Burkert Type 0641 - Manual (Page 10)

10
Application Conditions for the units
5.1.10 Use in petrol pumps
DANGER!
Risk of explosion if the device is opened!
▶ The valves may only be dismantled by the manufacturer. The
always represent a closed system!
Risk of explosion!
▶ When using the devices in petrol pumps for the control of petrol
in category 2, a valve body made of metal (brass, aluminium or
stainless steel) must be employed!
The devices may also be used for the control of petrol in Category 2
when no air and no oxygen are present in the closed system. This also
applies during start-up and shut-down of the system.
screwed as a block plugged-on
The solenoid coils are mounted on the armature either with 4 stud
screws M4x59 (flange version) or central fixing G 1/8 (plugged-on
version).
They may be disassembled only by the manufacturer.
The valves always represent a closed system.
5.1.11 Model with a terminal box
DANGER!
Risk of explosion!
▶ Only permanently laid cables and wiring may be inserted.
▶ The operator must provide suitable stress relief.
▶ Wires with an outside diameter of 6 to 13 mm may be used.
Observe the maximum thermal loading of the cables or wires to
be inserted.
▶ The inserted break-off seal must be matched to the diameter of
the cable or wire.
▶ The rated cross-section of the cable or wire strands must be at
least 0.75 mm² and may not exceed 2.5 mm².
▶ The screws for fixing the cover of the terminal box must be tight-
ened with a torque of 100 Ncm (±5%).
The solenoid coils may also be executed with a terminal box, with or
without fuse/contactor (to separate Design Inspection Certificate)
as desired. The attachment of a terminal box changes the explosion
protection type of these solenoid coils.
Designation with attached terminal box:
ATEX: II 2G Ex e mb IIC T4 or T5
IECEx: Ex e mb IIC T4, T5
For protection against inadvertent opening of the cover, the latter
bears the marking:
Open only when the voltage is switched off!
english
PTB 02 ATEX 2094 X