Centrifugal roof fans VENTS VKVA - official VENTS website

Description

APPLICATION

Exhaust ventilation systems for commercial, office and other public or industrial premises for various premises suitable for roof mounting.
Compatible with Ø 200-630 mm air ducts.
Suitable for any roof types as well as vertical ventilation shafts.

DESIGN

MOTOR

2-, 4- or 6-pole single- or three-phase asynchronous motors with an external rotor and impeller with backward curved blades.
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.
Motors protection rating IP44, IP54.

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.
Electrical connection and installation shall beperformed in compliance with the manual and circuit diagram on the terminal box.
For connection of the fans to round air ducts use the following accessories: KKV damper, GVK flexible connector, FKV counter flange.
For mounting of the fans to flat surface use the mounting frame RKV.

Modifications

Modification name

VKVA 2E 220

VKVA 2E 190

VKVA 2E 225

VKVA 4E 225

VKVA 2E 250

VKVA 4E 250

VKVA 4E 280

VKVA 2E 310

VKVA 4E 310

VKVA 4D 310

VKVA 4E 355

VKVA 4D 355

Capacity diagram

Operating point

Downloads

Designation key

Series and modification	Casing material	Motor modification		Turbine standard size
		Number of poles	Phase
VENTS VKV: vertical air exhaust	_: steel with polymeric coating А: aluminum z: galvanized steel	2 4 6	Е: single-phase D: three-phase	190; 220; 225; 250; 280; 310; 355; 400; 450; 500; 560; 630; 710

BIM

Centrifugal roof fans VENTS VKVA series