Publicité
Common for all types of flameless devices is that the
explosion is released through a specially designed grid
or mesh. The grid or mesh will allow pressure from an
explosion to be released but prevent the explosion's
flames from exiting outside the filter vessel.
The benefit of using a flameless vent device is that
it reduces the size of the risk area. This increases the
possibility of positioning the FlexPAK 800/1000 DX
closer to manned areas or equipment.
However, it must be noted that the use of a flame-
less device does not eliminate the risk area. The high
pressure and hot gases are still released into the sur-
roundings, and this must be taken into consideration
when positioning the FlexPAK 800/1000 DX. Please
consult your local fire authority when determining
suitable positioning of the FlexPAK 800/1000 DX
with flameless device.
Please refer to the installation and service or user
manual for the flameless device supplied with the
FlexPAK 800/1000 DX to find other limitations and in-
formation regarding safe use and service.
All manuals and user guides at all-guides.com
FlexPAK 800/1000 DX
The use of a flameless device will also reduce the
venting efficiency of the FlexPAK 800/1000 DX. This
means that the FlexPAK 800/1000 DX will not be able
to be used with explosive dust types with a higher Kst
(ST type). The limit of the Kst value (ST–type) is de-
termined by the parameters of the specific flameless
device.
3.3.4 Isolation device
An isolation device, see Figure 9, item 2, is to be in-
stalled to prevent a filter explosion from propagating
back into the plant through the connected duct. The
duct, see Figure 9, item 3, between the unit and the
isolation device is to be pressure-resistant to an over-
pressure of at least 0.5 bar (7.2 PSI) and have a minim-
um length as specified in the manual of the isolation
device.
3.4 Dimensions
For the dimensions of FlexPAK 800/1000 DX, see
ure 2A, Figure 2B, and Figure 2C.
Figure 2C
shows the dimensions of the inlet
and one side of FlexPAK 800/1000 DX.
EN
Fig-
21
Publicité
