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 Model Number |
Vapour pressure and oxygen sampling |
■ General
Vapour emission control system is intended for analyzing the waste vapour gas
for oxygen gas content.
The system also includes the pressure transmitter which can monitor the pressure
on the waste vapour line.
The system consists of two cabinets; a detector cabinet in which the pressure
transmitter, oxygen sensor, flow alarm sensor, sample selector valve and purge
valve are included, and the monitoring & alarm panel on which the alarm unit,
oxygen indicator are provided.
The detector manifolds and the monitoring & alarm panel is mounted in the
cargo control room.
■ Principle of operation
The sample tubes in the detector cabinet run from the sample point inlets to oxygen
sampling selector valve and mode selector valve. Exiting from this single tube
is leading the chosen sample gas through filter between oxygen sampling selector
valve and mode selector valve, and then finally passes the oxygen sensor, exhausted
through the exhausting line on the cabinet panel.
The display shows the O2 concentration from 0.0 to 25.0V% O2 on the oxygen monitor
and the "High oxygen content alarm" is activated at 8V% O2.
The " Flow failure" is also operated when the flow is stopped.
The display shows the pressure transmitted from waste vapour line on the vapour
pressure indicator from 0 to 200 mbar.
The "Low pressure alarm" is also activated at 10 mbar and the "High
pressure alarm" ; at 120mbar.
It is possible to increase or decrease the pressure alarm value freely and the
external alarm output relay for all alarm can be provided as optional items.
■ Features
- Intrinsically safe detecting is applicable to all of inflammable fluids
- All stainless steel material pressure sensor
- Individual adjustable alarm for oxygen and pressure
- Most advanced electronic technology for high reliability and durability.
■ Technical Specification
System
- Main power supply : AC 110/220V, 50~60Hz
- System power : DC 24V
- Air supply : 4~7bar
- Function :
- Inert gas pressure display(0~200mbar)
- Inert gas high pressure alarm(120mbar)
- Inert gas low pressure alarm(10mbar)
- Oxygen content display(0~25% V% O2)
- Oxygen content high alarm(8 V% O2)
- Flow failurealarm(If the flow is stopped)
- External alarm(option)
- Enclosure : EEx ia II C T4
Pressure transmitter
- Range : 0~200mbar
- Power supply : 17~28vdc
- Output : 4.......20mA
- Safety : EEx ia II C T4
- Accuracy : ±0.2% of F.S
Digital indicator
- Size : 48H x 96W x 112D
- Input : 4......20mA
- Output contact : H and L alarm
Oxygen sensor
- Range : 0~25% O2
- Power supply : DC 24V
- Output : 4........20mA
- Safety : EEx ia II C T4
- Accuracy : ±2% of F.S
Alarm Annunciator
- 10 channel type
- Power supply : DC 24V
- Function : Accept horn, Accept flash, Test function
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