A drippage prevention system including: a first automatic control valve (ACV), an input of the first ACV fluidically connected to a source of fluid to be dispensed, the first ACV having a position ranging from fully closed to fully open; a second ACV, an input of the second ACV being fluidically connected to the output of the first ACV, and an output of the second ACV being fluidically connected to a nozzle, the second ACV having positions ranging from fully closed to fully open; a proxy sensor configured to generate a proxy signal representing an indirect measure of a position of the first ACV; and a controller electrically connected to the first and second ACVs and the proxy sensor, the controller being configured to cause the second ACV to close based on the proxy signal and thereby stop flow of the liquid to the nozzle.

A fluid control valve is provided, comprising a valve body configured with an inlet port extending into an inlet chamber, and an outlet port extending from an outlet chamber. The inlet and outlet chambers are partitioned by a sealing bridge. A control chamber accommodates a flexible sealing diaphragm deformable between a sealing position in which it sealingly bears over the sealing bridge and seals a fluid flow path extending between the inlet and outlet chambers, and an open position in which fluid flow along the flow path is enabled. An inlet path along the fluid flow path is longer than an outlet path therealong. An inlet radii of the sealing diaphragm is longer than an outlet radii of the sealing diaphragm.

A diaphragm for a diaphragm valve comprises a base body made from an elastomer, the base body having a side facing towards the media and a side facing away from the media. A force transmission component is disposed at the base body on the side facing away from the media for the attachment of a spindle drive for a diaphragm valve. Furthermore, the base body has a reinforcement area, the reinforcement area being disposed on the outside of the base body on the side of the base body facing away from the media.

A valve includes a valve housing defining a fluid flowpath therethrough, a valve element located in the valve housing and movable in the fluid flowpath to regulate a fluid flow therethrough, and a valve actuator operably connected to the valve element to urge movement of the valve element in the fluid flowpath. The valve actuator includes an actuator housing, a volume of paraffin located in the housing, and an actuator rod located in the actuator housing and operably connected to the valve element, such that phase change of the paraffin urges movement of the actuator rod between a first position and a second position, thereby moving the valve element between a retracted position and an extended position.

A valve having a streamlined fluid flow space is disclosed. The valve includes a main body and an opening-closing member, a fluid flow space through which fluid flows is formed inside the main body, the opening-closing member opens or closes flow of the fluid. Here, the fluid flow space has a streamlined shape from an inlet in a direction from the inlet to the opening-closing member or from an outlet in a direction from the outlet to the opening-closing member.

A plastic valve is disclosed. The valve includes a body where a fluid flow space is formed, a fluid flowing through the fluid flow space, and an opening-closing member configured to open or close a hole formed on the body. Here, the opening-closing member has a step shape, a part of the opening-closing member blocks the hole when the valve is closed, and a part of the opening-closing member with the step shape rises when the valve is opened.

An expansion valve includes a valve body that is designed as a converging-diverging nozzle that tapers from an inlet end and an outlet end thereof towards a throat. The valve body includes an inlet opening, an outlet opening, and a refrigerant flow path that are co-axial, the refrigerant flow path extending through the valve body from the inlet opening to the outlet opening. A portion of the valve body is flexible and configured to be adjusted by application of an external force to throttle the valve body at the throat and thereby control a flow of the refrigerant through the refrigerant flow path. Further, the expansion valve includes a force applying assembly that is coupled to the flexible portion of the valve body to apply the external force thereon. The force applying assembly is disposed external to the refrigerant flow path and removably coupled to the valve body.

A method for operating a diaphragm valve including the step of reading out data, which characterize at least one property of a diaphragm of the diaphragm valve, from at least one data memory integrated into the diaphragm valve, by a reading device. The method further includes the steps of: (a) transmitting the read-out data to a processing device which is arranged remote from the reading device and the diaphragm valve and (b) synchronizing the transmitted data with data present in the processing device.

Automatic fluid control assemblies and methods for fire protection include an arrangement of electrically operated control points, a valve body and a controller to operate the fluid control assembly. The automatic fluid control assembly has an inlet, an outlet and a valve body to control flow between the inlet and the outlet. An electric latch includes a first electrically operated control point and a second electrically operated control point in fluid communication with a control line to control the flow of fluid control include controlling a plurality of electrically operated control points to perform any one of: a leak test, a trip test, a flow test, a water delivery test, and a validation test of a non-trip condition and a trip condition.

An actuator includes a casing having a first annular groove formed in an inner peripheral portion thereof; a piston having a second annular groove formed in an outer peripheral portion thereof, provided in the casing to form a pressure chamber together with the casing, and driven by a drive fluid from an outside of the actuator; and an annular seal member having a first fitting portion to be fitted into the first annular groove and a second fitting portion to be fitted into the second annular groove to seal the pressure chamber.