| Mounting Interface | Fits into intake housing seat, positioned by end-face seal; not threaded or clamped |
| Sealing Method | Soft gasket on end cap, formed by housing compression |
| Installation Orientation | Directional; sealing face toward seat, do not install backwards |
Before ordering, it is easiest to 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 Composition
| Component | Material | Description |
|---|---|---|
| Filter Media | Wood pulp fiber filter paper (resin impregnated for reinforcement) | Standard intake grade configuration |
| Media Basis Weight | Typically 120–160 g/m² for similar parts | Basis 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 Condition Tolerance
| Parameter | Value / Description |
|---|---|
| Operating Temperature | Normal intake conditions, approx. −20 °C to +80 °C |
| Relative Humidity | Can handle high-humidity intake; not suitable for continuous liquid water droplets |
| Burst Strength / Collapse Pressure | Must withstand intake negative pressure after clogging without collapse; specific value per manufacturer drawings |
| Special Functions | None. Standard type without oil-proof, water-proof, or flame-retardant treatments |
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 | Recommended every 2000 hours or quarterly: check filter surface and pressure differential |
| Shelf Life | Unopened, stored dry and away from light; use within 3 years. Media strength decreases if damp. |
For continuous operation, base replacement on hours; for intermittent operation or quarterly maintenance sites, use calendar intervals, whichever comes first. Some domestic channels state approx. 2000 hours; this is conservative and can be used as an early replacement trigger in dusty environments.
3.7 Standards
| Item | Description |
|---|---|
| Manufacturer Standard | Ingersoll Rand genuine parts standard |
| Filtration Performance Testing | Referenced to air filter test frameworks such as ISO 5011; this part number does not include a specific test report |
| 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; none apply to intake air filters and should not be used as performance basis.
4. Standard Maintenance and Installation Steps
Step 1: Stop, disconnect power, and depressurize Press the stop button, disconnect main power and lock out, and wait for internal pressure to fully release. Intake pressure is low, but residual pressure on the main unit side can cause the rotor to be driven by airflow during disassembly. Wait until the pressure gauge reads zero before proceeding.
Step 2: Record pressure differential before replacement Before removal, read and record the current intake resistance from the panel or differential gauge. This number is the only basis for judging whether replacement is early or late; once removed, it is lost. Also record the hour meter reading.
Step 3: Open intake housing and remove old element Loosen the housing cover or clamping mechanism and remove the old element. Keep the element level during removal to prevent surface dust from falling into the intake chamber. Wipe the housing interior and seat with a clean cloth; dust on the seat can prevent proper sealing of the 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 the sealing surface is the most common cause of air leaks; the new element may appear seated but is actually pressing on a ring of old rubber.
Step 5: Verify new part Compare new element with old side by side: outer diameter, overall height, and seal face position. Also check that the housing label part number is 47557738001. If the site has high-dust configuration, this step will reveal the issue—high-dust models require 24900318.
Step 6: Install new element With sealing face toward seat, insert vertically; do not tilt. After seating, press the outer ring to confirm contact, then install cover. Tighten evenly; do not tighten bolts on one side only, as uneven pressure can leave gaps in the sealing surface.
Step 7: Restore and test run Restore power, start the unit, and run unloaded for a few minutes. Listen for abnormal noise at the intake (leaks cause whistling) and check whether panel pressure differential returns to new-element level (approx. 0.2–0.5 kPa). If differential is high, first check installation; do not immediately suspect the element.
Step 8: Record Record hour meter reading, replacement date, old and new pressure differentials, and part number in the maintenance log. For future interval decisions, this line is more accurate than any manual.
5. Frequently Asked Questions
Q1: What is the difference between 47557738001 and 24900318?
The former is the standard intake filter element; the latter is the high-dust intake filter element. Both install in the same location and look similar, but media and dust holding capacity differ. The standard part is for normal intake environments; the high-dust part is for sites with notably high dust. Installing the wrong one will not cause immediate failure, but the replacement interval will be noticeably incorrect.
Q2: My machine is RS45ie. Can I use this?
No. This part number corresponds only to RS45i, RS55i, and RS75i. Units with IE or NE suffixes have different intake part numbers. Before purchasing, read the full model on the nameplate, not just the leading numbers.
Q3: How many hours between replacements?
4000 hours under standard conditions. In dusty sites, do not rely solely on hours; monitor 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 trigger in dusty environments.
Q4: Can I blow out the filter and reuse it?
Not recommended. Blowing compressed air from inside out loosens media fibers and distorts pleat spacing, reducing dust holding capacity, often invisibly. It may seem to save a part short-term, but actually sends 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, both strength and efficiency degrade.
Q6: Pressure differential is high right after installation. Is the filter at fault?
Check installation first. Residual old gasket on sealing surface, uneven cover tightening, or incomplete seating can all cause high differential. Only after ruling out these three should you suspect the element itself.
Q7: How can I tell if the air filter or oil filter is clogged?
Check two values: if intake negative pressure (or air filter differential) rises while discharge temperature changes little, it is likely the air filter; a clogged oil filter usually comes with oil pressure changes and rising discharge temperature. Reading both together is more accurate than one alone.
Q8: What else should be replaced along with the air filter?
According to the maintenance kit structure, at the 4000-hour interval also replace oil filter element 24900433; at 8000 hours also add oil separator element 23708423, return air filter 88089743, and two valve service kits. Replacing only the air filter is fine, but do not delay other parts beyond their intervals.
Q9: Why is there a big price difference for the same model air filter?
Price differences mainly come from media and construction: paper basis weight, pleat count, frame strength, and end cap sealing method. Cheaper parts often cut corners in these invisible areas, resulting in higher initial pressure drop, lower dust holding capacity, and easy collapse when damp. For continuously running units, this price difference is usually offset by electricity costs and downtime.
Q10: Can it be used after long storage?
Under unopened, dry, and dark conditions, use within 3 years. Damp media may look normal but strength has decreased; when installed, it can collapse under negative pressure and block intake.
6. Compatible Models
| Model | Compatibility | Notes |
|---|---|---|
| RS45i | Compatible | 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 numbers |
| 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: check the full model on the unit nameplate (including suffix), then compare part numbers in the intake section of parts manual 47612270. Both must match for this part to be correct.
7. Related Parts
The following are parts in the same RS45i / RS55i / RS75i family, related to the intake side or the same maintenance interval:
| Part Number | Name | Relationship |
|---|---|---|
| 24900318 | High-Dust Air Filter Element | Upgrade for same location. Use this number in high-dust sites. |
| 24900433 | Oil Filter Element (FILTER, COOLANT) | Same 4000-hour maintenance interval; replace together 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 configuration |
| 47784006001 | 4000h Standard Maintenance Kit | Includes 1 x this part + 1 x oil filter element |
| 47784007001 | 4000h Maintenance Kit with Dryer | Includes this part + oil filter element + 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; before purchasing, refer to the maintenance kit list in the unit parts manual. Units with and without refrigerated dryers have different 4000-hour kit numbers; do not mix them.