Air pressurization fans УВОП (UVOP).
Air pressurization fans are designed to supply fresh air to fire protection systems in case of fire. They can also be used in general ventilation systems (equipment may be installed with a short ductwork).
A nozzle on the intake of the air pressurization fan is required to regulate air flow and reduce input resistance. It should be used if the fan is the first device in a circuit.
An output diffuser on the air pressurization fan is required to reduce pressure losses in the discharge manifold.