mechanical seals in the nature of shaft seals; 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 being machine parts for pumps, compressors; all the aforesaid goods being parts of machines; mechanical apparatus and devices for storage, pressurization, 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, fluid refill units, fluid circulation units, separators for impurities, 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