Vents VK 250 B fan is a low noise version of the VK 250 fan (47 dBA). Fans are used in supply and exhaust ventilation systems for residential, commercial and industrial premises. Compatible with air ducts with a diameter of 250 mm.
Thanks to the housing made of high-quality plastic, which, unlike metal, is not subject to corrosion, they are an excellent choice for installation in exhaust ventilation systems for rooms with high humidity: bathrooms, kitchens, etc.
Specifications
| Parameter | Value |
| Voltage, V | 230 |
| Current frequency, Hz | 50 |
| Maximum power, W | 108 |
| Productivity, m3/h | 865 |
| Current, A< br> | 0.47 |
| Rotation speed, min-1 | 2560 |
| Noise level at a distance of 3 m, dB(A) | 47 |
| Maximum temperature of transported air, C | -25...+50 |
| Weight, kg | 4.3 |
| Protection, class | IPХ4 |
| Pipe size, mm | 250 |
Dimensions
| Dimensions | ?D | ?D1 | B | L | L1 | L2 | L3 |
| mm | 250 | 340 | 354 | 265 | 30 | 30 | 40 |
Aerodynamic characteristics diagram
Design
The Vents VK 250 B fan housing is made of high-quality and highly durable ABS plastic. Sealed mounting box. For more convenient connection and use, the fan can be equipped with a power cord with a plug (VK&hellip,P).
Motor
Single-phase external rotor motors are equipped with a centrifugal impeller with backward-curved blades. The motors have built-in thermal protection with automatic restart. For some standard sizes, a motor version with more powerful characteristics (VKS) is available.
The motors are equipped with rolling bearings to ensure a longer service life (40,000 hours). To achieve precise performance, safe operation and low noise levels, each turbine undergoes dynamic balancing during assembly. Motor protection class – IP X4.
Speed adjustment
Smooth or step adjustment is carried out using a thyristor or autotransformer regulator. Several fans can be connected to one control device, provided that the total power and operating current do not exceed the rated parameters of the controller.
It is possible to use a speed controller (supplied separately) RS-1-300
Installation
Installation at any angle relative to the fan axis is allowed. Connection to a wall or ceiling is carried out using mounting brackets (included in delivery)
Electrical connection and installation must be carried out in accordance with the instructions and electrical diagram indicated on the terminal box.
Installation example
Fan passport
