Low-pressure centrifugal fan of the VC 4-75 #4 series (VR 88-72.1-5.5, VR 80-75-5) with electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min made of dissimilar materials for explosive environments
This fan is intended for ventilation or air conditioning systems that handle explosive gas-vapor-air mixtures of categories 1 and 2, groups T1, T2, T3 according to the "Rules for Electrical Installations" (PUE). These mixtures do not cause accelerated corrosion of materials in the flow part of the fan. The temperature of such mixtures must not exceed 80 °C, and the content of fibrous materials, sticky substances, dust, and other solid particles must not exceed 100 mg/m³ under moderate (U) climate conditions (placement category 3) and tropical (T) climate (placement category 2) as per DSTU 15150. The permissible ambient temperature is from -40 °C to +40 °C (+40 °C when equipped with tropical-design electric motors).
The casing and impeller blades of explosion-proof fans are made from material pairs (steel-brass or steel-aluminum) that do not pose a risk of ignition from friction sparks in accordance with DSTU 22782.0-81.
The centrifugal fan VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) consists of the following units available separately:
- Fan VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) without electric motor
- Impeller VC 4-75 #4 (VR 88-72.1-5.5)
- Fan casing VC 4-75 #4 (VR 80-75-5)
- Electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min for fan VC 4-75 #4
General characteristics of centrifugal fans VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) with electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min made from dissimilar metals:
- Low pressure
- Single-sided suction
- Backward-curved blades
- 12 blades
- Rotation direction: right or left
- Manufactured according to TU U 28.2-24881057-003:2023
- Material: dissimilar metals
Application of centrifugal fans VC 4-75 VZ #4 w/motor 4VR 90 L2 3 kW 3000 rpm (VR 88-72.1-5.5, VR 80-75-5):
- Air conditioning systems
- Ventilation systems
- Air heating systems
- Other sanitary and industrial purposes
The centrifugal fan VC 4-75 VZ #4 w/motor 4VR 90 L2 3 kW 3000 rpm operates under 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 VZ #4 w/motor 4VR 90 L2 3 kW 3000 rpm:
Air enters the fan due to centrifugal force at a 90-degree angle after receiving energy from the impeller blades. It then moves radially toward the spiral casing and, while traveling along the spiral-shaped housing, is discharged through the outlet under pressure.
Completeness of centrifugal fan VC 4-75 #4 made from dissimilar metals:
- Spiral casing
- Impeller
- Welded frame
- Collector
- Electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min
The impeller consists of a front and rear disc, 12 sheet blades, and a hub.
The welded frame has a base with a hole for mounting on vibration isolators or a foundation. The electric motor and cover are mounted on the frame.
The conical air inlet collector is fixed to the inlet pipe. The gap between the collector and the front impeller disc is adjusted by axially shifting the collector inside the inlet pipe.
Fan casing position (viewed from the suction side):
- a) Right-hand rotation
- b) Left-hand rotation
The casing and impeller blades of explosion-proof fans are made from material pairs (steel-brass or steel-aluminum) that do not pose a risk of ignition from friction sparks in accordance with DSTU 22782.0-81.
The centrifugal fan VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) consists of the following units available separately:
- Fan VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) without electric motor
- Impeller VC 4-75 #4 (VR 88-72.1-5.5)
- Fan casing VC 4-75 #4 (VR 80-75-5)
- Electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min for fan VC 4-75 #4
General characteristics of centrifugal fans VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) with electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min made from dissimilar metals:
- Low pressure
- Single-sided suction
- Backward-curved blades
- 12 blades
- Rotation direction: right or left
- Manufactured according to TU U 28.2-24881057-003:2023
- Material: dissimilar metals
Application of centrifugal fans VC 4-75 VZ #4 w/motor 4VR 90 L2 3 kW 3000 rpm (VR 88-72.1-5.5, VR 80-75-5):
- Air conditioning systems
- Ventilation systems
- Air heating systems
- Other sanitary and industrial purposes
The centrifugal fan VC 4-75 VZ #4 w/motor 4VR 90 L2 3 kW 3000 rpm operates under 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 VZ #4 w/motor 4VR 90 L2 3 kW 3000 rpm:
Air enters the fan due to centrifugal force at a 90-degree angle after receiving energy from the impeller blades. It then moves radially toward the spiral casing and, while traveling along the spiral-shaped housing, is discharged through the outlet under pressure.
Completeness of centrifugal fan VC 4-75 #4 made from dissimilar metals:
- Spiral casing
- Impeller
- Welded frame
- Collector
- Electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min
The impeller consists of a front and rear disc, 12 sheet blades, and a hub.
The welded frame has a base with a hole for mounting on vibration isolators or a foundation. The electric motor and cover are mounted on the frame.
The conical air inlet collector is fixed to the inlet pipe. The gap between the collector and the front impeller disc is adjusted by axially shifting the collector inside the inlet pipe.
Fan casing position (viewed from the suction side):
- a) Right-hand rotation
- b) Left-hand rotation
Notes on placement categories based on climate conditions:
Category 1: For outdoor use, exposed to all climatic factors typical of the respective macroclimatic region.
Category 2: For use under canopies or in rooms where temperature and humidity variations are minimal and access to outdoor air is relatively unrestricted (e.g., tents, containers, uninsulated metal enclosures).
Category 3: For indoor use with natural ventilation and without controlled climate, in areas with reduced exposure to dust, moisture, and temperature fluctuations (e.g., insulated metal, stone, concrete, or wooden buildings).
Category 4: For use in rooms with controlled climates (e.g., heated, cooled, or ventilated production areas, well-ventilated underground rooms).
Category 5: For use in high-humidity environments (e.g., unheated and unventilated underground rooms, mines, basements, soil structures, ship compartments, and areas with frequent condensation or water presence).
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Low-pressure centrifugal fan of the VC 4-75 #4 series (VR 88-72.1-5.5, VR 80-75-5) with electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min made of dissimilar materials for explosive environments
This fan is intended for ventilation or air conditioning systems that handle explosive gas-vapor-air mixtures of categories 1 and 2, groups T1, T2, T3 according to the "Rules for Electrical Installations" (PUE). These mixtures do not cause accelerated corrosion of materials in the flow part of the fan. The temperature of such mixtures must not exceed 80 °C, and the content of fibrous materials, sticky substances, dust, and other solid particles must not exceed 100 mg/m³ under moderate (U) climate conditions (placement category 3) and tropical (T) climate (placement category 2) as per DSTU 15150. The permissible ambient temperature is from -40 °C to +40 °C (+40 °C when equipped with tropical-design electric motors).
The casing and impeller blades of explosion-proof fans are made from material pairs (steel-brass or steel-aluminum) that do not pose a risk of ignition from friction sparks in accordance with DSTU 22782.0-81.
The centrifugal fan VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) consists of the following units available separately:
- Fan VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) without electric motor
- Impeller VC 4-75 #4 (VR 88-72.1-5.5)
- Fan casing VC 4-75 #4 (VR 80-75-5)
- Electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min for fan VC 4-75 #4
General characteristics of centrifugal fans VC 4-75 #4 (VR 88-72.1-5.5, VR 80-75-5) with electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min made from dissimilar metals:
- Low pressure
- Single-sided suction
- Backward-curved blades
- 12 blades
- Rotation direction: right or left
- Manufactured according to TU U 28.2-24881057-003:2023
- Material: dissimilar metals
Application of centrifugal fans VC 4-75 VZ #4 w/motor 4VR 90 L2 3 kW 3000 rpm (VR 88-72.1-5.5, VR 80-75-5):
- Air conditioning systems
- Ventilation systems
- Air heating systems
- Other sanitary and industrial purposes
The centrifugal fan VC 4-75 VZ #4 w/motor 4VR 90 L2 3 kW 3000 rpm operates under 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 VZ #4 w/motor 4VR 90 L2 3 kW 3000 rpm:
Air enters the fan due to centrifugal force at a 90-degree angle after receiving energy from the impeller blades. It then moves radially toward the spiral casing and, while traveling along the spiral-shaped housing, is discharged through the outlet under pressure.
Completeness of centrifugal fan VC 4-75 #4 made from dissimilar metals:
- Spiral casing
- Impeller
- Welded frame
- Collector
- Electric motor Electric motor 4VR 90 L2 3.0 Power kW 3000 Vol./Min
The impeller consists of a front and rear disc, 12 sheet blades, and a hub.
The welded frame has a base with a hole for mounting on vibration isolators or a foundation. The electric motor and cover are mounted on the frame.
The conical air inlet collector is fixed to the inlet pipe. The gap between the collector and the front impeller disc is adjusted by axially shifting the collector inside the inlet pipe.
Fan casing position (viewed from the suction side):
- a) Right-hand rotation
- b) Left-hand rotation
Notes on placement categories based on climate conditions:
Category 1: For outdoor use, exposed to all climatic factors typical of the respective macroclimatic region.
Category 2: For use under canopies or in rooms where temperature and humidity variations are minimal and access to outdoor air is relatively unrestricted (e.g., tents, containers, uninsulated metal enclosures).
Category 3: For indoor use with natural ventilation and without controlled climate, in areas with reduced exposure to dust, moisture, and temperature fluctuations (e.g., insulated metal, stone, concrete, or wooden buildings).
Category 4: For use in rooms with controlled climates (e.g., heated, cooled, or ventilated production areas, well-ventilated underground rooms).
Category 5: For use in high-humidity environments (e.g., unheated and unventilated underground rooms, mines, basements, soil structures, ship compartments, and areas with frequent condensation or water presence).
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Notes on placement categories based on climate conditions:
Category 1: For outdoor use, exposed to all climatic factors typical of the respective macroclimatic region.
Category 2: For use under canopies or in rooms where temperature and humidity variations are minimal and access to outdoor air is relatively unrestricted (e.g., tents, containers, uninsulated metal enclosures).
Category 3: For indoor use with natural ventilation and without controlled climate, in areas with reduced exposure to dust, moisture, and temperature fluctuations (e.g., insulated metal, stone, concrete, or wooden buildings).
Category 4: For use in rooms with controlled climates (e.g., heated, cooled, or ventilated production areas, well-ventilated underground rooms).
Category 5: For use in high-humidity environments (e.g., unheated and unventilated underground rooms, mines, basements, soil structures, ship compartments, and areas with frequent condensation or water presence).
