Abstract: A piston rod sealing system for a reciprocating machine (1), including a piston rod (8) having a first end (8a) connected to a piston (9), and a second end (8b) connected to a crankshaft (10), the piston rod (8) being received within a housing (7); and a sealing unit (11) provided between the piston rod (8) and the housing (7), and having a first lateral surface (12a) facing the first end (8a) and a second lateral surface (12b) facing the second end (8b). The sealing unit (11) includes a first rod seal (13) positioned in the vicinity of the first lateral surface (12a) and a second rod seal (14) positioned between the first rod seal (13) and the second lateral surface (12b), the sealing unit (11) being fixed within the housing (7). The second rod seal (14) includes a liquid injection pipe (15).

Abstract: A reciprocating compressor comprising a cylinder and a piston dividing the cavity in the cylinder into a first and a second chamber being connected through respective suction valve systems and discharge valve systems to a suction duct and a discharge duct. The suction and discharge valve systems each including a housing defining a valve chamber and a valve body, whereby the compressor is further provided with a vessel defining a volume in fluid connection with a valve chamber of one of the discharge valve systems by a conduit.

Abstract: The present invention is directed to a piston rod sealing system for a reciprocating machine (1), the system comprising: a piston rod (8) having a first end (8a) connected to a piston (9), and a second end (8b) connected to a crankshaft (10), the piston rod (8) being received within a housing (7); a sealing unit (11) provided between the piston rod (8) and the housing (7), and comprising a first lateral surface (12a) facing the first end (8a) and a second lateral surface (12b) facing the second end (8b); wherein the sealing unit (11) comprising a first rod seal (13) positioned in the vicinity of the first lateral surface (12a) and a second rod seal (14) positioned between the first rod seal (13) and the second lateral surface (12b), said sealing unit (11) being fixed within the housing (7); the second rod seal (14) comprises a liquid injection pipe (15).

Abstract: A multi-stage compression installation is formed of a main pipe (2) emerging in a baffle plate (3), where at least two compressors (4, 5) are mounted in series each having its own drive member (9, 10). The installation is equipped with a system for determining the pressure at the output of the main pipe (2), the installation being connected to a control box (8). Typically, the control box (8) is connected to at least two of the drive members (9, 10) of the compressors (4, 5) and ensures monitoring of the compressors such that the latter rotate jointly whether charged or uncharged. Thus, the compressors (4, 5) are jointly charged based on the pressure prevailing in the baffle plate (3), such that the charging of the compressor representing the overpressure stage, the compressor(s) of the lower compression stages are automatically and jointly charged.