A choke for a flow line having an inner diameter has a body with an upstream end, a downstream end, and a sidewall that extends between the upstream end and the downstream end. The sidewall has a diameter that is sized to fit within the inner diameter of the flow line. A fluid impact face is provided at the upstream end of the body. The fluid impact face has a recessed central portion. One or more passages provide fluid communication between the downstream end and the sidewall of the body.

A percussive pressure damper includes an entrance port, an exit port axially displaced from the entrance port, an axial flow channel extending from the entrance port to the exit port, a plurality of expansion chambers each extending radially from and in fluid communication with the axial flow channel, and an outer wall enclosing the axial flow channel and the expansion chambers. Each expansion chamber is enclosed by an inner surface of the outer wall and by interior walls, such that any cross section of the tube normal to the axial flow channel cuts through at least one interior wall between the axial flow channel and the outer wall. The expansion chambers may form a generally cylindrical honeycomb structure, each enclosing a hexagonal conical volume that expands in a radial direction, the expansion chambers axially stacked in radially symmetric and axially offset groups.

Disclosed a regulator for clutch actuator. The regulator for clutch actuator includes a housing having a cylindrical damping space inside, a first fluid path interconnecting the damping space and a master cylinder, and a second fluid path interconnecting the damping space and a an operating cylinder. The regulator further includes a flexible valve member contained in the damping space for reducing vibrations. The flexible valve member comprises a first inflow guiding portion configured to receive and guide fluid from the first fluid path. The first inflow guiding portion has a plurality of through holes such that elastic deformation of the first inflow guiding portion reduces vibration when fluid flow into the cylindrical damping space from the master cylinder.

An additively manufactured duct assembly includes a noise reduction features, insulating features, and leak detection features. The duct assembly includes a first duct that defines a first duct first resonator and a second duct that is disposed about and is spaced apart from the first duct. The spacing apart of the second duct from the first duct provides an insulating air gap therebetween. The second duct may also be provided with a port to connect the duct assembly to a leakage detection system.

A method of custom manufacturing a fluid pressure reduction device for use in a process control valve. The method includes creating the fluid pressure reduction device using an additive manufacturing technique, which generally includes forming a body and forming a plurality of flow paths in the body. The body has an inner wall and an outer wall spaced radially outward of the inner wall. The flow paths are formed in the body between the inner wall and the outer wall of the body. Each of the flow paths includes an inlet section formed in one of the inner and outer walls, a curved intermediate section, and an outlet section formed in the other of the inner and outer walls.

A device (1) for lowering flow noises has opposed first and second connection pieces (2, 3), and outer and inner sleeves (4, 5) between the connection pieces. A radial collar (6) is between the sleeves (4, 5) and forms separated volume chambers. Openings (11) in the inner sleeve (5) connect the volume chambers to a line space (13) enclosed by the inner sleeve (5). A sealing ring (15) at the free end (14) of the collar (6) defines a ring cap with a lateral surface (21) that reaches over the collar (6) and seals against the sleeve (4, 5) adjacent the free end (14) of the collar (6) and that has a surface (23, 26) that seals against either an end face (25) of the collar (6) or a side surface (28) of the collar (6) extending parallel to the radial collar (6).

An aspect of the present disclosure includes a compressor system operable for compressing a working fluid. An integrated muffler and pressure pulse dampener (IMPPD) is operable for reducing pressure pulsations and attenuating noise in the working fluid. The IMPPD system includes an elongate axial passageway bounded by an outer wall having a plurality of apertures extending therethrough. A first portion of the working fluid enters through the central elongate section and a second portion of the working fluid passes through the pertures. The first and second portions of working fluid merge together downstream of the IMPPD inlet and cause a dampening of pressure pulsations propagating within the working fluid.

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.

A method of custom manufacturing a fluid pressure reduction device for use in a process control valve. The method includes creating the fluid pressure reduction device using an additive manufacturing technique, which generally includes forming a body and forming a plurality of flow paths in the body. The body has an inner wall and an outer wall spaced radially outward of the inner wall. The flow paths are formed in the body between the inner wall and the outer wall of the body. Each of the flow paths includes an inlet section formed in one of the inner and outer walls, a curved intermediate section, and an outlet section formed in the other of the inner and outer walls.

Disclosed is a device for reducing flow noise. In order to achieve a low flow noise, the device includes inlet apertures for receiving a fluid flow, chambers into which one or more inlet apertures open up, a cross-sectional area of a single chamber being larger than a combined flow cross-sectional area of the inlet apertures opening up thereto, and chamber-specific outlet apertures for forwarding the fluid flow from the chamber, a flow cross-sectional area of each outlet aperture being smaller than the cross-sectional area of the chamber, and the combined flow cross-sectional area of all outlet apertures of the single chamber being larger than the combined flow cross-sectional area of the inlet apertures opening up into said chamber.