Burkert Type 2834 - Manual (Page 10)

10
Application conditions
5.4 Application in gas pumps
DANGER!
Risk of explosion!
Following installation, solenoid coil and valve body form a closed
system. If used in the explosion-risk area, there is a danger of
explosion if the system is opened during operation!
▶ The system must not be disassembled during operation.
▶ The valve body may be repaired by the manufacturer only.
Solenoid valves together with the coil Type 7..-... may be used as
category 2 devices only for the control of gas if there is no air and
no oxygen in the closed system.
▶ Ensure that the closed system contains no air or oxygen or can-
not be penetrated by air or oxygen.
▶ When switching off or starting up the system, ensure that nei-
ther air nor oxygen has penetrated the system.
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 stain-
less steel) for the control of gas in gas pumps with category 2
devices.
5.5 Model with a terminal box
DANGER!
Risk of explosion!
▶ Only specified cables and lines may be used.
▶ The operator must ensure an adequate strain relief.
▶ Lines with an outer diameter from 6 mm to 13 mm may be used.
Observe the maximum thermal load of the installed cables and
lines.
▶ The inserted break-out seal must be adjusted to the diameter of
the cable/line.
▶ The rated cross-section of the cables/line cores must be at
least 0.75 mm² and must not exceed 2.5 mm².
▶ Screws for attaching the cover of the terminal box must be
tightened to a torque of 100 Ncm (±5%).
english
PTB 00 ATEX 2202 X