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◊ Air Purge Type (EN-PN)
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◈ Operating Principle
Operating priciple is based upon the measurement of the hydrostatic
pressure at the
bottom of the tank by injection of air or inert gas through a bubbling
probe.
The output pneumatic signal of the constant flow regulator
is fed into P/I converter
and is changed to electric output signal(4~20mA) can be connected to C.R.T
display
cargo system. Digital indicator, analogue type indicators, etc. or a combination
of
these system.
◈ Features
• Liquid
level of measuring depth pressure is indicated for direct reading, and
then the
high precision is achidved.
• The
construction is simple and the handling and maintenance is easy.
• 4~20mA
output signal/2-wires.
• Blowing
valve is select type(change over type)
So blowing is very easy.
• Included
stop valve at air purge head, other pressure is no need for line leakage
test.
◈ Application
• Ballast
tank remote reading
•
Draft remote reading
•
Fuel oil tank remote reading
• All liquids even viscous
ones(molasses bitumen, etc.…)
◈ Standard Specificatian
• System
type : One line type air purge system
• Flow
rating : 10~80NI/hour
• Working
temp : 0~50℃
• Supply
air setting pressure : 4.5㎏/㎠
• 400m
Max. distance of signal line and constant flow regulator
• Signal
line size : OD 8 or OD 10
• Range
: 1 to 40 meter
• Output
: 4~20mA, 2wire system
• Power
supply : 16 to 32VDC
• Accuracy
: ±0.5% of F.R(Option), ±1.0% of F.R(Std)
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◈ Principle Digram
The flow is produced by means of on automatic
constant flow regulator, type which
includes.
• An
air supply filter
• An air flow regulator
ensuring a constant pre-set flow at the end of the sounding
pipe in the tank irrespective of the supply pressure.
• Gauge saver is used for protecting
the indicator and pressure transmitter against
over pressure.
• The air supply valve
is used for isolation from other channel without any influence.
• The blowing valve in used for sending the full air pressure
through the signal line
for cleaning purposes.
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• DIMENSION
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