Liquid Petroleum Gas (LPG) and 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.
Level Detection with the VEGASWING 63
Due to its high pressure resistance and impermeability, the 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 900psig (64 bar). 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.
Level and Interface Measurement with the VEGAFLEX 67
Especially for measuring ranges up to 20 ft (6 m), 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 liquefied 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 analyzing the two reflected signals.
Trouble-Free Retrofitting with the VEGAPULS 68
Retrofitting with standpipes for level measurement is work- and cost-intensive, especially in large vessels. The VEGAPULS 68 high-sensitivity radar instrument 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.
VEGAPULS 63 – When Things Get Mighty Cold
The 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 -328°F (-200°C). 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.
