Product
Ingersoll Rand 47557738001 Standard Air Filter | RS45i/55i/75i
Ingersoll Rand 47557738001 standard air filter element for RS45i, RS55i, and RS75i screw compressors. Designed for standard intake conditions with a 4000-hour replacement interval. Not for IE/NE suffix units or high-dust configurations (use 24900318). OEM and wholesale inquiries welcome.
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1. Product Overview
47557738001 is the standard intake air filter element used on Ingersoll Rand RS45i, RS55i, and RS75i screw compressors. In the parts manual, its English name is ELEMENT, AIR FILTER (STANDARD).
It is located after the compressor 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 rotor and housing clearance. As the clearance increases, compression efficiency drops irreversibly. The air filter element serves as the barrier to prevent this.
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 cause an immediate fault, but in dusty sites, 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 their 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 for that configuration) |
| Installation Position | Between intake port 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 Parameters (Core Indicators)
| Parameter | Value / Description |
|---|---|
| Filtration Rating | Approx. 3–10 μm, primarily capturing particles above 10 μm |
| Filtration Efficiency | ≥99% (under standard test dust and rated airflow) |
| Filter Class | Intake pre-filtration grade, characterized by efficiency and dust holding capacity; not comparable to ventilation/AC grading systems (G4 / F7 etc.) |
| Dust Holding Capacity | Typically 200–400 g for similar parts; exact value subject to incoming inspection or manufacturer data |
| Cleanable / Reusable | Not recommended. Paper filter media fibers collapse after 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, 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 Range | Continuously rises from new to replacement point; no fixed value |
| Alarm / Final Resistance | Common setting 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 |
Air filters should not be replaced only when clogged; they should be replaced when they reach a certain point. 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 filter's cost.
3.3 Structural Dimensions and Installation Parameters
| Parameter | Value / Description |
|---|---|
| Dimensions | Depends on intake housing 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 / Pleat Spacing | Depends on filter media and area design; refer to physical count |
| Installation Interface | Fits into intake housing seat, positioned by end-face seal; not threaded, not clamped |
| Sealing Method | Soft sealing ring on end cap, formed by housing compression |
| Installation Orientation | Oriented; sealing face toward seat, do not install reversed |
Before ordering, it is easiest to remove the old part and measure three dimensions: outer diameter, overall height, and sealing 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 configuration |
| 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 sealing ring, or polyurethane foam end caps | Also serves as sealing carrier |
| Sealing Element | Nitrile rubber (NBR) or polyurethane | Ensures no bypass between element and seat |
| Adhesive Layer | Hot melt adhesive or polyurethane adhesive | Bonds 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 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, 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 by hours |
| Intermediate Inspection | Recommended every 2000 hours or quarterly: check filter surface and pressure drop |
| Shelf Life | Unopened, stored dry and away from light; recommended use within 3 years; media strength decreases if damp |
For continuous operation, use hours as the primary basis; for intermittent operation or quarterly maintenance sites, use calendar intervals, whichever comes first. Some domestic channels state approx. 2000 hours; this figure is conservative and can be used as an advance interval for 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; specific test report not attached for this part number |
| Environmental / Material Compliance | Subject to documentation supplied with goods |
The ISO 2941 / 2942 / 2943 series commonly found in replacement part documentation are hydraulic filter standards; ISO 16889 multi-pass method is for liquid filtration, and neither applies to intake air filters. They should not be used as performance basis for procurement.
4. Standard Maintenance and Installation Steps
Step 1: Stop, disconnect power, and relieve pressure Press the stop button, disconnect main power and lock out, and 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 drop before replacement Before removal, read the current intake resistance from the panel or pressure gauge and record it. This value 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 housing and remove old element Loosen the housing 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 housing interior and seat with a clean cloth; dust on the seat can cause poor sealing of the new element.
Step 4: Inspect seat and sealing surface Focus on three points: whether the seat is deformed, whether there is old seal residue on the sealing surface, and whether the cover clamping mechanism is intact. 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 the new element side-by-side with the old one: outer diameter, overall height, and sealing surface position. Also check that the part number on the housing is 47557738001. If the site is a 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 insert at an angle. After positioning, 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 can leave gaps.
Step 7: Restore and test run Restore power, start the unit, and run unloaded for a few minutes. Listen for abnormal noise at the intake (leakage may cause a whistling sound) and check whether the panel pressure drop returns to new-part level (approx. 0.2–0.5 kPa). If pressure drop is high, first check installation; do not immediately suspect the element.
Step 8: Record Write the hour meter reading, replacement date, old and new pressure drops, and part number in the maintenance record. For future interval decisions, this line is more accurate than any manual.
5. FAQ
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 are installed 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 interval will be noticeably incorrect.
Q2: My machine is RS45ie. Can I use this?
No. This part number corresponds only to RS45i, RS55i, and RS75i. Units with IE or NE suffixes 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 stick to hours; check pressure drop: replace when it reaches 1.0–1.5 kPa (refer to panel setting). Some domestic channels state 2000 hours; this figure is conservative and can be used as an advance interval for dusty environments.
Q4: Can I blow it clean and reuse?
Not recommended. Blowing compressed air from inside out will loosen filter media fibers and deform pleat spacing, reducing dust holding capacity, and this is not visible to the eye. It may seem to save a part in the short term, but actually sends dust into the main unit.
Q5: Can it be washed with water?
No. Wood pulp fiber filter paper loses fiber bonding when wet, and strength and efficiency both degrade after drying.
Q6: Pressure drop is high right after installation. Is it the filter's problem?
Check installation first. Residual old rubber ring on the sealing surface, uneven cover tightening, or incomplete seating of the element can all cause high pressure drop. After ruling out these three, then suspect the element itself.
Q7: How to tell if the air filter is clogged or the oil filter is clogged?
Look at two values: if intake negative pressure (or air filter pressure drop) increases while discharge temperature changes little, it is likely the air filter; if the oil filter is clogged, it is usually accompanied by 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 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 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. Filter media that has been damp may look normal but strength has decreased; when installed, 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 that 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 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 for same position. Use this number in dusty sites |
| 24900433 | Oil Filter Element (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 (DRYER FILTER) | Only for units with refrigerated dryer configuration |
| 47784006001 | 4000h Standard Maintenance Kit | Includes 1 pc of this part + 1 pc oil filter element |
| 47784007001 | 4000h Maintenance Kit with Dryer | Includes this part + oil filter element + 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. Before purchasing, refer to the maintenance kit list in the parts manual supplied with the unit. Units with and without refrigerated dryers have different 4000-hour kit numbers; do not mix them.