KROHNE BM 70A EEx EN - Manual (Page 8)

07/2010 - 4000662402 MA BM70x-Ex-AD-R02-en www.krohne.com 8
3.2. Flange systems
3.2.1. Category / Zone allocation
The allowable operating conditions for the flange systems of the BM 70..-Ex devices are given in the
following tables.
NOTE:
The application restrictions marked with indices should be observed without fail.
3.2.1.1.
BM 70..-Ex with flange system V96
Standard-temperature version
High-temperature version (with distance piece)
V96 Allowable operating conditions
Material Version Category Zone
Gas
Group
Flange temperature /
product temperature
[°C]
Tank pressure
[bar]
0 -20 ... 60°C (1)
-0,2 ... 0,1
(1)
(0,8 ... 1,1 bar abs.)
all certified variants 1G
1
IIC
see standard Installation & Operating Instructions
(1) Limitation to atmospheric conditions in accordance with EN 60079-26
Application restrictions - flange system V96:
Flange system V96 with heating
The operator shall ensure that the temperature of the heating medium, when used in Zone 0 or 1, shall
not exceed 80% of the ignition temperature (in °C) of the product(s) inside the tank, and shall not
exceed the maximum allowable flange temperature as a function of the Temperature Class. The
operating pressure of the heating system is limited to max. 6 bar. Ensure that the inlet and outlet of the
heating system are correctly connected (see information plates on the upper side of the flange).
Flange system V96 with purging device
When delivered, the purge connection is closed off by a 1/4“ screw. Connection and operation of the
purge connection fall within the responsibility of the operator. When this screw is removed, the
operator is responsible for ensuring conformance with the ’Ex’ requirements pertaining to the purging
system (e.g. fitting a flame trap).
The operator is also responsible for selection of a suitable purging medium.