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 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 wear the rotor and casing clearance. Once the clearance increases, pumping efficiency drops irreversibly. The air filter element guards 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 part number 24900318. The two look similar; installing the wrong one will not cause an immediate fault, but in dusty sites the standard element will clog prematurely, significantly shortening the replacement interval. Always check the site conditions before ordering.
Another common pitfall: this part number does not apply to units with IE or NE suffixes. RS45i and RS45ie or RS45ne are different configurations, and intake parts 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 intake and main air inlet valve |
| Replacement Interval | 4000 hours under standard conditions; earlier in dusty environments based on pressure drop |
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% (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 | Typically 200–400 g for similar parts; exact value per incoming inspection or manufacturer data |
| Cleanable / Reusable | Not recommended. After water washing, paper media fibers collapse, 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 drop.
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 | Rises continuously from new to replacement point; no fixed value |
| Alarm / Final Resistance | Typically set at 1.0–1.5 kPa (10–15 mbar); refer 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 clogged. As pressure drop rises from 0.3 kPa to 1.2 kPa, the machine still runs but electricity costs increase. Based on 0.4%/kPa, a 75 kW unit often consumes more extra electricity in the second half of the filter's life than the filter itself costs.
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; count on actual part |
| Mounting Interface | Fits into intake box seat, located by end-face seal; not threaded, not clamped |
| Sealing Method | Soft sealing ring on end cap, compressed by housing |
| Orientation | Has front and back; sealing face toward seat, do not install backwards |
Before ordering, remove the old element and measure three dimensions: outer diameter, overall height, and seal face inner diameter. Matching these three ensures correct fit.
3.4 Material Composition
| 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 sealing ring, or polyurethane foam end caps | Also serves as seal carrier |
| Sealing Element | Nitrile rubber (NBR) or polyurethane | Ensures no bypass at seat |
| Adhesive | Hot melt glue 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 collapsing; specific value per manufacturer drawings |
| Special Functions | None. Standard type does not have oil-proof, waterproof, 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 drop, not by hours |
| Intermediate Inspection | Inspect filter surface and pressure drop every 2000 hours or quarterly |
| Shelf Life | Unopened, store dry and away from light; use within 3 years; moisture reduces media strength |
For continuous operation, base replacement on hours; for intermittent operation or quarterly maintenance, use 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 original part standard |
| Filtration Performance Test | Refer to ISO 5011 air filter test framework; 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 criteria.
4. Standard Maintenance and Installation Steps
Step 1: Stop, disconnect power, relieve pressure Press stop button, disconnect main power and lock out. Wait for internal pressure to fully release. Intake pressure is low, but residual pressure on the main unit side may cause the rotor to turn during disassembly. Wait until pressure gauge reads zero.
Step 2: Record pressure drop before replacement Before removal, read and record the current intake resistance from the panel or pressure 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 box and remove old element Loosen cover or retaining mechanism and remove old element. Keep element level to prevent 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 seal ring residue on sealing surface, and condition of cover retaining mechanism. Residual rubber ring on sealing surface is the most common cause of leakage; new element may seem seated but is actually pressing on old rubber.
Step 5: Verify new part Compare new element with old side by side: outer diameter, overall height, seal face position. Check part number on box 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. After seating, press outer ring by hand to confirm fit, then install cover. Tighten evenly; do not tighten one side 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 leakage), check panel pressure drop returns to new element level (approx. 0.2–0.5 kPa). If pressure drop is high, first check installation; do not immediately blame the element.
Step 8: Record Record hour meter reading, replacement date, old and new pressure drops, and part number in maintenance log. This line is more accurate than any manual for future interval planning.
5. FAQ
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 position and look similar, but media and dust holding capacity differ. Standard is for normal intake environments; high-dust is for sites with significantly higher dust. Installing wrong will not cause immediate failure but will result in incorrect service interval.
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 use different intake part numbers. Read the full model on the nameplate before purchasing, not just the leading numbers.
Q3: How many hours between replacements?
4000 hours under standard conditions. In dusty sites, do not rely on hours; check pressure drop: 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 guide in dusty environments.
Q4: Can I blow clean the filter and reuse?
Not recommended. Blowing compressed air from inside out loosens fibers and deforms pleats, 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 paper loses fiber bonding when wet; after drying, strength and efficiency both decrease.
Q6: Pressure drop is high right after installation. Is it the filter?
Check installation first. Residual old rubber ring on sealing surface, uneven cover tightening, or element not fully seated can cause high pressure drop. After ruling these out, suspect the element itself.
Q7: How to tell if air filter or oil filter is clogged?
Check two values: if intake negative pressure (or air filter pressure drop) increases while discharge temperature changes little, it's likely the air filter; clogged oil filter usually accompanies oil pressure change and rising discharge temperature. Reading both is more accurate than one alone.
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 items.
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 easy collapse when damp. For continuously running units, this price difference is usually offset by electricity and downtime costs.
Q10: Can I use it after long storage?
Use within 3 years if unopened, stored dry and away from light. Moist media may look normal but strength has decreased; it may 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 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: Check full model on unit nameplate (including suffix), then compare part number in intake section of parts manual 47612270. Both must match.
7. Related Parts
The following are parts from the same RS45i / RS55i / RS75i family related to the intake side or same maintenance interval:
| Part Number | Name | Relationship |
|---|---|---|
| 24900318 | High-Dust Air Filter Element | Upgrade for same position. 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 | 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 kits |
Maintenance kits are tiered by unit configuration; refer to the parts manual kit list before ordering. Units with and without refrigerated dryers have different 4000-hour kit numbers; do not mix.