Product
Ingersoll Rand 47557738001 Standard Air Filter | RS45i/RS55i/RS75i
Ingersoll Rand 47557738001 standard air intake filter for RS45i, RS55i, and RS75i screw compressors. Recommended 4000-hour replacement 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 air intake filter element used on Ingersoll Rand RS45i, RS55i, and RS75i screw air compressors. The English name in the parts manual is ELEMENT, AIR FILTER (STANDARD).
It is located after the 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 wear the rotor and casing clearance. Once the clearance increases, compression 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 and installing the wrong one will not cause an immediate fault, but in high-dust environments 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, RS45ie, and 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 | Models with IE / NE suffix; high-dust configuration (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 (Core Metrics)
| 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 classification (G4 / F7 etc.) not applicable |
| 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 capacity and efficiency |
These figures help determine whether to replace and whether the grade is correct, but they are not 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 displacements |
| 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); 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 constant discharge |
Air filters should be replaced when they reach a certain point, not only when completely clogged. As pressure drop 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 energy consumed by a 75 kW unit during the second half of the filter's life often exceeds the filter's cost.
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 / Spacing | Depends on media and area design; verify by counting on the actual part |
| Mounting Interface | Fits into intake housing seat, located by end-face seal; not threaded, not clamped |
| Sealing Method | Soft sealing ring on end cap, compressed by housing |
| Installation Orientation | Directional; 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 Construction
| Component | Material | Notes |
|---|---|---|
| Filter Media | Wood pulp fiber filter paper (resin impregnated for reinforcement) | Standard intake grade |
| Media Weight | Typically 120–160 g/m² for similar parts | 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 seal, or polyurethane foam end caps | Also serves as seal carrier |
| Seal | Nitrile rubber (NBR) or polyurethane | Ensures no bypass at seat |
| Adhesive | Hot melt or polyurethane glue | 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 / Collapse Pressure | Must withstand intake negative pressure after clogging without collapse; specific 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 | 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; moisture reduces media strength |
For continuous operation, follow hours; for intermittent operation or quarterly maintenance, 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 frameworks such as ISO 5011; no specific test report attached to this part number |
| Environmental / Material Compliance | Refer to documentation supplied with goods |
Replacement part documentation often lists 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 basis.
4. Standard Maintenance and Installation Steps
Step 1: Stop, disconnect power, release pressure Press stop button, disconnect main power and lock out, wait for internal pressure to release. Intake pressure is low, but residual pressure on the main unit side may cause rotor movement during disassembly. Wait until pressure gauge reads zero.
Step 2: Record pressure differential before replacement Before disassembly, read and record current intake resistance from panel or differential gauge. This is the only basis for judging early or late replacement; it is lost after removal. Also record hour meter reading.
Step 3: Open intake housing, remove old element Loosen housing cover or clamping mechanism, remove old element. Keep element level during removal to prevent surface dust from falling into intake chamber. Wipe housing interior 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 residue on sealing surface, and condition of cover clamping 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 housing is 47557738001. If the 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 by hand to confirm fit, then install cover. Tighten evenly; do not tighten one bolt only, as uneven force may 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 cause whistling), check panel differential returns to new element level (approx. 0.2–0.5 kPa). If differential is high, first check installation, not the element.
Step 8: Record Record hour meter reading, replacement date, old and new differential, and part number in maintenance log. This line is more accurate than any manual for future interval decisions.
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. They 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 high dust. Installing the wrong one will not cause immediate failure, but the interval will be noticeably incorrect.
Q2: My machine is RS45ie. Can I use this?
No. This part number only corresponds to RS45i, RS55i, RS75i. Models 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 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 clean 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 filter paper loses fiber bonding when wet; after drying, strength and efficiency both decrease.
Q6: Pressure differential is high right after installation. Is the filter at fault?
Check installation first. Residual old rubber on sealing surface, uneven cover tightening, or incomplete seating can cause high differential. After ruling these out, suspect the element 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 comes with 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?
According to the maintenance kit structure, at 4000 hours also replace oil filter 24900433; at 8000 hours also add oil separator 23708423, return air filter 88089743, and two valve service kits. Replacing the air filter alone is fine, but do not delay other parts.
Q9: Why is there a big price difference for the same model air filter?
Price differences mainly come from 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, the price difference is usually offset by electricity and downtime costs.
Q10: Can it be used after long storage?
Unopened, stored dry and away from light, use within 3 years. Moisture-affected media may look normal but strength is reduced, and it may collapse under negative pressure and block 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; intake part number differs |
| 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 number in the 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 the intake side or same maintenance interval:
| Part Number | Name | Relationship |
|---|---|---|
| 24900318 | High-dust air filter element | Upgrade for same position. Use in high-dust 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 (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 tiered by unit configuration; always refer to the maintenance kit list in the unit's parts manual before ordering. Units with and without refrigerated dryers have different 4000-hour kit numbers; do not mix.