Chemistry vacuum systemMD 4C EX + AK + EK three stage,230 V / 50 Hz, with ATEX approval:pumping chamber (pumped gases):II 2G IIC T3 Xenvironment (without inert purge gas):II 3G IIB T4 Xenvironment (with inert purge gas):II 2G IIB T4 Xmotor: II 2G Ex d IIB T4,incl. switch for manual reset,safety protectiveswitch, cable without plug