control valve type SG09, DN15; PN100; groove and tongue according to DIN EN 1092-1; NC; housing: AISI 316; fixed disc STN2; sliding disc STN2/STN3; additional metal bellow; kvs-value 0,7 (40%); special characteristic equal percentage; diaphragm actuator 125cm²; digital positioner; 2-wire; ATEX II 2G Ex ia IIC T4 Gb, IP 65; control signal 4-20mA; incl. feedback module; hysteresis setting 0,2%; with visual position indicator and earthing connection; additional leakage test