Ingersoll Rand 47742051001 Air Filter Element for MM350-2S Compressor

Product Overview

47742051001 is the intake air filter element for the Ingersoll Rand MM350-2S two-stage screw air compressor. It is fitted inside the external air filter housing, upstream of the airend intake. Ambient air passes through the element first; dust, grit and fibres are retained on the media surface and within its depth, so only clean air reaches the two-stage airend.

The duty context matters. The MM350-2S is a 350 kW two-stage unit delivering 64.1 m³/min at 8.5 bar(g) — an intake volume in the same order as single-stage machines of comparable power. That higher intake volume means the element processes more air per unit of time, so media area and structural rigidity must match. This is where this part differs from elements used on smaller machines.

Element condition directly affects airend life. Hard particles entering the two-stage rotor accelerate rotor and bearing wear and contaminate the downstream separator element, oil filter and lubricant. Severe blockage reduces intake volume, cutting delivered flow and raising specific power. For a continuously running megawatt-class unit, one unplanned stop costs far more than the filter itself.

Key Specifications

Item	Value
Part number	47742051001
Description	Air filter element
Brand	Ingersoll Rand
Application	MM350-2S two-stage screw compressor (350 kW)
Unit free air delivery	64.1 m³/min @ 8.5 bar(g)
Construction	Dry pleated element
Dimensions	Measure the old part
Filtration rating	5–10 μm
Recommended service interval	2,000 hours or 3 months

Technical Parameters

1. Filtration performance

Parameter	Value / note
Filtration rating	5–10 μm
Filtration efficiency	≥98% for particles ≥5 μm
Filter class	EN 779 ventilation filter classification does not apply; intake filters are characterised to ISO 5011 by efficiency, restriction and dust holding capacity
Dust holding capacity	—

2. Flow and restriction

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

Restriction and energy consumption

Rising intake restriction lowers intake pressure and density. To hold the set discharge pressure and flow, the unit must do more work and specific power rises. Calculated on a theoretical compression-ratio basis 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%

The MM350-2S is a 350 kW continuous-duty unit. At 8,000 running hours per year, energy consumption climbs by roughly 6% as an element goes from new to heavily blocked — an electricity cost far exceeding the price of a filter set. That is why large units should be serviced on restriction readings rather than the calendar alone.

3. Construction and installation

Parameter	Value / note
Dimensions	—
Construction	Dry pleated cartridge element
Effective filtration area	—
Pleat count / pitch	—
Mounting	Fits into the air filter housing, axially clamped
Sealing	Face compression seal (per physical part)

On dimensions: this part number belongs to a newer 11-digit series, and no reliable dimensional data is available from public OEM literature or third-party channels. Before ordering, measure the old element — outside diameter, inside (or mounting bore) diameter and overall height — or send photos and measurements for our verification. Do not cross-reference by unit power or visual similarity to another part number.

4. Materials

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

5. Operating tolerance

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 paper burst test)
Collapse resistance	Element must withstand the unit intake alarm differential without collapsing
Special features	No flame-retardant, anti-static or special coating designation for this model

6. Service life and storage

Parameter	Value / note
Service life	2,000 hours or 3 months, whichever comes first
High-dust environments	Follow the restriction reading; replace once it enters the alarm band
Shelf life	Approx. 2–3 years, unopened, dry and ventilated storage

7. Standards

Item	Detail
Product standard	ISO 5011 (intake air filters for internal combustion engines and compressors — performance testing), evaluated by efficiency, restriction and dust holding capacity
Commonly cited test standards	ISO 2941 / 2942 / 2943 / 3723 / 3724 / 3968
Standard applicability note	The ISO 29xx / 37xx series are general test methods for hydraulic transmission filter elements. If a supplier can only offer hydraulic filter standards, request ISO 5011 data or the OEM specification sheet.

Maintenance and Installation Steps

The external filter housing on a large two-stage unit is substantial; allow about 30–40 minutes per job and work in pairs.

1. Shut down, confirm zero pressure, lock out/tag out. Isolate the main power and apply lockout/tagout, then open the receiver drain valve to release pressure. Criterion: controller shows zero system pressure and no residual air flow is audible.
2. Open the air filter housing. Release the cover clamps or fasteners in a diagonal sequence. Criterion: cover undistorted, clamps not seized. Support a large cover before releasing the last fastener.
3. Remove the old element and inspect it. Pull the element straight out; use lifting assistance given its size and weight. Check dust distribution and media condition. Criterion: even grey-brown dust loading is normal; oily residue indicates oil carry-over upstream and needs investigation; torn media, debonded end caps or a flattened seal mean immediate replacement.
4. Clean the housing interior. Wipe the inner walls, base and sealing face with a dry lint-free cloth. Never blow compressed air into the housing — it drives dust into the intake tract. Criterion: no loose dust inside, sealing face flat with no pits. In humid regions also check for condensate at the housing base.
5. Verify the new element and fit it. Compare against the old part item by item: mounting diameter, overall height, seal dimensions and type. Once confirmed, seat the element fully with the seal face in contact and no trapped material. Criterion: element centred, no skew, even seal compression all round.
6. Refit and tighten the cover. Tighten clamps or bolts evenly in a diagonal sequence. Criterion: uniform cover-to-housing gap, no visible skew.
7. Start up and verify. Restore power, start the unit and read intake restriction after 5–10 minutes. Criterion: restriction within the new-element baseline band and no abnormal whistling at the intake (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 unit with the element unseated. Running without an element, or with an uncompressed seal, sends unfiltered air straight into the two-stage rotor and can cause irreversible wear in a short time.

FAQ

Which units use 47742051001?

The Ingersoll Rand MM350-2S two-stage screw compressor (350 kW, 8.5 bar(g), 64.1 m³/min), part of the SSR two-stage 350 kW platform.

Is the MM350-2S element the same as ML350-2S or MH350-2S?

The SSR 350 kW two-stage platform is split by discharge pressure into four models: ML (7.5 bar), MM (8.5 bar), MH (10 bar) and MXU (14 bar). This part corresponds to the MM350-2S. Whether other pressure ratings share the same element must be confirmed against the unit nameplate and the accompanying parts manual — do not assume interchangeability.

How often should it be replaced?

The recommended interval is 2,000 hours or 3 months, whichever comes first. More accurately, follow the intake restriction reading and schedule replacement once it enters the alarm band. In dusty sites, replace on restriction rather than waiting for the calendar.

Can I blow it clean and reuse it?

No. This is a dry, single-use element designed not to be washed. Reverse blowing with compressed air only removes surface dust; fine particles embedded in the depth cannot be cleared, and the air pressure can rupture fibres or distort pleat spacing, creating paths invisible to the eye. A cleaned element looks fine but has lost its efficiency — the risk outweighs any saving.

Why is timely replacement critical on this unit?

The MM350-2S is a 350 kW continuous-duty machine. Each 1 kPa rise in intake restriction adds roughly 1% to energy consumption; from new to heavily blocked, consumption climbs about 6% in total. At 8,000 running hours per year, that electricity cost far exceeds a filter set. Unfiltered air also contaminates the two-stage rotor, separator element and lubricant at the same time. It is one of the highest-return maintenance items on the unit.

How do I confirm the element will fit?

Three steps: (1) check the unit nameplate to confirm MM350-2S; (2) measure the mounting diameter and overall height of the old element and compare with the new part; (3) if the old element has been discarded, provide the model marking on the air filter housing and we will trace it back through the unit.

What else should be checked during an air filter change?

Intake hose and clamps (cracks, ageing, looseness), the housing sealing face, the intake restriction indicator (does the needle return correctly), and the oil filter and separator element on the same service cycle. Bypass leakage is as damaging as running without an element, so the hose check is not optional.

Is this part in stock, and what is the lead time?

Regular stock items ship within 24 hours. Approximate 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 this a genuine OEM part?

47742051001 is the Ingersoll Rand OEM part number. Always order against the part number itself — it is the only identifier that cannot be confused. Do not order on the basis of "fits a 350 kW unit" or visual similarity alone.

Why are dimensions not listed?

This part number belongs to a newer 11-digit series and no reliable dimensional data is publicly available. To avoid supplying the wrong size, this page gives no estimated figures. Measure the old element's outside diameter, mounting bore and overall height before ordering, or contact us for verification — this step matters more than saving time.

Compatible Models

This part suits the MM model 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	Model covered on this page

Other pressure ratings on the same platform (for identification and to avoid 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, ultra-high-pressure version

About the SSR two-stage 350 kW platform

This is Ingersoll Rand's two-stage screw compressor series, using integrated gear drive and digital control. The unit measures approximately 4,000 × 1,930 × 2,146 mm and weighs about 7,600 kg — a large continuous-duty industrial machine. Within one power rating it is split by discharge pressure into ML / MM / MH / MXU models. Air filter configuration for other pressure ratings must be confirmed against the unit nameplate; this page makes no fitment claim for those models.

Reading the table

• This product corresponds to row 1, MM350-2S.
• If your unit is an ML350-2S, MH350-2S or MXU350-2S, send us the nameplate model and we will verify the correct air filter part number separately.
• If the nameplate is unclear, reading the part number on the old element is the most reliable confirmation.

Related Components

In the intake and lubrication system of the MM350-2S, the following parts are serviced on the same cycle or should be checked together. For specific part numbers, refer to the unit's accompanying parts manual.

Component	Location	Function	Check points
Oil filter element	Main oil circuit	Removes wear debris and sludge from lubricant, protecting the two-stage rotor and bearings	Replace on the same cycle as the air filter; check the housing sealing face for oil seepage afterwards
Separator element	Oil separator tank	Separates oil mist from compressed air and returns oil, controlling oil carry-over	Also check the oil return line for blockage (poor return directly causes high oil carry-over)
Intake restriction indicator / intake vacuum alarm	Air filter housing or controller	Indicates element blockage and is the authoritative basis for replacement timing	Check the needle returns correctly and the sensing line is clear; if faulty, service on the conservative interval
Intake hose and clamps	Between filter housing and airend intake	Keeps the intake path leak-free with no unfiltered air bypass	Check for cracks, ageing and looseness; bypass leakage is as damaging as running without an element
Housing sealing face and cover	Air filter housing	Ensures reliable sealing once the element is clamped	Check for pits and corrosion; check the cover for distortion
Lubricant	Airend lubrication system	Lubrication and sealing; two-stage models have demanding oil requirements	Test and change oil to the unit's schedule; do not mix grades
Air filters for other pressure ratings on the same platform	—	Filter part numbers for ML350-2S / MH350-2S / MXU350-2S	Distinguish by model when stocking and ordering; do not assume commonality by power rating

Grouped replacement advice: on large two-stage units, schedule the air filter, oil filter and separator element in the same shutdown to avoid staggered service intervals and repeated downtime. In dusty sites, fit a high-dust pre-cleaner first — the pre-cleaner costs far less than the main element and is quicker to change.