A pulsation control device includes a fluid supply module, a switching unit, a first path, a second path, and a fluid receiving device. The fluid supply module outputs fluid according to a pulsation signal and a flow rate. The first path is connected between the fluid supply module and the switching unit. The second path is connected between the switching unit and the fluid receiving device. The fluid receiving device can receive the fluid outputted from the fluid supply module. The switching unit controls a state of open or closed between the first path and the second path. When the fluid supply module supplies gas to the first path for pressurizing the gas volume of the first path, the pressurized gas volume is instantly released to the fluid receiving device through the second path, so that the volume in the fluid receiving device changes.

A device that includes an electrochemical cell that includes a rigid housing, electrodes that comprises an anode, a cathode, and an adjustable pressure element configured to assert a controlled pressure on at least one of the electrodes. The controlled pressure is set to a first value during a first point in time and is set to a second value during a second point in time. The electrodes and the adjustable pressure element are located within the rigid housing.

A method for preventing flow reversal due to an upstream pressure drop in a natural gas supply line. The method, using a unique system configuration, includes setting a threshold low pressure for the upstream gas flow, continually sensing the upstream pressure, activating a trigger valve when the upstream pressure falls below the threshold low pressure, and closing a control valve in response to the trigger valve to prevent reversal of flow in the gas supply line.

A coolant system is arranged to be driven by a prime mover of an aircraft. The coolant system comprises a fluid circuit with a fluid therein, the fluid for cooling an electricity generator located in the fluid circuit. The fluid circuit comprises: a cooling path passing via at least one cooled component of the generator; a first fluid flow source configured to deliver a first fluid flow to the cooling path; a second fluid flow source configured to generate a second fluid flow; and a valve arrangement configured to selectively direct at least a proportion of the second fluid flow away from the cooling path in dependence on a measured operational parameter of the generator. An aircraft propulsion system and an aircraft can also include the coolant system.

Pressure regulators with adjustable boost bodies are described herein. An example pressure regulator includes a valve body; a seat in the fluid passageway; an actuator casing coupled to the valve body; and a plug assembly including: a stem; a plug coupled to the stem; a stem guide disposed in the channel of the actuator casing; a boost body on the second side of the stem guide; and a tube extending through the boost body, the tube and the boost body forming a unitary structure to prevent movement of the tube relative to the boost body, the tube having a first end and a second end, the second end disposed in a downstream location relative to the seat, wherein the boost body is rotatable with respect to the stem guide to position the tube in at least one other orientation relative to the actuator casing.

A processing liquid supply system includes a tank that stores a processing liquid supplied from a processing liquid supply, a circulation passage that is connected to the tank, a plurality of supply passages that is connected to the circulation passage and supplies the processing liquid to each of a plurality of liquid processing units that perform a liquid processing on a substrate, a first pump filter set that is a combination of a first pump and a plurality of first filters provided downstream of the first pump, and a second pump filter set that is a combination of a second pump and a plurality of second filters provided downstream of the second pump. The first pump filter set and the second pump filter set are arranged in series in the circulation passage such that the first pump filter set is located upstream of the second pump filter set.

An outlet assembly for hybrid pressure and flow regulation includes a first orifice of a first size, a second orifice of a second size that is larger than the first size, and a mechanism that automatically moves the first orifice between a first position, a second position, and a third position. When the first orifice is in the first position, the flow of gas passes through the first orifice, which regulates a flow rate of the flow of gas through the second orifice. When the first orifice is in the second position, the flow of gas primarily bypasses the first orifice and flows through the second orifice with a first specific flow rate. When the first orifice is in the third position, the flow of gas primarily bypasses the first orifice and flows through the second orifice with a second specific flow rate.

A system for regulating an axial biasing force applied to a stacked set of packing elements mounted within stationary equipment, comprising a packing loading assembly for sealing a process fluid within the stationary equipment and for applying the axial biasing force to the packing elements via a pressurized fluid from a pressure regulator. The packing loading assembly includes a gland element for mounting to the stationary equipment by a plurality of gland bolts, and an external actuation subsystem for coupling to at least one of the plurality of gland bolts for applying an axial actuation force directly to the gland element in response to the pressurized fluid. The gland element in response to the axial actuation force applies the axial biasing force to the packing elements.

A back pressure regulator (BPR) includes a pressure housing that at least partially defines a flow chamber that the liquid flows through and the BPR has an adjustable restriction that varies with the flow rate to maintain an upstream liquid pressure. The pressure housing is contoured to distribute the liquid flow to provide radial flow into the adjustable restriction from circumferentially about the adjustable restriction. The pressure housing includes ramped and curved side passages that guide the flow and ridges that divide the flow and prevent internal collisions between the flow. A flow deflector extends into the chamber outlet to prevent the radial flows through the annular restriction from colliding. The flow deflector redirects the flows to smoothly recombine in the chamber outlet.

A pressure regulating valve includes a body having a pressure regulating chamber into which a working liquid flows and an attachment hole fluidly coupling with the pressure regulating chamber, a valve seat assembly fitted in the attachment hole, wherein the valve seat assembly includes a surplus liquid discharge path fluidly coupled with the pressure regulating chamber, a piston configured to open and close an opening of the surplus liquid discharge path in the pressure regulating chamber, a valve seat seal forming a seal between the valve seat assembly and the body in the attachment hole in a liquid-tight manner and a return flow path fluidly coupling an inside of the attachment hole to the surplus liquid discharge path. Wherein the valve seat seal is located between the return flow path and the pressure regulating chamber.