The medium-pressure centrifugal fan of the VC 14-46 VZ (VZI) #2,5 series (VR-287-46.1) with the Electric motor 4VR 71 B4 0.75 Power kW 1500 Vol./Min electric motor, manufactured from dissimilar materials, is intended for use in explosive atmospheres.
The VC 14-46 VZ (VZI) #2,5 fan (VR-287-46.1) is designed for ventilation or air conditioning systems of explosive gas-vapor-air mixtures of categories 1 and 2, groups T1, T2, T3, according to the "Rules for Electrical Installations" (REI), which do not cause accelerated corrosion of the flow part materials of the fans (air aggressiveness up to 80 °C), and do not contain fibrous materials, sticky substances, dust, or other solid impurities in concentrations exceeding 100 mg/m³, in moderate (U) climate conditions (placement category 3) and tropical (T) climate (placement category 2) according to DSTU 15150.
The ambient temperature should be between -40 °C and +40 °C (+40 °C when equipped with tropical-version electric motors).
The housings and impeller blades of explosion-proof fans are manufactured from material pairs (steel-brass or steel-aluminum) that do not pose a hazard of ignition from friction sparks according to DSTU 22782.0-81.
This model is an analogue of medium-pressure centrifugal fans: VR-287-46.1, VR 320-46, VR-300-46, VR 300-45, VR 289-46, VR 15-45.
The centrifugal fan VC 14-46 VZ (VZI) #2,5 (VR-287-46.1) consists of the following units, which can be purchased separately:
- Fan VC 14-46 VZ (VZI) #2,5 (VR-287-46.1) without electric motor
- Impeller of the fan VC 14-46 VZ (VZI) #2,5 (VR-287-46.1)
- Fan casing (housing) VC 14-46 VZ (VZI) #2,5 (VR-287-46.1)
- Electric motor Electric motor 4VR 71 B4 0.75 Power kW 1500 Vol./Min for the fan VC 14-46 VZ (VZI) #2,5
General information about centrifugal fans VC 14-46 VZ (VZI) #2.5 w/motor 4VR 71 B4 0.75 kW 1500 rpm (VR-287-46.1):
- Medium pressure
- Single-side suction
- Spiral rotary housing
- Forward-curved blades
- Number of blades: 32 pcs.
- Rotation direction: right and left
- Manufactured in accordance with TU 22-54.36-83
- Material: dissimilar metals
Purpose of centrifugal fans VC 14-46 VZ (VZI) #2.5 w/motor 4VR 71 B4 0.75 kW 1500 rpm (VR-287-46.1) made of dissimilar materials:
The centrifugal fan VC 14-46 VZ (VZI) #2.5 w/motor 4VR 71 B4 0.75 kW 1500 rpm is designed for ventilation or air conditioning systems of explosive gas-vapor-air mixtures of categories 1 and 2, groups T1, T2, T3, according to the "Rules for Electrical Installations" (REI), which do not cause accelerated corrosion of the flow part materials of the fans (air aggressiveness up to 80 °C), and do not contain fibrous materials, sticky substances, dust, or other solid impurities in concentrations not exceeding 100 mg/m³, in moderate (U) climate conditions (placement category 3) and tropical (T) climate (placement category 2) according to DSTU 15150.
The ambient temperature should be from -40 °C to +40 °C (+40 °C when equipped with tropical-version electric motors).
Centrifugal fans VC 14-46 VZ (VZI) #2.5 w/motor 4VR 71 B4 0.75 kW 1500 rpm (VR-287-46.1) are used in:
- Air conditioning systems
- Ventilation systems
- Air heating systems
- Other sanitary and industrial applications
The centrifugal fan VC 14-46 VZ (VZI) #2.5 w/motor 4VR 71 B4 0.75 kW 1500 rpm (VR-287-46.1) with the Electric motor 4VR 71 B4 0.75 Power kW 1500 Vol./Min electric motor is operated 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 14-46 VZ (VZI) #2.5 w/motor 4VR 71 B4 0.75 kW 1500 rpm (VR-287-46.1) made of dissimilar materials:
Air, by receiving energy from the impeller blades, enters the fan under the influence of centrifugal force at a 90-degree angle and moves radially into the spiral casing; in the casing, moving along the spiral-shaped housing, it is directed under pressure through the fan exhaust.
Configuration of the centrifugal fan VC 14-46 VZ (VZI) #2.5 w/motor 4VR 71 B4 0.75 kW 1500 rpm (VR-287-46.1) made of dissimilar materials with the Electric motor 4VR 71 B4 0.75 Power kW 1500 Vol./Min electric motor:
The VC 14-46 VZ (VZI) #2,5 (VR-287-46.1) fan, equipped with the Electric motor 4VR 71 B4 0.75 Power kW 1500 Vol./Min electric motor, consists of the following main units:
- Spiral casing
- Impeller
- Base frame
- Collector
- Electric motor Electric motor 4VR 71 B4 0.75 Power kW 1500 Vol./Min
The impeller consists of a front and rear disc, 32 sheet blades, and a hub.
The fan frame is welded. The base has an opening for installation on vibration isolators or a foundation. The electric motor and cover are mounted on the frame.
The conical collector for air supply to the impeller is attached to the inlet pipe. The gap between the collector and the front disk of the impeller is adjusted by axial movement of the collector in the inlet pipe.
Position of the casing of radial fans with right (PR) and left (LIV) rotation, view from the suction side:
- a) right rotation
- b) left rotation
Note regarding placement categories depending on climatic conditions:
- Category 1: For outdoor use (exposure to the full range of climatic factors typical of the given macroclimatic region);
- Category 2: For use under a shelter or in premises where temperature and humidity fluctuations do not significantly differ from those outdoors and where there is relatively free access to outside air, such as tents, van bodies, trailers, uninsulated metal premises, as well as the enclosure of a complete product of category 1 (no direct exposure to sunlight or precipitation);
- Category 3: For use in enclosed spaces with natural ventilation, without artificially controlled climate conditions, where temperature and humidity fluctuations and the influence of sand and dust are significantly less than outdoors, such as in insulated metal, stone, concrete, or wooden premises (no exposure to precipitation, direct sunlight; significant reduction in wind; significant reduction or absence of scattered sunlight and moisture condensation);
- Category 4: For use in premises with artificially controlled climate conditions, e.g., closed, heated or cooled and ventilated industrial spaces, in premises with conditioned or partially conditioned air, and other, including well-ventilated underground premises (no direct exposure to sunlight, precipitation, wind, sand, and outside air dust; absence or significant reduction of scattered sunlight and moisture condensation);
- Category 5: For use in premises with high humidity (e.g., unheated and unventilated underground spaces, including mines, basements, in the ground, in ship holds and other spaces where water may be present for long periods or frequent moisture condensation on walls and ceilings, particularly in some holds, certain workshops of textile, hydrometallurgical production, etc.).
