Safety valves regulate dangerous overpressure and protect people and machines. In safety loops of permanently operating plants, these valves very often remain in one stop position because their safety function is rarely used. In order to ensure their operability, the valve movement has to be tested regularly by partial stroke tests. With the SIL 3 solenoid driver KFD2-RCI-EX1, you can execute these tests at any time independently from valve status, and also save an additional analog module..
A partial stroke test is used for testing safety valve functions. According to IEC 61508 and IEC 61511, this procedure is essential in safety applications in order to ensure availability and detect failures. Partial stroke tests: