VC 4-75 #4 w/motor AIR 90 L4 2.2 kW 1500 rpm, execution 1

Series VC 4-75 #4 low-pressure centrifugal fan (VR 88-72.1-5.5, VR 80-75-5) with electric motor Electric motor AIR 90 L4 2.2 Power kW 1500 Vol./Min, manufactured from dissimilar materials for explosive atmospheres.

Intended Application:

This fan is designed for ventilation or air-conditioning systems handling gas–steam–air explosive mixtures of the 1st and 2nd categories (groups T1, T2, T3) according to the “Rules for Electrical Installations” (PVE), which do not cause accelerated corrosion of the flow-path materials. These mixtures must not exceed a temperature of 80 °C, and the content of fibrous materials, sticky substances, dust, and other solid impurities must not exceed 100 mg/m³ under moderate (U) climate (placement category 3) and tropical (T) climate (placement category 2). Ambient temperature is permitted from −40 °C to +40 °C (+40 °C when equipped with tropical-design electric motors).

Housing and Impeller Blade Material:

The housing and impeller blades of these explosion-proof fans are made from material pairs (steel–brass or steel–aluminum) that form a non-sparking combination under frictional conditions.

Configuration and Modular Components (available separately):

• Fan assembly VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) without electric motor
• Impeller wheel of fan VC 4-75 #4 (VR 88-72.1-5.5)
• Fan scroll casing VC 4-75 #4 (VR 80-75-5)
• Electric motor AIR 90 L4

General Characteristics of Series VC 4-75 #4 Centrifugal Fans with Electric motor AIR 90 L4 2.2 Power kW 1500 Vol./Min, Manufactured from Dissimilar Metals:

• Low pressure
• Single-sided suction
• Backward-curved blades
• Number of blades: 12
• Direction of rotation: right and left
• Execution scheme № 5 with V-belt drive
• Construction material: dissimilar metals

Applications of Series VC 4-75 #4 w/motor AIR 90 L4 2.2 kW 1500 rpm Fans (VR 88-72.1-5.5, VR 80-75-5):

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

Operating Conditions:

Series VC 4-75 #4 w/motor AIR 90 L4 2.2 kW 1500 rpm centrifugal fans operate 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 means of energy imparted by the impeller blades, enters the fan under centrifugal force at a 90° angle and is directed radially into the scroll-shaped casing. Within the casing, the pressurized air follows a spiral path and is discharged through the fan outlet.

Delivery Set of Series VC 4-75 #4 Fans Made of Dissimilar Metals:

• Scroll-shaped casing
• Impeller wheel (front and rear discs, 12 sheet blades, and hub)
• Support frame (welded stand with hole for mounting on vibration isolators or foundation)
• Collector (conical, attached to the inlet nozzle; overlap between collector and impeller front disc is adjusted by axial movement within the inlet nozzle)
• Electric motor Electric motor AIR 90 L4 2.2 Power kW 1500 Vol./Min

Position of Radial Fan Housings for Right (PR) and Left (LIV) Rotation, Viewed from the Suction Side:

• Right rotation
• Left rotation