Medical & Laboratory Equipment
One-Stop EC Fan Platform
For medical and laboratory equipment OEMs — two EC platforms mapped across 10 equipment classes: LWBE3G EC backward-curved centrifugal and LWAE3G EC axial, with the LWAD compact DC axial and RDH-R centrifugal lines covering the classes the two EC platforms do not reach. Evidence first — curve, drawing and file scope checked per model before any performance claim.
Why LONGWELL in Medical & Laboratory · 4 Unique Advantages
A fan inside medical equipment decides three things the device manufacturer is judged on: acoustic comfort, thermal stability and service life. LONGWELL's four advantages are built around the evidence a regulated programme has to show — not around a headline efficiency number.
One EC Platform, Ten Enclosures
From compact unit that fits a bench analyser to the 630 mm FFU impeller that carries a cleanroom ceiling grid, the LWBE3G backward-curved platform spans different airflow with 0-10 V / PWM / Modbus control. For two frame sizes, 225 mm and 250 mm, we hold medical-industry application records that can be reviewed per project.
Axial Duty for the Other Air Path
Every chiller and cleanroom has a second air path — condenser heat rejection, isolation-room exhaust, oven circulation, cabinet transfer. The LWAE3G EC axial platform operates at low static, IP54/IP55, 0-10 V/PWM with tacho output, locked-rotor and reverse protection.
A Cleanroom Reference You Can Read
800 FFU units on a 600 × 600 mm ceiling grid plus 60 axial units for negative-pressure isolation exhaust — the mRNA fill-finish reference case is published in full, including where the figures are modelled rather than measured. It describes a composite build pattern, not one named installation.
Evidence Before Claims
Wind tunnel testing to the AMCA 210 method, semi-anechoic sound power testing, outgoing sampling to AQL 2.5, test records retained 5 years. Certificate scope and file coverage are verified per model and destination, never transferred from a management-system certificate.
To Our Medical Device OEM Partners
To medical device engineering, quality and procurement leaders:
Fans are rarely the reason a device programme is launched, and often the reason it slips. Acoustic complaints, thermal drift in an analyser, a condenser that cannot hold operating temperature in a Gulf summer — all of them land on the same small component, late in validation, when the enclosure is frozen.
Medical and laboratory equipment adds one burden that consumer programmes do not: documentation. A curve is not enough. You need the file number, the standard, the model list the file actually covers, and a supplier who says plainly where the scope ends. We would rather hand you a smaller claim with a file number behind it than a larger claim that collapses in your regulatory review.
This pack documents two EC platforms, ten equipment classes, the cleanroom reference case, and the engagement paths we run with OEM programmes. Send us the duty point; we answer with a model, a curve, a drawing and the documents that belong to that part number.
What a Fan Has to Survive Inside Medical Equipment
Six requirements repeat across imaging, laboratory and patient-care equipment. Each one changes the model selection, and each one is checked on the curve — not on a catalogue maximum.
| Requirement | Why it matters in the device | How LONGWELL answers it |
|---|---|---|
| Continuous duty | Chillers, analysers and incubators run 24/7; a bearing failure is a service call on a clinical device. | Maintenance-free ball bearings, S1 continuous operation, model-specific life data issued with the proposal. |
| Acoustics | Noise is patient comfort and staff concentration; mammography and ward equipment sit next to the patient. | Sound power measured in a semi-anechoic room and reported per model; lower-speed EC variants cut blade-passing tone in imaging rooms and night wards — the acoustic limit and measurement distance are stated in the brief. |
| Thermal stability | Sensors in blood gas analysers and imaging chains drift when inlet temperature moves. | Duty-point selection against measured airflow and static pressure, with margin stated on the curve. |
| Compact envelope | Gantries and bench-top analysers leave little depth behind the air path. | LWBE3G EC backward-curved 190-630 mm for ducted internal paths; LWAE3G EC axial 200-900 mm for low-static transfer; LWAD DC axial 25-200 mm where the enclosure is smaller still. Envelope checked on the drawing. |
| Documentation | Regulatory review needs the file, the standard and the model list the file covers. | ETL Recognized Component (Intertek 5022563) covers listed LWBE3G / LWDE3G / LWFE3G models; UL File E552586 covers the LWFA2E120 blower variants. Scope verified per part number and destination. |
| Supply continuity | Medical programmes outlive most component cycles; re-qualification is expensive. | Yuyao/Ningbo manufacturing, 35 years of fan and motor production, samples of stock models in 1-3 days, production 15-30 days. |
Key Engineering Conclusion — Medical fan selection is a documentation exercise as much as an aerodynamic one. The right sequence is duty point, then envelope, then file scope: a fan that fits the curve but not the file will fail qualification, and a fan with a file but the wrong duty point will fail the device.
10-Class Equipment Architecture & Platform Mapping
Ten equipment classes, each with its own envelope, voltage, acoustic and reliability constraints. The table maps every class to the LONGWELL platform that fits it; the released models behind each platform are listed in §2.
| Equipment class | What the fan does in the device | LONGWELL fit |
|---|---|---|
| Blood gas analysers | Holds the sensor block at a stable temperature so results repeat in the shortest measurement time | Compact DC axial — LWAD cooling-fan frames, 25 to 200 mm |
| Medical chillers (MRI / CT) | Two paths: condenser heat rejection outside, circulation through coil and filter inside | LWAE3G EC axial for the condenser · LWBE3G centrifugal, bracket-mounted build, for the internal static path |
| CT & MRI gantries | Continuous cooling at up to 20,000 m³/h centrifugal and up to 725 cfm axial, in a compact envelope | LWBE3G up to 630 mm for the volume path · LWAE3G Ø200 for the auxiliary path |
| Mammography devices | Cooling beside the patient, where noise is part of the examination experience | Low-noise EC axial LWAE3G Ø200 · compact LWAD for local electronics |
| Biological safety cabinets | Holds pressure conditions and even airflow so samples and operator stay protected | RDH-R belt-driven backward-inclined double-inlet centrifugal |
| Cleanroom FFU & isolation | Ceiling-grid supply at uniform face velocity, plus negative-pressure exhaust | LWBE3G for the FFU grid · RDH-R for the central high-pressure plant · LWAE3G for exhaust |
| Disinfection devices | Drives air through the UV chamber and cools the electronics on a separate path | Compact DC axial — same LWAD platform on both paths |
| Centrifuges | Removes frictional heat from a chamber that is already under mechanical stress | Compact DC axial, speed-controlled to the duty |
| Hospital beds & warming systems | Comfort airflow around the clock, inaudibly; warming systems add a high-speed blower stage | Compact DC axial covers the comfort path |
| Drying cabinets & laboratory ovens | Even circulation under sustained heat | EC axial — duty checked against the stated chamber temperature |
Platform names above describe the LONGWELL line that fits each class — the released models behind each platform, and the lines that sit outside our current range, are set out below and in §2. Selection is confirmed on the P-Q curve at your operating point.
Imaging & Diagnostics
Chillers · CT/MRI · Mammography · Drying cabinets & ovens
The widest spread in the whole segment: condenser heat rejection outside, stable cooling inside, silence where the patient lies — and, in drying cabinets and laboratory ovens, even circulation under sustained heat. All four duties sit on the same two EC platforms.
Compact Electronics Cooling
Blood gas analysers · Disinfection · Centrifuges · Beds
Four classes, one answer: a compact DC axial in the 25-200 mm frame range. What changes between them is voltage and speed grade — 12 / 24 / 48 V, 1,500 to 5,500 rpm — and the acoustic target of the room the device sits in.
Containment
Biological safety cabinets
Safety cabinets are a pressure-stability problem, not a volume problem. The fan has to hold a setpoint against a loading filter, which is why the belt-driven backward-inclined RDH-R range — not a compact axial — is the fit here.
Clean Environment
Cleanroom FFU · Negative-pressure isolation
Two fans in one contamination-control strategy: the ceiling grid that holds face velocity, and the exhaust that holds the pressure cascade. The FFU grid is an LWBE3G job; the central plant behind it is often RDH-R.
Outside the Current Range
High-speed blowers · Ventilator gas paths · Above the LWAE3G temperature envelope
Blowers running at 40,000 rpm and above for breathing circuits, ventilator and CPAP gas paths, and chamber circulation at temperatures above the LWAE3G operating envelope. Please contact us
Why a medical chiller needs two air paths, not one
A chiller moves heat twice: once through the condenser, where a large axial fan shifts high volume at low pressure, and once inside the cabinet, where a centrifugal fan has to push through filters, coil and ducting. Sizing both from one airflow number is the most common reason a chiller cannot hold its setpoint in high ambient. That is why the two LONGWELL platforms are split this way: LWAE3G handles the low-static condenser path, LWBE3G handles the high-static internal path. Send both duty points and both envelopes.
Scope note: the two platforms above are selected for the airflow job described. Operating temperature, ingress protection and mechanical loads are confirmed per model before a proposal.
Explore the LONGWELL axial family →
Share your equipment and air-path requirements →
"In medical equipment the fan is a regulated component. The file, the curve and the enclosure have to agree — in that order."
— LONGWELL Medical & Laboratory Engineering Note, 2026 Q3
Two EC Platforms · Plus the Two Lines That Cover the Rest
LWBE3G carries every ducted, high-static air path inside the equipment; LWAE3G carries the low-static volume path — condenser, exhaust, transfer. Catalogue figures are duty-point ratings; the final model is checked on its P-Q curve.
★ LWBE3G EC Backward-Curved Centrifugal — The Inside-Cabinet Platform
190-630 mm EC backward-curved centrifugal for gantry cooling, analyser internals, safety cabinets, centrifuges and cleanroom FFU. Lower-speed variants keep noise down; higher-pressure variants carry ducted internal paths. For the 225 mm and 250 mm frames we hold medical-industry application records; nothing on this page should be read as a medical approval of a catalogue model.
225 mm & 250 mm · medical-industry application records held
These are standard-platform models with prior medical-industry use we can evidence on request. Suitability for your device is confirmed against your specification, not inferred from the listing.
| Model | Frame | Voltage | Series range | Protection & range |
|---|---|---|---|---|
| LWBE3G225-092NS-13 EC backward-curved centrifugal | 225 mm | 230 V · 50/60 Hz | 1,009-1,630 m³/h · 80-315 W · noise 65-71 dB | IP55 |
| LWBE3G250-102PS-28 EC backward-curved centrif. · with bracket (engineering) | 250 mm | 230 V | Bracket-mounted engineering build | IP54 / IP44 · -25 to +60 °C |
Same-platform models in the same two frames, available on the same basis: LWBE3G225-072PS-01 / -072PS-02 / -072PS-03 / -092PS-04 (225 mm) · LWBE3G250-072PS-15 / -092PS-16 / -072PS-17 / -092PS-21 (250 mm).
Applicability boundary: A catalogue entry states what the fan does in air. Whether a given model is acceptable inside a medical device rests on the device specification — insulation class and creepage, media compatibility, EN 60601-1-2 EMC behaviour in your enclosure, cleanability, and the risk assessment your 60601-1 file has to carry. We confirm each of those against your drawing and issue the supporting documents per project. None of them is granted by the listing above.
Platform coverage · selected duty points
| Model | Size | Voltage | Airflow | Static pressure | Input power |
|---|---|---|---|---|---|
| LWBE3G190-072NS-07 | 190 mm | 230 V | 639 m³/h | 453 Pa | 64 W |
| LWBE3G190-072NS-13 3,300 rpm · Class B · IP55 · CE / EAC / UL marked | 190 mm | 230 V · 50/60 Hz · 0.65 A | — | — | 87 W |
| LWBE3G225-072NS-11 | 225 mm | 230 V | 1,009 m³/h | 618 Pa | 85 W |
| LWBE3G280-092PS-03 | 280 mm | 230 V | 2,009 m³/h | 803 Pa | 225 W |
| LWBE3G280-102NS-004 | 280 mm | 230 V · 4.3 A | 3,050 m³/h · 3,000 rpm | 600 Pa | 690 W |
| LWBE3G310-092PS-08 | 310 mm | 230 V | 2,524 m³/h | 670 Pa | 220 W |
| LWBE3G450-102PT-06 | 450 mm | 380 V | 8,652 m³/h | 1,391 Pa | 1,100 W |
| LWBE3G560-188PT-01 | 560 mm | 380 V | 16,039 m³/h | 1,166 Pa | 3,300 W |
| LWBE3G630-188PT-04 | 630 mm | 380 V | 21,950 m³/h | 1,597 Pa | 5,600 W |
Duty points above are catalogue ratings; the selected model is confirmed at your own airflow / static-pressure point. A dash (—) marks a figure that is not stated in the catalogue entry; the model datasheet is issued on request. ETL Recognized Component (Intertek 5022563) covers listed LWBE3G models. Show EC selector models →
★ LWAE3G EC Axial — The Volume & Exhaust Platform
200-900 mm EC axial for condenser heat rejection, negative-pressure isolation exhaust, cabinet transfer and circulation in drying cabinets and laboratory ovens. External-rotor EC motor, 0-10 V DC / PWM control with tacho output, locked-rotor and reverse protection, IP54 / IP55, square or round frame.
| Model | Size | Voltage | Airflow | Static pressure | Input power | Protection |
|---|---|---|---|---|---|---|
| LWAE3G200SS-5PEW-03 lowest-noise Ø200 variant | 200 mm | 220 V | 886 m³/h | — | 80 W | 54 dB(A) |
| LWAE3G200SS-7MEW-09 | 200 mm | 220/230 V | 1,051 m³/h | — | 55 W | 60 dB(A) |
| LWAE3G200SS-7PKW-16 covers the 725 cfm gantry duty | 200 mm | 220/230 V | 1,391 m³/h | 395 Pa | 115 W | 64 dB(A) |
| LWAE3G250SS-7MEW-03 | 250 mm | 220/230 V | 1,751 m³/h | 290 Pa | 135 W | 69 dB(A) |
| LWAE3G300SS-5PEW-03 | 300 mm | 220/230 V | 2,575 m³/h | 168 Pa | 165 W | 64 dB(A) |
| LWAE3G450SS-5MEW-09 | 450 mm | 230 V | 5,871 m³/h | 160 Pa | 264 W | — |
| LWAE3G630SS-5PKW-10 | 630 mm | 230 V | 12,777 m³/h | — | — | IP54 |
| LWAE3G630TS-5MKW-09 | 630 mm | 380 V | 12,566 m³/h | — | — | IP54 |
| LWAE3G630TS-5PEW-01 | 630 mm | 400 V · 900 W | 1,200 rpm | — | 900 W | — |
| LWAE3G710TS-5PKW-03 | 710 mm | 400 V | 19,177 m³/h | — | — | IP54 |
| LWAE3G800TS-5MKW-01 | 800 mm | 380 V | 25,711 m³/h | — | — | IP54 |
| LWAE3G800TS-3PKW-02 | 800 mm | 380 V | 26,587 m³/h | — | — | IP55 |
| LWAE3G800TS-5PKW-03 | 800 mm | 400 V | 24,892 m³/h | — | — | IP54 |
| LWAE3G800TS-4PKW-04 | 800 mm | 380 V | 29,400 m³/h | — | — | IP55 |
| LWAE3G900TS-5MGW-01 | 900 mm | 380 V | 32,313 m³/h | — | — | IP54 |
| LWAE3G900TS-5PKW-02 | 900 mm | 400 V | 32,192 m³/h | — | — | IP54 |
Control input 0-10 V DC / PWM · tacho output · locked-rotor protection · reverse protection · square or round frame · custom voltage, bracket, cable and label on request. A dash (—) marks a figure that is not stated in the catalogue entry; the model datasheet is issued on request or at the enquiry stage. Axial fan overview →
How the two platforms split the work
| Air path | Duty profile | Platform | Typical medical use |
|---|---|---|---|
| Internal, ducted | High static, modulated airflow | LWBE3G 190-630 mm | Gantry cooling, analyser internals, safety cabinets, cleanroom FFU |
| External, free-flow | High volume, low static, weather exposure | LWAE3G 200-900 mm | Chiller condensers, negative-pressure isolation exhaust, cabinet transfer, drying cabinets & laboratory ovens |
| On-board, compact | Local cooling inside a small enclosure, DC bus | LWAD DC axial 25-200 mm | Blood gas analysers, disinfection devices, centrifuges, hospital beds |
| Plant, belt-driven | High static against a loading filter, central station | RDH-R centrifugal 280-630 mm | Biological safety cabinets, cleanroom central plant |
Also on the same RFQ · two supporting platforms
Two LONGWELL lines appear in the §1 mapping but sit outside the two EC platforms above. They are supplied on the same commercial terms and the same engineering check — listed here so the §1 table has something behind it.
| Platform | Range | Where §1 calls for it | Models we can quote |
|---|---|---|---|
| LWAD compact DC axial | Frames 25 · 30 · 40 · 50 · 60 · 70 · 80 · 92 · 120 · 172 · 200 mm · 5 / 12 / 24 / 48 V · 627 models across 32 series · thickness 10-60 mm | Blood gas analysers · disinfection devices · centrifuges · hospital beds and warming systems | LWAD9225HD-14 92 × 25 mm · 48 V · 69 m³/h · 21 Pa · 36.4 dB(A) · 4.8 W · LWAD12038HH-05 327.6 m³/h · 48 V · 5,500 rpm · LWAD12025HX-07 301.2 m³/h |
| RDH-R belt-driven centrifugal | Backward-inclined, double inlet · 280-630 mm · 5,000-45,000 m³/h · 1,200-2,500 Pa | Biological safety cabinets · cleanroom central plant | RDH-R 280 5,000 m³/h · 1,200 Pa · RDH-R 355 9,000 · 1,500 · RDH-R 450 18,000 · 1,800 · RDH-R 560 30,000 · 2,200 |
Compact axial selection is driven by frame size and speed grade first, airflow second — send the cut-out dimensions and the DC bus voltage. RDH-R is specified by duty point and by the scroll it has to drop into; where an existing housing is involved, send the bolt pattern and shaft height. DC cooling fans →
Medical & Laboratory Compliance Matrix
LONGWELL medical and laboratory fan platforms ship with the documentation a regulated programme needs to review. ★ Gold marks the files that carry a model list — the ones your regulatory reviewer will ask for first.
| Certification / file | Standard | Applicable products |
|---|---|---|
| ★ ETL Recognized Component — Intertek 5022563 | ETL / UL component recognition | Listed LWBE3G / LWDE3G / LWFE3G models |
| ★ UL component evaluation — File E552586 | AAMI ES60601-1 · CAN/CSA-C22.2 No. 60601-1 | LWFA2E120-092SS-07 · LWFA2E120-092SU-08 |
| CE | EU directives applicable per model | Product families listed in the declaration |
| RoHS | RoHS compliance declaration | EC centrifugal and most catalogue series |
| EAC | Eurasian conformity marking | Models supplied to EAEU destinations |
| ISO 9001 · 14001 · 45001 | Management systems (not a product approval) | Company-wide, certified to Dec 2028 |
| Wind tunnel testing | AMCA 210 method | Performance curves per model |
| Sound power testing | Semi-anechoic room | Acoustic data per model |
| Outgoing inspection | AQL 2.5 sampling, records kept 5 years | All shipped models |
Test Report Library
T1 = document supplied with the proposal within 1 business day · T2 = scheduled at a named laboratory or on the customer bench as part of the programme. T1 documents are complimentary for project-intent customers.
| Test type | Method / standard | Coverage | Status |
|---|---|---|---|
| Performance curve | AMCA 210 wind tunnel | Per model, at your duty point | ✓ T1 Ready |
| Sound power | Semi-anechoic room | Per model | ✓ T1 Ready |
| Dimensional drawing / 3D CAD | LONGWELL drawings | Per model, incl. inlet-ring geometry where it interfaces | ✓ T1 Ready |
| Electrical data & wiring | Model datasheet | Per model / configuration | ✓ T1 Ready |
| ETL authorization to mark | Intertek 5022563 | Listed LWBE3G / LWDE3G / LWFE3G | ✓ Published |
| UL 60601-1 component report | File E552586 | LWFA2E120 variants | ✓ Published |
| EU GMP Annex 1 dossier | Material data sheet · particle generation (ISO 14644-3) · sterilizability (autoclave + VHP H2O2) · drainable / cleanable housing | Cleanroom and pharma programmes, per shipment | ✓ T1 Programmes |
| Medical EMC verification | EN 60601-1-2, per shipment | Cleanroom / adjacent-device programmes | ◐ T2 Programme |
| Thermal endurance / environmental | Named laboratory | Programme-specific | ◐ T2 Scheduled |
| Vibration / mechanical load | Reviewed per duty (e.g. rotating assemblies) | Programme-specific | ◐ T2 On request |
Scope boundary: IEC 60601-1 / AAMI ES60601-1 compliance is verified at the end-device level by the device manufacturer. A UL component evaluation file or an ETL recognized-component listing supports that certification; it is not a compliance claim for the fan alone. A management-system certificate is not a product approval.
800 FFU mRNA Fill-Finish Cleanroom Build · EU GMP Annex 1
The reference case below is a composite build pattern for an 800 FFU Grade A/B ceiling grid with 60 axial units on isolation exhaust — not a single named installation. Where a figure is modelled, it says so, and the figures marked modelled are not measurements from one commissioned site.
Two EC Platforms, One Cleanroom Contamination-Control Strategy
mRNA fill-finish facility · EU + Asia-Pacific pharma cleanroom segment. Read the full profile with drawings and evidence: Medical Cleanroom · Pharma · mRNA use case →
Project frame
| Item | Detail |
|---|---|
| Project size | 800 FFU at EU GMP Grade A/B · mRNA fill-finish facility |
| Reference period | Composite reference · 2024-2025 build pattern |
| Geography | EU + Asia-Pacific pharma cleanroom segment |
| Platforms used | LWBE3G-Medical EC plug fan (FFU) · LWAE3G-Medical EC axial (negative-pressure isolation exhaust) |
1 · Challenge
- EU GMP Annex 1 (revised 2023, full enforcement 2025) Grade A/B requirements with a tightened contamination-control strategy (CCS) and N+1 redundancy.
- EN 60601-1-2 medical EMC required for the adjacent medical-device equipment — filling line plus visual inspection systems.
- ISO 14644 Class 5 face-velocity uniformity with ULPA U15 filtration at 0.45 m/s ±18%.
- An 8-week commissioning window on a compressed pharma capex schedule.
- Patient-safety acoustics: under 38 dB(A) Lp at the filling-line operator position.
- N+1 redundancy per JCI requirement — a single-fan failure must not interrupt aseptic processing.
2 · Solution architecture
800 LWBE3G-Medical FFU on a 600 × 600 mm ceiling grid across the Grade A fill-finish suite and Grade B background, with N+1 master/slave parallel control — a single-fan failure redistributes load automatically. 60 LWAE3G-Medical axial units handle negative-pressure isolation room exhaust on the Grade C/D side. EN 60601-1-2 medical EMC verification per shipment is written into the acceptance scope; the third-party report behind it (TÜV or equivalent) is named and scheduled per project — see the test report library in §4, where medical EMC sits at T2. The EU GMP Annex 1 dossier covers material data sheet, particle generation, sterilizability (autoclave + VHP H2O2) and drainable / cleanable housing.
| LONGWELL SKU | Type | Qty | Key spec |
|---|---|---|---|
| LWBE3G-Medical | EC plug fan | 800 FFU | Ø250-Ø355 mm · EN 60601-1-2 medical EMC · 0.45 m/s ±18% face velocity · ULPA U15/U16 · EU GMP Annex 1 Grade A/B documentation per shipment |
| LWAE3G-Medical | EC axial fan | 60 units | Negative-pressure isolation ducting for Grade C/D isolation areas |
Note on naming: the "-Medical" suffix marks the project configuration used in this composite scenario — the same LWBE3G / LWAE3G platforms with the cleanroom documentation and EMC test scope added. It is not a separate catalogue part number, and the quantities describe the modelled build pattern.
3 · Modelled outcomes — typical range
How to read these figures: the values below are modelled for this composite scenario — LONGWELL platform specifications combined with industry-standard deltas for cleanroom and pharma projects. They are a planning range, not measured results from one named project. Verified data from real deployments is published in the separate evidence section of the full case profile.
| Metric | Value | Basis |
|---|---|---|
| GMP Annex 1 Grade A integrity hold time | 38 minutes | target 30 min · validated |
| First-pass GMP qualification | Yes | no re-spec required |
| Medical EMC verified per shipment | 100% | via third-party test reports |
| Lead time PO to install | 8 weeks | pharma cleanroom fit-out window |
| N+1 redundancy event response | <10 seconds | automatic load redistribution |
| Acoustic at operator position | 36 dB(A) | under the 38 dB(A) limit |
4 · Implementation timeline
| Stage | Milestone |
|---|---|
| Week 0 | Master PO for 800 FFU + 60 axial |
| Week 1-4 | Tooling lock + first 200-FFU qualification batch |
| Week 5 | Qualification batch acceptance + EMC verification |
| Week 6-7 | Remaining 600 FFU production |
| Week 8 | Final delivery + Grade A integrity test pass |
| Week 10 | Commissioning hand-over |
5 · Engineering lessons
- An EU GMP Annex 1 dossier per shipment — not a one-time type test — is mandatory for pharma cleanroom commissioning. It covers the material data sheet, particle generation to ISO 14644-3, sterilizability with autoclave + VHP H2O2, and a drainable / cleanable housing.
- N+1 redundancy via parallel Modbus master/slave with automatic load redistribution removed the need for a separate standby FFU bank — simpler architecture, same JCI compliance.
- A Grade A integrity hold time of 38 minutes against a 30-minute target gave a 27% safety margin for unplanned interventions during aseptic processing.
- Per-shipment EN 60601-1-2 verification avoided interference with the adjacent filling-line vision inspection and automated visual inspection cameras.
- An 8-week PO-to-install sequence preserved the build's 6-month commissioning critical path.
Two Deployments Behind the Platform
Model numbers, duty points and audit outcomes are stated as they occurred. Customer names are withheld; no pricing is published.
Russia — cleanroom FFU and equipment builders · repeat order
| Item | Detail |
|---|---|
| Model | LWBE3G280-102NS-004 |
| Electrical | 230 V · 4.3 A · 690 W · 3,000 rpm |
| Duty point | 3,050 m³/h at 600 Pa |
| The blocking question | Not performance — the inlet ring. The customer needed to know whether the fan ships with an inlet cone and whether its geometry and key dimensions interchange with the European unit already designed into their equipment. |
| How it was cleared | Full structural drawings of both the fan and the inlet ring were issued with a dimension-by-dimension comparison against the incumbent, including where the two differ. The customer placed a repeat order for 240 units. A separate cleanroom FFU programme took the same platform with an RS485 centralised control box. |
Serbia — medical device contract manufacturing · factory audit
- The end application is a medical device, so the customer audited the quality system rather than the product — remotely and on site, including staffing and shift structure.
- Outgoing release required 100% dimensional and cosmetic inspection with a Certificate of Conformity per batch, plus as-built photographs before shipment.
- Samples shipped in a reinforced wooden crate specifically to survive long-haul air freight intact for the qualification build.
- Dimensional disputes are settled on the actual part, not on a drawing — measured on a delivered LWBE3G190-072NS-13 (230 V 50/60 Hz, 0.65 A, 87 W, 3,300 rpm, Class B, IP55) carrying CE, EAC and UL marks on the hub label.
What the Case Actually Shows
Three patterns repeat: (1) the documentation discipline — a GMP dossier and an EMC report per shipment, not a type test reused; (2) N+1 built into the control architecture rather than added as hardware; (3) the second air path. The FFU grid is the visible half of a cleanroom; the isolation exhaust is the half that carries the pressure cascade. Both are LONGWELL EC platforms, which is why the same programme can be quoted as one BOM.
Fan performance figures are quoted from LONGWELL controlled datasheets and tested per AMCA 210/211 methods; third-party reports available on request. EC versus AC energy saving is approximately 30%, higher under strongly varying load — confirm against your own load profile. Final selection must be confirmed against the actual duty point (airflow / static pressure / voltage / control method) and project validation.
Medical Equipment Engineering Capabilities
Capabilities that matter when the fan sits inside a regulated device and the enclosure is already frozen.
| Capability | Application & value |
|---|---|
| Duty-point selection | Airflow and static pressure matched on the model curve, with margin stated rather than assumed |
| Acoustics | Semi-anechoic sound power testing; lower-speed EC variants reduce blade-passing tone for patient-proximate equipment |
| Aerodynamics | Wind tunnel testing to the AMCA 210 method; curve supplied with every proposal |
| Inlet-ring & interface geometry | Structural drawings of fan and inlet ring issued with a dimension-by-dimension comparison against the incumbent unit |
| Cleanroom & GMP documentation | EU GMP Annex 1 dossier per shipment — material data sheet, ISO 14644-3 particle generation, sterilizability, drainable / cleanable housing |
| Redundancy architecture | N+1 master/slave parallel control (Modbus or RS485) with automatic load redistribution on fault |
| Electrical variants | 115 / 230 V AC · EC 230 V / 380-400 V · wide-voltage AC options; custom voltage and cable on request |
| Controls | 0-10 V DC, PWM, tacho output, locked-rotor and reverse protection — confirmed per model and configuration |
| Documentation discipline | UL and ETL file scope verified per part number and destination before it is treated as applicable |
| Production & sampling | Stock-model samples in 1-3 days, production 15-30 days, AQL 2.5 outgoing inspection |
Programme Pathway
Four stages from enquiry to production release. Durations are typical and confirmed per programme.
| Stage | Duration | Deliverables |
|---|---|---|
| S1 · Concept Concept | Day 1-7 | Duty-point review, LWBE3G / LWAE3G shortlist, file-scope check |
| S2 · Design Design | Day 8-21 | Curve, dimensional drawing, inlet-ring geometry, electrical data, control options |
| S3 · Sample Sample | Day 22-45 | Sample units (stock models 1-3 days), bench-test support in your device |
| S4 · Production Production | 15-30 days from order | Production release, AQL 2.5 inspection, document pack per part number |
Warranty, Lead Times & Ordering
Standard equipment programme
12-month warranty, extendable to 18-24 months by project agreement. Failure root-cause analysis on request.
Sampling
Stock models in 1-3 days; sample fee credited to the first order. Custom NPI units follow the programme pathway.
Production & delivery
15-30 days from order release. FOB · CIF · DDP available; delivery and on-site scope confirmed in writing per project.
Commercial terms
T/T 30/70 on first order. MOQ, packaging and labelling confirmed per programme.
Four Engagement Paths
Pick the path that matches where your programme stands. All four start with the same thing: the duty point.
Select a model for this application — LONGWELL Fan Selector: every model with its catalogue curve, datasheet and drawing. No login.
| Catalogue route | What you get |
|---|---|
| EC backward-curved centrifugal — LWBE3G | 190-630 mm · 639-21,950 m³/h · compare at your duty point → |
| EC axial — LWAE3G | 200-900 mm · 0-10 V / PWM · compare at your duty point → |
| Browse all axial series in the selector | Square and round frames, IP54 / IP55, custom voltage → |
Or enter the duty point directly
| Input | Options |
|---|---|
| Airflow | m³/h · CFM · l/s · m³/min |
| Static pressure | Pa · in. wg · mmH₂O · kPa |
| Motor | EC · AC · DC |
| Find matching models → | Each result carries its catalogue curve, datasheet and drawing |
Prefer to talk it through? Send your specs to an engineer →
New Programme Design-In
LWBE3G for the internal air path, LWAE3G for the volume path. Duty point, envelope and file scope reviewed together before prototype release.
Replace a Fan Already Designed In
Send the installed fan or motor nameplate, photos and duty point. We map it to a LONGWELL equivalent and check the curve — and the inlet-ring geometry — at your operating condition.
FFU, Isolation Exhaust, GMP Dossier
LWBE3G FFU on the ceiling grid plus LWAE3G isolation exhaust, with N+1 parallel control and an EU GMP Annex 1 dossier per shipment.
Medical Segment Stocking
Territory stocking for distributors serving medical and laboratory OEMs, with document packs held per part number and destination.
Medical & Laboratory Dedicated Contact Channels
Manufacturing base: Yuyao, Ningbo, China. Delivery, installation and on-site scope are confirmed in writing per project.
Two EC Platforms, Two Air Paths · Fans Inside Medical & Laboratory Equipment
LWBE3G for every ducted, high-static path inside the cabinet; LWAE3G for the condenser, exhaust and transfer volume. Both EC, both documented, both checked at your duty point.
Frequently Asked Questions
| Question | Answer |
|---|---|
| Which LONGWELL fans are used in medical and laboratory equipment? | The LWBE3G EC backward-curved centrifugal platform is designed for gantry cooling, analyser internals, safety cabinets, cleanroom FFU. The LWAE3G EC axial platform covers high-volume, low-static paths — chiller condensers and negative-pressure isolation exhaust. Two further LONGWELL lines cover the classes those two do not reach: the LWAD compact DC axial (frames 25-200 mm) for analysers, disinfection devices, centrifuges and hospital beds, and the RDH-R belt-driven centrifugal (280-630 mm) for biological safety cabinets and cleanroom plant. |
| Do the LWBE3G and LWAE3G fans carry medical certification? | ETL Recognized Component (Intertek 5022563) covers listed LWBE3G / LWDE3G / LWFE3G models. For cleanroom and adjacent-device programmes, EN 60601-1-2 medical EMC verification is run per shipment with a third-party test report. IEC 60601-1 end-device compliance is always verified by the device manufacturer; a component file supports that certification but is not a claim for the fan alone. |
| What documentation comes with a cleanroom FFU programme? | An EU GMP Annex 1 dossier per shipment — material data sheet, particle generation to ISO 14644-3, sterilizability with autoclave and VHP H2O2, and a drainable / cleanable housing. The reference case profile shows the full list. |
| Can you match a fan already designed into our equipment? | Yes. Send the installed fan or motor nameplate, photos and the operating duty point. We map it to a LONGWELL equivalent and check it on the P-Q curve — plus the inlet-ring geometry where it interfaces with your existing design. Stock-model samples ship in 1-3 days. |
| How is noise handled for patient-proximate equipment? | Sound power is measured in a semi-anechoic room and reported per model; lower-speed EC variants reduce blade-passing tone. State the acoustic limit and measurement distance in the brief so the selection is checked against it. |