Slit valve apparatuses are described. In one aspect, a slit valve apparatus is disclosed having a gate with at least one sealing surface, a blocker element, and a connector member that structurally connects the gate and the blocker element. Systems and methods including the slit valve apparatus are also disclosed, as are numerous other aspects.

Disclosed are a valve capable of preventing a vortex and a core used therefor. The plastic valve comprises: a body made of plastic; a core formed inside the body; and an opening/closing portion. A fluid transfer hole is formed in the inner space of the core such that a fluid moves therethrough. The opening/closing portion contacts one end of the core through a hole of the body, when the valve is closed, thereby blocking the movement of the fluid. At least a part of the portion of the inner surface of the core, which corresponds to the fluid transfer hole, adjacent to the hole of the body, or at least a part of the portion of the core, which contacts the opening/closing portion, has a curved shape.

Disclosed are a valve capable of preventing a vortex and a core used therefor. The plastic valve comprises: a body made of plastic; a core formed inside the body; and an opening/closing portion. A fluid transfer hole is formed in the inner space of the core such that a fluid moves therethrough. The opening/closing portion contacts one end of the core through a hole of the body, when the valve is closed, thereby blocking the movement of the fluid. At least a part of the portion of the inner surface of the core, which corresponds to the fluid transfer hole, adjacent to the hole of the body, or at least a part of the portion of the core, which contacts the opening/closing portion, has a curved shape.

A hydrant device includes a faucet body, a rotation shaft, an upper rotation cap, a check valve, a switch valve, a lower fixed cap, and a water intake seat. The faucet body is provided with a rotary knob connected with the rotation shaft which is connected with the upper rotation cap. A first elastic member is biased between the rotation shaft and the upper rotation cap. A second elastic member is biased between the upper rotation cap and the check valve. The check valve is provided with a stop face. The switch valve is combined with the upper rotation cap. The water intake seat is mounted on the faucet body. Thus, the stop face forms an anti-reverse state to seal the switch valve, thereby preventing water from being gathered in the switch valve.

A hydrant device includes a faucet body, a rotation shaft, an upper rotation cap, a check valve, a switch valve, a lower fixed cap, and a water intake seat. The faucet body is provided with a rotary knob connected with the rotation shaft which is connected with the upper rotation cap. A first elastic member is biased between the rotation shaft and the upper rotation cap. A second elastic member is biased between the upper rotation cap and the check valve. The check valve is provided with a stop face. The switch valve is combined with the upper rotation cap. The water intake seat is mounted on the faucet body. Thus, the stop face forms an anti-reverse state to seal the switch valve, thereby preventing water from being gathered in the switch valve.

The emergency shower includes a discharge outlet pivotable between a first non-use position and a second deployed position about a rotary union, for dispensing water therefrom. A ball valve is positionable between a first flow restricting position and a second flow permitting position, when the discharge outlet pivots between the first non-use and second deployed positions. A linkage system actuates ball valve movement when the discharge outlet pivots, by way of a first link pivotally coupled relative to the discharge outlet and movable therewith and a second link pivotally coupled with the ball valve and responsive to movement of the first link, the second link positions the ball valve in the first flow restricting position when the discharge outlet is in the first non-use position and commensurately moves the ball valve to the second flow permitting position when the discharge outlet pivots to the second deployed position.

The emergency shower includes a discharge outlet pivotable between a first non-use position and a second deployed position about a rotary union, for dispensing water therefrom. A ball valve is positionable between a first flow restricting position and a second flow permitting position, when the discharge outlet pivots between the first non-use and second deployed positions. A linkage system actuates ball valve movement when the discharge outlet pivots, by way of a first link pivotally coupled relative to the discharge outlet and movable therewith and a second link pivotally coupled with the ball valve and responsive to movement of the first link, the second link positions the ball valve in the first flow restricting position when the discharge outlet is in the first non-use position and commensurately moves the ball valve to the second flow permitting position when the discharge outlet pivots to the second deployed position.

A cone type control valve comprising a cone shaped valve plug movably retained in an similarly shaped opening of a valve housing having horizontal inlet and outlet ports and wherein any reciprocal movements of the conical plug can provide fluid flow from the inlet to the outlet port.

A cone type control valve comprising a cone shaped valve plug movably retained in an similarly shaped opening of a valve housing having horizontal inlet and outlet ports and wherein any reciprocal movements of the conical plug can provide fluid flow from the inlet to the outlet port.

Disclosed herein is a valve apparatus for vehicles that is configured such that the sealability of a valve body can be markedly enhanced. The valve apparatus includes a valve body, a valve member and a sealing unit. The valve body is provided with at least two ports and has an internal space communicating with the ports. The valve member is rotatably installed in the internal space so as to open or close the ports. The sealing unit is provided to seal at least one of the ports. The sealing unit includes a sealing body airtightly installed on an inner surface of the corresponding port, and at least one elastic element integrally provided on a first end of the sealing body. The elastic element axially applies elastic force to the sealing body so that a second end of the sealing body comes into airtight contact with the valve member.