VENTS VKF 4E 450 – Axial duct fan Ø450 mm, 4680 m³/h

VENTS VKF 4E 450 is part of the VENTS OV / OVK / VKF industrial axial fan series. The main difference of the VKF is the design, designed for direct installation in a ventilation duct , which allows its easy integration into supply and exhaust ventilation systems.

The fan is suitable for applications where a large amount of air must be moved with relatively low system resistance . At 50 Hz power supply, the model reaches a maximum air flow rate of 4680 m³/h , with the motor operating at approximately 1350 rpm and consuming 250 W.

The design is designed with an emphasis on reliability during long-term operation. The housing and impeller are made of steel with a durable polymer coating , which provides mechanical strength and additional protection of metal surfaces.

The 4E model uses a four-pole single-phase asynchronous AC motor with an external rotor . The motor has built-in thermal overload protection and the ball bearings are designed for a long service life. The manufacturer specifies a design bearing life of at least 40,000 operating hours for the series.

Another important advantage is the possibility of speed regulation . By using a suitable thyristor or autotransformer regulator, the speed can be controlled smoothly or in steps. This allows the air flow rate to be adapted to the actual needs of the room.

The operating temperature range at 50 Hz is from -30°C to +60°C , which allows the fan to be used in a variety of conditions. The VKF series has a protection rating of IPX4 .

Technical characteristics

✔️ Manufacturer: VENTS
✔️ Series: VKF
✔️ Model: VKF 4E 450
✔️ Type: Axial duct fan
✔️ Installation: In air duct
✔️ Motor type: AC, asynchronous with external rotor
✔️ Number of poles: 4
✔️ Phases: 1
✔️ Power supply: 220–240 V
✔️ Frequency: 50/60 Hz
✔️ Power at 50 Hz: 250 W
✔️ Current consumption at 50 Hz: 1.2 A
✔️ Maximum air flow rate at 50 Hz: 4680 m³/h
✔️ RPM at 50 Hz: 1350 rpm
✔️ Noise level at 3 m: 56 dB(A)
✔️ Operating temperature at 50 Hz: -30 to +60°C
✔️ VKF protection level: IPX4
✔️ Bearings: Ball
✔️ Design life of bearings: minimum 40,000 hours .

When operating at 60 Hz

✔️ Power: 325W
✔️ Current: 1.46 A
✔️ Maximum flow rate: 4790 m³/h
✔️ RPM: 1600 rpm
✔️ Noise level at 3 m: 57 dB(A)
✔️ Transported air temperature: -30 to +50°C.

📐 Dimensions and weight

For the VKF 4E 450, the official manual states:

📦 The set includes

✔️ 1 × VENTS VKF 4E 450 axial fan

✔️ Factory-installed motor and impeller

✔️ Terminal box for electrical connection

The speed controller and the other components of the air duct system are used separately according to the specific installation.

Advantages

✔️ High air flow rate – up to 4680 m³/h

✔️ Direct installation in ventilation duct

✔️ Sturdy steel construction

✔️ Protective polymer coating

✔️ Single-phase AC motor with external rotor

✔️ Built-in thermal protection against overheating

✔️ Ball bearings for long-lasting operation

✔️ Possibility to adjust the speed

✔️ Operating range up to +60°C at 50 Hz

✔️ Suitable for professional supply and exhaust systems.

🔧 Application

VENTS VKF 4E 450 is suitable for:

• Greenhouses
• Nurseries
• Warehouses
• Production premises
• Workshops
• Technical premises
• Commercial and industrial sites
• Supply ventilation
• Suction ventilation
• Ventilation systems requiring high air flow rates.

📋 Installation and use

1. Choose a suitable location in the ventilation system.
2. Install the fan securely in the appropriate air duct.
3. Match the airflow direction to the marking on the housing.
4. Perform the electrical connection according to the diagram and the official VENTS manual.
5. If necessary, add a compatible speed controller.
6. After installation, check for vibration, unusual noise and correct airflow direction.
7. Perform periodic maintenance and cleaning of the impeller.

⚠️ Important: The VKF 4E 450 is a high-flow axial fan , designed primarily for systems with relatively low aerodynamic resistance. In systems with high pressure drop, multiple elbows, long ducts or highly restrictive filters, it is important to size the fan according to the actual operating point, and not only according to the maximum free flow rate.

💡 Tip from Urban Botaniks: When designing greenhouse or professional ventilation, do not choose the fan only based on the indicator 4680 m³/h . Take into account the diameter and length of the air ducts, the number of bends, grilles and other resistances in the system to get the required real