The Chromalox SDRA SuperDragon is a
rugged, self contained, mobile electric
blower heater that can be used with or without
optional inlet or outlet 20” diameter flexible
duct. The SDRA units can be used for comfort
heating or process heating temperatures to
180˚F, and can be located in an ambient of up
to 130˚F. The SDRA includes a fan only switch,
that allows the unit to be used to recirculate
room air, supply fresh air source, or capture
fume exhaust. The SDRA heaters provide for
easily adjustable airflow for a wide variety of
applications including flexible ducting up to
165 feet in length. Each unit includes two thermostats
to enable the operator to set the maximum
inlet and outlet temperatures, magnetic
contactor(s), a 120 volt control transformer,
power on pilot lights and a high limit cutout to
protect the heater against unintended low air
flow conditions. The SDRA can be left unattended
without the threat of fire or by-product
of combustion from fuel fired heaters. The
bright red polyester powder coated heater can
be easily moved because of two 10” diameter
pneumatic wheels on the outlet and a 4” lockable
swivel castor on the inlet.
- Aircraft Cabin Heating
- Plant Maintenance
- Building Construction Sites
- Curing Plaster and Concrete
- Warming Workers
- Drying After Flood Damage
- Insect Control in Grain Mills
- Thawing Frozen Pipes
- Recirculating Fresh Air
- Exhaust for Comtaminated Air
For for Application information refer to Catalog Page PDF to the right.
Heating Section
A structural frame consisting of 2 spun steel
rings and formed steel channels support a
20 gauge steel cylinder phosphate coated
for corrosion resistance and finished in red
polyester powder coat paint. The cylinder
contains patented metal sheath Fintube®
heating elements that include industrial grade
.475” diameter steel sheath tubular heaters
with furnace brazed steel fins for maximum
heat transfer. The elements are firmly attached
to a robust steel assembly with steel bulkhead
threaded fittings.
Fan Section
The fan assembly includes a 16” tubeaxial
fan designed for industrial use and includes a
streamlined belt tunnel that isolates the motor,
drives and bearings from the air stream.
The fan blades are precision balanced made
with spark resistant aluminum and includes
permanently lubricated ball bearings. Safety
belt guards are supplied to protect operating
personnel from harm. The drip proof motor
is rated 1hp, 3 phase 1,725 rpm and operates
on line voltage. Fan speed can be varied from
1,500 to 2,300 RPM for various air flows by
use of adjustable pulleys.
Controls
Two adjustable thermostats (60 to 180˚F) are
located on the heater cylinder to allow the
inlet and outlet temperatures to be adjustable
for single pass heating or recirculated air
temperature control. The power is switched
by magnetic contactor(s) which are located in
a gasketed NEMA 4 enclosure along with the
motor starter, control voltage transformer and
heater power fusing. A fan only toggle switch
and pilot lights for power and heater are also
located in the enclosure.
Safety Guards
Front and rear grills are 10 gauge, finished
in black polyester powder coat paint and are
designed to meet OSHA requirements.