HANLA
IMS
CO., LTD.
1610-5 SONGJEONG-DONG GANGSEO-GU BUSAN KOREA
-Tel: 82-51-601-3000
-Fax: 82-51-831-1850
-Email: [email protected]
MT-HGS-100NEW SYSTEM
Rev.9
2010-07-13
Page 11/58
1.4.4 Gas detectors
The HGS-100 System uses two locations of Gas detectors : inside the Analyzing Unit, in suction process sampled Gas, and
in local areas to be controlled. Any gas detectors of Infrared, catalytic, electro-chemical or any other type, 4-20mA output,
can be connected to the Analyzing Unit.
For
Gas detectors located inside the Analyzing Unit, in suction process sampled Gas:
detector dedicated to
Hydrocarbon gases is Infrared type, for best reliability and maintenance-free. For
Local Gas detectors:
Same detectors can
be used, but installed with connection box.
z
To monitor the BALLAST TANK, infra-red type detector is used based on the principle of infra-red absorption.
The quantity of absorption of infra-red is changed by the type of the gas. Thus, the concentration can be determined by the
quantity of the gas.
z
To monitor the PUMP ROOM, solid-state type Detector was adopted.
These detectors have the built-in microprocessor and output the 4~20mA current to interface the other equipments. Here,
these current signals are converted to digital data by the A/D converter of Analyzing Board. Control Board displays those
data from the analyzing board.
1.4.5. Solenoid valves
The 8 solenoid valves are installed on the manifold. The system uses the 9 sets of manifold for total 48 channels of the
sampling points. The supply voltage and power consumption of valve is DC 24V, 4.4W. The maximum pressure is 145 psi
and 2 way type. These solenoid valves are used to connect the air line to the sampling pump sequentially by the control
signal of Control Unit.
1.4.6. flowmeter, regulation valve, filter
Sampled air by the Sampling pump will flow through the air filter to prevent the dust, water, humidity. The filter will drain
the water and dust periodically. The flowmeter shows the flowrate of suction air flows to the detector by the sampling pump.
The regulation valve controls this flowrate.
1.4.7 Analyzing Unit adjacent equipments
z
Bulkhead penetrations for suction process channels : the number of bulkhead penetration set is defined by the
number of bulkhead to pass through. For each channel a flame-arrestor EEx d class is placed at the limit between
safe and hazardous area, on relevant bulkhead penetration;
z
Shut-off valves for each channel;
z
Flow-regulating valve for each channel allows to equilibrate the flow whatever is the length of the line, for best
efficiency of the system;
z
Bulkhead penetrations for gas exhaust and filter drain;
z
Shut-off valve and manometer for instrument air supply for channel purge.
