Ingersoll Rand MM350-2S Air Filter Element 47742049001 | 350 kW OEM

Product Overview

47742049001 is the intake air filter element for the Ingersoll Rand MM350-2S two-stage screw air compressor. It sits inside the external air filter housing, upstream of the airend intake. Dust, grit and fibres are captured on the media surface and in its depth, so only clean air reaches the two-stage rotor set.

One point deserves emphasis before you order. The MM350-2S intake system does not use a single filter part number. Filter configuration varies with machine version and build, and several intake filter part numbers run in parallel for the same model. This page therefore makes no assumption that one element covers the whole machine. Always read the part number moulded or printed on the old element and confirm its installed position rather than ordering on machine model alone — this is the most common purchasing error with high-power compressor consumables.

Duty context: the MM350-2S is a 350 kW two-stage machine delivering 64.1 m³/min at 8.5 bar(g), a high-volume intake duty. The element handles far more air per hour than mid-size machines, so media area and structural rigidity must match.

Key Specifications

Item	Value
Part number	47742049001
Product name	Air filter element
Brand	Ingersoll Rand
Application	MM350-2S two-stage screw compressor (350 kW)
Machine free air delivery	64.1 m³/min @ 8.5 bar(g)
Construction	Dry pleated element
Dimensions	Confirm by measuring the old element
Filtration rating	5–10 μm
Recommended change interval	2,000 hours or 3 months

Technical Data

Filtration performance

Parameter	Value / note
Filtration rating	5–10 μm
Filtration efficiency	≥98% for particles ≥5 μm
Filter classification	Not classified under ventilation filter standards (EN 779); intake filters are characterised by efficiency, intake restriction and dust holding capacity per ISO 5011
Dust holding capacity	—

Flow and restriction

Parameter	Value / note
Rated air flow	Matched to MM350-2S intake volume (machine FAD 64.1 m³/min @ 8.5 bar)
Initial pressure drop	Approx. 0.5–1.0 kPa (approx. 50–100 mmH₂O)
Operating differential range	From new-element baseline to clogging alarm value
Alarm / final restriction	Per the machine intake restriction indicator or controller vacuum alarm
Restriction vs. energy	Each 1 kPa rise in intake restriction adds roughly 1% to machine energy consumption

Restriction and energy consumption. Rising intake restriction lowers intake pressure and air density; the machine must work harder to hold set discharge pressure and flow, so specific power rises. Calculated on compression ratio at 0.8 MPa discharge and 101.3 kPa atmospheric:

Intake restriction	Compression ratio	Relative energy increase
0 kPa (new element)	8.90	Baseline
2 kPa	9.08	+2.0%
4 kPa	9.26	+4.1%
6 kPa	9.45	+6.2%

Practical implication: the MM350-2S is a 350 kW continuous-duty machine. Over 8,000 running hours a year, energy consumption climbs roughly 6% between a new element and a heavily clogged one — electricity cost far exceeds the price of the element. Change large-machine elements on intake restriction, not on the calendar.

Construction and materials

Parameter	Value / note
Media	Imported wood-pulp filter paper (industry-common HV or Ahlstrom grades)
Media weight	Approx. 130 g/m²
Inner / outer support	Galvanised perforated steel cage (inner cage plus outer guard)
End caps	Metal end caps (galvanised steel) bonded with polyurethane adhesive
Sealing	Face seal ring (oil-resistant rubber)
Bonding	Polyurethane (PU) hot-melt adhesive

Operating limits and service life

Parameter	Value / note
Operating temperature	−10 to +100 °C
Relative humidity	≤80% RH, no condensation
Burst strength	Media burst strength approx. 200–400 kPa (per ISO 2758)
Collapse resistance	Element must withstand machine intake alarm differential without collapsing
Service life	2,000 hours or 3 months, whichever comes first
High-dust sites	Change when the restriction reading enters the alarm band
Shelf life	Approx. 2–3 years, unopened, dry and ventilated storage

Applicable standards

Item	Content
Product standard	ISO 5011 — intake air filters for engines and compressors: efficiency, intake restriction and dust holding capacity
Commonly cited test standards	ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968
Note on applicability	The ISO 29xx / 37xx series are general test methods for hydraulic filter elements. Where a supplier can only cite hydraulic filter standards, request ISO 5011 data or the OEM specification sheet.

Installation Steps

External filter housings on large two-stage machines are bulky; allow 30–40 minutes and work in pairs.

1. Shut down, confirm zero pressure, lock out and tag out. Isolate the main supply and lock out. Open the receiver drain valve to vent. Criterion: controller shows 0 system pressure and no residual air flow noise.
2. Verify the part number before touching anything. Criterion: read the number on the old element and compare digit by digit with the number you are buying — never rely on part name or machine model alone. Where several intake filter numbers exist for one model, fitting the wrong position causes poor sealing or prevents seating altogether.
3. Open the air filter housing. Release the end-cover clips or bolts in diagonal sequence. Criterion: cover undistorted, clips not seized. Support large covers until the last fastener is released.
4. Remove the old element and assess its condition. Pull it out vertically, using lifting assistance given its size and weight. Criterion: uniform grey-brown dust loading is normal; oily residue indicates upstream oil carryover and needs investigation; torn media, debonded end caps or a flattened seal mean immediate replacement.
5. Clean the housing interior. Wipe the inner walls, base and sealing face with a dry lint-free cloth. Do not blow compressed air into the housing — it drives dust into the intake tract. Criterion: no loose dust, sealing face flat with no pitting. In humid regions also check the housing base for condensate.
6. Fit the new element and confirm seating. Compare mounting diameter, overall height and seal type against the old element, then push fully home with the seal seated and no trapped material. Criterion: element centred, no tilt, even compression marks around the seal.
7. Refit and tighten the cover. Tighten clips or bolts evenly in diagonal sequence. Criterion: uniform gap between cover and housing, no visible tilt.
8. Start up and verify. Restore power and run 5–10 minutes, then read intake restriction. Criterion: restriction within the new-element baseline band and no abnormal whistling at the intake (unusual noise usually means the seal is not compressed or the element is not seated). Log the date, running hours and restriction reading.

Non-negotiable rule: never start the machine before the element is seated. Running with no element, or with an uncompressed seal, sends unfiltered air straight into the two-stage rotors and can cause irreversible wear in a short time.

FAQ

Which machines use 47742049001?
Ingersoll Rand MM350-2S two-stage screw compressors — 350 kW, 8.5 bar(g), 64.1 m³/min.

Is this the only intake filter number for the MM350-2S?
No. This model uses several intake filter part numbers in different positions. That is why this page repeats the instruction to verify the number on the old element — ordering on machine model alone is the most frequent error with this platform.

How do I confirm which element I need?
Three steps: (1) read the part number on the old element and compare digit by digit; (2) note its installed position (which stage, which side); (3) if the old element has been discarded, supply the machine nameplate and filter housing markings so we can cross-check against the build configuration. Do not judge by appearance alone.

How often should it be changed?
Recommended interval is 2,000 hours or 3 months, whichever comes first. More accurately, change on the intake restriction reading — once it enters the alarm band, schedule replacement. High-dust sites should change earlier on restriction.

Can I blow it clean and reuse it?
No. This is a dry single-use element and is not designed to be washed. Compressed-air back-blowing only removes surface dust; fine particles embedded in the media stay, and the pressure can fracture fibres or distort pleat spacing, creating invisible channels. A washed element looks clean but has lost efficiency, so the risk outweighs any saving.

Why is timely replacement critical on this machine?
The MM350-2S is a 350 kW continuous-duty unit. Each 1 kPa of extra intake restriction adds roughly 1% to energy consumption; from new to heavily clogged the cumulative rise is about 6%, and over 8,000 hours a year the electricity cost far exceeds the price of an element. Unfiltered air also contaminates both rotor stages, the separator element and the lubricant. This is one of the clearest return-on-investment service items on the machine.

What else should be checked during an air filter change?
Intake hoses and clamps (cracks, ageing, looseness), the housing sealing face, the intake restriction indicator (does the needle return freely), and the oil filter and separator element on the same service interval. Bypass leakage is as damaging as running without an element, so the hose check is not optional.

Is it in stock and what is the lead time?
Regular stock items ship within 24 hours. Typical transit: Southeast Asia 3–7 days, Middle East 7–10 days, Africa and Latin America 10–18 days, Russia/Belarus 10–15 days. Confirm against stock and sailing schedule at the time of enquiry.

Is it a genuine part?
47742049001 is the Ingersoll Rand OEM part number. Always order against the part number itself — it is the only identifier that cannot be confused.

Why are dimensions not listed?
This number sits in a newer 11-digit range and no reliable published dimensions are available. To avoid a wrong-size order, this page does not quote estimates. Measure the old element's outside diameter, mounting bore and overall height before ordering, or contact us for verification.

Compatible Machine

This element applies to MM-series machines in the Ingersoll Rand SSR two-stage 350 kW platform.

No.	Model	Nominal power	Discharge pressure	Free air delivery	Note
1	MM350-2S	350 kW	8.5 bar(g)	64.1 m³/min	Machine covered by this page

Other pressure ratings on the same platform (for identification and to rule out mis-purchase)

Model	Discharge pressure	Free air delivery	Note
ML350-2S	7.5 bar(g)	69.2 m³/min	Same power platform, low-pressure version
MH350-2S	10 bar(g)	59.5 m³/min	Same power platform, high-pressure version
MXU350-2S	14 bar(g)	50.2 m³/min	Same power platform, extra-high-pressure version

⚠️ More than one intake filter number applies to this model. The MM350-2S air filter uses multiple elements according to build configuration, each with its own part number. This page covers one of those numbers only and makes no compatibility claim for the others. Confirm before ordering:

1. Preferred: read the part number on the old element and compare digit by digit.
2. Alternative: record the installed position (which stage / which side) and supply a nameplate photo; we cross-check against the build configuration.
3. Fallback: measure the old element's outside diameter, mounting bore and overall height and compare by size.

• This page corresponds to row 1, MM350-2S.
• If your machine is an ML350-2S, MH350-2S or MXU350-2S, send the nameplate model and we will verify the intake filter number separately.
• Matching machine model does not mean a shared element — intake filter part numbers for one model are not interchangeable.

Related Parts

The items below sit in the intake and lubrication systems of the MM350-2S and are commonly checked or replaced on the same interval. For specific part numbers, refer to the machine parts manual.

Part	Location	Function	Inspection point
Other intake filter elements for the same model	Inside the air filter housing	Correspond to the machine's filter configuration; part numbers differ from this page	Separate by part number when stocking and ordering — never assume interchangeability by model
Oil filter element	Main oil circuit	Removes wear debris and sludge from the lubricant, protecting both rotor stages and bearings	Change on the same interval as the air filter; check the housing seal face for weeping afterwards
Separator element	Oil separator tank	Separates oil mist from compressed air and returns oil, controlling discharge oil carryover	Check the return line for blockage at the same time — poor return flow directly raises oil carryover
Intake restriction indicator / vacuum alarm	Air filter housing or controller	Indicates element clogging and is the authoritative basis for replacement timing	Check needle return and sensor line clearance; if faulty, revert to a conservative interval
Intake hoses and clamps	Between filter housing and airend intake	Keep the intake path leak-free with no unfiltered bypass	Check for cracks, ageing and looseness — bypass leakage is as damaging as no element
Housing sealing face and end cover	Air filter housing	Ensure reliable sealing once the element is compressed	Check for pitting and corrosion; check the cover for distortion
Lubricant	Airend lubrication system	Lubrication and sealing; two-stage machines demand higher oil quality	Test and change the oil to the machine specification; avoid mixing grades

Grouped replacement advice: on large two-stage machines, schedule the air filter, oil filter and separator element into one shutdown to avoid staggered intervals and repeated downtime. In dusty locations, fit a high-dust pre-cleaner first — pre-cleaner cost is far below the main element and replacement is quicker.

For quotation, datasheet or stock confirmation, send us the old element part number, its installed position and a machine nameplate photo. We will verify against the build configuration before shipment.