Description
AT 18-18LK — Belt-Driven Forward-Curved Centrifugal Blower
The LONGWELL AT 18-18LK is a forward-curved (multi-wing) centrifugal blower from the AT belt-driven commercial range. Per the AT series type code, 18 is the impeller diameter designation and 18 the impeller width designation; Construction type LK (AT series type code). The casing measures 684×739 mm housing (dimensions A–B below). Because the fan is belt-driven, the duty point is set by the pulley ratio you choose — the figures below are the operating envelope printed on the AT 18-18 catalogue performance chart, not a single rated point.
LONGWELL states the AT series covers 1,000–40,000 m³/h overall, and is characterised by compact construction, high efficiency and low noise. Catalogue performance is quoted at standard conditions (inlet pressure 101.325 kPa).
Performance envelope
| Volume flow rate | 1,700 – 25,000 m³/h |
| Total pressure Pt | 60 – 700 Pa |
| Rotational speed | 300 – 850 rpm |
| Impeller power | 0.12 – 6 kW |
| Sound pressure level | 60 – 85 dB(A) |
| Total efficiency η | up to 58% |
The catalogue performance chart shows a separate LK–RK duty zone for the K build, which extends above the standard L–R zone.
Send us your required airflow and static pressure and our engineers will return the matching speed, pulley set and motor rating.
Dimensions (mm)
| A | 684 mm |
| B | 739 mm |
| C | 477 mm |
| D | 415 mm |
| E | 608 mm |
| I | 790 mm |
| J | 557 mm |
| K | 583 mm |
| L | 607 mm |
| M | 87.1 mm |
| N | 314 mm |
| W | 70 mm |
| X | 38 mm |
| X1 | 262 mm |
| X2 | 283 mm |
| X3 | 278 mm |
| H1 | 457 mm |
| H2 | 376 mm |
| H3 | 340 mm |
| d | 35 mm |
| t | 10 mm |
| t1 | 8 mm |
Letter codes correspond to the AT series dimensional drawing shown below. All values from the LONGWELL AT series catalogue.
Performance curves
Dimensional drawing
The Company Longwell Leading Fan and Motor Innovator Worldwide
As a leading supplier of ventilation and drive technology, LONGWELL is a highly respected engineering partner in many industries. With over than 20,000 different products, we provide the right solution for every need. And we have always worked according to the highest economic and ecological standards.
LONGWELL Product Line
LONGWELL Certificate
Reviews
There are no reviews yet.