Product
Ingersoll Rand 47557738001 Standard Air Filter | RS45i/55i/75i
Ingersoll Rand 47557738001 standard air filter element for RS45i, RS55i, RS75i rotary screw compressors. 4000-hour service interval under standard conditions. Not for IE/NE suffix units or high-dust configurations (use 24900318). OEM export supply with full traceability.
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- OEM / ODM customization available
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1. Product Overview
47557738001 is the standard intake air filter element used on Ingersoll Rand RS45i, RS55i, and RS75i rotary screw air compressors. Its English name in the parts manual is ELEMENT, AIR FILTER (STANDARD).
It is located after the unit's air intake 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 will wear the clearance between the rotors and the housing. Once the clearance increases, the pumping efficiency drops, and this wear is irreversible. The air filter element's role is to guard this critical point.
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 another part number, 24900318. The two look similar, and installing the wrong one will not immediately trigger a fault, but in high-dust environments, the standard element will clog prematurely, significantly shortening the replacement interval. When purchasing, first assess the site conditions, then determine 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 the intake part numbers are not interchangeable.
2. Basic Parameters
| 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 air 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 Parameters (Core 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-filter 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. After water washing, paper filter media fibers collapse, reducing both dust holding capacity and efficiency |
These figures are suitable for judging whether to replace or if the wrong grade was purchased; they 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 volume corresponding to RS45i / RS55i / RS75i displacement |
| 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 the same discharge volume |
Air filters should be replaced when they reach a certain pressure drop, not just when clogged. When the pressure differential rises from 0.3 kPa to 1.2 kPa, the machine still runs, but you are already paying extra electricity. 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 cost of the filter itself.
3.3 Structural Dimensions and Installation Parameters
| Parameter | Value / Description |
|---|---|
| Dimensions | Depends on intake box 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 filter media and area design; verify by physical count |
| Mounting Interface | Fits into intake box seat, positioned by end-face seal; not threaded, not clamped |
| Sealing Method | Soft sealing ring on end cap, formed by compression from housing |
| Installation Orientation | Front and back sides; sealing face toward seat, do not install backwards |
Before ordering, it is easiest to remove the old part and measure three dimensions: outer diameter, overall height, and inner diameter of sealing face. Matching these three numbers will almost guarantee a 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 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 sealing ring, or polyurethane foam end caps | Also serve as sealing carrier |
| Seal | Nitrile rubber (NBR) or polyurethane | Ensures no bypass between element and seat |
| Adhesive Layer | Hot melt adhesive or polyurethane adhesive | Fixes end caps to filter media |
3.5 Operating Condition Tolerance Parameters
| 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 sustained liquid water droplets |
| Burst Strength / Collapse Pressure | Must withstand intake negative pressure after filter clogging without collapsing; specific value per manufacturer drawings |
| Special Functions | 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, do not rigidly follow hours |
| Intermediate Inspection | Recommended every 2000 hours or quarterly: check filter surface and pressure differential |
| Shelf Life | Unopened, stored dry and away from light; recommended use within 3 years; moisture reduces media strength |
For continuous operation, base replacement on hours; for intermittent operation or quarterly maintenance sites, follow 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 Test | Refer to air filter test framework such as ISO 5011; specific test report not attached to this part number |
| Environmental / Material Compliance | Subject to documentation supplied with shipment |
Replacement part documentation often lists 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 for procurement.
4. Standard Maintenance and Installation Steps
Step 1: Stop, disconnect power, relieve pressure Press the 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 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 and record the current intake resistance from the panel or pressure gauge. This number is the only basis for judging whether replacement is early or late; it is lost after removal. Also record the hour meter reading.
Step 3: Open intake box, remove old filter Loosen the box cover or clamping mechanism, remove the old filter. Keep the filter level during removal to prevent surface dust from falling into the intake chamber. Wipe the inner walls and seat with a clean cloth; dust on the seat can cause poor sealing of the new filter.
Step 4: Inspect seat and sealing surface Check three points: seat deformation, old seal ring 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 filter may appear seated but is actually pressing on an old rubber ring.
Step 5: Verify new part Compare new filter with old side by side: outer diameter, overall height, sealing face position. Then verify the part number on the box is 47557738001. If the site has high-dust configuration, this step will reveal the issue—high-dust models require 24900318.
Step 6: Install new filter With sealing face toward seat, insert vertically; do not angle. After seating, press the outer ring by hand to confirm contact, then install cover. Tighten evenly; do not tighten only one side, as uneven force on sealing surface can leave gaps.
Step 7: Restore and test run Restore power, start unit, run unloaded for a few minutes. Listen for abnormal noise at intake (leaks may cause whistling), check if panel pressure differential returns to new part level (approx. 0.2–0.5 kPa). If differential is high, first check installation; do not immediately blame the filter.
Step 8: Record Record hour meter reading, replacement date, old and new pressure differentials, and part number in maintenance log. This line is more accurate than any manual for determining the 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 in the same position and look similar, but the filter media and dust holding capacity differ. The standard part is for normal intake environments; the high-dust part is for sites with significantly high dust. 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 only corresponds to RS45i, RS55i, RS75i. Units with IE or NE suffix have different intake part numbers. Before purchasing, 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 rigidly follow hours; check pressure differential: replace when it reaches 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 replacement trigger in dusty environments.
Q4: Can I blow out the filter and reuse it?
Not recommended. Blowing compressed air from inside out will loosen filter media fibers, deform pleat spacing, reduce dust holding capacity, and the damage is not visible. Short-term savings may actually 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 a filter problem?
Check installation first. Residual old rubber on sealing surface, uneven cover tightening, or filter not fully seated can all cause high differential. After ruling out these three, then suspect the filter itself.
Q7: How to 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 accompanies oil pressure changes and rising discharge temperature. Reading both 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 oil filter 24900433; at 8000 hours also add oil separator 23708423, return air filter 88089743, and two valve service kits. Replacing only the air filter is fine, but do not delay the intervals of other parts.
Q9: Why is there a big price difference for the same model air filter?
The price difference mainly comes from filter media and workmanship: 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 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, it is recommended to use within 3 years. Moisture-exposed filter media may look normal but strength has decreased; installation may cause collapse under negative pressure and block intake.
6. Compatible Models
| Model | Compatibility | Notes |
|---|---|---|
| RS45i | Yes | Listed in parts manual and price list |
| RS55i | Yes | Same as above |
| RS75i | Yes | Same as above |
| RS45ie / RS55ie / RS75ie | No | Different model suffix, different intake part number |
| RS45ne / RS55ne / RS75ne | No | Same as above |
| Other RS series (RS30, RS90 and above) | No | Different frame, intake parts not interchangeable |
| High-dust configuration RS45i / RS55i / RS75i | No | Use 24900318 for this 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 to confirm this part.
7. Related Parts
The following are parts in the same family as RS45i / RS55i / RS75i, related to the intake side or the same maintenance interval:
| Part Number | Name | Relationship |
|---|---|---|
| 24900318 | High-Dust Air Filter Element | Upgrade part for same position. Use this number in high-dust sites |
| 24900433 | Oil Filter (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 | Only for units with refrigerated dryer configuration |
| 47784006001 | 4000h Standard Maintenance Kit | Includes 1 x this part + 1 x 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 categorized by unit configuration; please refer to the maintenance kit list in the unit's parts manual before purchasing. Units with and without refrigerated dryers have different 4000-hour kit numbers; do not mix them.