The present disclosure provides an explosion-proof valve core, an explosion-proof valve, and a box body gas tightness detection clamp, including an explosion-proof valve core, a valve body, and sealing rings. The waterproof gas-permeable explosion-proof valve core of the present disclosure timely discharges high-temperature and high-pressure in a box body, which prevents explosion or reduces damage caused by explosion. An inner sealing ring in the explosion-proof valve is fixed through an inner sealing ring groove, so that a problem of poor sealing caused by easy falling and displacement of the inner sealing ring is solved. A metal protective shell is disposed on an outer side of an explosion-proof valve spring, a problem that the spring is blocked by battery core jets to weaken pressure relief performance when working is solved. The present disclosure further provides the box body gas tightness detection clamp, which is simple to use and operate.

Examples disclosed herein relate to conduits, devices, systems and methods, which may include a hollow element including an inner surface and an outer surface which allows for a passage of one or more of one or more fluid elements and one or more gaseous elements, a constraining element with one or more openings and one or more non-open elements, one or more blocking elements configured to stop the passage of the at least one of the one or more fluid elements and the one or more gaseous elements when the one or more blocking elements are in a first position relative to the one or more openings, and a movement device configured to move the one or more blocking elements to a second position relative to the one or more openings which allows for the passage of the one or more fluid elements and the one gaseous elements through the one or more openings in the constraining element.

An example system includes a valve assembly having: (i) a plurality of ports including an inlet port, an outlet port, and a vent port, (ii) a solenoid coil having a cavity therein, (iii) an armature slidably accommodated in the cavity of the solenoid coil, (iv) a magnet fixedly disposed within the solenoid coil, wherein the magnet applies a magnetic force on the armature in a distal direction, and (v) a spring applying a biasing force on the armature in a proximal direction; and a controller sending a signal having a particular polarity to the solenoid coil such that the signal is applied to the solenoid coil for a particular period of time, and resending the signal periodically every particular time interval.

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.

A pneumatic valve includes a housing, a first port, a second port, and a third port, each in communication with an interior of the housing, a coil assembly coupled to the housing, a plunger axially movable within the housing between a first position and a second position in response to electrical current being driven through the coil assembly, and a permanent magnet configured to retain the plunger in at least one of the first position or the second position.

An overflow and overheat shutoff safety gas inlet connector, comprising a gas inlet connector, to be connected to the gas source, with a gas inlet hole configured axially, a chamber configured on one end to be connected to the gas inlet hole, and a plurality of holding compartments configured on one side of the chamber, a connecting tube, in threaded connection with the gas inlet connector, with a convex portion on its one end, a transfer canal configured axially and going through the convex portion, said transfer canal matching the gas inlet hole, a first magnetic piece, made of a magnetic material, movably configured inside the chamber and matching the gas inlet hole and the transfer canal, able to seal the transfer canal when being pressed against the convex portion, a plurality of second magnetic pieces, made of a magnetic material, and a plurality of temperature control pieces.

This invention provides a valve-module that is operative with relatively low-pressure pilot-air despite its small size and has excellent durability with less performance-variations than among other similar products. The valve-module of the present invention includes a pilot-port and a biasing-means for biasing the piston-portion in the opposite direction, and controls the opening and closing of the valve by supplying and discharging pilot-air. The first-permanent magnet is held by the first magnet-holder of the valve-rod, and the second-permanent magnet is held by the second magnet-holder of the piston housing. A magnetic-attraction force acts between both permanent magnets and drives the piston in the first direction and increases with the mutual approach of both magnets. Due to the presence of the thin-walled first-and-second collision-avoidance portions, an arrangement-relationship is set between the two permanent magnets such that the end-faces do not directly collide with each other, even when they are closest to each other.

The invention relates to a control system (10) of a fire-extinguishing installation, having at least one control line (11) for controlling a controlling procedure of the fire-extinguishing installation, wherein the control line (11) in a passive operation is unpressurized and the control line (11) in a control operation is impinged with a control pressure, and a safety device (12), fluidically connected to the control line (11), having a pressure equalization chamber (13) in which a holding element (3) and a movable closure element (2) are disposed. It is proposed that the closure element (2) is disposed in the pressure equalization chamber (13) so as to be displaceable between a first terminal position and a second terminal position, and the holding element (3) is configured for exerting on the closure element (2) a restoring force in the direction of the first terminal position, wherein the restoring force on the closure element (2) in the second terminal position of the closure element (2) is higher than the weight force of the closure element (2), and in the first terminal position of the closure element (2) is lower than a pressure force that in the control operation acts as a function of the control pressure on the closure element (2).

The invention relates to a valve. A valve seat (2) encloses a fluid passage (20) for passage of a fluid from a fluid chamber (3). A holding element (4) exerts a holding force on a valve body (1), the holding force acting in a direction towards a valve seat (2). In the event that the fluid acts on an effective surface (10) of the valve body (1) with a force or a pressure above a limit value, the valve body (1) moves away from the valve seat (2). In the event that the fluid acts on an effective surface (40) of the holding element (4) with a force or a pressure above a limit value, the holding force acting on the valve body (1) decreases. In doing so, the fluid acts on the holding element (4) more strongly and/or earlier than on the valve body (1).

Three-port latching valves have a housing with a first port, a second port, and a third port in controlled fluid communication with one another by three, individually electronically controllable magnetically latching valves for a combination of five different flow options. Each valve has a solenoid with an armature movable between an open position and a closed position, a poppet valve connected to the armature, a permanent magnet fixedly seated at a position for magnetically latching the armature in the open position, and a spring positioned to bias the poppet valve closed when the armature is in the closed position. The spring has a pre-selected spring rate that mechanically relieves pressure if the spring rate is exceeded. The armature is movable to the open position after a pulse of voltage to the solenoid and is in an unpowered state after translation to either of the open position or the closed position.