Disclosed are processes, devices and systems for preventing overpressurization of subsea production equipment and flowlines in which fluid passes through a high integrity pressure protection system (HIPPS). In embodiments, a container having a piston seal therein can be attached to the piping. In embodiments, a device having a piston seal therein and connected to a fluid receptacle can be attached to the piping. In the event of a pressure surge, fluid can be diverted to the container or the device, thereby lessening the pressure surge. In embodiments, the container or device includes a resetting force to return the piston seal to its original sealed position. The use of the systems disclosed improve the life of the HIPPS valve, protects subsea equipment and flowlines, and enables a length and/or a wall thickness of a fortified pipeline zone downstream of the HIPPS to be reduced.

A water hammer prevention device for a boiler includes: a housing; a joint coupled to the housing for water flow; a water hammer prevention part to which water pressure introduced through the joint is applied and wherein the water hammer prevention means is a flexible displacement member, including a coupling part formed between the first and second members of the housing to be fastened; an inclined part formed inclined downwardly from the coupling part and the water hammer displacement part upwardly protruding from the inclined part, and an elastic member mounted between the lower surface of the water hammer displacement part and the second member to provide a restoring force.

A shower system includes a shower waterway and a fluid control valve. The shower waterway is configured to be coupled to a shower device. The fluid control valve is coupled to the shower waterway and comprises a valve body and a piston. The valve body includes a chamber and a reservoir. The piston is slidably coupled to the valve body and fluidly separates the chamber from the reservoir. The chamber includes a compressible gas. The piston is configured to slidably translate within the valve body to compress the compressible gas in response to a water pressure fluctuation in the shower waterway.

A contoured branch fitting for reducing stress in a header pipe caused by acoustic induced vibration that includes a maximum width, a maximum length, a thickness that is greater along the maximum length and a constant radius between the branch connection and the header connection.

A contoured branch fitting for reducing stress in a header pipe caused by acoustic induced vibration that includes a maximum width, a maximum length, a thickness that is greater along the maximum length and a constant radius between the branch connection and the header connection.

The present invention relate to a pulsation damper for use with a flow sensor adapted to measure a mass flow of a fluid, particularly of a liquid, wherein the pulsation damper is configured to dampen a flow pulsation of the fluid, in case of which the fluid has alternating flow minima and flow maxima, wherein the pulsation damper comprises at least one conduit which extends in an axial direction and comprises a wall which surrounds an interior space of the conduit which is designed for the fluid to pass through, wherein the wall comprises a region extending in the circumferential direction of the wall and configured to be moved by a pressure maximum of the fluid in a direction of the conduit perpendicular to the axial direction from a first position outward to a second position, such that a cross-sectional area of the interior extending perpendicular to the axial direction is enlarged, wherein the cross-sectional area is non-circular when the region of the wall is in the first position.

An attenuator for high pressure fluid systems is provided. The attenuator includes a shielding stud including first and second ends, a cylindrical space extending therebetween, and a housing fixedly coupled to the first end. The attenuator includes a body disposed within the cylindrical space and defining a pressure chamber therein. The body includes an engaging wall extending axially beyond an opening to the pressure chamber and defines a sealing chamber therein. A seal head positioned within the sealing chamber is coupled to the body using a tensioner assembly coupled to the engaging wall. The seal head is engaged with the body first end to define a seal therebetween and an end cap is coupled to the second end of the shielding stud and the seal head. The end cap can apply a compressive force to the seal head to compress the seal head against the body and apply a tensile load to the shielding stud. A plunger is movable within the bore to pressurize the fluid in a space defined by the piston, the seal head, and the attenuator body.

A fluid pulse dampener with automatic pressure-compensation is provided. A system of chambers and channels in the dampener creates an internal feedback mechanism that increases or decreases a compensating pressure on the membrane in response to increases or decreases in the pressure of a fluid moving past the other side of the membrane. Variations of the pulse dampener allow for the input and/or output of gas flow is be restricted or increased as may be desired.

A refrigerant hammer arrestor includes a housing having an internal compartment communicating with a refrigerant line, a piston received in the housing and dividing the internal compartment into a first chamber and a second chamber and a damping mechanism to dampen displacement of the piston within the housing. Various refrigerant loops are also described incorporating a refrigerant hammer arrestor.

A shower system includes a shower waterway and a fluid control valve. The shower waterway is configured to be coupled to a shower device. The fluid control valve is coupled to the shower waterway and comprises a valve body and a piston. The valve body includes a chamber and a reservoir. The piston is slidably coupled to the valve body and fluidly separates the chamber from the reservoir. The chamber includes a compressible gas. The piston is configured to slidably translate within the valve body to compress the compressible gas in response to a water pressure change in the shower waterway.