shaft seals being mechanical seals, bearing housings for machines; single and double mechanical seals with gas or liquid lubrication for sealing liquid or gaseous media; cassette-type mechanical seals; mechanical seals with confining fluid seals; mechanical seals with a flushing function; mechanical seals with leakage recirculation; mechanical seals with leakage control; slide rings; all the aforesaid goods being parts of machines; mechanical apparatus and devices for storage, pressurisation, circulation and/or temperature control of fluids for use in mechanical seals, namely, closed loop fluid circuits; mechanical apparatus and devices, namely, buffer pressure units being an industrial appliance for cooling and lubricating mechanical seals and avoiding deposits, fluid refill units being an industrial automatic refill appliance for barrier fluid pressurization in seal circuits, fluid circulation units being an industrial fluid supply appliance for supplying mechanical seals, separators for impurities being magnetic separators, magnetic filters, and cyclone separators for industrial use, apparatus and devices for collecting leakages, namely, industrial appliances having a collection and detection device for fluid leaks; gas supply devices for mechanical seals with gas lubrication, namely, compressors, super-chargers, flow meters, filters, and pressure regulating valves, all for use in gas supply systems

Installation and maintenance of mechanical seals