page 6 of 25 GBB-EXKOM-08157/2
2.3 Function
Normal production sequence
The QV II Quench Valve (D) is open to the full
pipe diameter with no pressure drop across the
valve.
QV II Quench Valve, REMBE
®
bursting discs
and Q-Rohr
®
(B) ensure secondary protection
in the event of a dust explosion without
interrupting any production sequence.
During explosion
Vessel (A) is vented via the explosion venting
action of the REMBE
®
bursting disc or with
flame suppression with the Q-Rohr
®
(B). Thus
the majority of the pressure wave and flame
front developed during the explosion is
reduced.
The explosion venting Q-Rohr
®
(B) or bursting
disc within the system immediately sends a
signal to the EXKOP
®MINI
Safety Controller (C)
which immediately initiates closure of the QV
Quench Valve (D).
During closure, a build-up of product occurs in
front of the QV II Quench Valve (D). This
causes a displacement of oxygen, so that the
dust-air concentration is moved out of the
explosive range and ignition capability is
reduced.
The explosion is completely isolated by the
closure of the QV II Quench Valve.
EXKOP
Safety Controller
EXKOP
Safety Controller
EXKOP
Safety Controller
B
D
A
C
B
D
A
C
B
D
A
C
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