Product
Ingersoll Rand 47557738001 Standard Air Filter | RS45i/55i/75i
Ingersoll Rand 47557738001 standard air filter element for RS45i, RS55i, and RS75i screw compressors. 4000-hour service interval under standard conditions. Not for IE/NE suffixed units 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 name in the parts manual is ELEMENT, AIR FILTER (STANDARD).
It is located after the machine 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 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 dusty sites the standard element will clog prematurely and the replacement interval will be significantly shortened. 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 suffix at the end of the model. RS45i, RS45ie, and RS45ne are different configurations, and intake parts 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 |
| Applicable Models | RS45i, RS55i, RS75i |
| Not Applicable | Units with IE / NE suffix; high-dust configuration units (use 24900318 for those) |
| Installation Position | Between air inlet and main intake valve |
| Replacement Interval | 4000 hours under standard conditions; earlier in dusty environments based on pressure drop |
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% (with standard test dust at rated airflow) |
| Filter Class | Intake pre-filtration grade, characterized by efficiency and dust holding capacity; not comparable to ventilation/AC grading (G4 / F7 etc.) |
| Dust Holding Capacity | Common range for similar parts: 200–400 g; exact value per 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 useful for judging whether to replace and whether the correct grade was purchased, but they are not suitable as acceptance criteria. For acceptance, look at 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 | Common setting 1.0–1.5 kPa (10–15 mbar); refer to machine panel setting |
| 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 only when completely clogged. When 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 power 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 box design; not specified on this page; measure old part for reference |
| Effective Filtration Area | Typically 1.5–4 m² for similar parts |
| Pleat Count / Pleat Spacing | Depends on filter media and area design; verify by counting on actual part |
| Mounting Interface | Fits into intake box seat, sealed by end face; not threaded, not clamped |
| Sealing Method | Soft sealing ring on end cap, compressed by housing |
| Installation Orientation | Oriented; sealing face toward seat, do not install backwards |
Before ordering, remove the old element and measure three dimensions: outer diameter, overall height, and sealing face inner diameter. Matching these three numbers ensures correct fit.
3.4 Material Construction
| 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 serves as sealing carrier |
| Seal | Nitrile rubber (NBR) or polyurethane | Ensures no bypass at seat |
| Adhesive | Hot melt glue or polyurethane adhesive | Bonds end caps to filter 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 drawing |
| 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 drop, not by hours alone |
| Intermediate Inspection | Recommended every 2000 hours or quarterly: check filter surface and pressure drop |
| Shelf Life | Unopened, stored 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 sites, 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 framework such as ISO 5011; no specific test report attached for this part number |
| Environmental / Material Compliance | Refer to documents supplied with shipment |
Replacement part data sheets often list ISO 2941 / 2942 / 2943 series, which are hydraulic filter standards; ISO 16889 multi-pass method is for liquid filtration. Neither applies to intake air filters and should not be used as performance basis for procurement.
4. Standard Maintenance and Installation Steps
Step 1: Stop machine, disconnect power, release pressure Press stop button, disconnect main power and lock out. Wait for internal pressure to fully release. Intake side pressure is low, but residual pressure on main unit side may cause rotor movement during disassembly. Wait until pressure gauge reads zero.
Step 2: Record pressure drop before replacement Before removal, read and record current intake resistance from panel or pressure gauge. This is the only basis for judging early or late replacement; once removed, the reading is lost. Also record hour meter reading.
Step 3: Open intake box, remove old element Loosen cover or clamping mechanism and remove old element. Keep element level during removal to prevent surface dust from falling into intake chamber. Wipe interior walls and seat with a clean cloth; dust on seat can prevent proper 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 old rubber ring on sealing surface is the most common cause of air leakage; new element may appear 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, sealing face position. Check part number on box is 47557738001. If site is high-dust configuration, this step will reveal the issue—high-dust machines 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 contact, then install cover. Tighten evenly; do not tighten only one side, as uneven force can leave gaps at sealing surface.
Step 7: Reassemble and test run Restore power, start machine, run unloaded for a few minutes. Listen for abnormal noise at intake (leaks cause whistling), 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 suspect filter.
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 determining next interval.
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 fit the same position and look similar, but filter media and dust holding capacity differ. Standard is for normal intake environments; high-dust is for sites with noticeably high dust. Installing the wrong one will not cause immediate failure, but the replacement interval will be noticeably off.
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. 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 alone; 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 replacement guide in dusty environments.
Q4: Can I blow out the filter and reuse it?
Not recommended. Blowing compressed air from inside out loosens filter media fibers and deforms pleat spacing, reducing 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, both strength and efficiency degrade.
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 incomplete seating can all cause high pressure drop. 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 pressure drop) 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 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 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 other parts beyond their intervals.
Q9: Why is there a big price difference for the same model air filter?
Price differences mainly come from filter 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 machines, this price difference is usually offset by electricity and downtime costs.
Q10: Can it be used after long storage?
Under unopened, dry, and dark conditions, use within 3 years. Moist 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 | 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; 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 machine nameplate (including suffix), then compare 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 | Name | Relationship |
|---|---|---|
| 24900318 | High-Dust Air Filter Element | Upgrade for same position. Use this number for 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 tiered by machine configuration. Before purchasing, refer to the maintenance kit list in the machine parts manual. The 4000-hour kit part numbers differ between units with and without refrigerated dryers; do not mix them.