A fluid level sensor assembly includes a first pipe component defining a flow path for the fluid and configured to be attached to a valve to control flow of the fluid from the first pipe component, and a fluid level sensor arranged in or on the first pipe component to detect a level of fluid in the first pipe component and to generate a command signal for operation of the valve according to the level detected. The assembly also includes an insert fitted to an end of the first pipe component and extending axially from the end to be fitted to an inlet of the valve, in use, wherein the insert is configured to secure the first pipe component against rotation relative to the valve inlet when the insert is fitted to the inlet.

A liquid control valve includes a base, a liquid stopper, an adjusting rod, and a linkage. The base includes a first chamber and a second chamber intercommunicating with each other. The base further includes an inner face having an upper stop portion. The liquid stopper includes a valve body movably received in the first chamber and a seal for abutting against the upper stop portion. The adjusting rod includes a fixing arm and an adjusting arm, which are connected to each other by a conical hole and a cone. An end of the fixing arm is pivotably connected to a first pivotal portion of the base. The linkage includes a driving arm and a connecting arm which are pivotably connected. An end of the driving arm is pivotably connected to a second pivotal portion of the base. An end of the connecting arm is pivotably connected to the fixing arm.

An overfill valve associated with a drop tube segment fluidly connected to a fluid reservoir is described. The overfill valve includes a valve body positioned within the drop tube segment and a non-contact valve actuator positioned exterior to the drop tube segment and operable to actuate the valve body from an open position to a closed position without requiring any physical penetration through the wall of the drop tube segment. The non-contact valve actuator has a first position in which the non-contact valve actuator does not actuate the valve body from the open position to the closed position in a second position, achieved when the liquid reservoir reaches a predetermined level approaching the capacity of the liquid reservoir, the non-contact valve actuator actuating the valve body from the open position to the closed position when the non-contact valve actuator obtains the second position.

Water outlet valve structure and a humidifier having the same. Opening or closing of the water outlet valve structure is controlled by a control structure. The water outlet valve structure includes a flow channel including an inlet and an outlet. The control structure is capable of sealing or opening the outlet of the flow channel. The outlet of the flow channel is capable of being sealed or opened by the control structure of the water outlet valve structure, to control the open and close of the flow channel, thereby simplifying the water outlet valve structure. In a further aspect, since only the outlet is sealed, specific requirements for the structure of the control structure are relatively low, thereby allowing the control structure to be simplified.

Water outlet valve structure and a humidifier having the same. Opening or closing of the water outlet valve structure is controlled by a control structure. The water outlet valve structure includes a flow channel including an inlet and an outlet. The control structure is capable of sealing or opening the outlet of the flow channel. The outlet of the flow channel is capable of being sealed or opened by the control structure of the water outlet valve structure, to control the open and close of the flow channel, thereby simplifying the water outlet valve structure. In a further aspect, since only the outlet is sealed, specific requirements for the structure of the control structure are relatively low, thereby allowing the control structure to be simplified.

A liquid control valve including a body comprising an inlet port, an outlet port, and an interior chamber, the body defining a liquid passageway between the inlet and outlet ports. Also included is a plunger comprising a groove provided on an external wall, the plunger being configured to reciprocate within the interior chamber of the body between a first position where the valve is closed and a second position where the valve is open. Also provided is a sealing arrangement within the groove configured to seal between the plunger and the interior chamber of the body. The sealing arrangement includes a first sealing element on the external wall of the plunger and spaced apart from an inner wall of the internal chamber, and a second sealing element on the inner wall of the internal chamber and spaced apart from the external wall of the plunger.

A liquid control valve including a body comprising an inlet port, an outlet port, and an interior chamber, the body defining a liquid passageway between the inlet and outlet ports. Also included is a plunger comprising a groove provided on an external wall, the plunger being configured to reciprocate within the interior chamber of the body between a first position where the valve is closed and a second position where the valve is open. Also provided is a sealing arrangement within the groove configured to seal between the plunger and the interior chamber of the body. The sealing arrangement includes a first sealing element on the external wall of the plunger and spaced apart from an inner wall of the internal chamber, and a second sealing element on the inner wall of the internal chamber and spaced apart from the external wall of the plunger.

The present invention relates generally to a tank overfill protection system (10) designed to be installed in a tank (12). The tank overfill protection system (10) comprises a tank level sensor (14) operatively coupled to a flow control valve assembly (16). The flow control valve assembly (16) is connected to the level sensor (14) via a pilot line (18) which contains a bleed fluid for controlling closure of the flow control valve assembly (16). The tank level sensor (14) comprises a valve body (20), a pilot valve (22) mounted to the valve body (20), and a pilot valve actuator (24) operatively coupled to the pilot valve (22) for its opening and closure. The pilot valve actuator (24) includes a balance member (26) arranged to cooperate with actuator biasing means in the form of a pilot compression spring (28). The balance member (26) is in the form of a counterbalance and has a specific gravity relative to liquid or fuel within the tank (12) so that at least part submersion of the balance member (26) under the influence of the pilot compression spring (28) provides movement of the balance member (26) and closure of the pilot valve (22). This closure of the pilot valve (22) substantially closes and subsequently pressurises the bleed fluid in the pilot line (18) for closure of the flow control valve assembly (16).

The present invention relates generally to a tank overfill protection system (10) designed to be installed in a tank (12). The tank overfill protection system (10) comprises a tank level sensor (14) operatively coupled to a flow control valve assembly (16). The flow control valve assembly (16) is connected to the level sensor (14) via a pilot line (18) which contains a bleed fluid for controlling closure of the flow control valve assembly (16). The tank level sensor (14) comprises a valve body (20), a pilot valve (22) mounted to the valve body (20), and a pilot valve actuator (24) operatively coupled to the pilot valve (22) for its opening and closure. The pilot valve actuator (24) includes a balance member (26) arranged to cooperate with actuator biasing means in the form of a pilot compression spring (28). The balance member (26) is in the form of a counterbalance and has a specific gravity relative to liquid or fuel within the tank (12) so that at least part submersion of the balance member (26) under the influence of the pilot compression spring (28) provides movement of the balance member (26) and closure of the pilot valve (22). This closure of the pilot valve (22) substantially closes and subsequently pressurises the bleed fluid in the pilot line (18) for closure of the flow control valve assembly (16).

A fuel control valve includes a case and a movable body that is movably housed in the case. The case has a valve seat surface shaped in an inner cone shape whose inner diameter increases toward a tip. A valve element surface is operable by the movable body, and is in contact with the valve seat surface along a seal line in a valve closed state. The valve element surface is separated from the valve seat surface in a valve open state. Plural grooves are disposed between the tip and the seal line to expand radially outside from the valve seat surface. Plural projections are defined between the grooves to intermittently leave the valve seat surface.