SAFETY IN THE PLANT
ADVANCED PRESSURE RELIEF SOLUTIONS
ammonia-water-steam generation at low temperatures, has always been protected by safety valves. Due to the limited leak- tightness of re-sealable relief devices (safety valves) especially over longer periods of time, some operators have now begun installing rupture discs downstream from the safety valves.
U Manufacturers such as Rembe are now
offering rupture discs specifically for this type of application. Dr Stefan Rüsenberg, the man responsible for this development, said: “The KUB GT is specially tailored to the needs of geothermal power plants. We use high-quality, corrosion-resistant materials to ensure the rupture discs are permanently leak-tight and can be in service for a long period of time. The key point in this application is zero emissions. This is also important for the acceptance of these power plants amongst the population.”
ntil now, the secondary circuit in geothermal power plants, which is used in the Kalina process for the
“The GT in the product name stands for geothermal,” Rüsenberg added. These rupture discs are used to secure a vast range of steam and condensate lines as well as condensers, evaporators and heat exchangers. By installing the rupture disc in a special holder on the process side of the safety valve, the valve will be protected from the process medium during normal operation. The KUB GT has a completely smooth surface on the process side. In combination with the corresponding holder, a metal-on-metal gasket is created, which guarantees a much higher leak- tightness than the use of a safety valve as a stand-alone solution would provide. Even if the Kalina process was primarily used by geothermal power plants, it is fundamentally also suitable for all processes that use corrosive, hazardous or polluting media and require a high degree of leak-tightness. n
For more information visit
www.rembe.de SMART FIRE EXTINGUISHER FILL CHECKER
he time and cost involved in checking the fill levels in banks of fire extinguishers in hazardous areas can be considerable, since it can require lengthy shutdowns and a large number of man hours. However, this is not the case with the ULLC IS from Link Instruments, which, being intrinsically safe, allows the extinguisher levels to be checked without interrupting normal operation. ATEX certified to II 2G Ex ib IIC T4 Gb, the upgraded device uses ultrasound to locate the boundary between the liquified and gaseous gas. It is suitable for fire extinguisher cylinders using liquid CO2
T , Halon, FM200, NOVEC, etc.
In operation, the transducer is placed against the cylinder body slightly below the expected fill level and gradually
50
www.engineerlive.com
The ULLC IS from Link Instruments is ATEX certified
raised until the reading jumps sharply. This is due to the enhanced propagation of surface acoustic waves when the transducer reaches the liquid/gas interface. “We believe that the ULLC IS is the only intrinsically safe, ATEX approved model for checking fire extinguisher fill levels,” said Link Instruments’ Dominique Christie.
The instrument is supplied with an
ultrasonic transducer and an extension pole for accessing bulk system installations on ships, etc. It will be particularly useful in industries such as oil & gas production and also in the marine sector.
The company is also proud to state that the ULLC IS is designed and manufactured in the UK.
For more information visit
www.linkinst.com
Rupture disc KUB installed downstream from the safety valve
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