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Absorption System
The absorption type backup system is constituted by a
pneumatic valve actioned by a solenoid valve, both installed
on the piping spool between the odorant tank and the main
gas line, downstream the ΔP valve.
When the absorption system is activated, the pneumatic
valve actioned by the solenoid valve opens ensuring gas
flow through the tank, due to the differential pressure created
on the gas main line by a dedicated valve (butterfly or ball
valve depending on the operating pressures of the
reducing station).
The gas, being in contact with the surface of the odorant
liquid inside the tank, gets soaked with the same liquid,
going back to the main line properly odorized.
The regulation of the gas flow is performed through the
needle valve installed on the tank.
The setting of the absorption system is fixed; it is therefore
necessary to modify it in case of a change in the
operating conditions.
The absorption system tank is also used as service tank
for the main injection system, ensuring, during normal
functioning, the feeding of liquid to the injection panel.
MAXIMUM SYSTEM CAPACITY
l/h
0,5
1
2
4
6
8
10
12
14
Table 1. Maximum Odorizable Gas Flow Rate Smc/h
DOSAGE
40 mg/Smc (THT)
12500
25500
50000
100000
150000
200000
250000
300000
350000
Dosaodor DO200
The following accessories are installed on the tank:
• Level indicator
• Inlet needle valve
• Outlet valve
• Odorant loading valve
• Tank pressure gauge
• Liquid feeding assembly to the injection panel
• Collection basin
Double Injection System
As emergency system, instead of the absorption system, a
second Dosaodor DO200 can be foreseen.
The system Injection + Injection works exactly like the
system Injection + Absorption type; in this case the backup
is ensured by the second Dosaodor DO200.
In this configuration, instead of one injection panel, two
identical ones (Master / Slave) will be installed. In case of
malfunctioning of the main panel, the second one will be
activated and will work in the same way.
The selection between Master or Slave system is done
through a dedicated switch.
Both systems will have dedicated power feeding and
auxiliary batteries pack (optional).
DOSAGE
10 mg/Smc (mercaptans)
50000
100000
200000
400000
600000
800000
1000000
1200000
1400000
3
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