VG Instruments (SEA) Sdn Bhd
12A, Jalan Dagang SD2/1G,
Bandar Sri Damansara,
Kepong, 52200
Kuala Lumpur, Malaysia.
+603-6276 8363
+603-6276 9363

Liquid gas levels 每 measured with electronic differential pressure

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Liquid gas levels 每 measured with electronic differential pressure Real application examples Vega Innovation


Liquid gas levels – measured with electronic differential pressure

 

 

Process data

Medium
Liquid gas (LPG)
Container
Spherical storage tank
Measuring height
21 m
Tank pressure
300 mbar
Medium temperature
-10 ... 0° C
Ambient temperature
-20 ... +40° C

Application

The application Liquid gas, which is typically a mixture of propane and butane, is a by-product of petroleum refining. With its high energy content, it is an ideal fuel for cars (LPG) and for heating. It is usually stored in spherical tanks in refineries. Level measurement in these storage tanks is a real challenge. Liquid gas has physical properties that are not conducive to measurement, so only a few measuring methods are suitable for use. For safety reasons, two redundant measurement setups and a separate overfill protection system are always required. All measuring systems must be SIL2 qualified. Differential pressure transmitters with capillary systems are often used to measure the liquid levels. Due to the huge dimensions of the spherical tanks, extremely long capillary tubes are required. These tubes are exposed to outdoor temperatures, which influence the measured values significantly.


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