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Our combination
facilities are designed bespoke to the clients particular
requirements incorporating many variances of airflow direction,
extraction rates, etc, with this in mind the following explanation
is for a particular facility. In the particular instance
of the facility featured we have included for extraction
from the booth via a pit constructed within the booth floor.
This is fitted with “Paint stop” EU2 filter media, a second
stage filter using PST290 EU3 media and have grids fitted
above the filter suitable for “man loading”. This layout
has two belt driven axial fans situated above tunnels running
from the pit to a location beyond the building wall. The
system has been calculated on a volume flow rate of 21m3/sec,
which equates to an air change rate of 3.5 air changes per
minute. We have undertaken an airflow analysis on the proposed
layout and all fans, burners and filter areas are designed
to achieve this figure. Control of the airflow through the
system is be by way of automatic, electronically controlled
multi-vane dampers.
When the unit is set to “Bake” mode the dampers automatically
alter to redirect the majority of the air to re-circulate
through the booth. This mode also incorporates a 10% air
bleed to atmosphere in order to comply with legislative
guidelines. The burner used on this project was a 2,200,000BTU/hr,
natural gas, modulating, induct typeRSP200. This is a “hi-spec”
burner for this application and its design minimises flame
chill and therefore cuts down burner emissions. There would
also be a sound attenuator adjacent to the input/recirc
fan.
The roof of the booth is made up of light steelwork frames
forming the inlet plenum. This plenum will incorporate filtration
to the full width of the booth utilising PST290 media rated
to EU3 standard. The main material for the roof panels is
1.2mm galvanised steel (single skin) and incorporate a number
of hinged explosion relief panels. The roof is insulated
after installation with foil backed mineral fibre sheet.
The walls of the installation are manufactured from “eurobond”
lamella panels with a white internal face (smooth polyester)
and galvanised outer face. The panels stand vertically and
are the full height of the booth. Vertical jointing of the
panels is via a pre formed “tongue and groove” edge. Lighting
is via standard fluorescent tube fittings, which are mounted
vertically in line with the panel arrangement and are staggered
high and low to create a uniform level of illumination.
Glazing of the light units is by Georgian wired Pyrosafe
roughcast glass.
The main doors are roller design. Along with these are 2
personnel doors, which would be placed in opposite corners
of the booth in order to conform to fire safety regulations.
The main door seal is via an extruded rubber section whilst
the bottom door seal will be facilitated by the use of brush
strips. The most reliable means of fastening doors of this
size is by means of espagnolette fasteners, one of which
would be fitted to each leaf.
The electrical installation is via a main control panel.
This has a full set of operator controls including temperature
regulation and keyed switch air balance control to adjust
the airflow thus allow for balancing of the system.
Our range
of dry filter units has been developed with the low to medium
user in mind. With an extract rate in advance of legislation
we feel that the performance of these units makes them one
of the best on the market. Unlike a number of our competitors,
our extract fans are rated to perform above legislative
standards with a semi blocked or dirty filter. This means
that in use, the operator works in a safe environment at
all times.
The AIRBLAST
No-Pump Water Wash unit is a product based on tried and
tested technology. The principle is based on splitting off
the top layer of water in the tank and lifting it, via fan
pressure, into the airflow. This scrubs the over spray out
of the air and captures it in the water, which then is then
removed from the airflow by means of several eliminator
plates. The water then returns to the tank via a drainage
system.
As the water level and air pressure in the scrub chamber
are critical, an automatic depression control valve assembly
mounted on the side of the unit regulates them, thus removing
the possibility of operator error.
Having no separate water pump, this unit benefits from lower
maintenance costs when compared to a standard pumped unit
and reduced down time when compared to Dry filter booths
due to not having to stop production to change filters.
If the unit is fitted with a paint sludge removal system,
the down time is then further drastically reduced. This
unit is a simple chemical or physical water filtration system
which removes the paint solids from the water. A price for
this unit can be supplied upon request.
With automated water level control and a single direct drive
centrifugal fan unit, the no-pump booth is probably the
simplest and most cost effective booth for the medium to
high user.
All AIRBLAST water wash units are fitted with a stainless
steel water tank as standard in order to withstand modern,
more aggressive water treatment chemicals needed to treat
water based paints.
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After
the booth is installed Airblast will offer a full design
and install package for any external duct. During this process
we will work with any local authorities requiring input
to guarantee a compliant facility. Finally after installation
a comprehensive commissioning procedure will be undertaken
leaving the client assured of the performance of the facility.
Our single skin paint mix enclosure. comes complete
with a wall extract duct with mid and low level extract
points , a fan and duct stack to above apex level. An inlet
unit drawing workshop is would be mounted on the roof and
has a integral fire damper. A single glazed door personnel
access door is sited to suit the installation and double
roof mounted lights are fitted. The finish is galvanised
complimented with a powder-coated door.
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