Flameless Explosion Venting Device
–
FLEX
27
35
1
7. SERVICE AND M AINTEN ANCE
7.1 SERVICE
The general inspection and service of FLEX can be performed only by the
manufacturer or the person certified by the manufacturer for these activities
(authorized person).
The following service interval is recommended for the flawless functionality of FLEX:
The Scope of Service Activities:
1) Check for any mechanical damage to FLEX.
2) Gasket and sealing inspection (flange gasket inspection, inspection hole gasket
check with the rectangular FLEX device (of the F and R series)).
3) Check of FLEX cleanliness. The flame filter meshes must be maintained in a
perfectly clean condition; no dust or other dirt may stick on the surface or inside the
FLEX device. Therefore, the meshes must be cleaned using an industrial vacuum
cleaner and/or mechanical means (a dry cloth, broom or others) within each service
inspection. If the FLEX is fitted with a protective bag, the bag must also be cleaned
from dust and dirt. Extensive bag cleaning should be ensured by the operator
(washing of the bag).
4) The opening signalling device - the inspection of the supply cable, signalling
operability and the settings.
5) For the rectangular FLEX devices (of the F and R series), the membrane integrity can
be checked through the inspection hole. After the inspection and possible cleaning of
dirt, the hole must be thoroughly sealed using the inspection hole gasket. In the event
of damage, the new one can be ordered from the manufacturer. The original cover
(lid) of the inspection hole and the original fasteners, a self-locking nut (ISO 7040,
property class 8) and the plain washer (ISO 7090), both galvanized, should be used
for covering the hole. In the event of loss, you can replace the fasteners with the new
1. service (functionality check)
3 weeks after commissioning
2. service (functionality check)
6 weeks after commissioning
3. service
6 months after
commissioning
4. service
1 year after commissioning
Each additional service (under
flawless operation)
Once a year