Product
Ingersoll Rand 47557738001 Standard Air Filter for RS45i/RS55i/RS75i
Standard intake air filter element for Ingersoll Rand 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).
- 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 compressor intake and before the main intake 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, 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 trigger an immediate fault, but in dusty sites, the standard element will clog prematurely, significantly shortening the replacement interval. 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 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 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% (standard test dust, 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. Paper media fibers collapse after water washing, reducing both dust holding capacity and efficiency |
These figures help determine whether to replace and whether the correct grade was purchased; they are not suitable as acceptance criteria. For acceptance, use 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 | 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 | Each 1 kPa increase in intake resistance raises shaft power by approx. 0.3%–0.5% at constant discharge |
Air filters should not be replaced only when clogged; they should be replaced when the pressure drop reaches a certain point. 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 power consumed by a 75 kW unit during the latter half of the filter's life often exceeds the price of the filter itself.
3.3 Structural Dimensions and Installation Parameters
| Parameter | Value / Description |
|---|---|
| Dimensions | Depends on intake box design; not specified on this page; verify by measuring 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 box seat, positioned by end-face seal; not threaded or clamped |
| Sealing Method | Soft sealing ring on end cap, formed by compression from 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 seal face inner diameter. Matching these three numbers ensures 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 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 collapse; specific value per manufacturer drawing |
| Special Functions | None. Standard type without oil-proof, water-proof, or flame-retardant treatments |
3.6 Lifetime and Maintenance Parameters
| Parameter | Value / Description |
|---|---|
| Recommended Replacement Interval | 4000 hours (standard conditions) |
| Interval in Dusty Environments | Significantly shorter; judge by pressure drop, not fixed hours |
| Intermediate Inspection | Inspect filter surface and pressure drop every 2000 hours or quarterly |
| Shelf Life | Store unopened in dry, dark conditions; use within 3 years; moisture reduces media strength |
For continuous operation, use hours as primary; for intermittent operation or quarterly maintenance sites, follow calendar intervals, whichever comes first. Some domestic channels state approximately 2000 hours; this is conservative and can be used as an early replacement trigger in dusty environments.
3.7 Standards
| Item | Description |
|---|---|
| Manufacturer Standard | Ingersoll Rand OEM parts standard |
| Filtration Performance Testing | References air filter test framework such as ISO 5011; no specific test report attached to this part number |
| Environmental / Material Compliance | Per documentation supplied with goods |
ISO 2941 / 2942 / 2943 series commonly found in replacement part literature are hydraulic filter standards, and 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: Shut down, 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 low, but residual pressure on the main unit side may cause rotor movement during disassembly. Wait until the pressure gauge reads zero before proceeding.
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; it is lost after removal. Also record the hour meter reading.
Step 3: Open intake box, remove old element Loosen the 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 inside of the housing and the seat with a clean cloth; dust on the seat can cause poor sealing of the 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 the sealing surface is the most common cause of air leakage; the new element may appear seated but is actually pressing on an old rubber ring.
Step 5: Verify new part Compare new element with old side by side: outer diameter, overall height, and seal face position. Verify the part number on the 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 With sealing face toward the seat, insert vertically; do not tilt. After seating, press the outer ring by hand to confirm fit, then install the cover. Tighten evenly; do not tighten bolts on one side only, as uneven force on the sealing surface may leave gaps.
Step 7: Reassemble and test run Restore power, start the unit, and run unloaded for a few minutes. Listen for abnormal noise at the intake (leaks cause whistling) and check if 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 the element.
Step 8: Record Record hour meter reading, replacement date, old and new pressure drops, and part number in the maintenance log. For future interval decisions, this entry 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. They install in the same location and look similar, but the 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, and 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 often should it be replaced?
Under standard conditions, every 4000 hours. In dusty sites, do not rely on hours; check pressure drop: replace when it reaches 1.0–1.5 kPa (subject to panel setting). Some domestic channels state 2000 hours; this is conservative and can be used as an early trigger in dusty environments.
Q4: Can I blow it out with compressed air and reuse?
Not recommended. Blowing compressed air from inside out loosens media fibers and deforms pleat spacing, reducing dust holding capacity, often invisibly. 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 the element at fault?
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 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 pressure drop) rises while discharge temperature remains stable, it is likely the air filter; a clogged oil filter usually accompanies oil pressure changes and rising discharge temperature. Reading both values together is more accurate than one alone.
Q8: What else should be replaced along with the air filter?
Per the maintenance kit structure, at the 4000-hour interval also replace the oil filter element 24900433; at 8000 hours, also add oil separator element 23708423, return air filter 88089743, and two valve service kits. Replacing only the air filter is acceptable, but do not delay other parts beyond their intervals.
Q9: Why is there a big price difference for the same model air filter?
The difference mainly comes from media and construction: paper weight, pleat count, support strength, and 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 it be used after long storage?
Under unopened, dry, dark conditions, use within 3 years. Moisture-exposed media may look normal but strength is reduced, and it may collapse under negative pressure and block intake after installation.
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 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 | Name | Relationship |
|---|---|---|
| 24900318 | High-Dust Air Filter Element | Upgrade for same position. Use this number for 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 Element (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 element |
| 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.