VC 4-75 NZh #3.15 w/motor AIR 71 A4 0.55 kW 1500 rpm, execution 1

Series VC 4-75 NZH #3,15 low-pressure centrifugal fan (VR 88-72.1-5.5, VR 80-75-5) with corrosion-resistant electric motor Electric motor AIR 71 A4 0.55 Power kW 1500 Vol./Min, 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—where the corrosion resistance of stainless steel exceeds that of ordinary carbon steel—and which contain no fibrous materials, sticky substances, dust, or other solid impurities in quantities above 100 mg/m³ under moderate (U) climate (3rd placement category) and tropical (T) climate (2nd placement category) conditions in accordance with DSTU 15150.

The centrifugal fan VC 4-75 NZH #3,15 (VR 88-72.1-5.5, VR 80-75-5) consists of the following modular components available separately:

• Fan assembly VC 4-75 NZH #3,15 without electric motor
• Impeller wheel VC 4-75 NZH #3,15 (VR 88-72.1-5.5)
• Scroll casing VC 4-75 NZH #3,15 (VR 80-75-5)
• Electric motor Electric motor AIR 71 A4 0.55 Power kW 1500 Vol./Min for fan VC 4-75 NZH #3,15

General characteristics of series VC 4-75 NZh #3.15 w/motor AIR 71 A4 0.55 kW 1500 rpm fans (VR 88-72.1-5.5, VR 80-75-5):

• Low pressure
• Single-sided suction
• Backward-curved blades
• 12 blades
• Right- and left-hand rotation
• Manufactured according to TU U 28.2-24881057-003:2023
• Construction material: AISI 403 stainless steel

Purpose: The VC 4-75 NZh #3.15 w/motor AIR 71 A4 0.55 kW 1500 rpm stainless-steel centrifugal fan is intended for moving air and other gas mixtures contaminated with aggressive gases and vapors—where stainless steel’s resistance exceeds that of ordinary steel—and which contain no sticky substances, fibrous materials, dust, or other solid impurities in quantities above 100 mg/m³.

Applications:

• Air-conditioning systems
• Ventilation systems
• Air-heating systems
• Other sanitary and industrial purposes

Operating conditions: Operates under moderate climate conditions at ambient temperatures from −40 °C to +40 °C. The temperature of the conveyed medium must not exceed 80 °C.

Principle of operation: Air, by energy imparted by the impeller blades, enters the fan under centrifugal force at a 90° angle and is directed radially into the spiral casing; within the casing, the pressurized air follows a spiral path and is discharged through the outlet.

Delivery set:

• Spiral casing
• Impeller wheel (front and rear discs, 12 blades, hub)
• Support frame (welded stand with mounting hole for vibration isolators or foundation)
• Collector (conical, attached to inlet nozzle; overlap adjusted by axial movement)
• Electric motor Electric motor AIR 71 A4 0.55 Power kW 1500 Vol./Min

Position of radial fan casing (viewed from the suction side): right rotation (PR) or left rotation (LIV).

Placement categories (detailed):

1st category: Operation in the open air (exposed to the combination of climatic factors characteristic of the macroclimate region).

2nd category: Operation under a canopy or in semi-enclosed spaces where temperature and humidity fluctuations do not differ significantly from outdoors, but with protection from direct sunlight and precipitation (e.g., tents, vehicle bodies, trailers, uninsulated metal enclosures, housings of 1st-category equipment).

3rd category: Operation in enclosed spaces with natural ventilation without artificial climate control, where temperature and humidity fluctuations and the influence of sand and dust are significantly lower than outdoors (e.g., insulated metal, stone, concrete, or wooden enclosures with no direct exposure to precipitation or sunlight; reduced wind; minimal moisture condensation).

4th category: Operation in spaces with artificially regulated climate (heated or cooled and ventilated industrial premises, air-conditioned or partially air-conditioned halls, well-ventilated underground areas; no direct sunlight, precipitation, wind, sand, or dust).

5th category: Operation in high-humidity spaces (e.g., unheated and unventilated underground spaces such as mines, basements, earth-covered structures, ship holds; areas prone to prolonged water accumulation or frequent moisture condensation on walls and ceilings; textile or hydrometallurgical workshops).