The invention relates to a constant-pressure valve (45), in particular for an alarm valve station (100) of a sprinkler system (200), having a fluid inlet (16), a fluid outlet (15), a flow channel between the fluid inlet and the fluid outlet, and a control piston (3, 8) which is arranged in the flow channel and which is movable back and forth between a standby position and a triggering position and which has a first piston surface (S.sub.1) facing toward the flow channel and has a second piston surface (S.sub.2).

It is proposed according to the invention that the constant-pressure valve has a switching chamber which is separate from the flow channel and which has a switching pressure inlet (4) in fluid communication with the switching chamber, wherein the second piston surface (S.sub.2) faces toward the switching chamber (4a), wherein the constant-pressure valve (45) has a securing element (21) which is coupled to the control piston (3, 8) of the constant-pressure valve (45) and which, in the standby position, absorbs the forces acting on the first piston surface (S.sub.1) of the control piston (3, 8).

An automated liquid delivery system comprising: a housing defining an internal chamber, the housing comprising at least one delivery hole; a flow control valve inserted into the internal chamber and connectable to a source of liquid, the flow control valve for controlling a flow of liquid coming from the source of liquid; at least one pipe inserted into the internal chamber and connected to the flow control valve for delivering the liquid coming from the flow control valve through the delivery hole of the housing; a controller inserted into the internal chamber for controlling the flow control valve, the flow control valve and the controller being powerable by a battery insertable into the housing; and a cover securable to the housing for enclosing the flow control valve, the pipe, the controller and the battery therein.

A method for closed-loop controlling, in particular closed-loop pressure controlling, a piezo valve device, including the steps: calculating a control error integral signal representing a time integral of a control error of the closed-loop control of the piezo valve device, adjusting, based on the control error integral signal, at least one control opening voltage value defining within the closed-loop control an opening voltage value of a piezo valve of the piezo valve device, and using the adjusted at least one control opening voltage value, providing at least one drive voltage for driving the piezo valve within the closed-loop control.

Provided are anti-scald devices and faucet assemblies comprising anti-scald devices. An anti-scald device can include a housing having a cylindrical interior space comprising a first cavity, a second cavity, a mixing chamber, a hot water inlet, and a cold water inlet, a plunger provided within the cylindrical interior space and comprising a cylindrical protrusion portion that separates the first cavity from the second cavity, a counter spring in the first cavity, and a shape memory alloy (SMA) spring in the second cavity, wherein the anti-scald device is in an inactive configuration when the temperature of the mixed water is below a threshold temperature, and when the mixed water reaches or exceeds a threshold temperature and comes in contact with the SMA spring, the SMA spring is configured to expand to reduce or restrict hot water flow such that the anti-scald is in a fully active configuration.

Provided are anti-scald devices and faucet assemblies comprising anti-scald devices. An anti-scald device can include a housing having a cylindrical interior space comprising a first cavity, a second cavity, a mixing chamber, a hot water inlet, and a cold water inlet, a plunger provided within the cylindrical interior space and comprising a cylindrical protrusion portion that separates the first cavity from the second cavity, a spring in the first cavity, and a wax element in the second cavity, wherein the anti-scald device is in an inactive configuration when the temperature of the mixed water is below a threshold temperature, and when the mixed water reaches or exceeds a threshold temperature and comes in contact with the wax element, the wax element is configured to expand to reduce or restrict hot water flow such that the anti-scald is in a partially active or a fully active configuration.

A thermal bypass valve includes a housing defining a bore along a longitudinal axis and having two inlet ports and two outlet ports; a cap disposed within the bore; a shuttle disposed within the bore and reversibly translatable towards and away from the cap along the longitudinal axis between a first fill position, a cooling position, and a bypass position; and an actuator configured for translating the shuttle along the longitudinal axis between the cooling position and the bypass position. The actuator is formed from a shape memory alloy and is transitionable between a first state and a second state in response to a temperature of the fluid.

A diaphragm valve includes: a valve body having flow paths of fluids formed therein and having a diaphragm-arrangement portion on one surface; a diaphragm arranged in the diaphragm-arrangement portion and can open and close the flow path and adjust the opening degree of by elastic deformation; and a driving unit having a stem for pressing the diaphragm to elastically deform and an actuator for driving the stem, wherein the stem is axially movably held via a resin sleeve by a bonnet fixed to the valve body side.

A valve may include a housing forming one inlet and at least one outlet, an operating unit mounted in the housing, and performing expansion or contraction in accordance with a temperature of a flowing working fluid to selectively connect the at least outlet with the one inlet for exhausting the flowing working fluid outside of the housing, wherein the operating unit includes a sliding member slidably inserted into the interior of the housing, a flange member forming a penetration hole and fixedly mounted inside of the sliding member, a rod movably inserted into the penetration hole of the flange member, and a deformable member fixed at the penetration hole of the flange member and expanded or contracted in accordance with a temperature of the flowing working fluid.

A bistable electromagnetic actuator includes a housing extending along an exertion axis of the actuator, two excitation coils arranged inside the housing and having at least one winding around the exertion axis for generating a magnetic control flux, a core that can be moved along the exertion axis and immobilized in two end positions depending on the magnetic flux generated by the coils, an actuating member coupled to the core to form a movable assembly, and a manual control device comprising a drive shaft mounted such that it can rotate about a first axis orthogonal to the exertion axis.

The drive shaft has at least one tooth engaging with at least one first raised part translationally connected to the actuating member such that rotation of the drive shaft generates translational movement of the movable assembly.

The rotary valve device includes a valve 30, a housing H having a joining surface 14b.sub.1 located at ends of a fitting hole 14a and a through hole 16, a thermostat 110 partially accommodated in the through hole 16, a cylindrical seal member 80, an urging spring 90, and a passage member 60. The passage member 60 includes a cylindrical holding member 61 that is fitted into the fitting hole 14a and holds the cylindrical seal member 80 and the urging spring 90, and a connector member 62. The connector member 62 includes an annular fitting recess 62a.sub.3 into which a part of the cylindrical holding member 61 is fitted, and a detour passage 62a.sub.4 that is divided from the fitting recess by a wall portion to partially accommodate the thermostat and bypasses the cylindrical seal member to communicate with the through hole.