Abstract: An electromagnetic control ( 12, 14, 14A) causes the opening of a valve (1A) blocking the connector (1) of the system (3) to be used; pipes (30, 34, 42) with corresponding connections to a transfer passage (20, 16, 14B, 9, 7A) are controlled by corresponding valves (36, 38, 44); one of the pipes supplies the refrigerant or other pollutant fluid, a second pipe connects the injector to a vacuum source, and a third pipe connects the injector to a suction recovery means, permitting the discharge, recovery or extraction of pollutant gas from the dead space inside the injector and if necessary from the confined volume of said system (3).

Abstract: The vacuum pump is subdivided into: a first part (13), consisting of an "actuating module" comprising the electric motor (15) and a support structure (16) containing both the half-couple (37) of the transmission coupling (35, 37), and the channels (53, etc.) and connections for the intake and delivery of the gases, connected to the various external pipes (47, etc.) and emerging at a coupling surface (C--C); and a second functional part (11), constituting a "pump module" and comprising the rotor or rotors (24, 25) with the associated rotating axle (33) complete with half-couple (35), the stators (21) and the delivery valves contained in a housing (27) which contains the special liquid for leaktightness and lubrication, which can be coupled to and uncoupled from the "actuating module" at said coupling surface (C--C), where corresponding connections emerge.