Galvanic Applied Sciences 943-TGXeNA, Руководство по эксплуатации

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Revision 5 31 August 2021
control cabinet door is latched closed. Once normal purge flow has been established, the
conduit connections are sealed, and the control cabinet door is latched shut, the purge
indicator on the front of the purge control box will change colour from red (insufficient
cabinet pressure) to green (normal purge pressure).
2.4.7 Connections of Steam
The steam pressure and temperature requirements for the sample probe steam jacketed
nozzle is given in Table 2 of this manual.
The steam inlet for the sample probe steam jacketed sample probe nozzle should be at the
top of the nozzle, and the outlet should be at the bottom. The outlet of the nozzle should be
connected to the inlet of the steam jacketed ball valve, and the outlet of the steam jacketed
ball valve should be connected into the plant condensate collection system.
All steam lines, the steam jacketed sample probe nozzle, the steam jacketed ball valve, and
the flange between the nozzle and the analyzer system should all be well insulated to prevent
heat loss and improve temperature control.
2.4.8 Connection of the Loss of Purge Signal
The control cabinet purge control box shown in Figure 12 has an integrated pressure switch
that can indicate loss of sufficient control cabinet protective purge air flow. This pressure
switch is equipped with a discrete output to indicate loss of purge. The wires for this pressure
switch are located on the right side of the purge control box. If these wires are connected to
the plant control system, they can be used to generate an alarm in the control room if purge
air is lost. The pressure switch discrete output will generate an alarm signal when the local
purge indicator is red; when this indicator becomes green, no alarm signal is generated.