10
CAUTION!
Be aware of hot particles remaining inside the valve, even if the explosion is over.
While opening the inspection panel, parts can fall off from the inside, damaging the
operator or goods.
−
Every time there is a potentially explosive atmosphere danger, special safety steps must be
taken, as the following:
Tools or operations which can produce sparks, which can cause gas
ignition, or flammable vapors, are not allowed to be used in any procedure that takes
place in any area classified as explosion risk.
Avoid dust removal by blowing while cleaning.
The use of free flames near the explosion risk area is strictly forbidden.
3
INSTALLATION
CAUTION! The non‐return valve installation, connection, start‐up and maintenance
must be performed in absence of potentially explosive atmosphere through the
process interruption.
CAUTION! The installation, connection, start‐up and maintenance of the non‐return
valves must be performed by qualified personnel. Use the right equipment, clothing and individual
protection devices according to the situation, and do not work alone.
CAUTION! Any modifications done by the user on the non‐return valve are prohibited!!
3.1
Maintenance
Replacement parts must be purchased from original manufacturer to guarantee explosion
protection.
CAUTION! Internal parts of the non‐return valve shall be inspected 2 monthly for signs of
wear. Especially the EPDM valve seal shall be intact and in place. If EPDM valve seal is worn or not
fitted correctly, the seal must be replaced to guarantee explosion safe operation.
Clean and check the performance of the non‐return valve regularly. It is strictly forbidden to open
the inspection panel while the air flow is running through the duct.
During maintenance keep the system disconnected and all the electrical equipment turned off.
