Flameless Explosion Venting Device
–
FLEX
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35
1
fasteners. For this purpose, there are galvanized fasteners, i.e. the bolts ISO 4762
with a property class 8.8, locking nuts with a property class 8 ISO 7040 and plain
round washers ISO 7090, all sized M8 (for FLEX R4 M10). If they have been
damaged or lost, they can be replaced with the new ones. The connections must all
be tightened with a tightening torque 15 Nm (21 Nm for FLEX R4).
9) A new membrane (a spare part from the supplier) can be sealed from the underside
to this prepared FLEX, using the silicone sealant suitable for this application. The
identical flange gasket supplied by the company RSBP spol. s r.o. can also be used;
the gasket is commonly used between the membrane and the flange on the
technology. Please note that the membrane must face with the signalling device
towards the FLEX entry and the signalling device must be wired properly.
10) Further installation is identical with the new FLEX, i.e. the same as the procedure
detailed in chapter 4.
FLEX, F-Series:
1) Stop the production process in the protected technology immediately.
2) Let FLEX and its surrounding cool down to the acceptable level, so that it is possible
to work in the vicinity of FLEX as well as with the actual device.
3) In the event of explosion, FLEX must be dismounted from the equipment.
4) After the dismounting, check whether no visible plastic deformation to the FLEX body
has occurred and whether its integrity is maintained. If not, the further use of FLEX is
prohibited!
5) Then remove the flame filter from FLEX; the filter is attached to the FLEX body using
the welded bolts. Then remove the membrane.
6) The ALSIFLEX 1430 (thick. 2) gasket is applied on the FLEX body under the flame
filter (see fig. 15). If this gasket is not damaged or polluted after the explosion, or if its
integrity is not infringed, there is no need to change it. Otherwise, replace it with a
new one.
7) This dismounted FLEX must be thoroughly cleaned and the residue materials after
the explosion must all be removed. During this cleaning, pay attention to the surfaces,
on which there is the gasket form the previous clause; it must not be damaged.
8) This cleaned FLEX can be further repaired and used. A new flame filter (a spare part
delivered by the supplier) should be inserted into the upper part of the FLEX body, or
the gasket should be replaced and the new flame filter should be tightened to the
FLEX body, using the original fasteners. For this purpose, there are galvanized
fasteners, i.e. locking nuts with a property class 8 ISO 7040 and plain round washers
