Low-pressure centrifugal fans VC 4-75

Radial Low-Pressure Fans VC 4-75 (VC 4-70)

VC 4-75 is an industrial radial low-pressure fan designed for operation in ventilation, heating, and technological systems. Reliable design, high efficiency, and stable characteristics have made the VC 4-75 centrifugal fan popular. Various modifications of VC 4-75 are used for moving air and other gas mixtures that do not contain aggressive substances or large amounts of dust.

Centrifugal Fans — Design Features and Operating Principle

The main element of the unit is an impeller with twelve backward-curved blades. It is the movement of the impeller that creates pressure and ensures an efficient airflow. During fan rotation, air is sucked into the center of the casing, after which, under the action of centrifugal force, it is directed to the outlet. The steel casing of the device has an anti-corrosion coating, which significantly increases the equipment's service life. All centrifugal fans have the option of right-hand or left-hand rotation, so they are conveniently mounted in any ventilation systems. Thanks to the precise balancing of the impeller, aerodynamic characteristics do not change over the years. This allows industrial VC 4-75 fans to be used under continuous load for decades. The Ventilator.ua online store offers to buy a radial fan VC 4-75 (VC 4-70) online. Customers have access to specialist consultation, a guarantee for VC 4-75 fans, and favorable prices in Kharkiv, Dnipro, Lviv, Cherkasy, Poltava, or Kyiv.

VC 4-75 / VC 4-70 Series — Purpose of Radial Low-Pressure Fans

Ventilator.ua produces VC 4 fans in four varieties, each of which has its own characteristics:

• carbon steel — a universal type for most industrial premises with neutral air;
• stainless steel — resistant to aggressive and chemically active environments;
• dissimilar metals — intended for operation in explosive premises where gas vapor formation is possible;
• aluminum alloys — a lightweight option for explosive environments, reducing the risk of sparking and the load on the motor.

VC 4-75 and VC 4-70 fans are designed to work with gaseous mixtures with limited dust and solid impurity content — no more than 100 mg/m³. They are used in industrial buildings, air heating systems, foundries, ventilation equipment, and laboratories.

Main Characteristics and Advantages of VC 4-75 and VC 4-70 Fans

Centrifugal fans VC 4-75 have high efficiency with relatively low energy consumption. The impeller of the fan is carefully balanced, which prevents vibrations. The well-thought-out design ensures smooth blade rotation, which reduces the noise level. For VC 4-75 No. 4 and VC 4-75 No. 5 fans, a change in the rotation direction is provided. The units are equipped with motors with a capacity from 3 to 11 kW, allowing adaptation to different technological requirements. Advantages of VC 4-75 series fans:

• resistance of the steel casing with anti-corrosion coating to temperature and humidity fluctuations;
• ability to work with air containing a small amount of dust;
• ease of installation due to different rotation directions;
• stability of parameters during long-term loads.

The products are easy to maintain — access to the impeller is simplified, and the design allows cleaning without dismantling the fan.

VC 4-75 — Climatic Requirements

It is recommended to use VC 4-75 fans in moderate climate conditions of the second and third placement categories in the temperature range from -40°C to +40°C. The airflow moved by the VC 4-75 fan should not exceed a temperature of +80°C. The presence of sticky substances, fibrous materials, excessive amounts of dust, and solid impurities is not allowed in the operating environment. This limitation is due to the impeller design, which ensures stable operation only with a clean airflow.

In moderate climate conditions of the first placement category, the operation of VC 4-75 fans is allowed in rooms fully protected from atmospheric precipitation:

• sealed production workshops;
• isolated industrial workshops;
• dry storage, mechanical, or electrical switchboard rooms;
• air heating and industrial ventilation systems;
• special drying chambers, painting, or boiler areas;
• basement and transport tunnels with a constant need for controlled air exchange.

Thus, in climate conditions of the first placement category, the operation of VC 4-75 (VC 4-70) is allowed in premises where a stable temperature regime is maintained and there is no moisture condensation. For regions with hot or excessively humid climates, special models for the tropics have been developed. Tropical-execution fans have an additional motor protection system against atmospheric influences.

Popular Models in the VC 4-75 and VC 4-70 Series

The Ventilator.ua plant produces radial fans VC 4-75 in more than three hundred modifications. Buyers have access to fast equipment delivery and the optimal manufacturer's price. They differ in frame sizes, motor power, and performance. KVZ products have a good reputation thanks to stable characteristics, high efficiency, and product durability. Among the models in particularly high demand are the VC 4-75 No. 4 and VC 4-75 No. 5 fans.

For powerful air heating systems of various industrial premises, the VC 4-75 No. 5 fan (electric motor AIR 90 L4 2.2 kW 1500 rpm) is suitable. The carbon steel unit is equipped with an AIR 80 B6 1.1 kW 1000 rpm electric motor. The device is created according to execution scheme 1. It ensures stable air supply and is suitable for moderate climate conditions of the second and third placement categories.

For less energy-intensive systems, it is recommended to choose the industrial VC 4-75 No. 4 (electric motor AIR 90 L2 3 kW 3000 rpm, carbon steel, placement category 2-3). The unit is manufactured according to scheme No. 1. The VC 4-75 No. 4 fan design is optimized for long-term uninterrupted operation at minimal energy costs.

How to Correctly Select a Low-Pressure Fan for Specific Tasks

Selecting a VC 4-75 fan depends on operating conditions, environmental characteristics, and ventilation system performance requirements. It is important to consider not only the type of room but also the presence of impurities in the air. Each climate category has its own limitations regarding temperature, humidity, operation duration, or fan features. For example, such as the VC 4-75 fan rotation direction, which affects the convenience of mounting in already existing air ducts. Before choosing a unit, one should analyze the aerodynamic resistance of the network and the required pressure that the fan must create.

It is important to determine the optimal operation point of the system to ensure maximum efficiency at minimal energy costs. For specific environments (for example, with high humidity or low dust content), it is recommended to clarify the permissible operation parameters in the technical documentation of the VC 4-75 fan. To choose the optimal fan, it is necessary to consider:

1. Electric motor power in kW — determines the volume of air that the unit can move.
2. Rotation frequency — affects pressure and noise level.
3. Wheel diameter — characterizes performance and operation stability.

Centrifugal VC 4-75 fans are used in ventilation systems where continuous operation is required. For cold regions, equipment with higher power motors is allowed, guaranteeing stable operation of VC 4-75 fans even under difficult conditions.

Why It Is Worth Buying VC Fans in Kyiv at Ventilator.ua

Ventilator.ua is the official manufacturer and supplier of VC 4-75 and VC 4-70 series industrial fans in Ukraine. The enterprise ensures a full cycle — from design and manufacture to equipment service maintenance. All products comply with industrial safety standards and undergo multi-level quality control.

On the Ventilator.ua website, you can buy VC 4-75 fans in Kyiv with delivery across Ukraine directly from the manufacturer. The company offers a wide range of proven ventilation equipment with an official warranty. Order a VC 4-75 low-pressure fan online.