Shaft seals; single-acting and double-acting mechanical seals with gas or liquid lubrication for sealing liquid or gaseous media; box-type mechanical seals; mechanical seals with sealing fluid supply; mechanical seals with rinse functions; mechanical seats with leak recovery mechanisms; mechanical seals with leak checking mechanisms; all the aforesaid goods being machine parts; mechanical apparatus and equipment for the storage, pressurization, circulation and/or tempering of fluids used in mechanical seals; mechanical apparatus and equipment, namely counter-pressure units, fluid backfeed units, fluid circulating units, separators for impurities; apparatus and equipment for leak collection; gas supply units (machine parts) for mechanical seals with gas lubrication; mechanical seals of all kinds, sealing rings, lip seals, gap seals, labyrinth seals, gland sealings, seals for rotary tubular kilns

Packing and stopping materials