Product
Ingersoll Rand 47557738001 Standard Air Filter | RS45i/55i/75i
Ingersoll Rand 47557738001 standard air filter for RS45i, RS55i, and RS75i screw compressors. 4000-hour service interval under standard conditions. Not for IE/NE suffix models 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 description in the parts manual is ELEMENT, AIR FILTER (STANDARD).
It is located after the compressor intake and before the main air inlet valve. Ambient air passes through it before entering the compression chamber. If dust particles enter the main unit directly, they will wear the rotor and casing clearances; once the clearance increases, pumping efficiency drops irreversibly. The air filter element serves as this critical barrier.
For these three models, there are 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 high-dust environments the standard element will clog prematurely and the replacement interval will be significantly shortened. Always check the site conditions before deciding on 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 for that configuration) |
| Installation Location | Between intake and main air inlet valve |
| Replacement Interval | 4000 hours under standard conditions; earlier in dusty environments based on pressure differential |
3. Technical Specifications
3.1 Filtration Performance (Key Indicators)
| 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 HVAC systems (G4 / F7 etc.) |
| Dust Holding Capacity | Typical range for similar parts: 200–400 g; exact value subject to 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 correct grade was purchased, but are not suitable as acceptance criteria. For acceptance, check the pressure differential.
3.2 Flow and Resistance Parameters
| Parameter | Value / Description |
|---|---|
| Rated Airflow | Varies by model; covers intake air volumes corresponding to RS45i / RS55i / RS75i discharge capacities |
| Initial Pressure Drop | Approx. 0.2–0.5 kPa (2–5 mbar) |
| Operating Differential Range | Continuously rises from new to replacement point; no fixed value |
| Alarm / Final Resistance | Typical 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 the same discharge volume |
The air filter should be replaced when it reaches a certain pressure drop, not only when completely clogged. When the differential rises from 0.3 kPa to 1.2 kPa, the machine still runs, but electricity costs are already higher. 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 price of the filter itself.
3.3 Dimensions and Installation Parameters
| Parameter | Value / Description |
|---|---|
| Overall Dimensions | Depends on intake housing design; not marked on this page; refer to actual measurement of 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 housing seat, located by end-face seal; not threaded, not clamped |
| Sealing Method | Soft gasket on end cap, formed by housing clamping force |
| Installation Orientation | Front and back sides; sealing face toward seat, do not install reversed |
Before ordering, the simplest approach is to remove the old element and measure three dimensions: outer diameter, overall height, and seal face inner diameter. Matching these three numbers virtually eliminates errors.
3.4 Material Construction
| 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 serves as sealing carrier |
| Sealing Element | Nitrile rubber (NBR) or polyurethane | Ensures no bypass between element and seat |
| Adhesive Layer | Hot melt adhesive or polyurethane adhesive | Fixes 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 withstand high-humidity intake; not suitable for intake with persistent liquid water droplets |
| Burst Strength / Collapse Pressure | Must withstand intake negative pressure after clogging without collapsing; specific value per manufacturer drawings |
| Special Features | None. Standard type does not have 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 by rigid hour count |
| Intermediate Inspection | Recommended every 2000 hours or quarterly: inspect filter surface and pressure differential |
| Shelf Life | Unopened, stored dry and away from light; use within 3 years recommended; media strength decreases after moisture absorption |
For continuous operation, use hour-based intervals; for intermittent operation or quarterly maintenance sites, use calendar intervals, whichever comes first. Some domestic channels state approximately 2000 hours; this figure 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 | Reference to air filter test frameworks such as ISO 5011; no specific test report attached to this part number |
| Environmental / Material Compliance | Subject to 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; these do not apply to intake air filters and should not be used as performance criteria for procurement.
4. Standard Maintenance and Installation Steps
Step 1: Stop machine, disconnect power, relieve pressure Press the stop button, disconnect main power and lock out/tag out, and wait for internal pressure to fully relieve. Intake side pressure is low, but residual pressure on the main unit side may 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 the current intake resistance from the panel or differential gauge and record it. This value 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, 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 side-by-side with old: outer diameter, overall height, seal face position. Also verify the part number on the housing is 47557738001. If the site has a high-dust configuration, this step will reveal the issue—high-dust models require 24900318.
Step 6: Install new element With sealing face toward the seat, insert vertically; do not tilt. After seating, press the outer ring by hand to confirm contact, then install the cover. Tighten evenly; do not tighten bolts on one side only, as uneven force on the sealing surface can leave gaps.
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 may cause whistling), and check whether the panel 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 Enter hour meter reading, replacement date, old and new 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 the media and dust holding capacity differ. The standard element is for normal intake environments; the high-dust element is for sites with significantly elevated dust levels. Installing the wrong one will not cause immediate failure, but the service 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 use different intake part numbers. Before purchasing, read the full model on the nameplate, not just the leading numbers.
Q3: How often should it be replaced?
Under standard conditions, every 4000 hours. In dusty sites, do not rely solely on hours; check the pressure differential: replace at 1.0–1.5 kPa (subject to panel setting). Some domestic channels state 2000 hours; this figure is conservative and can be used as an early trigger in dusty environments.
Q4: Can I blow it out with compressed air and reuse it?
Not recommended. Blowing compressed air from inside out will loosen media fibers and deform pleat spacing, reducing dust holding capacity, and the damage is not visible. It may seem to save a part in the 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 strength when wet, and both strength and efficiency degrade after drying.
Q6: The pressure differential is high right after installation. Is it the filter's problem?
First check installation. Residual old rubber on the sealing surface, uneven cover clamping, or incomplete seating can all cause high differential. After ruling out these three, then suspect the element itself.
Q7: How can I tell if the air filter or oil filter is clogged?
Look at two values: if intake negative pressure (or air filter differential) increases while discharge temperature remains relatively stable, it is likely the air filter; a clogged oil filter is usually accompanied by changes in oil pressure and rising discharge temperature. Reading both values together is more accurate than one alone.
Q8: What else should be replaced together with the air filter?
According to the maintenance kit structure, at the 4000-hour interval also replace the oil filter element 24900433; at 8000 hours also add the oil separator element 23708423, return air filter 88089743, and two valve service kits. Replacing the air filter alone is fine, but do not delay the intervals of other parts.
Q9: Why is there a big price difference for air filters of the same model?
The price difference mainly comes from filter media and workmanship: paper basis 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 easy collapse when damp. For continuously running units, this price difference is usually offset by energy costs and downtime.
Q10: Can it be used after long storage?
Under unopened, dry, and dark conditions, use within 3 years is recommended. Media that has absorbed moisture may look normal but its strength has decreased, and it may collapse under negative pressure after installation, blocking 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 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 that configuration |
Verification method: check the full model on the unit nameplate (including suffix), then compare the part number in the intake section of parts manual 47612270. Both must match for this part to be correct.
7. Related Parts
The following are parts from the same RS45i / RS55i / RS75i family, related to the intake side or the same maintenance interval:
| Part Number | Description | 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's parts manual. Units with and without refrigerated dryers have different 4000-hour kit numbers; do not mix them.