Swinging Plenum Door

Swinging Paint Booth
Flexibility:
Our plenum swinging hangar door systems are available in many
configurations to meet your specific requirements. Having built swinging
plenum door systems over 30' tall, 85 feet in width, with door closed wind
speeds up to 140mph and operational wind speeds to 80mph, we are
confident that we can build a system that will meet your requirements and your
imagination.

Design:
Doors are designed using CAD and structural engineering software. Door
frame structure and connection designs are certified by an independent
engineer. Door frames are engineered using structural steel and cold formed
members per AISC and AISI codes. Structural steel members adjacent to the
air flow plenum are designed using structural steel tubing and steel pipe to
reduce air turbulence and drag. Standard filter size considered is 24" x 24",
however any size can be accomodated upon request. Wind loads are
calculated using your location and building size for the most accurate structural
loading possible. We don't make an assumption on the wind load by using an
arbitrary standard, we check every time.

Construction:
Door components are manufactured to the highest standards and designed to
be completely bolt together, avoiding costly delays due to welding inspections
and the availability of certified welders in the field. Door components are also
designed to have as few connections as possible, simplifying and increasing
assembly speed on the job. This lowers the total installed cost for your door
system.

Support Wheels:
We use hard rubber solid forklift style tires to support our swinging plenum
doors. These tires provide excellent grip to help the door achieve high
operational wind loads (rubber to concrete=60-70% weight to traction when dry,
steel to steel=10-20% weight to traction when dry, depending on condition of
wheel and steel rail). Our support guide wheel hubs are machined in house on
CNC lathes and assembled using taper roller bearings to transmit the vertical
forces imposed by the weight of the door and the lateral forces imposed by
wind and seismic loads. Support wheels are supplied with grease fittings
installed on the support axles and taper bearing adjusters. Support wheels can
be removed from the support outrigger through the top of the wheel box,
allowing bearing/axle maintenance without having to remove the door from the
track.

Locking System:
For exterior door systems (many of these doors have been installed behind
other doors or on the interior of a hangar) we provide hydraulic locking pins that
automatically extend when the door is reaches the closed position and
automatically retracts when the OPEN command is given. A light mounted at
the control push button station indicates the lock pin position so the operator
can verify the lock pin has fully deployed when the door is in the closed position.
Lock pin is equipped with a safety interlock so that door will not begin to open
until the pin lock has been fully retracted.

Drive System:
Drive motor(s) is installed onto a mounting plate that is adjustable for chain
tension. Drive motor has a worm gear drive gearbox and is equipped with a
motor brake that is directly mounted to the drive motor. Chain drive features an
overload clutch to prevent damage in the case of overloading. Overload clutch
is easily released, allowing manual operation in the event of a power failure.
Hydraulic drive motors are used so that there is no chance of spark producing
motor or high voltage wiring inside the paint booth area.

Weatherstrip:
Weatherstrip is 1/8" cloth inserted epdm. Weatherstrip meets military
specifications for durometer, UV resistance and incidental exposure to paint
thinners. Plenum doors are designed with double runs of weatherstrip to ensure
an air tight seal from the paint booth to the plenum door and to the building.
Retainer bar is fastened by zinc coated self drilling screws every 8" for a secure
seal without oil canning of retainer bar. Retainer bar is easily removed for
replacement of weatherstripping if it becomes necessary.

Electrical Controls:
Door control panels are manufactured in house using only the highest quality
UL listed components. Door control systems utilize electromechanical relays
that are highly resistant to electrical interference and have no programming that
can become corrupted requiring service. Control panels are mounted on the
exterior outrigger support frame so that the electrical controls are outside of the
paint booth area. All penetrations through the door frame are made using rigid
conduit with seal-offs installed at the bulkhead for hazardous location
compliance. Door control systems also utilize solid state proximity sensors for
limiting door travel. These sensors are water proof and have no moving parts to
wear out. Door control systems can be supplied ranging from 12VDC to
600VAC. Variable frequency drives are available for custom tuning or varying
of door drive speed. Variable frequency drives come with variable speed
buttons with 3 adjustable speed settings standard, 5 speeds as an option.

Power Feed:
Standard power feed system supplied is a drape cord design. The drape cord
is installed near the upper hinge so that the cord is up and out of harms way.
Seal-offs are supplied to make the power feed a complete hazardous location
installation. Rigid conduit is pre-installed in the door's base unit. Simply install
the vertical riser conduits where necessary and pull your wire. Hazardous
location junction boxes and seal offs are supplied for all conduit inside the door.

Standard options:
Timer delay with safety noisemaker and/or strobe light, safety edge with delay
and/or auto reverse, personnel door frames and safety interlock sensors,air
drive operating system, hydraulic drive operating system. Door drive motors
and control panels are fully assembled, wired and tested at our facility prior to
shipping.

Please call with your custom option requirements, we are here to create the
system that meets your needs and your imagination.