Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade (2 here, rated 400 V). Data version: catalogue 2026-08. The system resistance curve depends on the actual ductwork — confirm the operating point on site. Need an engineer to verify the duty point? Contact us or add the model to your RFQ and note the duty point.
Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.
- ImpellerØ310 mm12.2 in
- Max airflow4,398 m³/h2,587 CFM
- Max static pressure824 Pa3.31 in. wg
- Voltage400 V
- Speed2,600 rpm
- Input power980 W1.31 hp
- Noise74 dB(A)
LWBE3G310-138PT-04 EC Plug Fan Ø310 mm
Ø310 mm | EC | Max airflow 4,398 m³/h | Max static pressure 824 Pa | 74 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · RoHS · ETL on request
PDFDatasheet (PDF)electrical & performance dataPDFFull product catalogueEC ( ) EC plug fans #1 · SKU on PDF p. 38
All files for LWBE3G310-138PT-046 files · direct download
PDFFull product catalogue · model on PDF p. 38WEBPDimensional drawingWEBPPerformance curveWEBPWiring diagramDOCXDatasheet
CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center
Proven in: AHU & ventilation unit fans · CRAH FanGrid retrofit · Heat pump fan programme — all case studies on longwellfans.com
Cross-reference: same impeller size class as ebm-papst K3G310, ebm-papst R3G310, ebm-papst RadiPac 310, Ziehl-Abegg RH31C — side-by-side comparison on longwellfans.com. Mounting is confirmed against the LONGWELL drawing before ordering.
Typical applications: Industrial AHUs · Air conditioning · Air handling units · FanGrid arrays — all industries
Engineering files (on request)
CAD files exist for this model and can be released for assembly checks in SolidWorks / CATIA / Creo / Inventor.
CAD models contain the blade geometry and are not downloadable. Tell us the project; an engineer sends the file after a short check, normally within 1 business day.
LONGWELL 310mm EC Backward Curved Centrifugal Fan for High-Efficiency HVAC & Air Handling | LWBE3G310 · open in video library
Quiet & Stable, Rooted in Precision Dynamic Balancing | LWBE3G310-102NS · open in video library
Downloads for LWBE3G310-138PT-04
PDFFull product catalogue · EC ( ) EC plug fans #1 · model on PDF p. 38 · 48.6 MBDOCXDatasheet · 522 KBPDFDatasheet · 613 KBNeed a non-standard size or another format? Ask an engineer or search the download center.
LWBE3G310-138PT-04 is a LONGWELL EC Plug Fan from the Plug Fans (RLM Plenum Fans) range, impeller Ø310 mm, rated 400 V EC, maximum airflow 4,398 m³/h, maximum static pressure 824 Pa, noise 74 dB(A), input power 980 W. The EC motor integrates the drive electronics: stepless speed control by 0–10 V or PWM signal, speed feedback and high efficiency at part load.
Technical data
| Model | LWBE3G310-138PT-04 |
|---|---|
| Series | LWBE3G310 |
| Motor type | EC |
| Phase | 3-phase |
| Rated voltage | 400 V |
| Frequency | 50 Hz |
| Current | 1.64 A |
| Input power | 980 W |
| Speed | 2,600 rpm |
| Max. airflow | 4,398 m³/h |
| Max. airflow (CFM) | 2,587 CFM |
| Max. static pressure | 824 Pa |
| Noise | 74 dB(A) |
| Ambient temperature | -25 ~ 60 °C |
| Storage temperature | -25 ~ 70℃ |
| Humidity | 0 ~ 85% RH |
| Altitude | < 1000m |
| Impeller diameter | Ø310 mm |
| Rotor diameter | 138 mm |
| Impeller material | Aluminum Alloy (Impeller) |
| Protection class | IP54 |
| Insulation class | F |
| Bearing | Maintenance-free deep groove ball bearings |
| Duty | S1 |
| Balance grade | G6.3 |
| Vibration standard | JB/T 8689 |
| Service life | 40,000Hours(L10). At 40℃room, humidity 15%~65%RH |
| Speed control | Control input 0~10VDC / PWM (RS485 external control box can be connected) |
| Control signal | Control signal VSP voltage range 1.5±0.1VDC~9.5±0.2VDC(During normal operation, when the VSP voltage is below 0.9±0.1VDC, the motor switches from operating mode to standby mode) |
| PWM input | PWM signal: frequency 1K–10KHz, amplitude 10–12V,duty cycle 30%–70% . |
| Speed feedback | Tach output: 12Pulse/R; FG internal open circuit output, external pull-up resistor 10KΩ, pull-up voltage +10V |
| Auxiliary output | Output 10±0.3VDC, Max Current: 10mA |
| Communication | LWRS485-01 |
| Protection functions | Over-temperature protection, Over-current protection, Locked-rotor protection |
| Soft start | Delay time <30 seconds to full speed |
Typical applications
- Air handling units (AHU) and rooftop units (RTU)
- Data-center CRAH / CRAC units and fan walls
- Dust extraction and process ventilation
- Fan filter units and air purifiers
Series LWBE3G310: models in the same series share the impeller and motor platform and differ in speed grade, voltage or lead-out / terminal-box configuration — compare them in the table below or ask for the best fit at your duty point.
Nameplate values: maximum airflow is measured at zero static pressure and maximum static pressure at zero airflow; the two never occur together. Confirm the operating point on the performance curve. Final selection is subject to the duty point (airflow / static pressure / voltage / control mode) and project verification.
Alternatives with the same impeller (Ø310 mm · EC)
Same impeller, different speed grade, power or wiring. Step up for more airflow, step down for lower noise.
| Model | Max airflow | Max static pressure | Speed | Power | Noise | Voltage | |
|---|---|---|---|---|---|---|---|
| LWBE3G310-138PT-04 this model | 4,398 m³/h | 824 Pa | 2,600 rpm | 980 W | 74 dB(A) | 400 V | |
| LWBE3G310-092PS-11 | 2,235 m³/h | 474 Pa | 1,850 rpm | 160 W | 75 dB(A) | 230 V | View |
| LWBE3G310-092NS-20 | 2,235 m³/h | 474 Pa | 1,850 rpm | 160 W | 75 dB(A) | 230 V | View |
| LWBE3G310-092PS-12 | 2,410 m³/h | 443 Pa | 1,750 rpm | 150 W | 75 dB(A) | 230 V | View |
| LWBE3G310-092NS-17 | 2,410 m³/h | 443 Pa | 1,750 rpm | 150 W | 75 dB(A) | 230 V | View |
| LWBE3G310-102NS-16 | 2,868.6 m³/h | 630 Pa | 2,150 rpm | 285 W | 70 dB(A) | 230 V | View |
| LWBE3G310-102PS-02 | 2,869 m³/h | 630 Pa | 2,150 rpm | 285 W | 70 dB(A) | 230 V | View |
| LWBE3G310-102PS-16 | 2,884 m³/h | 963 Pa | 2,600 rpm | 450 W | 78 dB(A) | 230 V | View |
| LWBE3G310-102NS-18 | 2,884 m³/h | 963 Pa | 2,600 rpm | 450 W | 78 dB(A) | 230 V | View |
| LWBE3G310-102PS-15 | 2,936 m³/h | 700 Pa | 2,300 rpm | 370 W | 76 dB(A) | 230 V | View |
| LWBE3G310-102NS-19 | 2,936 m³/h | 700 Pa | 2,300 rpm | 370 W | 76 dB(A) | 230 V | View |
| LWBE3G310-138NT-05 | 4,398.1 m³/h | 824 Pa | 2,600 rpm | 980 W | 74 dB(A) | 400 V | View |
| LWFE3G310-102PT-09 | 5,150 m³/h | 1,730.4 Pa | 3,000 rpm | 1,100 W | 85 dB(A) | 400 V | View |
| LWBE3G310-138NT-25 | 5,592.9 m³/h | 1,082 Pa | 3,300 rpm | 1,588 W | 92 dB(A) | 400 V | View |
| LWBE3G310-138PT-10 | 5,593 m³/h | 1,082 Pa | 3,300 rpm | 1,588 W | 92 dB(A) | 400 V | View |
Not sure which one? Send us the duty point (airflow / static pressure / noise limit) — use the selector or ask an engineer.
Other models in the LWBE3G310 seriesSame impeller, different speed grade or wiring
LWBE3G310-072NS-07Ø310 mm · 2,266 m³/h · 700.4 Pa · ECsame series
LWBE3G310-072NU-27Ø310 mm · 2,266 m³/h · 700.4 Pa · ECsame series
LWBE3G310-072NS-21Ø310 mm · 2,266 m³/h · 618 Pa · ECsame series
LWBE3G310-092NS-22Ø310 mm · 2,678 m³/h · 607.7 Pa · ECsame series
LWBE3G310-092NU-28Ø310 mm · 2,678 m³/h · 607.7 Pa · ECsame series
LWBE3G310-092NS-23Ø310 mm · 2,523.5 m³/h · 669.5 Pa · ECsame seriesAdjacent sizesOne size up when airflow is short, one size down when it is too much
LWBA6E315-102NS-07Ø315 mm · 1,030 m³/h · 155 Pa · ACadjacent size
LWBA4E315-102NS-04Ø315 mm · 1,957 m³/h · 412 Pa · ACadjacent size
LWBA4E315-102NS-05Ø315 mm · 1,957 m³/h · 309 Pa · ACadjacent size
LWBA4E315-102NS-06Ø315 mm · 2,163 m³/h · 412 Pa · ACadjacent size
LWBA4E315-102NS-03Ø315 mm · 1,700 m³/h · 309 Pa · ACadjacent size
LWBA6E315-102NS-08Ø315 mm · 1,133 m³/h · 185 Pa · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWBE3G310-138NT-05Ø310 mm · 4,398.1 m³/h · 824 Pa · ECsimilar duty
LWBE3G280-102NT-17Ø280 mm · 4,377.5 m³/h · 1,751 Pa · ECsimilar duty
LWFE3G280-102PT-08Ø280 mm · 4,377.5 m³/h · 1,751 Pa · ECsimilar duty
LWFE3G280-138DS-02Ø280 mm · 4,422 m³/h · 592 Pa · ECsimilar duty
LWAA4D400S-5MKB-19Ø400 mm · 4,429 m³/h · ACsimilar duty
LWAA4E400S-5MEB-13Ø400 mm · 4,429 m³/h · ACsimilar dutySee all Centrifugal Fans · select by duty point