Burkert Type 2834 - Manual (Page 8)

8
Application conditions
5 APPLICATION CONDITIONS
5.1 Special conditions
• To protect each solenoid coil against short-circuit, a fuse (max.
3 x I
b
in accordance with IEC 127), corresponding to the rated
current, or a motor protection switch with short-circuit and thermal
quick release (set to rated current) must be connected upstream.
This fuse may be housed in the associated supply unit or must
be connected separately upstream. The rated voltage of the fuse
must be equal to or greater than the indicated nominal voltage
of the solenoid. The breaking capacity of the fuse insert must
be equal to or greater than the maximum short-circuit current
accepted at the installation location (usually 1500 A).
The nominal value of the fuse is indicated on the solenoid.
Fuse ... A
• If the solenoid coil Type 07..-... is used as a category 2 device for
the control of gas in gas pumps, the valve body must be made of
metal. The coil is mounted on the core feed pipe and may only be
dismantled by the manufacturer. The valves always form a closed
system.
• The application temperature range indicated in the "Electrical
Data" (Chapter 5.2. Operating conditions) must be observed for
each type.
• The attachment of a terminal box changes the designation of the
ignition protection type of the solenoid coil 07..-...
• The permanently installed connection line of the solenoid must be
connected in a housing which meets the requirements of a rec-
ognized ignition protection type according to EN 60079-0, If the
connection is made in an area where there is a risk of explosion.
• The solenoid coil Type 07..-... is suitable for individual assembly
only.
5.2 Operating conditions
When operating the solenoid coils Type 7..-..., the following require-
ments have to be observed.
5.2.1 Materials
For the selection of materials for the system observe the application-
specific, safety requirements.
Valve body:
DANGER!
Risk of explosion!
If the system is used as a category 2 device, only valve bodies
made of metal can ensure the required safety for the control of
gas in gas pumps!
▶ Use only valve bodies made of metal (brass, aluminum or stainless
steel) for the control of gas in gas pumps with category 2 devices.
english
PTB 00 ATEX 2202 X