The MEC II-series pumps have an automatic protection system. So, for example, if a vane breaks, the rotor and rotor housing can be protected by the rotor—including the flange mountings—being pushed downwards Pumps with a "ballast system", identified by B at the end of the item number (e.g. MEC9000MB) have a longer operating time in vacuum operation The operating time at -0.95 bar lasts from 8 minutes (standard) up to a maximum of 15 minutes. Continuous operation is permissible at -0.6 bar. MEC II-series pumps are supplied with long-life (heat-resistant) vanes as standard MEC II-series pumps feature a temperature meter to enable the temperature to be read during operation A maintenance hatch can be used to determine the wear condition of the vanes, indicating when the vanes need to be replaced Each pump is subjected to a final check in the factory, in which the vacuum, compression and lubrication are tested, among other factors A test report relating to the serial number is drawn up for each pump