5
10.01.2019
explosion-proof extraction arms
ERGO
-
L/Z-
{
2
;
3
;
4
}
/Ex
Fig. No.3
– ERGO-L/Z-
{
2
;
3
;
4
}
/Ex
,
ERGO-L/Z-
{
2
;
3
;
4
}
-R/Ex
– Flow charts
(
hanging and standing version
)
5. Structure and Function
Extraction arms type
ERGO-L/Z-(2,3,4)/Ex
and
ERGO-L/Z-(2,3,4)-R/Ex
consist of
subsequent assemblies
– as specified in the drawings (see pages 9 and 10).
● full-rotation swivel (stainless steel),
● lower joint – (connector, hose, hose clamps),
● upper duct segment (stainless steel),
● middle joint – (connector, hose, hose clamps),
● lower duct segment with a shut-off damper, handle and hood joint (stainless steel),
● suction hood – of non-sparking metal (stainless steel),
● gas spring (stainless steel),
● a set of copper cables – joining all the constructional elements of the whole ERGO/Ex
extraction arm and discharging the electrostatic loads to the grounding (dissipation).
A full-rotation swivel, of stainless steel (spark-proof execution) provides 360
rotation of the
extraction arm around its vertical axle
– thus giving the possibility of easy manoeuvring with
the extraction arm in the operational field.
To the swivel are connected ducts (upper segment and lower segment). These segments
are assembled together by means of flexible joints (
i.e. hose-section of special execution
for application in areas of explosion risk, abrasion-resistant, surface impedance
<1 GΩ
).
The full-rotation swivel, the elements of the ventilation ducts (connected with flexible joints)
are forming a ventilation duct through which is extracted the contaminated air.
Position adjustment of the extraction arm (to the User’s requests within the operational field)
can be achieved within the normal workrange of the type of the specific device (2, 3 or 4m).
