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stand in the test rig also depend on the test standard. There are important main criteria: the valve must be able to resist interior pres- sure – depending on norm, valve size and type. Water is used as a medium. Firing lasts 30 minutes, the ame reaches a temperature of up to 1000 °C, and the housing temperature 600 °C. After the ring period, water is used to cool down the valve to 100 °C, over a period of ten minutes. Depending on norm, cooling can also take place using air. It is essential for the “leakage rate to comply with the speci c norm,” emphasises Manfred Schaaf, Amtec. Packag- ing, housing seal and seat are viewed as critical. If a valve ful ls the leakage criteria set in a norm, the product receives a certi cate: tested re safe!
Enhanced test rigs
Safety is too important for things to stagnate. “Due to changing testing requirements the test rigs have to be modi ed again and again,” states Manfred Schaaf. Investments are always required: just recently, the company put a test rig for cryogenic tempera- ture applications into operation.
Amtec is continuously expanding in the lucrative testing facilities eld. Meanwhile, various testing facilities are available for testing seals, valves and stuf ng boxes. Development of the re safe test rig was, by the way, realised within a project supported by the Federal Ministry of Economics. A project with propelling Germany forwards.
Various testing institutes in Europe already had individual test rigs, but the most important insti- tute for re safe certi cations has so far been a testing laboratory in the USA. “With the test rig we developed type approval tests can now also be conducted here in Germany,” says Manfred Schaaf. “Valve manufacturers, or the customers, often want to attend
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ITAtube Journal No2/July 2018
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