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Liquefied gas
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Liquid petrolum gas (LPG) und liquid natural gas (LNG) applications
In crude oil distillation processes, liquid gases such as propane and butane are generated. These gaseous substances are stored either at extremely low temperatures, or under pressure in spherical or horizontal cylindrical tanks. High demands are made on the operational reliability of the sensors, because the tanks cannot be opened for several years at a time.
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Level detection with VEGASWING 63
Due to its high pressure resistance and impermeability, VEGASWING 63 is especially suitable for all level detection applications in liquid gases. The vibrating level switch is absolutely impervious and can withstand vessel pressures up to 64 bar (900 psig). The sensor can also reliably detect the empty condition, which is important for preventing a dangerous gas flashover during emptying. The sensors of the VEGASWING series have SIL 2 certification.
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Level and interface measurement with VEGAFLEX 67
Especially for measuring ranges up to 6 m (20 ft), the guided microwave instrument offers the best solution for continuous level measurement, with simultaneous detection of the water level in LPG applications. Part of the transmitted signal penetrates the surface of the liquified gas and is reflected by the water surface that may exist close to the bottom of the vessel. An interface measurement can be carried out by analysing the two reflected signals.
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Trouble-free retrofitting with VEGAPULS 68
Retrofitting with standpipes for level measurement is work- and cost-intensive, especially in large vessels. The high-sensitivity radar instrument VEGAPULS 68 can acquire level data of liquid gas without the usual standpipes. A ball valve separates the sensor from the process and enables retrofitting without emptying the vessel.
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VEGAPULS 63 - when things get mighty cold
VEGAPULS 63 is the ideal sensor for all applications in extremely low temperatures. Thanks to the antenna cover of PTFE, the instrument can be used even when product temperatures drop to -200°C (-328°F). An additional temperature-isolating elastomer seal is not required. For products with poor reflective properties, such as liquid nitrogen, application with a standpipe is recommended.
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VEGASWING 63
- multiple electrical versions
- product independent
- annual WHG test by simply pressing a key on the signal conditioning instrument
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VEGAFLEX 67
- coaxial rod version
- measuring range up to 6 m (20 ft)
- suitable for poor reflective properties
- easy adjustment
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VEGAPULS 68
- non-contact measurement
- no stand-pipe necessary
- high dynamic range
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VEGAPULS 63
- process separation made of PTFE
- small sensor dimension
- suitable for low temperatures
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