VC 4-75 NZh #5 w/motor AIR 80 A6 0.75 kW 1000 rpm, execution 1

Low-pressure corrosion-resistant centrifugal fan of the VC 4-75 NZh #5 w/motor AIR 80 A6 0.75 kW 1000 rpm series (VR 88-72.1-5.5, VR 80-75-5), made of AISI 403 stainless steel for aggressive environments.

This fan is designed for ventilation or air conditioning systems and other gas mixtures contaminated with aggressive gases and vapors, in which the resistance of stainless steel is higher than the resistance of ordinary quality steel, do not contain fibrous materials, sticky substances, dust, and other solid impurities not more than 100 mg/m³ under moderate (U) climate conditions (placement category 3) and tropical (T) climate (placement category 2).

The centrifugal fan VC 4-75 NZH #5 (VR 88-72.1-5.5, VR 80-75-5) consists of the following units, which can be purchased separately:

• fan VC 4-75 NZH #5 (VR 88-72.1-5.5, VR 80-75-5) without electric motor
• fan impeller VC 4-75 NZH #5 (VR 88-72.1-5.5)
• fan casing (housing) VC 4-75 NZH #5 (VR 80-75-5)
• Electric motor AIR 80 A6

General information about centrifugal fans VC 4-75 NZh #5 w/motor AIR 80 A6 0.75 kW 1000 rpm (VR 88-72.1-5.5, VR 80-75-5):

• Low pressure
• Single-sided suction
• Backward-curved blades
• Number of blades: 12
• Direction of rotation - right and left
• Material - stainless steel.

Purpose of centrifugal fans VC 4-75 NZh #5 w/motor AIR 80 A6 0.75 kW 1000 rpm (VR 88-72.1-5.5, VR 80-75-5):

The VC 4-75 NZh #5 w/motor AIR 80 A6 0.75 kW 1000 rpm centrifugal fan made of stainless steel is designed for moving air contaminated with aggressive gases and vapors, in which the resistance of stainless steel is higher than that of ordinary quality steel, does not contain sticky substances, fibrous materials, as well as dust and other solid impurities in an amount not exceeding 100 mg/m³.

Centrifugal fans VC 4-75 NZh #5 w/motor AIR 80 A6 0.75 kW 1000 rpm (VR 88-72.1-5.5, VR 80-75-5) are used in:

• air conditioning systems
• ventilation systems
• air heating systems
• for other sanitary and industrial purposes

The centrifugal fan VC 4-75 NZh #5 w/motor AIR 80 A6 0.75 kW 1000 rpm (VR 88-72.1-5.5, VR 80-75-5) is operated in moderate climate conditions at ambient temperatures from -40°C to +40°C. The temperature of the transported medium must not exceed 80 °C.

Operating principle of the centrifugal fan VC 4-75 NZh #5 w/motor AIR 80 A6 0.75 kW 1000 rpm (VR 88-72.1-5.5, VR 80-75-5):

Air, by transferring energy from the blades of the impeller, enters the fan under the influence of centrifugal force at a 90-degree angle and moves in a radial direction to the snail of the spiral casing. In the snail, moving along the spiral-shaped housing, the air under pressure is directed through the fan outlet.

Completeness of the centrifugal fan VC 4-75 NZh #5 w/motor AIR 80 A6 0.75 kW 1000 rpm (VR 88-72.1-5.5, VR 80-75-5):

• spiral casing,
• impeller,
• frame,
• collector,
• Electric motor AIR 80 A6

The impeller consists of front and rear discs, 12 sheet blades, and a hub. The frame of the fan is welded. The base has a hole for installation on vibration isolators or a foundation. The electric motor and cover are mounted on the frame. The conical collector for supplying air to the impeller is fixed to the inlet pipe. The overlap between the collector and the front disc of the impeller is adjusted by axial movement of the collector in the inlet pipe.

Position of the casings of radial fans with right (PR) and left (LIV) rotation, view from the suction opening: