Abstract: The present invention relates to a plastics material with self-lubricating action which is particularly suitable for the production of sealing elements for reciprocating compressors, said material comprising a wear-resistant polymer matrix, preferably made from polyketone, within which are dispersed microcapsules containing a lubricating fluid. The microcapsules incorporated into the polymer matrix break up as a result of friction with the contact surface of the sliding partner, resulting in the escape of the lubricating fluid and a consequent reduction in friction.

Abstract: A system for remote diagnosis of the state of wear of the suction and delivery valves of reciprocating compressors comprises at least one piezoelectric seismic sensor, applied to each cylinder of the compressor. The sensor transforms the vibrations generated by the noise of the valves into an electric signal. By appropriate amplification and filtering, the envelope of the resulting narrow band signal is obtained. The signal obtained is then digitized, and transmitted to a remote diagnostics center for monitoring.

Abstract: A device (10) for continuous regulation of the gas flow rate processed by a reciprocating compressor, wherein the reciprocating compressor has at least one first compression piston (35), which is associated with a first cylinder (51), and can create a pressure which is variable over a period of time, and a second piston (13), which acts inside a second cylinder (52), which is in free communication with the said first compression cylinder (51), associated with the said first piston (35), and which acts on an additional dead space (11). The device includes a third fluid mechanics cylinder (12), which moves the said piston (13) of the dead space (11), wherein the third fluid mechanics cylinder (12) is activated by means of a compressed fluid, supplied by means of an independent hydraulic system (14), in order to obtain continuous variation of the dead space (11).

Abstract: A system for remote diagnosis of the state of wear of the suction and delivery valves of reciprocating compressors (20), comprising at least one piezoelectric seismic sensor (12), applied to each cylinder (14) of the compressor (20), which transforms the vibrations generated by the noise of the valves into an electric signal, from which, by means of appropriate amplification and filtering methods, the envelope of the resulting narrow band signal is obtained; the signal obtained is then digitised, and transmitted to a remote diagnostics center (16), in order to be monitored.

Abstract: A device (10) for continuous regulation of the gas flow rate processed by a reciprocating compressor, wherein the reciprocating compressor has at least one first compression piston (35), which is associated with a first cylinder (51), and can create a pressure which is variable over a period of time, and a second piston (13), which acts inside a second cylinder (52), which is in free communication with the said first compression cylinder (51), associated with the said first piston (35), and which acts on an additional dead space (11). The device includes a third fluid mechanics cylinder (12), which moves the said piston (13) of the dead space (11), wherein the third fluid mechanics cylinder (12) is activated by means of a compressed fluid, supplied by means of an independent hydraulic system (14), in order to obtain continuous variation of the dead space (11).