Centrifugal roof fans in the steel casing with the horizontal exhaust of air and the air capacity up to 4700 m3/h. Designed for exhaust ventilation systems.
VENTS VKH series
Product Description
Applications
Exhaust ventilation system for various premises suitable for roof mounting. Compatible with Ø 200 to 500 mm air ducts. Suitable for any roof types as well as vertical ventilation shafts.
Design
The fan casing is made of steel with polymeric coating (VENTS VKH model), aluminum (VENTS VKHA), galvanized steel (VENTS VKHz).
Motor
2-, 4- or 6-pole single or three phase asynchronous external rotor motor and impeller with backward curved blades installed on the motor shaft. The motor is equipped with thermal overheating protection with automatic restart as well as ball bearings for long service life. For precise features, safe operation and low noise, each turbine is dynamically balanced while assembly. Motor protection rating IP 44.
Speed control
Both smooth or step speed control is performed by means of the thyristor or autotransformer controller. Several fans can be connected to one controller in case the total power and operating current do not exceed the rated controller values.
Mounting
The fan is mounted on the roof directly above the ventilating duct or shaft and is firmly fixed to the flat surface by means of a connecting plate. While mounting VKH fans directly onto the flat roof a supporting block shall be provided to prevent water and snow drops into the vent of the ventilation shaft.
