Sugar Land TX…Servomex announces that Callidus Technologies, LLC, the Tulsa-basedcombustion and environmental protection specialist, has purchased several systems utilizing twoServomex 1900 oxygen analyzers and a sampling system meeting the strict U.S. Coast Guardrequirements for monitoring ships being loaded with volatile liquids at marine terminals. The Servomexsystem provides accuracy, reliability and speed of response required.When ships are loaded with liquids such as gasoline, fuel oils or naphtha, vapor is displaced from thehold. This vapor can either be recovered or, as in this case, destroyed using an enclosed flare. Thecomposition of the displaced vapor is highly variable and under certain conditions can fall within theflammability limits of the gas. Natural gas is used to enrich the vapor to ensure that the combustiblesare maintained above their U.E.L. (upper explosive limit). An oxygen analyzer is used to monitor andcontrol mixture to ensure that a hazardous situation does not arise. Because of the safety-criticalnature of this application, two oxygen analyzers are used in a redundant voting arrangement. If theoxygen level is detected as being above the control point, action must be taken within 30 seconds.Along with other types of combustion and process equipment, Callidus Technologies builds marineterminal vapor destruction systems for U.S. and foreign-based customers and, as always, the budgetis tight, so a low-cost sampling system and oxygen analyzers are a concern. Having used Servomexequipment before, and always with success, Callidus Technologies immediately turned to Servomexfor a replacement sampling system and oxygen analyzers.The perception is that Servomex instruments are much more expensive but, in fact, the 1900 analyzermodels we used were very cost-competitive. I have always believed that Servomex analyzers are thebest, so we had no hesitation in calling Servomex as soon as we realized we had a problem. It wasalso vital that Servomex could deliver a complete package, as our in-house capabilities do not extendto building sampling systems. At every stage in the project we have been taken care of very well;Servomex customer service standards are exceptionally high.Servomex 1900 magnetodynamic (suspension type) paramagnetic analyzers with a custom-designedand manufactured sampling system approved for use in hazardous area classification Class I Division2 Groups C and D. Piping to the two analyzers was designed to be of equal length from the sampletake-off and the sampling system was configured so that the analyzers could be calibratedconcurrently, with only a single control point for the gas inlet for calibration and sample. Anotherdesign feature was the coalescing/membrane filter that is installed in such a way that it is continuouslydrained so that condensate does not collect.Early tests with the Servomex system showed that the response time was in the order of five seconds,and the two analyzers could easily read within 1 percent of the measured range.Neil Frihart concludes: “Currently we are commissioning the vapor destruction system and I haveevery confidence that the Servomex equipment will perform faultlessly- both during commissioningand when it is in operation.”More information about the Servomex 1900 gas analyzers and sample systems, as well as otherServomex gas analyzers, all of which are available and fully supported worldwide, can be obtainedfrom Servomex Group by calling 281 295 5800, faxing 281 295 5899, or visiting the website at www.servomex.com.
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