Product
Ingersoll Rand 47557738001 Standard Air Filter | RS45i/55i/75i
Ingersoll Rand 47557738001 standard air filter element for RS45i, RS55i and RS75i rotary 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 intake air filter element used on Ingersoll Rand RS45i, RS55i and RS75i rotary 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. 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, two intake configurations exist: 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. 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 noticeably shorter. Check the site conditions before choosing 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 (use 24900318) |
| Installation Position | Between intake and main intake valve |
| Replacement Interval | 4000 hours under standard conditions; earlier in dusty environments based on differential pressure |
3. Technical Specifications
3.1 Filtration Performance (Core Indicators)
| Parameter | Value / Description |
|---|---|
| Filtration Rating | Approx. 3–10 μm, primarily capturing 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 ventilation/AC standards (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 the element and whether the correct grade was purchased; they are not acceptance criteria. For acceptance, check differential pressure.
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 settings |
| 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 not be replaced only when clogged; they should be replaced when they reach a certain point. When differential pressure rises from 0.3 kPa to 1.2 kPa, the machine still runs, but you are paying extra for electricity. 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 cost of the filter itself.
3.3 Dimensions and Installation Parameters
| Parameter | Value / Description |
|---|---|
| Dimensions | Depend on intake housing design; not listed here. Measure the old part. |
| Effective Filtration Area | Typically 1.5–4 m² for similar parts |
| Pleat Count / Pitch | 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; no threads or clamps |
| Seal Type | Soft gasket on end cap, formed by housing compression |
| 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 numbers 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 gasket, or polyurethane foam end caps | Also serve as seal carrier |
| Seal | Nitrile rubber (NBR) or polyurethane | Ensures no bypass at seat |
| Adhesive | Hot melt or polyurethane adhesive | Bonds end caps to media |
3.5 Operating Tolerance
| Parameter | Value / Description |
|---|---|
| Operating Temperature | Normal intake conditions, approx. −20 °C to +80 °C |
| Relative Humidity | Handles 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 drawings |
| 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 differential pressure, not fixed hours |
| Intermediate Inspection | Check filter surface and differential pressure every 2000 hours or quarterly |
| 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 about 2000 hours; this is conservative and can be used as an early margin 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 | Per 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; none 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 the 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 the rotor to turn during disassembly. Wait until the pressure gauge reads zero.
Step 2: Record differential pressure before replacement Before removal, read the current intake resistance from the panel or gauge and record it. This is the only basis for judging early or late replacement; once removed, it's gone. Also record the hour meter reading.
Step 3: Open intake housing, 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 prevent proper 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 leakage; the 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, seal face position. Check that 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 seat, insert vertically; do not tilt. After seating, press the outer ring to confirm contact, then install cover. Tighten evenly; do not tighten one side only, as uneven pressure can 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 pressure returns to new-element level (approx. 0.2–0.5 kPa). If pressure is high, first check installation; do not immediately suspect the element.
Step 8: Record Write hour meter reading, replacement date, old and new differential pressures, and part number in maintenance log. 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 fit the same position and look similar, but media and dust holding capacity differ. Standard parts are for normal intake environments; high-dust parts for sites with noticeably high dust. Installing the wrong one will not cause immediate failure, but the interval will be noticeably off.
Q2: My machine is RS45ie. Can I use this?
No. This part number corresponds only to RS45i, RS55i, RS75i. Units with IE or NE suffix use different intake part numbers. Read the full model on the nameplate before buying, 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 differential pressure: 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 margin 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, strength and efficiency both decrease.
Q6: Differential pressure is high right after installation. Is it the filter?
Check installation first. Residual old rubber on sealing surface, uneven cover tightening, or incomplete seating can cause high pressure. After ruling out these three, then suspect the element itself.
Q7: How to tell if the air filter or oil filter is clogged?
Look at two values: if intake negative pressure (or air filter differential) rises while discharge temperature remains stable, it's likely the air filter; a clogged oil filter usually comes with oil pressure changes and rising discharge temperature. Read both together for accuracy.
Q8: What else should be replaced along 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 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?
The difference mainly comes 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 energy and downtime costs.
Q10: Can it be used after long storage?
Under unopened, dry, dark conditions, use within 3 years. Moisture-affected media may look normal but strength is reduced; installation may cause 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; 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: Read the full model (including suffix) on the unit nameplate, then compare the part number in the intake section of parts manual 47612270. Both must match for this part.
7. Related Parts
The following are parts from the same family (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 (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 |
| 47784006001 | 4000h standard maintenance kit | Includes 1x this part + 1x 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. Before ordering, 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.