Machines, namely machines for the chemical industry, machines for the food industry, machines for the industry of beverages, machines for the pharmaceutical industry, filling machines, machines for the handling and in particular for the discharging of pulverized and/or liquid substances; valves, in particular flow-control valves, metering valves, shut-off valves, outlet valves, stop slide valves; valves for the transport of bulk materials and liquid goods in the food industry, pharmaceutical industry and chemical industry; valve systems; parts and components of the aforementioned goods