A feedback throttle (54) increases the opening amount between a feedback flow passage (49) and a back pressure chamber (47) as a main valve (43) is displaced in the direction away from a main valve seat (46). The feedback throttle (54) has a boundary portion K that divides a section where the opening amount of the feedback throttle (54) changes such that a ratio of change in the opening amount of the feedback throttle (54) to a displacement of the main valve (43) in the direction coming closer to the main valve seat (46) becomes smaller. The boundary portion K is located in a displacement area of the main valve (43) corresponding to a position where an opening portion of a main valve throttle (53) is shut off with respect to the displacement of the main valve (43) in the direction coming closer to the main valve seat (46).

A backflow prevention assembly is configurable with varying lay-lengths and orientations. The assembly includes coupling assemblies and valve bodies that adjust in length and/or rotation to allow for the varying lay-lengths and orientations of the backflow prevention valves and assemblies with and without certification. A coupling assembly is connected to a backflow prevention valve and includes an outer sleeve and an inner sleeve that is slidingly received within the outer sleeve. The lay-length is adjusted by slidably moving the inner and outer sleeves with respect to one another.

A resetting structure and a normally open one-way valve using the same is disclosed. The valve includes a valve plate arranged in a communication cavity of the normally open one-way valve, the valve plate includes a mounting portion at the center and a connecting portion around the mounting portion; the connecting portion is elastic, the periphery of the connecting portion is fixed to inner wall of the communication cavity, and the mounting portion can depend on elastic deformation of the connecting portion and the drive assembly on the one-way valve is moved in the communication cavity; one end of the mounting portion is connected to the connecting rod of the one-way valve, and the other end is used for opening and closing gas nozzle of the one-way valve; and the connecting portion is annular plate-like, and inner side wall of the connecting portion is fixed to the mounting portion.

Aspects of the present disclosure include a connector that interfaces a beverage dispenser with an external water supply. The connector includes a backflow preventer that only allows water to flow from the external water supply to the beverage dispenser. Some aspects of the connector also include a pressure regulator configured to reduce incoming water pressure to a desired pressure. The connector is configured to be mounted to a suitable surface, such as the rear of the beverage dispenser.

The invention relates to a valve apparatus (10) for vacuum applications, comprising a valve housing (20) which delimits a valve chamber (22), the valve chamber comprising a vacuum supply opening (28), a suction opening (32), and a ventilation opening (36); comprising a valve body (40) which is arranged in the valve chamber and can be displaced along a switching axis (38) between a suction position and a ventilation position, wherein the valve body in the suction position closes the ventilation opening and in the ventilation position closes the vacuum supply opening; comprising a bistable actuator (50) for driving a displacement movement of the valve body, the actuator comprising an armature (52), connected to the valve body, and an electromagnetic coil (54) for driving a displacement movement of the armature; and comprising a swing check valve (74) for opening and closing the vacuum supply opening (28). The invention also relates to a vacuum handling apparatus (100) comprising a valve apparatus (10).

The disclosure relates to a valve comprising a valve housing which has two fluid connection points for guiding a fluid and comprising an actuation device for actuating a main piston of a seat valve, said main piston being received in the valve housing. The valve housing together with the seat valve receives a nonreturn valve. At least one bypass line runs in the valve housing, said bypass line allowing a flow of fluid present at the fluid connection point in the direction of a valve chamber in the open state of the seat valve while bypassing the nonreturn valve, said flow being controllable by the main piston of the seat valve.

A method for assembling a regulator includes moving a piston into a bore of a regulator housing and moving an adjuster plug into the bore and axially adjacent the piston, moving an adjuster plug stop into the bore, wherein the adjuster plug stop comprises a tapered surface configured to contact a tapered head of the adjuster plug, and moving a spring member into the bore and between the adjuster plug and the piston. The method can further include threadingly coupling the adjuster plug stop to the regulator housing, wherein the adjuster plug stop moves into the bore in response to being threadingly coupled to the regulator housing. The method can further include configuring the adjuster plug to translate with respect to the regulator housing in response to a change in temperature of the adjuster plug.

Valve subassemblies include a check valve attached to a first attachment hole in a body, and an electromagnetic valve attached to a second attachment hole in the body. A second flow passage includes a common port, a linear first portion extending from the common port, a linear second portion extending from the first portion while being bent, a linear third portion connecting the first attachment hole to the second portion, and a linear fourth portion connecting the second attachment hole to the second portion. The third portion intersects the second portion at an angle equal to or smaller than 90 with respect to a first connection point of the second portion to the first portion. The fourth portion extends parallel to the second portion from an end opposite to the first connection point with respect to a second connection point of the second portion to the third portion.

A ceramic balancing check valve has a valve housing, a controller, a balancing valve unit, and a check valve unit. The valve housing has a main body having two side drainage holes, a control rod. The controller has an upper ceramic plate, a lower ceramic plate, and a base, the lower ceramic plate secured on the base, the upper ceramic plate capable of rotating relative to the lower ceramic plate. The control rod is capable of rotating and driving the upper ceramic plate. The upper ceramic plate has a side outlet aligned with the side drainage hole and a bottom outlet. The lower ceramic plate has two first hot intake holes and two first cold intake holes and further has a first hot and cold outlet. The base has a second hot intake hole, a second cold intake hole, and a second hot and cold outlet.

A fluid control system is provided for controlling flow of a process fluid through a pipeline. In one example, the pipeline can include a valve that defines an upstream and a downstream portion of the pipeline. The system can include one or more instruments configured to control operation of the valve. In one example, the system can include a compressor and an expander configured to selectively receive supply gas from the upstream portion of the pipeline via a supply line. In one example, supply gas flows to the compressor and the expander via the supply line when a differential pressure between the upstream and downstream portions of the pipeline is below a predetermined threshold and does not flow to the compressor and expander when the differential pressure between the upstream and downstream portions of the pipeline is above a predetermined threshold.