Download Pressurized enclosure system

F870S
2 Pressurized enclosure system F870S
Page 8
2.3.3 Lowered cabinet stressing due to smaller pressure and pressure gradients
During the purging phase a high flow rate should be achieved to shorten the purge time.
Based on their construction, conventional Ex p- systems show only a smooth rising of the
flow rate while increasing the cabinet pressure.
In this aspect, the FS870S with its reduced flow restriction and back pressure is superior to
any conventional Ex p system.
Within midrange flow rates, the load to the Ex p- cabinet walls is up to four times lower in
comparison to conventional systems!
2.4
Components of pressurized enclosure system F870S
The pressurized enclosure system F870S contains at least the control unit FS870S and a
solenoid valve. Each can be mounted in- or outside the enclosure. Furthermore several remote controls (operation panels) are available to improve ease of operation. It is also possible to connect intrinsically safe sensors to the control unit FS870S.
The pressurized enclosure system F870S has two basic operation modes:
•
Pressurization using leakage compensation
•
Pressurization using continuous flow of protective gas.
Gönnheimer Elektronic GmbH
Tel.: +49 (6321) 49919-0
Fax: +49 (6321) 49919-41