A check valve assembly for a supply pipe. The check valve assembly includes a hinge pin, a first flapper, and a second flapper. The first flapper is pivotally coupled to the second flapper with the hinge pin. The check valve assembly also includes a stopper located between the first flapper and the second flapper. The stopper is configured to limit movement of the first flapper and the second flapper. The check valve assembly further includes a plate assembly located downstream of the stopper. The plate assembly is configured to break vortices formed in a fluid flow across the first flapper and the second flapper.

The invention relates to a fluid transport pipe. A first unit channel in which a channel cross-sectional area continuously decreases toward a downstream side and a second unit channel in which a channel cross-sectional area continuously increases toward the downstream side are alternately combined. A ratio A (=L/{[Smax].sup.1/2-[Smin].sup.1/2}) is set within a range in which a drag reduction rate R.sub.D becomes a positive value. The fluid transport pipe includes: a first opening formed in a channel wall of the first unit channel; a second opening formed in a channel wall of the second unit channel; and a bypass channel that allows by-passing of a flow from the first unit channel to the second unit channel through the openings.

Disclosed is a flow control valve 100. The flow control valve 100 comprises a cylindrical body 20, a piston 40, at least one fluid seal 60, a handle 60 and a nut 90. The flow control valve 100 is connected between an inlet and an outlet of a pipe to control flow of liquid/gases passing there through even at high temperature and pressure. The flow control valve 100 provides good force to the liquid/gas passing there through and provides an equal distribution of the flow at the outlet without resulting in pressure drop.

The present disclosure relates to a process connection for connecting a flow measuring device, to a pipeline, the process connection including a base body having an opening for conducting a medium and a flow rectifier, wherein the flow rectifier is inserted into a first recess of the base body and fixed in place by plastic deformation of an edge region of the base body surrounding the first recess, for example, by press fitting.

A check valve assembly for a supply pipe. The check valve assembly includes a hinge pin, a first flapper, and a second flapper. The first flapper is pivotally coupled to the second flapper with the hinge pin. The check valve assembly also includes a stopper located between the first flapper and the second flapper. The stopper is configured to limit movement of the first flapper and the second flapper. The check valve assembly further includes a plate assembly located downstream of the stopper. The plate assembly is configured to break vortices formed in a fluid flow across the first flapper and the second flapper.

Provided is a refrigeration machine having: a refrigeration cycle having a compressor, a condenser, an expander, an evaporator, piping (12) which sequentially connects the compressor, the condenser, the expander, and the evaporator, and discharge piping; and an acoustic device (13) provided to the piping (12). The acoustic device (13) has a space formation section (14) having a space (S) formed therein and also having an open first end (14a) which is connected to the piping (12) so as to be in communication therewith; an extendible and contractible bellows pipe (21) connected to an open second end of the space formation section (14); and a sealing section (20) provided to the end of the bellows pipe (21), which is located on the opposite side thereof from the space formation section (14).

The present disclosure relates to a process connection for connecting a flow measuring device, to a pipeline, the process connection including a base body having an opening for conducting a medium and a flow rectifier, wherein the flow rectifier is inserted into a first recess of the base body and fixed in place by plastic deformation of an edge region of the base body surrounding the first recess, for example, by press fitting.

Additively-manufactured flow restrictors are provided, as are methods for producing additively-manufactured flow restrictors. In various embodiments, the additively-manufactured flow restrictor includes a flowbody through which a flow path extends, a restricted orifice located in the flowbody and providing a predetermined resistance to fluid flowing along the flow path in a first flow direction, and a first internal perforated screen positioned in the flow path upstream of the restricted orifice taken in the first flow direction. The flowbody and the first internal perforated screen integrally formed as a single additively-manufactured piece utilizing, for example, Direct Metal Laser Sintering (DMLS) or another additive manufacturing process. In certain embodiments, the first internal perforated screen may include an endwall and a peripheral sidewall, which is integrally formed with the endwall and spaced from an inner circumferential surface of the flowbody by an annular clearance.

Additively-manufactured flow restrictors are provided, as are methods for producing additively-manufactured flow restrictors. In various embodiments, the additively-manufactured flow restrictor includes a flowbody through which a flow path extends, a restricted orifice located in the flowbody and providing a predetermined resistance to fluid flowing along the flow path in a first flow direction, and a first internal perforated screen positioned in the flow path upstream of the restricted orifice taken in the first flow direction. The flowbody and the first internal perforated screen integrally formed as a single additively-manufactured piece utilizing, for example, Direct Metal Laser Sintering (DMLS) or another additive manufacturing process. In certain embodiments, the first internal perforated screen may include an endwall and a peripheral sidewall, which is integrally formed with the endwall and spaced from an inner circumferential surface of the flowbody by an annular clearance.

An apparatus and method provide for a hybrid pulsation dampener. The hybrid pulsation dampener includes an inlet, a flow-through reactive dampener, a gas charged pulsation dampener, and an outlet. The inlet receives a fluid. The flow-through reactive dampener dampens the received fluid. The gas charged pulsation dampener further dampens the dampened fluid as the received fluid flows through the flow-through reactive dampener. The outlet discharges the further dampened fluid.