Axial fan VAR series

Product overview
The LTG axial fan VAR series is a direct‑drive axial fan with impeller blades that can be adjusted at standstill. It is designed for medium‑pressure applications and offers aerodynamic performance across a wide range of flow rates. Standard impellers are cast with 10 profiled blades; special variants with fewer blades are available for lower pressure duties. Blade adjustment allows setting the fan to the required operating point.

Technical data (excerpt)

• VAR 800 — Max. air volume 40,000 m³/h; Max. static pressure 850 Pa; Impeller Ø 800 mm; Media temperature -5 to +40 °C; Pressure range: Medium pressure; Efficiency: 83.5%
• VAR 900 — Max. air volume 55,000 m³/h; Max. static pressure 850 Pa; Impeller Ø 900 mm; Media temperature -5 to +40 °C; Pressure range: Medium pressure; Efficiency: 83.5%
• VAR 1000 — Max. air volume 80,000 m³/h; Max. static pressure 1,450 Pa; Impeller Ø 1,000 mm; Media temperature -5 to +40 °C; Pressure range: Medium pressure; Efficiency: 83.5%
• VAR 1120 — Max. air volume 110,000 m³/h; Max. static pressure 1,450 Pa; Impeller Ø 1,120 mm; Media temperature -5 to +40 °C; Pressure range: Medium pressure; Efficiency: 83.5%
• VAR 1250 — Max. air volume 150,000 m³/h; Max. static pressure 2,200 Pa; Impeller Ø 1,250 mm; Media temperature -5 to +40 °C; Pressure range: Medium pressure; Efficiency: 83.5%
• VAR 1400 — Max. air volume 230,000 m³/h; Max. static pressure 2,200 Pa; Impeller Ø 1,400 mm; Media temperature -5 to +40 °C; Pressure range: Medium pressure; Efficiency: 83.5%

Additional features

• Quality class G 6.3 according to DIN ISO 1940
• Direct drive with overhung impeller bearing on motor shaft
• Impeller blades adjustable at standstill for individual operating point setting
• Corrosion protection options: sandblasting, hot‑dip galvanising, rubber coating, stainless steel
• Hot‑gas version up to 200 °C
• Explosion‑proof versions available (ATEX)

Characteristics / Technical specifications

• Series: VAR
• Drive: direct drive with overhung bearing mounted on a bearing block welded to the housing on the suction side
• Standard impeller: 10 profiled cast blades; special versions with fewer blades for lower pressures
• Adjustable impeller blades at standstill allow adapting the fan to the desired operating point
• Temperature range (standard): -5 to +40 °C; optional hot‑gas version up to 200 °C
• Pressure class: medium pressure (type dependent)
• Typical efficiency: approx. 83.5% for the listed types
• Custom options: corrosion protection treatments, material choices, ATEX certification, customised impeller versions