A compressor device for compressing a gas in at least one compression chamber in at least one compression cylinder is disclosed. In each of at least two drive cylinders, at least one drive piston is disposed, said at least one drive piston dividing each of the at least two drive cylinders into two drive chambers. The at least one first and second drive chamber, by way of a hydraulic fluid, are able to be periodically impinged with a fluid pressure in order for the respective drive piston to be moved. Each of the remaining drive chambers in the at least two drive cylinders, by way of a connection piece, are connected in a non-positive locking manner by a fluid. The movement of the drive pistons by way of at least one mechanical connection means is able to be transmitted to at least one compression piston.

The reciprocating compressor comprises a compressor frame, a crankshaft and a connecting rod, connecting the crankshaft to a crosshead. A piston rod connects a piston to the crosshead. The piston reciprocates in a gas compression cylinder. At least one pressure-drop module is positioned between the gas compression cylinder and a crosspiece guide. The piston rod extends from the gas compression cylinder through a pressure-drop chamber of the pressure-drop module. Also disclosed herein is a method of operating a reciprocating compressor.

The present application provides a static seal assembly for a rod configured for reciprocal motion. The static seal assembly is generally sized to fit within a conventional cup of a stuffing box. The static seal assembly has a body with a base and a balloon that fit within the cup. The balloon is made of an expandable material and is selectively in fluid communication with a pressurized fluid source. When pressurized, or inflated, the balloon expands and forms a seal interface with the outer surface of the rod.

A compressor having a stationary part and a part oscillating along a main axis (X) as well as a leakage path (L) extending between the stationary part and the oscillating part in the axial direction, wherein multiple chambers, which are arranged axially in succession and extend annularly around the main axis (X), are defined between the stationary part and the oscillating part, wherein a seal, which closes or reduces the leakage path (L) is arranged in at least one chamber. The compressor has at least one bypass which fluidically interconnects two chambers.

A seal arrangement for use in a reciprocating piston compressor includes first and second seal rings engaged along respective side surfaces, and first and second cover rings disposed around the first and second seal rings such that the outside diameters of the first and second seal rings engage the inside diameters of the first and second cover rings, respectively. A support ring is engaged with the first seal ring and the first cover ring. A backup ring is engaged with the second seal ring and the second cover ring. In some embodiments, the first seal ring has a width that is smaller than a width of the second seal ring. In other embodiments the second seal ring has a circumferential groove formed on an inside surface thereof, the groove disposed directly adjacent the first seal ring. In further embodiments, the seal rings are formed of PEEK with a nano-material additive.

A reciprocating compressor including a compressor frame including a drive shaft received therein, a rotary to linear motion converter coupling the drive shaft and a first end of a piston rod, a piston coupled to a second end of the piston rod, a compression cylinder in which the piston is received, an inlet valve coupled to the compression cylinder and a discharge valve coupled to the compression cylinder, a pressure casing encasing the compressor frame and the rotary to linear motion converter, a motor coupled to the drive shaft, wherein the motor is located external to the pressure casing, and a mechanical seal coupled between the drive shaft and the pressure casing.

A packing ring is disclosed for sealingly engaging a movable rod member within a stuffing box having an internal cavity. In an embodiment, the packing ring includes a carrier and a sealing ring mounted to the carrier. The sealing ring is configured to sealingly engage with an outer surface of the rod when the rod is disposed within the internal cavity. The carrier includes a radially outer surface that is configured to sealingly engage with an internal surface of the stuffing box. In addition, the carrier includes a radially inner surface that is proximate to an outer surface of the rod when the rod extends through the stuffing box. Further, the carrier includes a plurality of lubrication grooves each groove extending from the radially outer surface to the radially inner surface and configured to convey a lubricant flow between the radially outer surface and the radially inner surface.

A seal assembly for a piston rod including an external seal and an internal seal. The external seal is adapted to be placed on a piston rod facing an external environment, the internal seal is adapted to be placed on the rod facing the cylinder associated to the piston. The external and internal seals define in cooperation with each other a chamber for the containment of barrier fluid. Such chamber has an inlet for the intake of barrier fluid and an outlet for the exit of barrier fluid. The assembly also comprises a recirculation circuit for the barrier fluid, which is placed in fluid communication with the inlet and the outlet to recirculate the barrier fluid from the outlet back to the inlet and a pressurizer device configured to be installed coaxially with the piston rod providing the chamber with a positive pressure with respect to the process environment.

A linear compressor is provided. The linear compressor may include a shell including a suction inlet, a cylinder provided in the shell to define a compression space for a refrigerant, a piston reciprocated in an axial direction within the cylinder, a discharge valve provided at one side of the cylinder to selectively discharge the refrigerant compressed in the compression space, and at least one nozzle, through which at least a portion of the refrigerant discharged through the discharge valve may flow, the at least one nozzle being disposed in the cylinder. The at least one nozzle may include an inlet, through which the refrigerant may be introduced, and an outlet having a diameter less than a diameter of the inlet.

Exemplary embodiments provide a packing leak detection system for leaks or discharge of a volatile material which discharge into the environment is subject to regulation. The system contains a compressor apparatus including a compressor cylinder, a compressor piston, a compressor piston rod positioned in a packing case, wherein a volatile material being compressed by the compressor apparatus leaks from the packing case. Also provided is a leak detector sized and configured to detect and monitor leaks of the volatile material from the packing case, as well as an apparatus for capturing and collecting volatile material which may leak from said leak detector. Methods of assessing leaks of a volatile material subject to environmental regulation are also provided.