NPFC - MIL-F-19004
FANS, CENTRIFUGAL, VENTILATION, NAVAL SHIPBOARD
|Publication Date:||18 April 1983|
This specification covers centrifugal fans, fixed and portable, for use in Naval shipboard heating, ventilating, and air conditioning systems.
Fan motor units specified herein are intended for ventilation and air conditioning applications only on board ships and craft of the United States Navy. Direction of airflow into and out of the... View More
Fan motor units specified herein are intended for ventilation and air conditioning applications only on board ships and craft of the United States Navy. Direction of airflow into and out of the fans is radial. Fans are of nonsparking construction. Fans with motors rated for 149°F ambient temperature are standard, except for type O fan which has an air turbine.
Type CC and X-CC fans are high efficiency units intended for systems having a resistance above 0.6 inch H2O and up to 1.74 inches H2O for the smallest fans and above 1.0 inch H2O and up to 5.3 inches H2O for larger fans. Type CC fans are nonsparking and shockproof. Type X-CC fans are nonsparking with service C motor.
Type O fan, available in a single size (rated at 750 ft /min and 3.0 inches H2O static pressure), is intended for emergency cooling of equipment and ventilation of nonventilated spaces. It is always used with ventilation hose, which may be attached to the fan inlet or outlet, or both ends. Exterior surfaces of the fan are of aluminum to avoid sparking when bumped against steel bulkhead.View Less