VC 4-70 VZ #2.5 w/motor 4VR 71 A2 0.75 kW 3000 rpm, execution 1

Series VC 4-70 VZ (vzryvozaschischennyj) #2,5 low-pressure centrifugal fan (VR 88‑72.1‑5.5, VR 80‑75‑5) with electric motor Electric motor 4VR 71 A2 0.75 Power kW 3000 Vol./Min, made of carbon steel for industrial use.

Intended Application:

This fan is designed for air ventilation and air-conditioning systems handling air and other gas mixtures with aggressiveness no greater than that of air at temperatures up to 80 °C towards carbon steel, and free of fibrous materials, sticky substances, dust, and other solid impurities not exceeding 100 mg/m³, under moderate (U) climate (placement category 3) and tropical (T) climate (placement category 2) conditions in accordance with DSTU 15150.

Component Breakdown (each sold separately):

• Fan assembly VC 4-70 VZ (vzryvozaschischennyj) #2,5 without electric motor
• Impeller wheel VC 4-70 VZ (vzryvozaschischennyj) #2,5 (VR 80‑75‑5)
• Fan casing (scroll) VC 4-70 VZ (vzryvozaschischennyj) #2,5 (VR 88‑72.1‑5.5)
• Electric motor Electric motor 4VR 71 A2 0.75 Power kW 3000 Vol./Min for fan VC 4-70 VZ (vzryvozaschischennyj) #2,5

General Characteristics of Series VC 4-70 VZ #2.5 w/motor 4VR 71 A2 0.75 kW 3000 rpm Fans:

• Low pressure
• Single-sided suction
• Backward-curved blades
• Number of blades: 12
• Direction of rotation: right and left
• Manufactured per TU U 28.2‑24881057‑003:2023
• Construction material: carbon steel

Applications:

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

Operating Conditions:

Series VC 4-70 VZ #2.5 w/motor 4VR 71 A2 0.75 kW 3000 rpm centrifugal fans operate under moderate climate conditions at ambient temperatures from −40 °C to +40 °C. The conveyed medium temperature must not exceed 80 °C.

Principle of Operation:

Air, receiving kinetic energy from the impeller blades, enters the fan under centrifugal force at 90° and is directed radially into the spiral scroll casing, where it follows a helical path under pressure and is discharged through the outlet.

Delivery Set:

• Spiral scroll casing
• Impeller wheel (front and rear discs, 12 blades, hub)
• Welded support frame with mounting hole for vibration isolators or foundation
• Conical collector attached to inlet nozzle with adjustable axial overlap
• Electric motor Electric motor 4VR 71 A2 0.75 Power kW 3000 Vol./Min

Housing Orientation for Right (PR) and Left (LIV) Rotation (view from suction side):

• Right rotation
• Left rotation

1st category: outdoor operation (exposed to all climatic factors);

2nd category: under canopy or in semi-open volumes with similar conditions to outdoors;

3rd category: enclosed volumes with natural ventilation;

4th category: artificially regulated climate spaces (conditioned or ventilated);

5th category: high-humidity spaces (mines, basements, ship holds, etc.).