Siemens SIPROCESS GA700 Compact Operating Instructions page 195

Table 8-24
Sample gas inlet conditions for OXYMAT 7
Gas type
Max. pressure p
Min. pressure p
Temperature
Sample gas flow rate q
Reference gas pressure
Table 8-25
Pneumatic data of the protective gas
Enclosure volume
Protective gas
Duration of pre-purging phase
Minimum volume for pre-purging
Flow rate in the pre-purging phase
Min. pressure of protective gas
Consumption during operation
Max. load on Ex p enclosure
Type test pressure on Ex p enclosure
Devices in explosion-proof design
Compact Operating Instructions, 05/2015, A5E35134047-02
8.3 Technical specifications for operation in hazardous areas
Sample gas inlet conditions for OXYMAT 7
Wall-mounted device only
Ex px
Wall-mounted device Ex nR,
Ex pz, Ex tc
Rack-mounted device only
Ex nA
max
min
v
Pneumatic data of the protective gas
Combustible gases up to gas mixtures which are
occasionally explosive
Non-combustible gases
Combustible gases
3 000 hPa (abs.)
500 hPa (abs.)
0 to 50 °C
0.3 ... 1.0 l/min
> 3.2 bar (abs.)
Approx. 60 l
● Inert gas (e.g. nitrogen from a gas cylinder)
● Air from an ex-free zone; prerequisite:
– Oil and dust free, particle size < 40 μm
– Oil content < 5 mg/m³
– Dew point < 2 °C at 0.4 MPa
● With pressurized enclosure: only inert gas
10 min
60 l/min. (3 600 l/h)
For non-combustible sample gases
For combustible sample gases
For Ex px with continuous purging
For Ex pz with simplified pressurized enclo‐
sure
< 110 hPa (rel.)
165 hPa (rel.)
Technical specifications
600 l
50 Pa (rel.)
50 Pa (rel.)
1 l/min
1 l/min
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