ImpellerØ203 mm8.0 in
Max airflow2,734 m³/h1,609 CFM
Max static pressure467 Pa1.87 in. wg
Voltage220 V
Speed1,440 rpm
Input power585 W

LWDD8-7-EC DD Series EC Direct Drive Centrifugal Blower Ø203 mm

Ø203 mm | EC | Max airflow 2,734 m³/h | Max static pressure 467 Pa

SKU: LWDD8-7-EC Categories: Commercial Centrifugal Blowers, Impeller Ø178–254 mm

Direct from LONGWELL
OEM / ODM
Samples in 1–3 days
Production 15–30 days
12-month warranty
CE · RoHS · ETL on request

PDFDatasheet (PDF)electrical & performance data

All files for LWDD8-7-EC4 files · direct download

WEBPDimensional drawing WEBPPerformance curve WEBPWiring diagram

CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center

Used in

Convection ovens Tunnel ovens Commercial dryers Industrial AHUs All industries →

Proven in projects

Drying, heat treatment & ovens Range hoods & ovens Cleanroom build All case studies →

Engineering files (on request)

CAD files exist for this model and can be released for assembly checks in SolidWorks / CATIA / Creo / Inventor.

EXB2D drawing (CAXA EXB)5.7 MBRequest →

CAD models contain the blade geometry and are not publicly downloadable. Tell us the project; an engineer sends the file after a short check, normally within 1 business day.

Get a quote · LWDD8-7-EC

Price, curve check and lead time within 1 business day.

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWDD8-7-ECdatasheet · catalogue · drawings · curves — listed above

Samples 1–3 days · fee credited to your order
Typically 50–200 pcs · ~30 pcs for a first validation order
T/T 30 / 70 · FOB / CIF / DDP
Released to LONGWELL standards · 12-month warranty
How ordering works →

Performance curve (P-Q) LWDD8-7-EC

Required airflow Required static pressure

Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade (1 here, rated 220 V). Data version: catalogue curve re-digitised 2026-09-20 (axis-calibrated, cross-checked). 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.

Drawing, Curve & Wiring LWDD8-7-EC

LWDD8-7-EC Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWDD8-7-EC Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWDD8-7-EC Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Files for LWDD8-7-EC: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWDD8-7-EC

LWDD8-7-EC is a LONGWELL DD Series EC Direct Drive Centrifugal Blower from the Impeller Ø178–254 mm range, impeller Ø203 mm, rated 220 V EC, maximum airflow 2,734 m³/h, maximum static pressure 467 Pa, input power 585 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	LWDD8-7-EC
Motor type	EC
Phase	1-phase
Rated voltage	220 V
Frequency	50 Hz
Input power	585 W
Speed	1,440 rpm
Max. airflow	2,734 m³/h
Max. static pressure	467 Pa
Storage temperature	-25 ~ 80℃
Humidity	0 ~ 50 % RH
Altitude	< 1000m
Impeller diameter	Ø203 mm
Dimensions	8-7
Impeller material	Volute assembly and impeller assembly are galvanized sheet
Balance grade	G6.3
Vibration standard	JB/T 8689
Service life	30,000Hours(L10), At 40 °Croom, humidity 15%~50%RH

Typical applications

Commercial kitchen extraction
Ventilation units and AHUs
Process and fume extraction

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.

Company certificates

Scans of original documents held by Ningbo Longwell Electric Technology Co., Ltd.: the company ISO 9001 / 14001 / 45001 management-system certificate. Click a scan to open the original.

ISO 9001 / 14001 / 45001Management systems of Ningbo Longwell Electric Technology Co., Ltd. (company certificate).

ISO 9001 / 14001 / 45001 management system certificate — LONGWELL certificate

PDFISO 9001 / 14001 / 45001 management system certificate

Need a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.

How to order LWDD8-7-EC

Most first orders follow the same eight steps. Quantities, terms and lead times are confirmed in your quotation.

1SelectFind models by duty point in the selector or by model number, compare on the curve and add them to your RFQ list.
2Engineering checkWithin 1 business day you receive the duty-point check on the curve, price and lead time.
3SamplesStock models ship in 1–3 days.
4Validation supportDatasheets, drawings, wiring diagrams and DoC per model; test reports, CAD and register maps after a short project check or NDA.
5Order & paymentProforma invoice; first orders on T/T 30 / 70.
6Production & release15–30 days at the partner factory that builds your model, then inspected and released to LONGWELL standards with outgoing sampling to AQL 2.5.
7ShippingFOB / CIF / DDP by sea from Ningbo or Shanghai; express and air on EXW / FCA / DAP.
8After-sales12 months standard, extendable to 18–24 months by project agreement; test records retained for 5 years; 8D closed-loop for any issue; annual technical review for framework customers.

See terms, QC and FAQ →

Test & release at LONGWELL

Specified and drawn by LONGWELL; built to LONGWELL drawings by qualified partner factories; inspected and released to LONGWELL standards before shipment.

See test and release photos (8)