Ingersoll Rand MM350-2S Air Filter Element 47742051001

Product Overview

47742051001 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. Incoming air passes through the element first, so dust, sand and fibres are trapped on the media surface and in its depth — only clean air reaches the two-stage airend.

The duty context matters. The MM350-2S is a 350 kW two-stage machine with a free air delivery of 64.1 m³/min at 8.5 bar(g), so intake volume is on the scale of a single-stage unit of the same power. Higher intake volume means the element handles more air per unit of time; media area and structural rigidity must match. This is where this part differs from elements built for smaller machines.

Element condition directly affects airend life. Unfiltered air carries hard particles that accelerate rotor and bearing wear and contaminate the downstream separator element, oil filter and lubricant. Severe blockage reduces intake volume, cutting delivery and raising specific power. For a continuously running machine of this size, one unplanned stop costs far more than the element itself.

Core Specifications

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

Technical Parameters

Filtration performance

Parameter	Value / note
Filtration rating	5–10 μm
Filtration efficiency	≥98% for particles ≥5 μm
Filter class	HVAC classification (EN 779) does not apply; intake elements are characterised under ISO 5011 by efficiency, restriction and 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)
Alarm / final restriction	Per the machine intake restriction indicator or controller vacuum alarm
Restriction vs. energy	Each 1 kPa of intake restriction adds roughly 1% to machine energy consumption

Rising intake restriction lowers intake pressure and density. To hold the set discharge pressure and flow, the machine must do more work, so specific power rises. Calculated on a 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%

What this means in practice: on a 350 kW machine running 8,000 hours a year, energy consumption can rise by roughly 6% between a new element and a heavily blocked one. The resulting electricity cost far exceeds the price of a replacement element — which is why large machines should be serviced on restriction readings, not on the calendar alone.

Construction and materials

Parameter	Value / note
Media	Imported wood-pulp filter paper (industry-common grades such as HV or Ahlstrom)
Media weight	Approx. 130 g/m²
Inner and outer support	Galvanised punched steel cage plus outer guard mesh
End caps	Metal end caps (galvanised steel) bonded with polyurethane adhesive
Sealing	End-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 the machine intake alarm differential without collapsing
Service life	2,000 hours or 3 months, whichever comes first
Dusty environments	Change on restriction readings — replace as soon as the alarm range is reached
Shelf life	Approx. 2–3 years, unopened, dry and ventilated storage

Applicable standards

Item	Detail
Product standard	ISO 5011 (intake air filters for engines and compressors — performance testing: efficiency, restriction, 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. If a supplier can only offer hydraulic filter standards, ask for ISO 5011 data or the OEM specification sheet.

Installation and Maintenance Steps

The external filter housing on a large two-stage machine is bulky; allow roughly 30–40 minutes and work with two people.

1. Shut down, confirm zero pressure, lock out/tag out. Isolate the main power and lock out. Open the receiver drain valve to release pressure. Check: controller shows 0 system pressure and no residual air flow is audible.
2. Open the air filter housing. Release the housing cover latches or bolts in a diagonal sequence. Check: cover not deformed, latches not seized. Support the cover before the last fastener is released.
3. Remove the old element and inspect it. Pull the element straight out; use lifting assistance given its size and weight. Check: even grey-brown dust loading is normal. Oily residue on the surface points to oil carryover 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. Do not blow compressed air into the housing — it drives dust into the intake tract. Check: no loose dust, sealing face flat with no dents. In humid locations, also check for condensate at the housing base.
5. Verify the new element and fit it. Compare against the old part: mounting diameter, overall height, seal face dimensions and type. Push the element fully home so the seal contacts evenly with no trapped material. Check: element centred, no tilt, even compression marks around the seal.
6. Refit and tighten the cover. Tighten latches or bolts evenly in stages, in a diagonal sequence. Check: even gap between cover and housing, no visible tilt.
7. Start up and verify. Restore power and start the machine. After 5–10 minutes, read the intake restriction. Check: restriction within the new-element baseline range and no abnormal whistling at the intake (noise usually means the seal is not compressed or the element is not seated). Record the date, running hours and restriction reading.

Non-negotiable rule: never start the machine with the element removed or the seal uncompressed. That sends unfiltered air straight into the two-stage airend and can cause irreversible wear in a short time.

Frequently Asked Questions

Which machines use 47742051001?
The Ingersoll Rand MM350-2S two-stage screw compressor — 350 kW, 8.5 bar(g), 64.1 m³/min. The model belongs to the SSR two-stage 350 kW platform.

Is the air filter the same as on 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 machine nameplate and the parts manual supplied with the unit — do not assume interchangeability.

How often should it be replaced?
The recommended interval is 2,000 hours or 3 months, whichever comes first. A more accurate approach is to read intake restriction and replace once it enters the alarm range. In dusty sites, replace earlier on restriction rather than waiting for the calendar.

Can the element be blown clean and reused?
No. This is a dry, single-use element and is not designed to be washed. Reverse blowing with compressed air only removes surface dust; fine particles embedded in the media stay in place. Blow pressure can also fracture fibres or distort pleat spacing, creating paths invisible to the eye. A cleaned element is a case of looking clean while actually being failed — the risk outweighs any saving.

Why is timely replacement so important on this machine?
The MM350-2S runs continuously at 350 kW. Each 1 kPa of intake restriction adds about 1% to energy consumption; from a new element to a heavily blocked one, consumption can rise by roughly 6%. Over 8,000 running hours a year, that electricity cost far exceeds a set of elements. Unfiltered air also contaminates the two-stage airend, separator element and lubricant at the same time.

How do I confirm the element will fit?
Three steps: (1) check the machine 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 cross-check against the machine.

What else should be checked when changing the air filter?
The intake hose and clamps (cracks, ageing, looseness), the housing sealing face, the intake restriction indicator (does the needle return properly), and the oil filter and separator element due on the same interval. 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. Transit is approximately 3–7 days to Southeast Asia, 7–10 days to the Middle East, 10–18 days to Africa and Latin America, and 10–15 days to Russia/Belarus. Confirm current stock and sailing schedules at the time of enquiry.

Is this a genuine 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 — rather than ordering on "fits a 350 kW machine" or visual similarity alone.

Why are dimensions not listed?
This is a newer 11-digit part number and no reliable dimensional data is available in public sources. To avoid quoting an incorrect size, this page does not provide estimates. Measure the old part's outer diameter, mounting bore and overall height before ordering, or contact us for verification — this step matters more than saving time.

Compatible Machine

This element is specified for the MM model in the Ingersoll Rand SSR two-stage 350 kW platform.

No.	Model	Nominal power	Discharge pressure	FAD	Note
1	MM350-2S	350 kW	8.5 bar(g)	64.1 m³/min	Covered by this page

Other pressure ratings on the same platform, listed for identification and to prevent mis-ordering:

Model	Discharge pressure	FAD	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

The SSR two-stage 350 kW platform is Ingersoll Rand's two-stage screw compressor range with integrated gear drive and digital control. Typical machine dimensions are approximately 4,000 × 1,930 × 2,146 mm with a total weight of around 7,600 kg — a large, continuously running industrial unit. Within the same power rating the range is split by discharge pressure into ML / MM / MH / MXU, and the air filter configuration for each pressure rating must be confirmed against the machine nameplate. This page makes no fitment claim for the other pressure ratings.

• This product corresponds to row 1 above, MM350-2S.
• If your machine 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 items share the same service interval or should be inspected at the same time. For specific part numbers, refer to the parts manual supplied with the machine.

Component	Location	Function	Inspection points
Oil filter element	Main oil circuit	Removes wear debris and sludge from the lubricant, protecting the two-stage airend and bearings	Replace on the same interval as the air filter; after replacement check the housing seal face for weeping
Separator element	Oil separator tank	Separates oil mist from the compressed air and returns oil, controlling oil carryover	On replacement, also check the return line for blockage — poor return flow directly causes high oil carryover
Intake restriction indicator / vacuum alarm	Air filter housing or controller	Indicates element blockage and is the authoritative basis for replacement timing	Check that the needle returns properly and the sensing line is clear; if failed, revert to a 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 seal face and cover	Air filter housing	Ensures a reliable seal once the element is compressed	Check for dents and corrosion pitting; check the cover for deformation
Lubricant	Airend lubrication system	Lubrication and sealing; two-stage machines place higher demands on oil quality	Test and change the oil to the machine's specified interval; do not mix grades
Air filters for other pressure ratings	—	Part numbers for ML350-2S / MH350-2S / MXU350-2S	Keep models separate when stocking and quoting — do not assume interchangeability by power rating

Grouping maintenance: on large two-stage machines, plan the air filter, oil filter and separator element into a single shutdown to avoid staggered intervals and repeated downtime. In dusty sites, fit a high-dust pre-cleaner first — pre-cleaners cost far less than the main element and are quicker to change.